From olpa@sybcom.de  Mon Apr  2 11:15:28 2001
From: olpa@sybcom.de (olpa@sybcom.de)
Date: Mon, 2 Apr 2001 12:15:28 +0200 (CEST)
Subject: [Image-SIG] PIL / group4 CCITT Compression in TIFF
Message-ID: <Pine.LNX.4.30.0104021214220.1083-100000@bastion.forteresse.net>

Hi Folks,

I browsed through the mailing list and found some questions asking for
group4 decompression in TIFF files. I found no hint about a current
development or library available.

Is this still the actual status ?

I would need a group4 decompressor for TIFF files !

Regards,
 oliver

---
"Oh, I've seen copies [of Linux Journal] around the terminal room at The
Labs."
(By Dennis Ritchie)
---
 Oliver Pabst             .-------------------------.
 mailto:olpa@sybcom.de    :                         :
 phone :+49 681 56600600  :    project department   :          SYBCOM GmbH
 fax   :+49 681 56600660  :                         : http://www.sybcom.de



From olpa@sybcom.de  Mon Apr  2 15:34:13 2001
From: olpa@sybcom.de (olpa@sybcom.de)
Date: Mon, 2 Apr 2001 16:34:13 +0200 (CEST)
Subject: [Image-SIG] PIL / group4 CCITT Compression in TIFF
In-Reply-To: <3AC87A32.37FAA399@pobox.com>
Message-ID: <Pine.LNX.4.30.0104021632191.1083-100000@bastion.forteresse.net>

On Today, warmerda@spitfire.velocet.net wrote:

> Date: Mon, 02 Apr 2001 09:10:10 -0400
> From: Frank Warmerdam <warmerdam@pobox.com>
> To: olpa@sybcom.de
> Subject: Re: [Image-SIG] PIL / group4 CCITT Compression in TIFF
>
> olpa@sybcom.de wrote:
> >
> > Hi Folks,
> >
> > I browsed through the mailing list and found some questions asking for
> > group4 decompression in TIFF files. I found no hint about a current
> > development or library available.
> >
> > Is this still the actual status ?
> >
> > I would need a group4 decompressor for TIFF files !
>
> Oliver,
>
> I am a little confused about what you need.  The libtiff library
> already includes support for compressing and decompressing CCITT group 4
> tiff files.  Isn't this what PIL is using?

Unfortunately, this is not really true (I think). I got a blank PIL 1.1.1
from www.pythonware.org and compiled it.

When I execute following code:

>>> a=PIL.Image.open('2000120114153400--0-1.tif')
>>> a.save('b.jpg')
Traceback (innermost last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python1.5/site-packages/PIL/Image.py", line 663, in save
    self.load()
  File "/usr/lib/python1.5/site-packages/PIL/ImageFile.py", line 133, in
load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "/usr/lib/python1.5/site-packages/PIL/Image.py", line 237, in
_getdecoder
    raise IOError, "decoder %s not available" % decoder_name
IOError: decoder group4 not available
>>> exit


where the .tif file is a CCITT group4 compressed file.

It seems, there is no decoder for group4 in PIL.

How can I load this file ???

libtiff should have a group4 decoder...

Regards,
 oliver

---
Running Windows on a Pentium is like having a brand new Porsche but only
be able to drive backwards with the handbrake on.
(Unknown source)
---
 Oliver Pabst             .-------------------------.
 mailto:olpa@sybcom.de    :                         :
 phone :+49 681 56600600  :    project department   :          SYBCOM GmbH
 fax   :+49 681 56600660  :                         : http://www.sybcom.de



From srichter@cbu.edu  Thu Apr  5 11:13:46 2001
From: srichter@cbu.edu (Stephan Richter)
Date: Thu, 05 Apr 2001 05:13:46 -0500
Subject: [Image-SIG] PIL / group4 CCITT Compression in TIFF
In-Reply-To: <Pine.LNX.4.30.0104021632191.1083-100000@bastion.forteresse
 .net>
References: <3AC87A32.37FAA399@pobox.com>
Message-ID: <5.0.2.1.0.20010405051027.00ab6c80@mail.cbu.edu>

>where the .tif file is a CCITT group4 compressed file.
>
>It seems, there is no decoder for group4 in PIL.
>
>How can I load this file ???
>
>libtiff should have a group4 decoder...

This question is asked every two month or so. Indeed, PIL does not support 
the Group4 TIFF format. If you like, you can write your own decoder. The 
documentation for it is fairly good. I used tiffcp to copy it to a 
different format; be aware that the file size will drastically increase.

If you implement the decoder, please post your results to the list. A lot 
of people would like to get the code.

Regards,
Stephan


--
Stephan Richter
CBU - Physics and Chemistry Student
Web2k - Web Design/Development & Technical Project Management



From duncan@rcp.co.uk  Mon Apr  9 15:17:32 2001
From: duncan@rcp.co.uk (Duncan Booth)
Date: Mon, 9 Apr 2001 15:17:32 +0100
Subject: [Image-SIG] PngImagePlugin 0.5 fails to load Png files
Message-ID: <3AD1D28C.8969.3F1DB6BE@localhost>

There seems to be a problem with PngImagePlugin version 0.5 and 
many but not all Png files (I was working my way through the 
images in the Zope Book, and the mono ones load but the colour 
ones don't). The problem is that version 0.5 has sprouted a line:
        self.png.close()
at line 269 near the end of PngImageFile._open. This means that 
when you call the ImageFile.load() method, which calls 
PngImageFile.load_read(), the call:
            cid, pos, len = self.png.read()
fails as the png object is no longer connected to the file. A typical 
traceback is shown below. Possible fixes include deleting the 
self.png.close call on line 269, or setting self.png=None after the 
close and reopening it in load_read as required.

N.B. the source download at Secretlabs has version 0.4 of this file, 
but the windows download has version 0.5, so this problem 
probably hasn't hit Unix users yet.

Python 2.0 (#8, Oct 16 2000, 17:27:58) [MSC 32 bit (Intel)] on win32
Type "copyright", "credits" or "license" for more information.
>>> from PIL import PngImagePlugin, Image
>>> im = Image.open("d:/work/book/Figures/4-3.png")
>>> im.load()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "d:\python20\PIL\ImageFile.py", line 146, in load
    s = self.load_read(self.decodermaxblock)
  File "d:\python20\PIL\PngImagePlugin.py", line 294, in load_read
    cid, pos, len = self.png.read()
  File "d:\python20\PIL\PngImagePlugin.py", line 82, in read
    s = self.fp.read(8)
AttributeError: 'None' object has no attribute 'read'
>>>

-- 
Duncan Booth                                             duncan@dales.rmplc.co.uk
int month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3"
"\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure?
http://dales.rmplc.co.uk/Duncan


From flytv1@yahoo.com  Tue Apr 10 20:20:42 2001
From: flytv1@yahoo.com (t v)
Date: Tue, 10 Apr 2001 12:20:42 -0700 (PDT)
Subject: [Image-SIG] "Pil" module information.
Message-ID: <20010410192042.28693.qmail@web13906.mail.yahoo.com>

To: image-sig@python.org

Hi.
I am in the process of  learning Python and I would
like to use the "Pil" module. I have Python Ver.
2.1a2, from "..Python.org" and I downloaded "Pil" for
this version, and I am using it on a Win98SE as an OS.
I unzipped the module in the main path C:\Python21 and
copied _imaging.pyd into the Dll subdirectory and file
"pil.pth" into C:\Python21 . When I try to draw a
line, see program below, I get a message:
Traceback (most recent call last):
  File "C:\Python21\Tools\idle\linedraw.py", line 1,
in ?
    import Image, ImageDraw
  File "c:\python21\Image.py", line 56, in ?
    import ImagePalette
ImportError: No module named ImagePalette

I see a module named "imagepal.py" in the
C:\Python21\Pil, subdirectory and this is defined as
class ImagePalette: and I am sure this is what it's
needed to make it work. I used a number of other
programming languages in the past and I would like to
get a package together that I could use with Python, 
but it gets to be more difficult than I anticipated.
There are a lot of Plugins/Modules, but they all seem
to be incompatible, wrong versions etc.
  If you know of a package that I can download that
would allow me to "open a file, read data, get
coordinates, (XY) and draw lines between them " it is
all I am trying to accomplish for now, I would greatly
appreciate it. I keep going back to "C" and I know
that Python would be more efficient to use in many
cases, but it appears to be somewhat difficult right
now, at least for Win98SE, OS.

The program I ran:

import Image, ImageDraw
im = Image.open("test.gm")
draw = ImageDraw.Draw(im)
draw.line((0, 0), im.size, fill=128)
draw.line((0, im.size[1]), (im.size[0], 0), fill=128)

Thanks for your effort. Tiberiu Vela (T.V.)


__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail. 
http://personal.mail.yahoo.com/


From fredrik@pythonware.com  Tue Apr 10 20:49:13 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Tue, 10 Apr 2001 21:49:13 +0200
Subject: [Image-SIG] "Pil" module information.
References: <20010410192042.28693.qmail@web13906.mail.yahoo.com>
Message-ID: <02e201c0c1f7$5444c5d0$e46940d5@hagrid>

"flytv1@yahoo.com" wrote:
> I am in the process of  learning Python and I would
> like to use the "Pil" module. I have Python Ver.
> 2.1a2, from "..Python.org" and I downloaded "Pil" for
> this version, and I am using it on a Win98SE as an OS.
> I unzipped the module in the main path C:\Python21 and
> copied _imaging.pyd into the Dll subdirectory and file
> "pil.pth" into C:\Python21.

if you're about to learn a new language, maybe you should
stay away from alpha releases ;-)

(I definitely recommend 2.0 over 2.1 alpha)

> I see a module named "imagepal.py" in the
> C:\Python21\Pil, subdirectory

it should be "ImagePalette.py", not "imagepal.py"

what tool did you use to unzip the library?  make sure you use
winzip [1] or Info-Zip's unzip [2].  older utilities (including pkzip)
don't understand long filenames.

Cheers /F

1) http://www.winzip.com
2) http://www.info-zip.org/pub/infozip/UnZip.html



From fredrik@pythonware.com  Wed Apr 11 14:16:02 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Wed, 11 Apr 2001 15:16:02 +0200
Subject: [Image-SIG] PngImagePlugin 0.5 fails to load Png files
References: <3AD1D28C.8969.3F1DB6BE@localhost>
Message-ID: <00a101c0c289$8fe10210$0900a8c0@SPIFF>

duncan wrote:

> Possible fixes include deleting the self.png.close call on line 269,
> or setting self.png=None after the close and reopening it in load_read
> as required.

iirc, that close call is part of another bug fix (a resource leakage).
looks like it didn't quite work.  I'll look into this for 1.1.2.

Thanks /F



From Aureli.Soria_Frisch@ipk.fhg.de  Thu Apr 12 18:22:34 2001
From: Aureli.Soria_Frisch@ipk.fhg.de (Aureli Soria Frisch)
Date: Thu, 12 Apr 2001 19:22:34 +0200
Subject: [Image-SIG] Bug in paste method?
In-Reply-To: <20010410192042.28693.qmail@web13906.mail.yahoo.com>
Message-ID: <l03010d00b6fb93a48bc9@[153.97.92.109]>

Hi,

I am using the MacPython 2.0 and the PIL included by default there.
When doing:

>>> a=Image.new('L',(128,128))
>>> a.paste(128,(0,0,9,9))
>>> a.save('prova.tif')

A black 128x128 image appears, while up to the documentation an 8x8 box of
grayvalue 128 should appear at the top left corner.

What am I doing wrong?


Thanks in advance,

Aureli

PS: paste() of another image (8x8 icon) is working properly

#################################
Aureli Soria Frisch
Fraunhofer IPK
Dept. Pattern Recognition

post: Pascalstr. 8-9, 10587 Berlin, Germany
e-mail:aureli@ipk.fhg.de
fon: +49 30 39 00 61 50
fax: +49 30 39 17 517
#################################




From nedens@checkerdist.com  Fri Apr 13 14:05:00 2001
From: nedens@checkerdist.com (Nick Edens)
Date: 13 Apr 2001 09:05:00 -0400
Subject: [Image-SIG] JPEG Files not reading DPI settings
Message-ID: <JA8AAAAAABDZLQABYQABVF9A4NhU@checkerdist.com>

When I open a JPEG file (the file is a 300 DPI file) with the Image.open()=
 command it doesn't seem to read in the dpi settings.=20So when I go and sa=
ve it it automatically saves it as a 72DPI file. Does anyone know of any wa=
y to save it in the origonal DPI settings=3F

Any prompt help would be GREATLY appreciated.

- Nick Edens
  Checker Distributors


From too@pk.highway.ne.jp  Sat Apr 14 12:12:26 2001
From: too@pk.highway.ne.jp (Takekun Sato)
Date: Sat, 14 Apr 2001 20:12:26 +0900
Subject: [Image-SIG] Gif file size Too Big for 1x1 image.
Message-ID: <3AD8309A.776C247D@pk.highway.ne.jp>

1x1 pixel Gif image saved with Photoshop is 41Byte and
800Byte with PIL.

(It seems PIL saves all 256 color palettes
 while only one palette is needed for 1x1 image.)

What can I do ?





From jleach@mail.ocis.net  Sat Apr 14 17:17:17 2001
From: jleach@mail.ocis.net (Jason C. Leach)
Date: Sat, 14 Apr 2001 09:17:17 -0700 (PDT)
Subject: [Image-SIG] Gif file size Too Big for 1x1 image.
In-Reply-To: <3AD8309A.776C247D@pk.highway.ne.jp>
Message-ID: <Pine.LNX.4.21.0104140917000.28533-100000@praha>

hi,

Can you get the image format for a GIF and just write it yourself?

j.

......................
..... Jason C. Leach
... University College of the Cariboo.
.. 

On Sat, 14 Apr 2001, Takekun Sato wrote:

> 
> 1x1 pixel Gif image saved with Photoshop is 41Byte and
> 800Byte with PIL.
> 
> (It seems PIL saves all 256 color palettes
>  while only one palette is needed for 1x1 image.)
> 
> What can I do ?
> 
> 
> 
> 
> 
> 
> 



From jasonic@nomadicsltd.com  Sat Apr 14 18:25:06 2001
From: jasonic@nomadicsltd.com (Jason Cunliffe)
Date: Sat, 14 Apr 2001 13:25:06 -0400
Subject: [Image-SIG] extracting frame from movie?
References: <022701c094de$b94dad20$01c8a8c0@it.tin.it>
Message-ID: <008d01c0c507$d9da9e00$c3090740@megapathdsl.net>

----- Original Message -----
From: "Giulio Borrini - Netbuilder" <borrini@netbuilder.it>


> is it possibile with pil or any other lib to extract a frame from an avi
> movie?
> i need it to make a preview of some movies.

Giulio

How did you solve your problme?

I need to do the same thing, also for Quicktime movies. Has anyone done this
already or can point to useful [cross-platform] py-friendly tools.

The immediate application we are developnig is non-profit community web site
where people [mostly artists/filmmakers] upload all sorts of media. The site
uses Zope which has a number of Zope plugins ['Products'] using PIL to do
some nice server side image automatic manipulation. These are being extended
ni intersting ways as demadn grows for a flexible servers-side image
processing toolset. Already It's wonderful what PIL offers. Thanks! :-)

But what has not been met yet afaik, is the strong demand is for thumnailing
Quicktime and Avi files, preferably with option to set some 'keyframe'
params so that people may upload digital movies, and thereby automagically
generate a sequence of thumbnails with timestamp metadata also.

any ideas?

thanks
- Jason
___________________________________________________________
Jason CUNLIFFE = NOMADICS['Interactive Art and Technology']



From too@pk.highway.ne.jp  Mon Apr 16 13:35:02 2001
From: too@pk.highway.ne.jp (Takekun Sato)
Date: Mon, 16 Apr 2001 21:35:02 +0900
Subject: [Image-SIG] Transparent Gif
Message-ID: <3ADAE6F5.9D2E0307@pk.highway.ne.jp>

I would like to make transparent Gif image.
I tested following code but failed to make transparent pixels.
If you know anything, please let me know.
(platform: PIL1.1.1, Python2.0, Win2K)
-----
import Image;
im=Image.new("P",(100,100),0);
im.putpalette([0,0,0,128,128,128]);
for i in range(20,80):
  for j in range(20,40):
    im.putpixel((i,j),1);
im.save("C:/tmp/test.gif",transparency=1);





From fredrik@pythonware.com  Mon Apr 16 15:46:08 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Mon, 16 Apr 2001 16:46:08 +0200
Subject: [Image-SIG] PngImagePlugin 0.5 fails to load Png files
References: <3AD1D28C.8969.3F1DB6BE@localhost>
Message-ID: <012301c0c683$fde8c600$e46940d5@hagrid>

duncan wrote:

> There seems to be a problem with PngImagePlugin version 0.5 and 
> many but not all Png files (I was working my way through the 
> images in the Zope Book, and the mono ones load but the colour 
> ones don't). The problem is that version 0.5 has sprouted a line:
>         self.png.close()
> at line 269 near the end of PngImageFile._open.

here's the "official" patch for this bug (bug id @PIL21)

Cheers /F

*** \py20\PIL\pngimageplugin.py Thu Feb 08 21:40:41 2001
--- PIL/PngImagePlugin.py Mon Apr 16 14:13:29 2001
***************
*** 266,273 ****
              rawmode, data = self.png.im_palette
              self.palette = ImagePalette.raw(rawmode, data)
  
-         self.png.close()
- 
          self.__idat = len # used by load_read()
  
  
--- 267,272 ----
***************
*** 284,290 ****
  
  
      def load_read(self, bytes):
!         "Read more data from chunks (used by ImageFile.load)"
  
          while self.__idat == 0:
              # end of chunk, skip forward to next one
--- 283,289 ----
  
  
      def load_read(self, bytes):
!         "internal: read more image data"
  
          while self.__idat == 0:
              # end of chunk, skip forward to next one
***************
*** 309,315 ****
  
          return self.fp.read(bytes)
  
! #
  # --------------------------------------------------------------------
  # PNG writer
  
--- 308,321 ----
  
          return self.fp.read(bytes)
  
! 
!     def load_end(self):
!         "internal: finished reading image data"
! 
!         self.png.close()
!         self.png = None
! 
! 
  # --------------------------------------------------------------------
  # PNG writer




From Kevin.Cazabon@gretag.com  Mon Apr 16 16:18:33 2001
From: Kevin.Cazabon@gretag.com (Kevin.Cazabon@gretag.com)
Date: Mon, 16 Apr 2001 09:18:33 -0600
Subject: [Image-SIG] JPEG Files not reading DPI settings
Message-ID: <OF771DF025.90ABC692-ON87256A30.0053E740@fotoprint.com>

I ran into the same issue myself... I ended up hacking dpi support into a
few of the PIL file modules, but didn't manage to get it into the JPG
library... I think I found that it needed some deeper changes than I was
willing to make at the time.

If you like, I can send you the tiff, eps, bmp, and other modules that I
DID hack, but don't know if that's of any use to you.  I'd really like to
see PIL support this feature where possible myself, as it's very important
in many situations.


Kevin Cazabon




                                                                                                                    
                    "Nick Edens"                                                                                    
                    <nedens@checke        To:     image-sig@python.org                                              
                    rdist.com>            cc:     (bcc: Kevin Cazabon/sienna/gig)                                   
                                          Subject:     [Image-SIG] JPEG Files not reading DPI settings              
                    04/13/2001                                                                                      
                    07:05 AM                                                                                        
                                                                                                                    
                                                                                                                    





When I open a JPEG file (the file is a 300 DPI file) with the Image.open()
command it doesn't seem to read in the dpi settings. So when I go and save
it it automatically saves it as a 72DPI file. Does anyone know of any way
to save it in the origonal DPI settings?

Any prompt help would be GREATLY appreciated.

- Nick Edens
  Checker Distributors

_______________________________________________
Image-SIG maillist  -  Image-SIG@python.org
http://mail.python.org/mailman/listinfo/image-sig





From too@pk.highway.ne.jp  Mon Apr 16 23:29:33 2001
From: too@pk.highway.ne.jp (Takekun Sato)
Date: Tue, 17 Apr 2001 07:29:33 +0900
Subject: [Image-SIG] Transparent Gif
References: <3ADAE6F5.9D2E0307@pk.highway.ne.jp>
Message-ID: <3ADB724D.76E8400A@pk.highway.ne.jp>

Hello, I have posted 2 articles about gif with titles of
 "Gif file size too big for 1x1 pixel image" and "Transparent Gif"
recently.

I think I have solved the problems by modifying "GifImagePlugin.py".

As to making transparent gif, you can consult a message here.
http://mail.python.org/pipermail/image-sig/1999-December/000949.html


- how to set palette size of saved gif

(I'm not sure it is good way, so tips are presented here
 with no guarantee.
If you find something wrong, or better way
to do the same thing, please send me an email.)

   > im=Image.new("P",(1,1),0);
   > im.putpalette([0,0,0,255,255,255]);
   > im.putpixel(1);
   > im.info["colors"]=2;  #set palette size(extension)
   > im.save("test.gif");

   (A saved image thus was 38Bytes, initially about 800Bytes.)

   Before testing above,
   you need to modify "GifImagePlugin.py" like following.

    (From "GifImagePluglin.py" around line 295)
    # global palette
    if im.mode == "P":
        # colour palette
        ### s.append(im.im.getpalette("RGB"))      #1. comment line 301
        #-------------insertion start-----------#  #2. add following
        palstr=im.im.getpalette("RGB");
        while(1):
            if(im.info.has_key("colors")):
                cols=im.info["colors"]; bits=None;
                if(cols<=0 or cols>256):
                     raise ValueError,"colors(%s) out of range[1:256]
!"%cols
                for i in range(1,8):
                    if(2**i>=cols): bits=i; break;
                if(bits!=None):
                    if(len(palstr)>(3*cols)):
                        palstr=palstr[:(3*(2**bits))];

s=["GIF87a"+o16(im.size[0])+o16(im.size[1])+chr((bits-1)+128)+chr(0)+chr(0),palstr];

                        break;
            s.append(palstr);
            break;
        #--------------insertion end--------------#
    else:
        # greyscale
        for i in range(256):
            s.append(chr(i) * 3)






From fredrik@pythonware.com  Wed Apr 18 10:42:09 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Wed, 18 Apr 2001 11:42:09 +0200
Subject: [Image-SIG] Python 2.1 issues
Message-ID: <000901c0c7eb$d8475790$0900a8c0@spiff>

PIL 1.1.1 works well under 2.1 final, but there are some old code
in there that results in warnings under 2.1.

one problem is that PIL 1.1.1 uses the old "regex" module in a few places.
this module is deprecated in 2.1, and will be phased out in future versions.

in 2.1, the easiest workaround is to filter out that group of warnings:

import warnings
warnings.filterwarnings(action = 'ignore',
                        message='.*regex module is deprecated',
                        category=DeprecationWarning)

(from http://www.amk.ca/python/2.1/index.html)

the other warning is a real bug under 2.1 and earlier: the ImagePalette.random
function assumed that Python already had nested scopes (!).  here's a patch:

--- Imaging-1.1.1/PIL/ImagePalette.py   Wed Jun  7 15:17:04 2000
+++ Imaging-1.2a3/PIL/ImagePalette.py   Wed Apr 18 10:06:09 2001
@@ -62,8 +63,9 @@
     return ImagePalette(mode, palette * len(mode))

 def random(mode = "RGB"):
-    from whrandom import randint
-    palette = map(lambda a: randint(0, 255), [0]*256*len(mode))
+    from random import randint
+    palette = map(lambda a, randint=randint:
+                  randint(0, 255), [0]*256*len(mode))
     return ImagePalette(mode, palette)

 def wedge(mode = "RGB"):

--- end ---

we plan to release a maintenance release some time next week (should
have been this week, but paying customers got in the way ;-)

Cheers /F

PS. for pil plus customers who missed our announcement, another PIL 1.2
prerelease was released yesterday.  see our site for more info.




From gregc@cgl.ucsf.EDU  Thu Apr 19 01:00:00 2001
From: gregc@cgl.ucsf.EDU (Greg Couch)
Date: Wed, 18 Apr 2001 17:00:00 -0700 (PDT)
Subject: [Image-SIG] GeoTIFF? (and patch)
Message-ID: <200104190000.RAA416982@socrates.cgl.ucsf.edu>

Here's an alternative patch to add image resolution and several other
TIFF tags to TIFF files.  Here you would add various entries to the
Image.save's options parameter to place them in a TIFF file.  The ones
I added are: "resolution unit", "resolution", "x resolution", "y resolution",
"software", "date time", "artist", and "copyright".  TIFF images already
supported an image "description" option.  The resolutions are correctly
written as TIFF rational values.

Please cc any replies directly to me as I do not normally read this
mailing list.

	Greg Couch
	UCSF Computer Graphics Lab
	gregc@cgl.ucsf.edu

===================================================================
RCS file: RCS/TiffImagePlugin.py,v
retrieving revision 1.1
diff -c -r1.1 TiffImagePlugin.py
*** TiffImagePlugin.py	2001/04/18 21:40:09	1.1
--- TiffImagePlugin.py	2001/04/18 23:54:25
***************
*** 66,77 ****
--- 66,84 ----
  SAMPLESPERPIXEL = 277
  ROWSPERSTRIP = 278
  STRIPBYTECOUNTS = 279
+ X_RESOLUTION = 282
+ Y_RESOLUTION = 283
  PLANAR_CONFIGURATION = 284
+ RESOLUTION_UNIT = 296
+ SOFTWARE = 305
+ DATE_TIME = 306
+ ARTIST = 315
  PREDICTOR = 317
  COLORMAP = 320
  EXTRASAMPLES = 338
  SAMPLEFORMAT = 339
  JPEGTABLES = 347
+ COPYRIGHT = 33432
  IPTC_NAA_CHUNK = 33723 # newsphoto properties
  PHOTOSHOP_CHUNK = 34377 # photoshop properties
  
***************
*** 313,318 ****
--- 320,328 ----
  		if tag == STRIPOFFSETS:
  		    stripoffsets = len(directory)
  		    typ = 4 # to avoid catch-22
+ 		elif tag in (X_RESOLUTION, Y_RESOLUTION):
+ 		    # identify rational data fields
+ 		    typ = 5
  		else:
  		    typ = 3
  		    for v in value:
***************
*** 329,335 ****
  	    elif len(data) < 4:
  		append((tag, typ, len(value), data + (4-len(data))*"\0", ""))
  	    else:
! 		append((tag, typ, len(value), o32(offset), data))
  		offset = offset + len(data)
  		if offset & 1:
  		    offset = offset + 1 # word padding
--- 339,348 ----
  	    elif len(data) < 4:
  		append((tag, typ, len(value), data + (4-len(data))*"\0", ""))
  	    else:
! 		count = len(value)
! 		if typ == 5:
! 		    count = count / 2	# adjust for rational data field
! 		append((tag, typ, count, o32(offset), data))
  		offset = offset + len(data)
  		if offset & 1:
  		    offset = offset + 1 # word padding
***************
*** 551,556 ****
--- 564,579 ----
      "LAB": ("LAB", 8, 1, (8,8,8), None),
  }
  
+ def _cvt_res(value):
+     # convert value to TIFF rational number -- (numerator, denominator)
+     if type(value) in (type([]), type(())):
+ 	assert(len(value) % 2 == 0)
+ 	return value
+     if type(value) == type(1):
+ 	return (value, 1)
+     value = float(value)
+     return (int(value * 65536), 65536)
+ 
  def _save(im, fp, filename):
  
      try:
***************
*** 566,573 ****
--- 589,626 ----
      ifd[IMAGEWIDTH] = im.size[0]
      ifd[IMAGELENGTH] = im.size[1]
  
+     # additions written by Greg Couch, gregc@cgl.ucsf.edu
+     # inspired by image-sig posting from Kevin Cazabon, kcazabon@home.com
+     if hasattr(im, 'tag'):
+ 	# preserve tags from original TIFF image file
+ 	for key in (RESOLUTION_UNIT, X_RESOLUTION, Y_RESOLUTION):
+ 	    if im.tag.tagdata.has_key(key):
+ 		ifd[key] = im.tag.tagdata.get(key)
      if im.encoderinfo.has_key("description"):
  	ifd[IMAGEDESCRIPTION] = im.encoderinfo["description"]
+     if im.encoderinfo.has_key("resolution"):
+ 	ifd[X_RESOLUTION] = ifd[Y_RESOLUTION] \
+ 				= _cvt_res(im.encoderinfo["resolution"])
+     if im.encoderinfo.has_key("x resolution"):
+ 	ifd[X_RESOLUTION] = _cvt_res(im.encoderinfo["x resolution"])
+     if im.encoderinfo.has_key("y resolution"):
+ 	ifd[Y_RESOLUTION] = _cvt_res(im.encoderinfo["y resolution"])
+     if im.encoderinfo.has_key("resolution unit"):
+ 	unit = im.encoderinfo["resolution unit"]
+ 	if unit == "inch":
+ 		ifd[RESOLUTION_UNIT] = 2
+ 	elif unit == "cm" or unit == "centimeter":
+ 		ifd[RESOLUTION_UNIT] = 3
+ 	else:
+ 		ifd[RESOLUTION_UNIT] = 1
+     if im.encoderinfo.has_key("software"):
+ 	ifd[SOFTWARE] = im.encoderinfo["software"]
+     if im.encoderinfo.has_key("date time"):
+ 	ifd[DATE_TIME] = im.encoderinfo["date time"]
+     if im.encoderinfo.has_key("artist"):
+ 	ifd[ARTIST] = im.encoderinfo["artist"]
+     if im.encoderinfo.has_key("copyright"):
+ 	ifd[COPYRIGHT] = im.encoderinfo["copyright"]
  
      if bits != (1,):
  	ifd[BITSPERSAMPLE] = bits


From bfordham@afpress.com  Sat Apr 21 17:51:01 2001
From: bfordham@afpress.com (Bryan Fordham)
Date: Sat, 21 Apr 2001 12:51:01 -0400
Subject: [Image-SIG] twain support
Message-ID: <3AE1BA75.B5AFAB69@afpress.com>

I've searched the archives and didn't see this answered anywhere. 
Forgive me if I missed it...

Is there a python module that provides TWAIN support on windows?

Thanks,
--B


From kevin_cazabon@hotmail.com  Mon Apr 23 17:45:13 2001
From: kevin_cazabon@hotmail.com (kcazabon@hotmail.com)
Date: Mon, 23 Apr 2001 10:45:13 -0600
Subject: [Image-SIG] Screen capture...
Message-ID: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com>

This is a multi-part message in MIME format.

------=_NextPart_000_000B_01C0CBE2.79ACF780
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Just wondering if anyone knows how to do a "screen capture" through =
Python and save the resulting image through PIL...

I want to create a tool to automatically capture the current screen and =
save it to file (probably after some resizing, etc), and thought this =
might be possible through Python/PIL.

Thanks for any suggestions!

Kevin Cazabon.

------=_NextPart_000_000B_01C0CBE2.79ACF780
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4522.1800" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Just wondering if anyone knows how to =
do a "screen=20
capture" through Python and save the resulting image through =
PIL...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I want to create a tool to =
automatically capture=20
the current screen and save it to file (probably after some resizing, =
etc), and=20
thought this might be possible through Python/PIL.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Thanks for any =
suggestions!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Kevin =
Cazabon.</FONT></DIV></BODY></HTML>

------=_NextPart_000_000B_01C0CBE2.79ACF780--


From kjetil.kjernsmo@astro.uio.no  Tue Apr 24 10:51:47 2001
From: kjetil.kjernsmo@astro.uio.no (Kjetil Kjernsmo)
Date: Tue, 24 Apr 2001 11:51:47 +0200 (MET DST)
Subject: [Image-SIG] Porting PIL to Tru64
Message-ID: <Pine.OSF.4.30.0104232013020.8811-100000@alnair.uio.no>

Dear all,

I have grown soooo sick and tired of xfig I've just got to port Sketch to
Tru64 UNIX (formerly Digital UNIX, osf1V4 or something like that). :-)
To do that, I've got to port PIL, I guess, but I'm stuck.
Unless, of course, somebody allready did, in which case I would be happy
to hear about it.

Anyway, I started last week by having someone install python-2.0
system-wide. I soon ran into the trouble I'm about to describe and gave
up, but my itches was so bad last night, I just got to get it done.

I have compiled both v1.0, which is linked from the Sketch pages and now
v1.1.1. I have used different compilers, both gcc and Compaq's cc. There
is an installation of tcl and tk versions 8.0 and 8.3. I have tried to
link them both (but I haven't tried every possible combination of these).
According to my sysadmin, they are both well tested.

The compilation seems to go through without any trouble, all I need to do
is change a path to where tk and tcl libraries are in the Setup-file.

After having set
setenv PYTHONPATH $HOME/lib/python/site-packages:$HOME/lib/python/site-packages/PIL
setenv LD_LIBRARY_PATH /astro/local/lib:/local/lib:/local/X11R6/lib
(yes, I know I should use a different shell) I run python:

Python 2.0 (#2, Nov 13 2000, 15:15:57) [C] on osf1V4
Type "copyright", "credits" or "license" for more information.
>>> import _imaging
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: Unresolved symbol in /astro/local/lib/libtk8.0.so: XGetInputFocus

I'm not much of a hacker, so I really don't have much of a clue as to how
to address this. So, if anybody feels like taking my paw and guide me
through this, it would be appreciated.

Best,

Kjetil
-- 
Kjetil Kjernsmo
Graduate astronomy-student                    Problems worthy of attack
University of Oslo, Norway            Prove their worth by hitting back
E-mail: kjetikj@astro.uio.no                                - Piet Hein
Homepage <URL:http://www.astro.uio.no/~kjetikj/>
Webmaster@skepsis.no





From bh@intevation.de  Tue Apr 24 15:51:11 2001
From: bh@intevation.de (Bernhard Herzog)
Date: 24 Apr 2001 16:51:11 +0200
Subject: [Image-SIG] Extracting hotspots from xbm files
Message-ID: <6qvgnujqqo.fsf@abnoba.intevation.de>

Hi all,

here's a patch to the XbmImagePlugin so that it also extracts the
hot-spots (important for X-cursors). The hotspot co-ordinates are put
into the image's info dictionary under the key "hot_spot" as a 2-tuple.
It also makes the plugin use re instead of regex.

  Bernhard


*** PIL/XbmImagePlugin.py.orig	Tue Apr 24 16:27:59 2001
--- PIL/XbmImagePlugin.py	Tue Apr 24 16:42:27 2001
***************
*** 18,30 ****
  
  __version__ = "0.3"
  
! import regex, string
  import Image, ImageFile
  
  # XBM header
! xbm_head = regex.compile(
!     "#define[ \t]+[^_]*_width[ \t]+\([0-9]*\)[\r\n]+"
!     "#define[ \t]+[^_]*_height[ \t]+\([0-9]*\)[\r\n]+"
      "[\000-\377]*_bits\[\]"
  )
  
--- 18,34 ----
  
  __version__ = "0.3"
  
! import re, string
  import Image, ImageFile
  
  # XBM header
! xbm_head = re.compile(
!     "#define[ \t]+[^_]*_width[ \t]+(?P<width>[0-9]*)[\r\n]+"
!     "#define[ \t]+[^_]*_height[ \t]+(?P<height>[0-9]*)[\r\n]+"
!     "(?P<hot_spot>"
!     "#define[ \t]+[^_]*_x_hot[ \t]+(?P<xhot>[0-9]*)[\r\n]+"
!     "#define[ \t]+[^_]*_y_hot[ \t]+(?P<yhot>[0-9]*)[\r\n]+"
!     ")?"
      "[\000-\377]*_bits\[\]"
  )
  
***************
*** 40,56 ****
  
      def _open(self):
  
! 	s = xbm_head.match(self.fp.read(512))
  
! 	if s > 0:
! 
! 	    xsize = string.atoi(xbm_head.group(1))
! 	    ysize = string.atoi(xbm_head.group(2))
  
  	    self.mode = "1"
  	    self.size = xsize, ysize
  
! 	    self.tile = [("xbm", (0, 0)+self.size, s, None)]
  
  
  def _save(im, fp, filename):
--- 44,62 ----
  
      def _open(self):
  
! 	match = xbm_head.match(self.fp.read(512))
  
! 	if match is not None:
  
+ 	    xsize = string.atoi(match.group("width"))
+ 	    ysize = string.atoi(match.group("height"))
+ 	    if match.group("hot_spot") is not None:
+ 		self.info["hot_spot"] = (string.atoi(match.group("xhot")),
+ 					 string.atoi(match.group("yhot")))
  	    self.mode = "1"
  	    self.size = xsize, ysize
  
! 	    self.tile = [("xbm", (0, 0)+self.size, match.end(), None)]
  
  
  def _save(im, fp, filename):


-- 
Intevation GmbH                                 http://intevation.de/
Sketch                                 http://sketch.sourceforge.net/
MapIt!                                               http://mapit.de/


From NHYTRO@compuserve.com  Wed Apr 25 13:57:49 2001
From: NHYTRO@compuserve.com (Sharriff Aina)
Date: Wed, 25 Apr 2001 08:57:49 -0400
Subject: [Image-SIG] composition !
Message-ID: <200104250858_MC2-CDD4-54DD@compuserve.com>

Hi List!

Could someone tell me iff its possible to compose strips of images to one=

big image? ( tile the images along the x or Y axis)

Thanks

Sharriff


From spirou@carolo.com  Wed Apr 25 13:02:23 2001
From: spirou@carolo.com (Denis)
Date: Wed, 25 Apr 2001 14:02:23 +0200
Subject: [Image-SIG] Screen capture...
In-Reply-To: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com>; from kevin_cazabon@hotmail.com on Mon, Apr 23, 2001 at 10:45:13AM -0600
References: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com>
Message-ID: <20010425140223.C30110@carolo.com>

Le Mon, Apr 23, 2001 at 10:45:13AM -0600, kcazabon@hotmail.com pianota:
> Just wondering if anyone knows how to do a "screen capture"
> through Python and save the resulting image through PIL...

I'm not a PIL specialist --> my answer is better than no
answer, but ...
I did a capture app once and I used ImageMagick with 

os.system("import -frame %s" % filename)


> Thanks for any suggestions!

Better ideas ?
-- 
Denis FRERE
P3B    : Club Free-Pytho-Linuxien Caroloregien http://www.p3b.org
Aragne : Internet - Reseaux - Formations  http://www.aragne.com


From jasonic@nomadicsltd.com  Wed Apr 25 21:15:38 2001
From: jasonic@nomadicsltd.com (Jason Cunliffe)
Date: Wed, 25 Apr 2001 16:15:38 -0400
Subject: [Image-SIG] Screen capture...
References: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com> <20010425140223.C30110@carolo.com>
Message-ID: <009501c0cdc4$7ec38200$c3090740@megapathdsl.net>

----- Original Message -----
From: "Denis" <spirou@carolo.com>

> I'm not a PIL specialist --> my answer is better than no
> answer, but ...
> I did a capture app once and I used ImageMagick with
>
> os.system("import -frame %s" % filename)

Hi

I need to do something like this. Was planning to use PIL or a Zope prodcyt
liek 'Photo'  so I can capture and automatically upload and thumbnail users
screens.

Needs to be very cross platform, opensource..

I am new to ImageMagick.
How did you interface it to Python?  ...Details, examples welcome

One crazy idea I just had is to look at VNC
VNC has versatile ways for grabbing screens and section of them.
An awesome tool. Free...
Would be great to connect VNC and PIL!

http://www.uk.research.att.com/vnc/
<quote>
What is VNC? - A practical introduction
VNC stands for Virtual Network Computing. It is, in essence, a remote
display system which allows you to view a computing 'desktop' environment
not only on the machine where it is running, but from anywhere on the
Internet and from a wide variety of machine architectures.
</quote>

- Jason



From spirou@carolo.com  Thu Apr 26 03:45:50 2001
From: spirou@carolo.com (Denis)
Date: Thu, 26 Apr 2001 04:45:50 +0200
Subject: [Image-SIG] Screen capture...
In-Reply-To: <009501c0cdc4$7ec38200$c3090740@megapathdsl.net>; from jasonic@nomadicsltd.com on Wed, Apr 25, 2001 at 04:15:38PM -0400
References: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com> <20010425140223.C30110@carolo.com> <009501c0cdc4$7ec38200$c3090740@megapathdsl.net>
Message-ID: <20010426044550.C31609@carolo.com>

Le Wed, Apr 25, 2001 at 04:15:38PM -0400, Jason Cunliffe pianota:
> ----- Original Message -----
> From: "Denis" <spirou@carolo.com>
> 
> > I'm not a PIL specialist --> my answer is better than no
> > answer, but ...
> > I did a capture app once and I used ImageMagick with
> >
> > os.system("import -frame %s" % filename)
> 
> Hi
> 
> I need to do something like this. Was planning to use PIL or
> a Zope prodcyt liek 'Photo'  so I can capture and
> automatically upload and thumbnail users screens.
> 
> Needs to be very cross platform, opensource..

Open-Source : no problem.
Cross-platform : I don't think ImageMagick would compile on a
Win box.

> I am new to ImageMagick.
> How did you interface it to Python?  ...Details, examples
> welcome

It's just a os.system() call.
For the rest, you have to read the doc of ImageMagick to set
the right command for your needs.
Once you've captured and saved an image file, you can work on
it with PIL or use it in Zope (never used the Photo product you
are speaking of).

> One crazy idea I just had is to look at VNC
> VNC has versatile ways for grabbing screens and section of them.
> An awesome tool. Free...
> Would be great to connect VNC and PIL!

I've played with VNC, but I don't think it would be that easy
to "connect" it to PIL. In my head, it's far from a screen
capture app.

Won't a true guru give his 2 cents here ?

-- 
Denis FRERE
P3B    : Club Free-Pytho-Linuxien Caroloregien http://www.p3b.org
Aragne : Internet - Reseaux - Formations  http://www.aragne.com


From fredrik@pythonware.com  Thu Apr 26 09:46:25 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 26 Apr 2001 10:46:25 +0200
Subject: [Image-SIG] composition !
References: <200104250858_MC2-CDD4-54DD@compuserve.com>
Message-ID: <006c01c0ce2d$61a223c0$0900a8c0@spiff>

Sharriff Aina wrote:
>
> Could someone tell me iff its possible to compose strips of images to one
> big image? ( tile the images along the x or Y axis)

using PIL, you can simply paste the strips into the resulting
big image.  See the "cutting, pasting, and merging" section
in the PIL tutorial:
http://www.pythonware.com/library/pil/handbook/intro01.htm

more info on PIL can be found here:
http://www.pythonware.com/products/pil/index.htm

Cheers /F




From fredrik@pythonware.com  Thu Apr 26 09:56:12 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 26 Apr 2001 10:56:12 +0200
Subject: [Image-SIG] Porting PIL to Tru64
References: <Pine.OSF.4.30.0104232013020.8811-100000@alnair.uio.no>
Message-ID: <007c01c0ce2e$bf269c50$0900a8c0@spiff>

Kjetil Kjernsmo wrote:
> I have grown soooo sick and tired of xfig I've just got to port Sketch to
> Tru64 UNIX (formerly Digital UNIX, osf1V4 or something like that). :-)
> To do that, I've got to port PIL, I guess, but I'm stuck.

I've used PIL on that platform since long before it was known as
tru64, and we do test all releases on that platform.

> After having set
> setenv PYTHONPATH $HOME/lib/python/site-packages:$HOME/lib/python/site-packages/PIL
> setenv LD_LIBRARY_PATH /astro/local/lib:/local/lib:/local/X11R6/lib

looks like you're using a non-standard X11 install (/local/X11R6 is
not where X11 is installed by default).  if that's the case, the only
ones who can help you here are your local sysadms.

(and let's hope they have very good reasons for using a non-standard
X11 install on a tru64 box... ;-)

> ImportError: Unresolved symbol in /astro/local/lib/libtk8.0.so: XGetInputFocus

fwiw, this symbol is usually defined in libX11.a (or libX11.so).

Cheers /F




From kjetil.kjernsmo@astro.uio.no  Thu Apr 26 10:49:35 2001
From: kjetil.kjernsmo@astro.uio.no (Kjetil Kjernsmo)
Date: Thu, 26 Apr 2001 11:49:35 +0200 (MET DST)
Subject: [Image-SIG] Porting PIL to Tru64
In-Reply-To: <007c01c0ce2e$bf269c50$0900a8c0@spiff>
Message-ID: <Pine.OSF.4.30.0104261135250.25294-100000@alnair.uio.no>

Thanks a lot for the response!

On Thu, 26 Apr 2001, Fredrik Lundh wrote:

>Kjetil Kjernsmo wrote:
>> I have grown soooo sick and tired of xfig I've just got to port Sketch to
>> Tru64 UNIX (formerly Digital UNIX, osf1V4 or something like that). :-)
>> To do that, I've got to port PIL, I guess, but I'm stuck.
>
>I've used PIL on that platform since long before it was known as
>tru64, and we do test all releases on that platform.

Good!

>> After having set
>> setenv PYTHONPATH $HOME/lib/python/site-packages:$HOME/lib/python/site-packages/PIL
>> setenv LD_LIBRARY_PATH /astro/local/lib:/local/lib:/local/X11R6/lib
>
>looks like you're using a non-standard X11 install (/local/X11R6 is
>not where X11 is installed by default).  if that's the case, the only
>ones who can help you here are your local sysadms.

Hm... Actually, we are discouraged from setting LD_LIBRARY_PATH at all,
and if we do set it, it should be in a wrapper script.... Anyway, there
exists a symlink /local/X11 -> /local/X11R6, so it is there. I always
heard that it's /local/X11R6/lib I would include in LD_LIBRARY_PATH if I
did include anything.

But wouldn't this mean that changing
setenv LD_LIBRARY_PATH /astro/local/lib:/local/lib:/local/X11R6/lib
to
setenv LD_LIBRARY_PATH /astro/local/lib:/local/lib:/local/X11/lib
would solve the problem?

>> ImportError: Unresolved symbol in /astro/local/lib/libtk8.0.so: XGetInputFocus
>
>fwiw, this symbol is usually defined in libX11.a (or libX11.so).

I see. I found this in /local/X11/lib:
lrwxr-xr-x   1 root     system        13 Nov 10 23:41 libX11.so -> libX11.so.6.1
-rw-r--r--   1 root     staff    1155072 Nov 11  1998 libX11.so.6.1

does this make sense...?

Best,

Kjetil
-- 
Kjetil Kjernsmo
Graduate astronomy-student                    Problems worthy of attack
University of Oslo, Norway            Prove their worth by hitting back
E-mail: kjetikj@astro.uio.no                                - Piet Hein
Homepage <URL:http://www.astro.uio.no/~kjetikj/>
Webmaster@skepsis.no



From Aureli.Soria_Frisch@ipk.fhg.de  Thu Apr 26 11:17:31 2001
From: Aureli.Soria_Frisch@ipk.fhg.de (Aureli Soria Frisch)
Date: Thu, 26 Apr 2001 12:17:31 +0200
Subject: [Image-SIG] composition !
In-Reply-To: <006c01c0ce2d$61a223c0$0900a8c0@spiff>
References: <200104250858_MC2-CDD4-54DD@compuserve.com>
Message-ID: <l03010d01b70da5e98da7@[153.97.92.109]>

Hello,

>using PIL, you can simply paste the strips into the resulting
>big image.  See the "cutting, pasting, and merging" section
>in the PIL tutorial:
>http://www.pythonware.com/library/pil/handbook/intro01.htm
>

Now thinking about paste method , maybe someone could answer an e-mail I
sent some days ago:


>I am using the MacPython 2.0 and the PIL included by default there.
>When doing:
>
>>>> a=Image.new('L',(128,128))
>>>> a.paste(128,(0,0,9,9))
>>>> a.save('prova.tif')
>
>A black 128x128 image appears, while up to the documentation an 8x8 box of
>grayvalue 128 should appear at the top left corner (I think).
>
>What am I doing wrong?
>
>
>Thanks in advance,
>
>Aureli
>
>PS: paste() of another image (8x8 icon) is working properly

Regards


#################################
Aureli Soria Frisch
Fraunhofer IPK
Dept. Pattern Recognition

post: Pascalstr. 8-9, 10587 Berlin, Germany
e-mail:aureli@ipk.fhg.de
fon: +49 30 39 00 61 50
fax: +49 30 39 17 517
#################################




From fredrik@pythonware.com  Thu Apr 26 11:46:26 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 26 Apr 2001 12:46:26 +0200
Subject: [Image-SIG] composition !
References: <200104250858_MC2-CDD4-54DD@compuserve.com> <l03010d01b70da5e98da7@[153.97.92.109]>
Message-ID: <00f101c0ce3e$258596e0$0900a8c0@spiff>

Aureli Soria Frisch wrote:

> Now thinking about paste method , maybe someone could answer an e-mail I
> sent some days ago:
>
> >I am using the MacPython 2.0 and the PIL included by default there.
> >When doing:
> >
> >>>> a=Image.new('L',(128,128))
> >>>> a.paste(128,(0,0,9,9))
> >>>> a.save('prova.tif')
> >
> >A black 128x128 image appears, while up to the documentation an 8x8 box of
> >grayvalue 128 should appear at the top left corner (I think).
> >
> >What am I doing wrong?

in theory, nothing.  it works just fine for me, on Windows
with PIL 1.1.1.

in case you cannot update, here's a workaround:

    def paste(image, ink, box):
        size = box[2] - box[0], box[3] - box[1]
        plate = Image.new(image.mode, size, ink)
        image.paste(plate, box)

Cheers /F




From Kevin.Cazabon@gretag.com  Thu Apr 26 16:11:02 2001
From: Kevin.Cazabon@gretag.com (Kevin.Cazabon@gretag.com)
Date: Thu, 26 Apr 2001 09:11:02 -0600
Subject: [Image-SIG] Screen capture...
Message-ID: <OF564EE2FA.C8F485E0-ON87256A3A.00533978@fotoprint.com>


>> Won't a true guru give his 2 cents here ?

There's got to be a way to do this through the Win32API module... my needs
are Win-only, so that should work, but unfortunately not if you need
cross-platform.

I'll post the same screen-cap question on comp.lang.python tonite, and let
you know if anything turns up, Win-specific or not.


Kevin.




From jasonic@nomadicsltd.com  Thu Apr 26 17:06:46 2001
From: jasonic@nomadicsltd.com (Jason Cunliffe)
Date: Thu, 26 Apr 2001 12:06:46 -0400
Subject: [Image-SIG] Screen capture...
References: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com> <20010425140223.C30110@carolo.com> <009501c0cdc4$7ec38200$c3090740@megapathdsl.net> <20010426044550.C31609@carolo.com>
Message-ID: <001701c0ce6a$e525f860$c3090740@megapathdsl.net>

----- Original Message -----
From: "Denis" <spirou@carolo.com>

> Open-Source : no problem.
> Cross-platform : I don't think ImageMagick would compile on a
> Win box.

The Good news is VNC very cross-platform [they call it 'Any-to-Any'], and
even has recompiled binaries for ftp also.

> I've played with VNC, but I don't think it would be that easy
> to "connect" it to PIL. In my head, it's far from a screen
> capture app.

<quote from http://www.uk.research.att.com/vnc/howitworks.html >
The VNC protocol is a simple protocol for remote access to graphical user
interfaces.   It is based on the concept of a remote framebuffer or RFB. In
the past we have tended to refer to the VNC protocol as the RFB protocol, so
you may have seen this term in other publications.  The protocol simply
allows a server to update the framebuffer displayed on a viewer. Because it
works at the framebuffer level it is potentially applicable to all operating
systems, windowing systems and applications. This includes X/Unix, Windows
3.1/95/NT and Macintosh, but might also include PDAs, and indeed any device
with some form of communications link. The protocol will operate over any
reliable transport such as TCP/IP.
</quote>

How it Works
http://www.uk.research.att.com/vnc/howitworks.html
Screenshots
http://www.uk.research.att.com/vnc/screenshots.html
VNC Protocol
http://www.uk.research.att.com/vnc/protocol.html


Easy? Depends on one's skill..
Alas I am not a C/C++ programmer so it is harder for me to say. But
installing and running VNC is very easy. There are a number of add-ons and
modifications people have made, VNC has a small but bright, focused user
community.

I see severl possible approaches:

A. 'Tweak' NVC client to allow python to grab and convert images uses PIL,
ImageMagick etc.

B. Embed Python inside of a VNC Server / Client.

C. Implement a version of VNC in Python eigther from scracth or more likely
by taking VNC and making it a Python extension module.

VNC Contributions
http://www.uk.research.att.com/vnc/contribs.html


Source and binaries from:
http://www.uk.research.att.com/vnc/download.html

any thoughts?

- Jason
___________________________________________________________
Jason CUNLIFFE = NOMADICS['Interactive Art and Technology']



From fredrik@pythonware.com  Thu Apr 26 18:13:33 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 26 Apr 2001 19:13:33 +0200
Subject: [Image-SIG] Screen capture...
References: <OF564EE2FA.C8F485E0-ON87256A3A.00533978@fotoprint.com>
Message-ID: <005501c0ce74$44b22e30$e46940d5@hagrid>

kevin wrote:
> There's got to be a way to do this through the Win32API module... my needs
> are Win-only, so that should work, but unfortunately not if you need
> cross-platform.

I just posted a simple "grabscreen" extension module to

    http://effbot.org/pil

the PYD file requires Python 2.0 (PY20 or compatible), and
has only been tested on a Win2k box.

Cheers /F



From mmiller3@iupui.edu  Fri Apr 27 00:23:45 2001
From: mmiller3@iupui.edu (Michael A. Miller)
Date: 26 Apr 2001 18:23:45 -0500
Subject: [Image-SIG] Screen capture...
In-Reply-To: Denis's message of "Thu, 26 Apr 2001 04:45:50 +0200"
References: <OE57kmRjNhHmdGOApCc000020f5@hotmail.com> <20010425140223.C30110@carolo.com> <009501c0cdc4$7ec38200$c3090740@megapathdsl.net> <20010426044550.C31609@carolo.com>
Message-ID: <87ae53s0se.fsf@lumen.med.iupui.edu>

>>>>> "Denis" == Denis  <spirou@carolo.com> writes:

    > Open-Source : no problem.  Cross-platform : I don't think
    > ImageMagick would compile on a Win box.

Actually, 

   "ImageMagick is known to compile and run on virtually any
    Unix. system and Linux. It also runs under Windows 2000,
    Windows 95/98, Macintosh, VMS, and OS2. See the install guide
    for compiling instructions. Pre-compiled binaries are
    available for some of the more popular operating systems. The
    entire source and binary distribution is also available for a
    limited time on CD."

                                  <http://www.imagemagick.org/>


From jasonic@nomadicsltd.com  Fri Apr 27 00:51:49 2001
From: jasonic@nomadicsltd.com (Jason Cunliffe)
Date: Thu, 26 Apr 2001 19:51:49 -0400
Subject: [Image-SIG] Screen capture...
References: <OF564EE2FA.C8F485E0-ON87256A3A.00533978@fotoprint.com> <005501c0ce74$44b22e30$e46940d5@hagrid>
Message-ID: <003101c0ceab$dcf13a60$c3090740@megapathdsl.net>

From: "Fredrik Lundh" <fredrik@pythonware.com>
> I just posted a simple "grabscreen" extension module to
> 
>     http://effbot.org/pil
> 
> the PYD file requires Python 2.0 (PY20 or compatible), and
> has only been tested on a Win2k box.

Thankyou :-) 
What is need to make this also work on Mac and Linux?

cheers
- Jason

___________________________________________________________
Jason CUNLIFFE = NOMADICS['Interactive Art and Technology']



From deirdre@deirdre.net  Fri Apr 27 01:12:43 2001
From: deirdre@deirdre.net (Deirdre Saoirse Moen)
Date: Thu, 26 Apr 2001 17:12:43 -0700
Subject: [Image-SIG] Screen capture...
In-Reply-To: <003101c0ceab$dcf13a60$c3090740@megapathdsl.net>
References: <OF564EE2FA.C8F485E0-ON87256A3A.00533978@fotoprint.com>
 <005501c0ce74$44b22e30$e46940d5@hagrid>
Message-ID: <l03130304b70e69d0a466@[10.0.1.20]>

>From: "Fredrik Lundh" <fredrik@pythonware.com>
>> I just posted a simple "grabscreen" extension module to
>>
>>     http://effbot.org/pil
>>
>> the PYD file requires Python 2.0 (PY20 or compatible), and
>> has only been tested on a Win2k box.
>
>Thankyou :-)
>What is need to make this also work on Mac and Linux?

Is there a mac port of PIL?

If not, is anyone working on it?  If so, who do I contact?

--
_Deirdre     Stash-o-Matic: http://weirdre.com      http://deirdre.net
"I love deadlines. I like the whooshing sound they make as they fly by."
                                                         - Douglas Adams




From fredrik@pythonware.com  Fri Apr 27 09:32:08 2001
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Fri, 27 Apr 2001 10:32:08 +0200
Subject: [Image-SIG] Screen capture...
References: <OF564EE2FA.C8F485E0-ON87256A3A.00533978@fotoprint.com> <005501c0ce74$44b22e30$e46940d5@hagrid> <l03130304b70e69d0a466@[10.0.1.20]>
Message-ID: <003801c0cef4$8cd7f840$0900a8c0@spiff>

Deirdre Saoirse Moen wrote:
> Is there a mac port of PIL?

the standard Mac distribution includes PIL:
http://www.python.org/download/download_mac.html

(I don't have a Mac myself, so I cannot offer an "official"
port.  contributions are welcome ;-)

Cheers /F