From John-Mark Gurney <gurney_j@resnet.uoregon.edu>  Wed May  3 20:51:03 2000
From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> (John-Mark Gurney)
Date: Wed, 3 May 2000 12:51:03 -0700
Subject: [Image-SIG] broken configure script...
Message-ID: <20000503125103.38770@hydrogen.funkthat.com>

When I did a ./configure in Imaging-1.0/libImaging, it didn't check
the standard location /usr/local/lib for libjpeg, but that isn't the
real bug.. the real bug is that when I do:
./configure --with-jpeg=/usr/local/lib it then fails to find the jpeg
library because the configure script didn't include the -L<pathtojpeg>
in the Makefile...

This is based off of:
MD5 (Imaging-1.0.tar.gz) = aa42c8a7eede77a54973a150c90af78a
3822401520 313109 Imaging-1.0.tar.gz

-- 
  John-Mark Gurney				Voice: +1 408 975 9651
  Cu Networking		   "I say all sorts of useless things." -- cmc


From parish@ikb.mavt.ethz.ch  Thu May  4 14:20:34 2000
From: parish@ikb.mavt.ethz.ch (Yoav I H Parish)
Date: Thu, 04 May 2000 15:20:34 +0200
Subject: [Image-SIG] A small question
Message-ID: <39117922.EBA77FA8@ikb.mavt.ethz.ch>

Hello,

I would like to use the ImageDraw library to draw overlays. If i use the
draw.line
i can't see the line on the picture.
Anybody?

thanxinadvance
yogi

P.s. The  ImageDraw docs have the example wrong. It should go something
like
import Image, ImageDraw, sys

im = Image.open("whatever.tif")

draw = ImageDraw.Draw(im)
draw.line([(0,0), im.size],fill=128)
draw.line([(0,im.size[1]), (im.size[0],0)], fill=128)

im.save(sys.stdout, "TIFF")




From Mark.Scheele@usa.xerox.com  Mon May  8 17:55:20 2000
From: Mark.Scheele@usa.xerox.com (Scheele, Mark L)
Date: Mon, 08 May 2000 12:55:20 -0400
Subject: [Image-SIG] .TIFF Group4 not available?
Message-ID: <4148FB13B35FD211936F0008C74CD98C2C9761@USA4280MS1>

Help. Trying to write a simple module to convert a .TIFF to a .JPEG.

Keep getting an error: group4 decoder not available:  See code below.

Repeat. Help. (i.e. how do i make group4 available?)

Thanks.

Python 1.5.1 (#0, Jun 15 1998, 11:13:40) [MSC 32 bit (Intel)] on win32
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import Image
>>> i = Image.open("./testing/large.tif")
>>> i.save("new.tif")
Traceback (innermost last):
  File "<stdin>", line 1, in ?
  File "c:\py15\Pil\Image.py", line 654, in save
    self.load()
  File "c:\py15\Pil\ImageFile.py", line 134, in load
    d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
  File "c:\py15\Pil\Image.py", line 227, in _getdecoder
    raise IOError, "decoder %s not available" % decoder_name
IOError: decoder group4 not available

---------------------------------------------------------	Mark Scheele
	
mark.scheele@usa.xerox.com







From srichter@cbu.edu  Tue May  9 16:21:40 2000
From: srichter@cbu.edu (Stephan Richter)
Date: Tue, 09 May 2000 10:21:40 -0500
Subject: [Image-SIG] Group4 TIFF
Message-ID: <4.3.1.0.20000509102031.00a85db0@mail.cbu.edu>

I know that this question was asked many times, but does someone has a 
Group4 TIFF plug-in for PIL? Alpha quality will do for now.

Regards,
Stephan
--
Stephan Richter - (901) 573-3308 - srichter@cbu.edu
CBU - Physics & Chemistry; Framework Web - Web Design & Development
PGP Key: 735E C61E 5C64 F430 4F9C 798E DCA2 07E3 E42B 5391



From jason@streetrodstuff.com  Mon May 15 15:14:43 2000
From: jason@streetrodstuff.com (Jason Long)
Date: Mon, 15 May 2000 10:14:43 -0400
Subject: [Image-SIG] Help w/ resize
Message-ID: <20000515101443.A19991@skytrail.columbus.rr.com>

Hi, I am a newbie to the PIL library and I need a little help.

For the record, I am using Python/PIL on Redhat 6.1 - Python version 1.5.2.

Here is my scenario:  I have some images of all different sizes that I would like to resize to a size of 275 pixels wide, and I don't care how tall.  I want to preserve the aspect ratio, though.  I have had success with the thumbnail() function, however the image quality is not very good.  I was thinking that I would get better results with resize() since I could specify BILINEAR or BICUBIC filters.  I guess I am not exactly sure how to use the resize function correctly for my needs.

To summarize, I need to:
- resize images of different sizes to (275, x)
- generate the best quality I can

Basically, I'd like the thumbnail functionality with better output quality.  I'm sure I'm simply not doing something correctly.  Perhaps a snipet of code would do me best.

Thank you very much in advance.

Jason

-- 
Jason Long
Webmaster http://www.streetrodstuff.com



From kingsley@krt.com.au  Mon May 15 21:11:19 2000
From: kingsley@krt.com.au (Kingsley)
Date: Tue, 16 May 2000 06:11:19 +1000
Subject: [Image-SIG] Re: Image-SIG digest, Vol 1 #273 - 1 msg
References: <20000515160027.7C76B1CD7B@dinsdale.python.org>
Message-ID: <392059E7.13414EF0@krt.com.au>

 
> To summarize, I need to:
> - resize images of different sizes to (275, x)
> - generate the best quality I can
> 
> Basically, I'd like the thumbnail functionality with better output quality.
> I'm sure I'm simply not doing something correctly.  
> Perhaps a snipet of code would do me best.

Snippety-Snip

### Get some stats from the uploaded image
im = Image.open(pict_file_path)
pict_hires_x = im.size[0]
pict_hires_y = im.size[1]

###
### If the image is too big, resize it to 200x150ish
###
if pict_hires_x > 200 or pict_hires_y > 150:
    newx = 200
    newy = 150
    if pict_hires_x > pict_hires_y:
        newy = pict_hires_y * newx / pict_hires_x
    else:
        newx = pict_hires_x * newy / pict_hires_y
    im = im.resize((newx,newy),Image.BICUBIC)

im.save(thumb_filename,"JPEG",quality=50,optimize=1)

I think you should be able to just change the sizes and 
fire the sucker up.


cheers,
-kt


--
Kingsley Turner, mailto:kingsley@krt.com.au
Mad Dog's Breakfast:
    The Travel Magazine that doesn't take itself too seriously
    http://www.MadDogsBreakfast.com


From mvmendes@mailcity.com  Sat May 20 20:04:06 2000
From: mvmendes@mailcity.com (Marcus Mendes)
Date: Sat, 20 May 2000 12:04:06 -0700
Subject: [Image-SIG] Photo Animate
Message-ID: <OBBBAIBEIGFCBAAA@mailcity.com>

Hello
I need animate 3 consecutive photos. How can I to do it in Python (or in Zope)?
Someone can help me? 

Thanks.

Marcus Mendes




Get your FREE Email at http://mailcity.lycos.com
Get your PERSONALIZED START PAGE at http://my.lycos.com


From srichter@plandepot.com  Sat May 20 21:27:36 2000
From: srichter@plandepot.com (Stephan Richter)
Date: Sat, 20 May 2000 13:27:36 -0700
Subject: [Image-SIG] Photo Animate
In-Reply-To: <OBBBAIBEIGFCBAAA@mailcity.com>
Message-ID: <4.3.1.0.20000520132447.00aa9870@mail.cbu.edu>

At 12:04 PM 5/20/00 -0700, you wrote:
>Hello
>I need animate 3 consecutive photos. How can I to do it in Python (or in 
>Zope)?
>Someone can help me?

PIL allows you to save animated GIFs. You can also write a little Image 
server in Zope and use an HTTP refresh to get the next picture. Depending 
on how well versed you are with Zope it should be no problem. But I think 
that would be an overkill. Animated GIFds are better.

I have written an Image server (not complete yet) for Zope I could send you 
though.

Just my 2 cents.

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



From vsuvorov@cccglobal.com  Sun May 21 03:47:00 2000
From: vsuvorov@cccglobal.com (Vadim Suvorov)
Date: Sat, 20 May 2000 21:47:00 -0500
Subject: [Image-SIG] PIL problems
Message-ID: <NCBBJGFJCJLNPFPHPAFACEHDCBAA.vsuvorov@cccglobal.com>

This is a multi-part message in MIME format.

------=_NextPart_000_0000_01BFC2A4.EDC37CE0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Hello,

I just started to use PIL 1.01b (of 11/01/99) and have a few problems:

1. I can not read black/white bitmaps (
...
  File "C:\Program Files\Python\Lib\PIL\BmpImagePlugin.py", line 136, in
_open
    self._bitmap()
  File "C:\Program Files\Python\Lib\PIL\BmpImagePlugin.py", line 85, in
_bitmap
    raise IOError, "Unknown BMP header type"
IOError: Unknown BMP header type

). I used MS Paint to save file in 1-bit per point mode.

2. I have a bitmap of 3086 x 2775 256 colors. An attempt to use viewer to
display it causes Python failure in TK80:

PYTHON caused an invalid page fault in
module TK80.DLL at 015f:00c8f329.
Registers:
EAX=00000000 CS=015f EIP=00c8f329 EFLGS=00010206
EBX=1e152a10 SS=0167 ESP=0063f534 EBP=0063f538
ECX=00000000 DS=0167 ESI=004acfe4 FS=441f
EDX=0045059c ES=0167 EDI=00450e80 GS=0000
Bytes at CS:EIP:
89 51 08 8b e5 5d c3 55 8b ec 83 ec 34 8b 45 0c
Stack dump:
00000000 0063f57c 00cce658 00000000 0045059c 00450e80 004acfe4 00000c0e
00000ad7 0063f5a4 00000000 00000000 0ad70c0e 00000020 00000002 00000000

Is there any limits on what can be viewed?

3. An attempt to process images like:

import Image

...

fails with message:

  File "C:\Program Files\Python\Lib\PIL\ImageDraw.py", line 29, in __init__
    im.load()
  File "C:\Program Files\Python\Lib\PIL\ImageFile.py", line 117, in load
    self.map = Image.core.map(self.filename)
  File "C:\Program Files\Python\Lib\PIL\Image.py", line 40, in __getattr__
    raise ImportError, "The _imaging C module is not installed"
ImportError: The _imaging C module is not installed


However,

import Tkinter
import Image
...

fixes the situation. I do not understand how this is related (Python-wise).

4. In the same bitmap from 2 (3086 x 2775 256 colors), I tried to draw a
line:

draw = ImageDraw.Draw(im)
draw.line(((0, 0), im.size), fill=128)

An operation fails with message:

PYTHON caused an invalid page fault in
module _IMAGING.DLL at 015f:00d653b0.
Registers:
EAX=00000000 CS=015f EIP=00d653b0 EFLGS=00010293
EBX=86ae1996 SS=0167 ESP=0063faa0 EBP=000015ae
ECX=00000c80 DS=0167 ESI=000009a0 FS=593f
EDX=00000000 ES=0167 EDI=00806620 GS=0000
Bytes at CS:EIP:
88 0c 03 85 f6 7c 0c 8b 5c 24 20 03 d3 8b 5c 24
Stack dump:
00806870 00000000 0063fb08 00000000 00d65f1f 00806620 00000001 0000181c
00000001 00000c0e 00000080 00d5421b 00806620 00000000 00000000 00000c0e

I appreciate your help,

Vadim





------=_NextPart_000_0000_01BFC2A4.EDC37CE0
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>

<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR>
</HEAD>
<BODY bgColor=3D#ffffff>
<P><FONT size=3D2><FONT face=3DArial>Hello,<BR><BR>I just started to use =
PIL 1.01b=20
(of 11/01/99) and have a few problems:<BR><BR>1. I can not read =
black/white=20
bitmaps (<BR>...<BR></FONT><FONT face=3D"Courier New">&nbsp; File =
&quot;C:\Program=20
Files\Python\Lib\PIL\BmpImagePlugin.py&quot;, line 136, in=20
_open<BR>&nbsp;&nbsp;&nbsp; self._bitmap()<BR>&nbsp; File =
&quot;C:\Program=20
Files\Python\Lib\PIL\BmpImagePlugin.py&quot;, line 85, in=20
_bitmap<BR>&nbsp;&nbsp;&nbsp; raise IOError, &quot;Unknown BMP header=20
type&quot;<BR>IOError: Unknown BMP header type<BR></FONT><BR><FONT =
face=3DArial>).=20
I used MS Paint to save file in 1-bit per point mode.</FONT></FONT><FONT =

face=3DArial></FONT></P>
<P><FONT size=3D2><FONT face=3DArial>2. I have a bitmap of 3086 x 2775 =
256 colors.=20
An attempt to use viewer to display it causes Python failure in=20
TK80:</FONT></FONT><FONT face=3DArial></FONT></P>
<P><FONT size=3D2><FONT face=3D"Courier New">PYTHON caused an invalid =
page fault=20
in<BR>module TK80.DLL at 015f:00c8f329.<BR>Registers:<BR>EAX=3D00000000 =
CS=3D015f=20
EIP=3D00c8f329 EFLGS=3D00010206<BR>EBX=3D1e152a10 SS=3D0167 =
ESP=3D0063f534=20
EBP=3D0063f538<BR>ECX=3D00000000 DS=3D0167 ESI=3D004acfe4 =
FS=3D441f<BR>EDX=3D0045059c=20
ES=3D0167 EDI=3D00450e80 GS=3D0000<BR>Bytes at CS:EIP:<BR>89 51 08 8b e5 =
5d c3 55 8b=20
ec 83 ec 34 8b 45 0c <BR>Stack dump:<BR>00000000 0063f57c 00cce658 =
00000000=20
0045059c 00450e80 004acfe4 00000c0e <BR>00000ad7 0063f5a4 00000000 =
00000000=20
0ad70c0e 00000020 00000002 00000000 </FONT></FONT></P>
<P><FONT color=3D#000000 face=3DArial size=3D2>Is there any limits on =
what can be=20
viewed?</FONT></P>
<P><FONT face=3DArial size=3D2>3. An attempt to process images =
like:</FONT></P><FONT=20
face=3DArial size=3D2>
<P><FONT face=3D"Courier New">import Image</FONT></P>
<P><FONT face=3D"Courier New">...</FONT></P>
<P>fails with message:</P>
<P><FONT face=3DCourier>&nbsp; File &quot;C:\Program=20
Files\Python\Lib\PIL\ImageDraw.py&quot;, line 29, in=20
__init__<BR>&nbsp;&nbsp;&nbsp; im.load()<BR>&nbsp; File &quot;C:\Program =

Files\Python\Lib\PIL\ImageFile.py&quot;, line 117, in =
load<BR>&nbsp;&nbsp;&nbsp;=20
self.map =3D Image.core.map(self.filename)<BR>&nbsp; File =
&quot;C:\Program=20
Files\Python\Lib\PIL\Image.py&quot;, line 40, in=20
__getattr__<BR>&nbsp;&nbsp;&nbsp; raise ImportError, &quot;The _imaging =
C module=20
is not installed&quot;<BR>ImportError: The _imaging C module is not=20
installed<BR></FONT></P>
<P>However, </P><FONT face=3DArial size=3D2>
<P><FONT face=3D"Courier New">import Tkinter<BR></FONT><FONT=20
face=3D"Courier New">import Image<BR></FONT><FONT=20
face=3D"Courier New">...</FONT></P></FONT>
<P>fixes the situation. I do not understand how this is related=20
(Python-wise).</P>
<P>4. In the same bitmap from 2 (3086 x 2775 256 colors), I tried to =
draw a=20
line:</P>
<P><FONT face=3D"Courier New">draw =3D =
ImageDraw.Draw(im)<BR>draw.line(((0, 0),=20
im.size), fill=3D128)</FONT></P>
<P>An operation fails with message:</P>
<P><FONT face=3DCourier>PYTHON caused an invalid page fault in<BR>module =

_IMAGING.DLL at 015f:00d653b0.<BR>Registers:<BR>EAX=3D00000000 CS=3D015f =

EIP=3D00d653b0 EFLGS=3D00010293<BR>EBX=3D86ae1996 SS=3D0167 =
ESP=3D0063faa0=20
EBP=3D000015ae<BR>ECX=3D00000c80 DS=3D0167 ESI=3D000009a0 =
FS=3D593f<BR>EDX=3D00000000=20
ES=3D0167 EDI=3D00806620 GS=3D0000<BR>Bytes at CS:EIP:<BR>88 0c 03 85 f6 =
7c 0c 8b 5c=20
24 20 03 d3 8b 5c 24 <BR>Stack dump:<BR>00806870 00000000 0063fb08 =
00000000=20
00d65f1f 00806620 00000001 0000181c <BR>00000001 00000c0e 00000080 =
00d5421b=20
00806620 00000000 00000000 00000c0e </FONT></P>
<P>I appreciate your help,</P>
<P>Vadim<BR></P>
<P>&nbsp;</P></FONT></BODY></HTML>

------=_NextPart_000_0000_01BFC2A4.EDC37CE0--



From vsuvorov@cccglobal.com  Sun May 21 04:01:49 2000
From: vsuvorov@cccglobal.com (Vadim Suvorov)
Date: Sat, 20 May 2000 22:01:49 -0500
Subject: [Image-SIG] PIL performance issue
Message-ID: <NCBBJGFJCJLNPFPHPAFAKEHDCBAA.vsuvorov@cccglobal.com>

Hello,

I have a fairly big bitmap (3086 x 2775 256 colors, about 8.5 MB) in which I
need to find pixels of certain color (for example, most of bitmap is black
and white, except for 4 red pixels, and 3-5 yellow).

I came up (after optimization) with solution like:

im = Image.open("myfile.bmp")
im.load()
xxx = range(im.size[0]); yyy = range(im.size[1])
imx = im.im # for sake of speed, bypass Image's wrapper (7 times faster)
coords = {}
for iy in yyy:
  for ix in xxx:
    c = imx.getpixel((ix, iy))
    if c <> 0 and c <> 255:
      if coords.has_key(c): coords[c].append((ix, iy))
      else: coords[c] = [(ix, iy)]
print coords

but it is still fairly slow (about 50+ seconds on 400 MHz Pentium II). I
know there are methods like Point(), but they do not have access to
coordinates of the point. Is there any way to speed up the process?

Thank you,

Vadim



From kcaza@cymbolic.com  Fri May 26 22:46:10 2000
From: kcaza@cymbolic.com (kcaza@cymbolic.com)
Date: Fri, 26 May 2000 14:46:10 -0700
Subject: [Image-SIG] PIL performance issue
Message-ID: <882568EB.007795AE.00@mail.cymbolic.com>


To do pixel-by-pixel analysis, you may have better luck doing it as a list
instead of reading each pixel with getpixel.  You can use the .tostring()
function to do this.  I believe that this will significantly improve your
performance.

As for the image size... PIL is capable of much higher, so I wouldn't worry
about it.  I've processed single files that are over 1GB in size using PIL...
not the fastest thing in the world, but it worked fine.

Kevin Cazabon.






"Vadim Suvorov" <vsuvorov@cccglobal.com> on 05/20/2000 08:01:49 PM

To:   image-sig@python.org
cc:    (bcc: Kevin Cazabon/cymbolic/gig)

Subject:  [Image-SIG] PIL performance issue




Hello,

I have a fairly big bitmap (3086 x 2775 256 colors, about 8.5 MB) in which I
need to find pixels of certain color (for example, most of bitmap is black
and white, except for 4 red pixels, and 3-5 yellow).

I came up (after optimization) with solution like:

im = Image.open("myfile.bmp")
im.load()
xxx = range(im.size[0]); yyy = range(im.size[1])
imx = im.im # for sake of speed, bypass Image's wrapper (7 times faster)
coords = {}
for iy in yyy:
  for ix in xxx:
    c = imx.getpixel((ix, iy))
    if c <> 0 and c <> 255:
      if coords.has_key(c): coords[c].append((ix, iy))
      else: coords[c] = [(ix, iy)]
print coords

but it is still fairly slow (about 50+ seconds on 400 MHz Pentium II). I
know there are methods like Point(), but they do not have access to
coordinates of the point. Is there any way to speed up the process?

Thank you,

Vadim


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






From kcaza@cymbolic.com  Fri May 26 23:02:51 2000
From: kcaza@cymbolic.com (kcaza@cymbolic.com)
Date: Fri, 26 May 2000 15:02:51 -0700
Subject: [Image-SIG] Help w/ resize
Message-ID: <882568EB.00791CED.00@mail.cymbolic.com>


Basically, you just need to find out the aspect ratio of the new file at 275
pixels wide, and resize it using that size.  It's pretty simple.

##############
import Image

def BetterThumbnail(im, xmax, ymax):
     inaspect =float(im.size[0])/ float(im.size[1])
     outaspect = float(xmax) / float(ymax)

     if inaspect > outaspect: # meaning that xmax will be used in resizing, and
y will be determined by aspect ratio
          im = im.resize((xmax, int((float(xmax) / inaspect) + 0.5)),
Image.BICUBIC) # round it off, resize with Bicubic
     else: # meaning that ymax will be used in resizing, and x will be
determined by aspect ratio
          im = im.resize((int((float(ymax) * inaspect) + 0.5), ymax),
Image.BICUBIC)

     return im

################

That should do it for ya... check it out with a couple test images though, it's
similar to what I use in my stuff, but not exactly the same.

Kevin.





Jason Long <jason@streetrodstuff.com> on 05/15/2000 07:14:43 AM

To:   image-sig@python.org
cc:    (bcc: Kevin Cazabon/cymbolic/gig)

Subject:  [Image-SIG] Help w/ resize




Hi, I am a newbie to the PIL library and I need a little help.

For the record, I am using Python/PIL on Redhat 6.1 - Python version 1.5.2.

Here is my scenario:  I have some images of all different sizes that I would
like to resize to a size of 275 pixels wide, and I don't care how tall.  I want
to preserve the aspect ratio, though.  I have had success with the thumbnail()
function, however the image quality is not very good.  I was thinking that I
would get better results with resize() since I could specify BILINEAR or BICUBIC
filters.  I guess I am not exactly sure how to use the resize function correctly
for my needs.

To summarize, I need to:
- resize images of different sizes to (275, x)
- generate the best quality I can

Basically, I'd like the thumbnail functionality with better output quality.  I'm
sure I'm simply not doing something correctly.  Perhaps a snipet of code would
do me best.

Thank you very much in advance.

Jason

--
Jason Long
Webmaster http://www.streetrodstuff.com


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






From srichter@cbu.edu  Sun May 28 08:53:49 2000
From: srichter@cbu.edu (Stephan Richter)
Date: Sun, 28 May 2000 00:53:49 -0700
Subject: [Image-SIG] Picture Streaming using PIL
Message-ID: <4.3.1.0.20000528004713.00a924e0@mail.cbu.edu>

Hello everyone,

did ever someone try to create a pixel stream, so that a client can start 
displaying the pixels as soon as they are received?

Long Version:
My client asked me to write a server client system for the Web that would 
stream a picture to the client, since some modem connections of her Web 
site members are still very slow. We will start with black and white TIF 
files. I was thinking about writing a Java Applet as the client.
On the server side I will have Zope with an extension (Product) called 
ImageServer (which I already started coding). The ImageServer would then 
use PIL to convert and zoom the image to the correct size and format and 
then send the stream. The ImageServer already serves images upon a regular 
HTTP request.
Does anyone of you know a software package I can look at?

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