From johnsonm@redhat.com  Tue Jul  6 18:06:52 1999
From: johnsonm@redhat.com (Michael K. Johnson)
Date: Tue, 06 Jul 1999 13:06:52 -0400
Subject: [Image-SIG] PIL version question
Message-ID: <199907061706.NAA10745@tristan.devel.redhat.com>

From the PIL README:
>The Python Imaging Library adds image processing capabilities to your
>Python interpreter.  This library provides extensive file format
>support, an efficient internal representation, and fairly powerful
>image processing capabilities.
>
>This is hopefully the only beta release of 1.0 (formerly known as
>0.3).  If no serious problems are found with this release, it will
>be rereleased as 1.0 final before then end of January 1999.

Has a 1.0 release just fallen prey to schedule pressures?  Or has a
serious problem been found that has prevented a 1.0 release?

Thanks, and sorry to trouble you,

michaelkjohnson

"Magazines all too frequently lead to books and should be regarded by the
 prudent as the heavy petting of literature."            -- Fran Lebowitz
 Linux Application Development       http://www.redhat.com/~johnsonm/lad/



From fredrik@pythonware.com  Wed Jul  7 08:56:04 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Wed, 7 Jul 1999 09:56:04 +0200
Subject: [Image-SIG] PIL version question
References: <199907061706.NAA10745@tristan.devel.redhat.com>
Message-ID: <003301bec84e$2a41c430$f29b12c2@secret.pythonware.com>

> >From the PIL README:
> >The Python Imaging Library adds image processing capabilities to your
> >Python interpreter.  This library provides extensive file format
> >support, an efficient internal representation, and fairly powerful
> >image processing capabilities.
> >
> >This is hopefully the only beta release of 1.0 (formerly known as
> >0.3).  If no serious problems are found with this release, it will
> >be rereleased as 1.0 final before then end of January 1999.
> 
> Has a 1.0 release just fallen prey to schedule pressures?  Or has a
> serious problem been found that has prevented a 1.0 release?

a combination, as usual...  for the current plan, see
the product description page:

    http://www.pythonware.com/products/pil/

</F>



From arne.keller@ppm.u-psud.fr  Thu Jul  8 16:24:31 1999
From: arne.keller@ppm.u-psud.fr (Arne Keller)
Date: Thu, 08 Jul 1999 17:24:31 +0200
Subject: [Image-SIG] pbs with Jpeg
Message-ID: <3784C2AF.6D19FA50@ppm.u-psud.fr>

I'm trying to install PIL (Imaging-1.0b1) on linux.

and I have the following compilation error:

gcc -O -I./. -I/usr/local/include -DHAVE_CONFIG_H   -c JpegDecode.c -o
JpegDecode.o
JpegDecode.c:42: parse error before `void'
JpegDecode.c:48: parse error before `boolean'
JpegDecode.c:55: parse error before `void'
JpegDecode.c:96: parse error before `void'
JpegDecode.c:100: `cinfo' undeclared here (not in a function)
JpegDecode.c:100: warning: data definition has no type or storage class
JpegDecode.c:105: parse error before `->'
JpegDecode.c:105: conflicting types for `longjmp'
/usr/include/setjmp.h:93: previous declaration of `longjmp'
JpegDecode.c:105: warning: data definition has no type or storage class
JpegDecode.c: In function `ImagingJpegDecode':
JpegDecode.c:130: warning: assignment makes pointer from integer without a cast
make: *** [JpegDecode.o] Error 1

anybody may help me?!
-- 
Arne Keller
Laboratoire de Photophysique Moleculaire du CNRS.
Universite de Paris-Sud, 91405 Orsay Cedex, France.
tel.: (33) 1 69 15 82 83 -- fax. : (33) 1 69 15 67 77


From fredrik@pythonware.com  Fri Jul  9 09:36:01 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Fri, 9 Jul 1999 10:36:01 +0200
Subject: [Image-SIG] pbs with Jpeg
References: <3784C2AF.6D19FA50@ppm.u-psud.fr>
Message-ID: <005201bec9e7$88ea08e0$f29b12c2@secret.pythonware.com>

Arne Keller <arne.keller@ppm.u-psud.fr> wrote:
> I'm trying to install PIL (Imaging-1.0b1) on linux.
> 
> and I have the following compilation error:
> 
> gcc -O -I./. -I/usr/local/include -DHAVE_CONFIG_H   -c JpegDecode.c -o
> JpegDecode.o
> JpegDecode.c:42: parse error before `void'
> JpegDecode.c:48: parse error before `boolean'
> JpegDecode.c:55: parse error before `void'
> JpegDecode.c:96: parse error before `void'
> JpegDecode.c:100: `cinfo' undeclared here (not in a function)
> JpegDecode.c:100: warning: data definition has no type or storage class
> JpegDecode.c:105: parse error before `->'
> JpegDecode.c:105: conflicting types for `longjmp'
> /usr/include/setjmp.h:93: previous declaration of `longjmp'
> JpegDecode.c:105: warning: data definition has no type or storage class
> JpegDecode.c: In function `ImagingJpegDecode':
> JpegDecode.c:130: warning: assignment makes pointer from integer without a cast
> make: *** [JpegDecode.o] Error 1

you have an old version of the JPEG library (probably
version 6, not 6a or later).

either update your JPEG library, or change the offending
lines from

    METHODDEF(...)

to

    METHODDEF ...

(and so on)

</F>



From fredrik@pythonware.com  Sat Jul 10 11:11:00 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Sat, 10 Jul 1999 12:11:00 +0200
Subject: [Image-SIG] ann: pil "1.0c1" now available
Message-ID: <001d01becabc$89012a90$f29b12c2@secret.pythonware.com>

due to changed weekend plans (Tornerspel i Grefsnäs -- se till
att vara där -- jag känns igen på min mozilla.org t-shirt ;-), what
was supposed to be 1.0 final is released as "PIL 1.0 release
candidate 1" (aka 1.0c1) instead.  grab your own copy from:

    http://www.pythonware.com/products/pil/

note: it hasn't been fully tested on non-Windows platforms, and
the new Tkinter "plugin" mechanism is not included.

the real release will appear within a few days (unless someone
on this list uncovers something really serious, that is...)

ovaga attack!-ly yrs /F



From valdez@garlic.fnal.gov  Tue Jul 13 17:11:26 1999
From: valdez@garlic.fnal.gov (Adrian Valdez of Embry_Riddle_Aeronautics_Univ)
Date: Tue, 13 Jul 1999 11:11:26 -0500 (CDT)
Subject: [Image-SIG] To svae a Tkinter image.
Message-ID: <199907131611.LAA10628@garlic.fnal.gov>


	Greeting everybody! I was wondering if the PIL can grab a
screen display created with Tkinter and save it to a file. It seems it
can open images and edit them and save them, but what I need is not to
open an image but to get the one on the screen and save it to a
file. Can PIL do this?? Thank you in advance. 


Sincerely 

Adrian Valdez
valdez@fnal.gov


From Kingsley.Turner@praxa.com.au  Thu Jul 15 00:42:38 1999
From: Kingsley.Turner@praxa.com.au (Turner, Kingsley)
Date: Thu, 15 Jul 1999 09:42:38 +1000
Subject: [Image-SIG] im.save("xyz.jpg") - quality?
Message-ID: <6521FD1F9256D211B5130000F87E19F348DBA4@SYDINFO>

This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

------_=_NextPart_001_01BECE52.DFA1FC30
Content-Type: text/plain;
	charset="iso-8859-1"

G'day,

Is there any way to configure the way the PIL saves jpegs ?

I've got some code to make thumbnails (ok, it's almost the
same as in the manual).  

I'd really like to minimise the file size said thumbnails, and the
best way to do this is use the JPEG 'optimise' feature of the encoder
and to set the JPEG quality to about 50%.  (50% is a bit dodgey for
reproduction, but fine for thumbs)

Does the PIL automatically do 'optimized' jpeg saves ?

Is there a way I can adjust the quality factor for the compression
algorithm ?

ta muchly,
-kt

--
Kingsley Turner
Praxa x399 or mobile 0419621568 
"He's not the messiah, he's a very naughty boy!"
                                            -Brian's Mum

------_=_NextPart_001_01BECE52.DFA1FC30
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Diso-8859-1">
<META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
5.5.2448.0">
<TITLE>im.save(&quot;xyz.jpg&quot;) - quality?</TITLE>
</HEAD>
<BODY>

<P><FONT SIZE=3D2>G'day,</FONT>
</P>

<P><FONT SIZE=3D2>Is there any way to configure the way the PIL saves =
jpegs ?</FONT>
</P>

<P><FONT SIZE=3D2>I've got some code to make thumbnails (ok, it's =
almost the</FONT>
<BR><FONT SIZE=3D2>same as in the manual).&nbsp; </FONT>
</P>

<P><FONT SIZE=3D2>I'd really like to minimise the file size said =
thumbnails, and the</FONT>
<BR><FONT SIZE=3D2>best way to do this is use the JPEG 'optimise' =
feature of the encoder</FONT>
<BR><FONT SIZE=3D2>and to set the JPEG quality to about 50%.&nbsp; (50% =
is a bit dodgey for</FONT>
<BR><FONT SIZE=3D2>reproduction, but fine for thumbs)</FONT>
</P>

<P><FONT SIZE=3D2>Does the PIL automatically do 'optimized' jpeg saves =
?</FONT>
</P>

<P><FONT SIZE=3D2>Is there a way I can adjust the quality factor for =
the compression</FONT>
<BR><FONT SIZE=3D2>algorithm ?</FONT>
</P>

<P><FONT SIZE=3D2>ta muchly,</FONT>
<BR><FONT SIZE=3D2>-kt</FONT>
</P>

<P><FONT SIZE=3D2>--</FONT>
<BR><FONT SIZE=3D2>Kingsley Turner</FONT>
<BR><FONT SIZE=3D2>Praxa x399 or mobile 0419621568 </FONT>
<BR><FONT SIZE=3D2>&quot;He's not the messiah, he's a very naughty =
boy!&quot;</FONT>
<BR><FONT =
SIZE=3D2>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =
-Brian's Mum</FONT>
</P>

</BODY>
</HTML>
------_=_NextPart_001_01BECE52.DFA1FC30--



From fredrik@pythonware.com  Thu Jul 15 02:02:29 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 15 Jul 1999 03:02:29 +0200
Subject: [Image-SIG] im.save("xyz.jpg") - quality?
References: <6521FD1F9256D211B5130000F87E19F348DBA4@SYDINFO>
Message-ID: <000801bece5d$b6c3d3c0$f29b12c2@secret.pythonware.com>

im.save("xyz.jpg") - quality?Turner, Kingsley wrote:
> Is there any way to configure the way the PIL saves jpegs ? 
> I've got some code to make thumbnails (ok, it's almost the 
> same as in the manual).  
> I'd really like to minimise the file size said thumbnails, and the 
> best way to do this is use the JPEG 'optimise' feature of the encoder 
> and to set the JPEG quality to about 50%.  (50% is a bit dodgey for 
> reproduction, but fine for thumbs) 
> Does the PIL automatically do 'optimized' jpeg saves ? 
> Is there a way I can adjust the quality factor for the compression 
> algorithm ? 

try:

    im.save("xyz.jpg", quality=50, optimize=1)

for details, see the description of the save method at:
http://www.pythonware.com/library/pil/handbook/image.htm
the available save options are found here:
http://www.pythonware.com/library/pil/handbook/formats.htm

<F href="http://www.pythonware.com/people/fredrik/busy.htm">



From fredrik@pythonware.com  Thu Jul 15 02:08:43 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 15 Jul 1999 03:08:43 +0200
Subject: [Image-SIG] problems with  Imaging 1.0b1
References: <001301bec283$11ff4940$0f42d3d4@gej98>
Message-ID: <003201bece5f$379b6b60$f29b12c2@secret.pythonware.com>

Jens Gelhaar wrote:
> but, I got alway the following error message
> File "F:\Python\JPEGKleinerMachen.py", line 11, in ?
> im.save(outfile,"JPEG")
> File "E:\Programme\Python\Lib\imaging\Image.py", line 654, in save
> self.load()
> File "E:\Programme\Python\Lib\imaging\ImageFile.py", line 134, in load
> d = Image._getdecoder(self.mode, d, a, self.decoderconfig)
> File "E:\Programme\Python\Lib\imaging\Image.py", line 225, in _getdecoder
> return apply(decoder, (mode,) + args + extra)
> TypeError: illegal argument type for built-in operation
>
> What is wrong? The example is from the tuturial?

looks like your PIL python library doesn't
match the _imaging module.  try:

>>> import Image
>>> Image.__file__
'c:\\somewhere\\Image.pyc'
>>> Image.core.__file__
'c:\\somewhere\\_imaging.dll'

and make sure those filenames are what
you expect...

</F>



From fredrik@pythonware.com  Thu Jul 15 02:12:59 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Thu, 15 Jul 1999 03:12:59 +0200
Subject: [Image-SIG] To svae a Tkinter image.
References: <199907131611.LAA10628@garlic.fnal.gov>
Message-ID: <003301bece5f$37ef7ed0$f29b12c2@secret.pythonware.com>

Adrian Valdez <valdez@garlic.fnal.gov> wrote:
> Greeting everybody! I was wondering if the PIL can grab a
> screen display created with Tkinter and save it to a file. It seems it
> can open images and edit them and save them, but what I need is not to
> open an image but to get the one on the screen and save it to a
> file. Can PIL do this??

nope.

you could try doing the screen capture by calling "xv"
or "xwd" or some other tool from your script.  or you
can surf over to www.scriptics.com and see if you can
find some Tk extension...

</F>



From fredrik@pythonware.com  Mon Jul 19 12:40:01 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Mon, 19 Jul 1999 13:40:01 +0200
Subject: [Image-SIG] any comments on 1.0c1?
References: <001d01becabc$89012a90$f29b12c2@secret.pythonware.com>
Message-ID: <00c701bed1db$707bd800$f29b12c2@secret.pythonware.com>

> the real release will appear within a few days (unless someone
> on this list uncovers something really serious, that is...)

1.0 final is almost ready for distribution.  it
will be almost identical to 1.0c1, with the
following additions:

-- the ability to hook up with Tk without
rebuilding the _tkinter module.

-- some minor tweaks to compile silently on a
few more platforms (gcc, axp).

is there anything else I've missed?  please let
me know before wednesday!

</F>



From dmarko@digi-trade.cz  Wed Jul 21 10:42:25 1999
From: dmarko@digi-trade.cz (dmarko@digi-trade.cz)
Date: Wed, 21 Jul 1999 10:42:25 +0100
Subject: [Image-SIG] PIL fonts quetstion
Message-ID: <412567B5.0035CE5C.00@digi-trade.cz>


I would like  to use international fonts (ISO-8859-2) with PIL. I have
converted appropriate pcf font, but when I want to use it with int.
characters, error occures. Without intl. characters, all seems to work
fine.
Do i need make some change to "metrics.dat"  file (there was no change
after font conversion) or what to do?

Thanks,
David Marko




From fredrik@pythonware.com  Wed Jul 21 18:15:26 1999
From: fredrik@pythonware.com (Fredrik Lundh)
Date: Wed, 21 Jul 1999 19:15:26 +0200
Subject: [Image-SIG] PIL fonts quetstion
References: <412567B5.0035CE5C.00@digi-trade.cz>
Message-ID: <002201bed39c$a0fa9c10$f29b12c2@secret.pythonware.com>

dmarko@digi-trade.cz wrote:
> I would like  to use international fonts (ISO-8859-2) with PIL. I have
> converted appropriate pcf font, but when I want to use it with int.
> characters, error occures.

what error?

</F>



From schorsch@schorsch.com  Fri Jul 23 11:11:24 1999
From: schorsch@schorsch.com (Georg Mischler)
Date: Fri, 23 Jul 1999 06:11:24 -0400 (EDT)
Subject: [Image-SIG] PIL with dynamic image data?
Message-ID: <Pine.BSF.4.10.9907230603260.2882-100000@emancholl.pair.com>

Hi all imageneers...

I sent this question allready to the list a few months
ago, and was told that nobody had time to answer it
before the (then) pending next release of PIL was out.
Looks like this might be happening right now again...
Since I have solved most of my non PIL related problems
in the mean time, I still decided to just bother the
list again.

What I need is not a detailed description about every
step (though I wouldn't complain ;), but just a few
pointers about which possible ways I should study more
carefully than others. I'm not a complete newbie to
programming in Python or C (though my real background
is architecture and lighting design), but finding the
right way through a library package like PIL will be
definitively easier with a little expert help.

Thanks in advance for any information!
Here comes the problem:

I want to use PIL for the image manupulation module
of a larger python application. However, I have
to handle an input image format with is a bit different
than most others.

The images are generated by the lighting simulation system
Radiance (http://radsite.lbl.gov), and store luminance
values as seen from a certain view in of a simulated scene.
Due to the high dynamic range of this data the values are
stored in floating point format, represented by 4 bytes
for each pixel. The first three bytes are the red, green
and blue mantissas, and the fourth byte is a common
exponent (the format also uses run length encoding,
but that should not a problem).

So far everything is fine, routines to read, store and
convert this format exist in ansi C.
The question that bothers me is how difficult it would
be to use PIL for handling this kind of data, and how
tricky the needed extensions will be to write.

The user should be able to read such a file and the result
will be converted to rgb image brighness values according
to a gamma function for display. Users will want to edit
the gamma value and see the result, as well as the "exposure"
value, which sets an absolute relation between luminance
and brightness. There may be other filters needed, which
reduce the dynamic range of the data according to the way
the human eye would perceive a given scene in reality.

I assume that I will have to keep two sets of data in
memory (unless I want to reread the original file for
every filter operation), one holding the luminance values,
and the other the converted brightness values for display.

Now come the questions:

- What PIL format will be best for handling the different
  kinds of data? I guess that RGB (RGBA?) is simplest for
  dislpay.
- Is it correct that the F format is currently designed
  for greyscale data only? Would I need to use three sets
  of F data to hold color luminance?
- Could it make sense to "abuse" RGBA and store everything
  in there as it comes from the file?
- Would it be simpler to add a new file format for dynamic
  floating point color data? If yes, how simple?
- How difficult will it be to add filters to convert from 
  and to each of the combined F, abused RGBA or new trippleF
  formats?
- Can filters also be implemented as plugins?
- I just realised that I haven't found out yet if plugins
  have to be implemented in python, or if they can also
  be written in C...
- Any simple and obvious solution I may have overlooked?
- Any other questions I should have asked first? ;)


If I actually manage to implement the functionality as
above with PIL (and your help!), I plan to contribute
the parts of it that are of general interest back to PIL,
though this may still be months away.
Ah, and before I forget, everything should work with NT
and unix.


Thanks for any insights!

-schorsch

-- 
Georg Mischler  --  simulation developper  --  schorsch at schorsch.com
+schorsch.com+  --  lighting design tools  --  http://www.schorsch.com/



From KCAZA@cymbolic.com  Fri Jul 23 20:28:00 1999
From: KCAZA@cymbolic.com (Kevin Cazabon)
Date: Fri, 23 Jul 1999 12:28:00 -0700
Subject: [Image-SIG] Creating HUGE images...
Message-ID: <s7985fdf.079@cymbolic.com>

I'm trying to develop an easy method to create images much larger than the memory
available on the host computer, and have one big question:

-Is there any way to create a NEW image on the hard drive (with blank background)
without first creating it in memory?  This way, I can create the 'canvas' as large as
I want, and paste in small chunks of data manually as I go, staying within the memory
limits of the machine.  (Writing to an existing file shouldn't be a problem, just
creating the blank file in the first place is causing me problems)

I know I can read small sections of an image file at a time, using Fred's earlier
suggestion of modifying the .tile attribute.  What I really need now is same thing
for writing to a file.

Thanks,

Kevin Cazabon.
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                                     
                                                                             


From KCAZA@cymbolic.com  Thu Jul 29 23:07:20 1999
From: KCAZA@cymbolic.com (Kevin Cazabon)
Date: Thu, 29 Jul 1999 15:07:20 -0700
Subject: [Image-SIG] Creating HUGE images...
Message-ID: <s7a06e49.093@cymbolic.com>

Well, huge is 1.2GB or so... a full-res 50x50" image at 406.4dpi (for output on a
LightJet laser photoplotter, using photographic paper).

I know I could PROBABLY thrash an NT box around overnight with such an image and a
whack of VM, but I figured that if I could simply create a "dummy" file on the hard
drive, and re-write the data portion line-by-line manually it would be MUCH faster.

Alternatively, is there an easy way to create the header and trailer portions of a
standard TIFF file (I'd know the size and details of the final image before I
started) so that I could do all this manually?  My alternative is to just write a RAW
file to the HD, and open it as such in my imaging program (which does support RAW). 
That's the ugly way to do it.

Thanks,

Kevin.

>>> "Barry A. Scott" <barry@scottb.demon.co.uk> 07/29/99 02:48PM >>>
How HUGE is HUGE? Can you use virtual memory to get the memory size you
need?
Limits would depend on your OS of course. Apart from LInux (limit of 128MB
swap
partition last I played) most OS seem to let you get 1GB to 3GB of VM on a
Pentium powered box.

  BArry

-----Original Message-----
From: image-sig-admin@python.org [mailto:image-sig-admin@python.org]On 
Behalf Of Kevin Cazabon
Sent: Friday, July 23, 1999 8:28 PM
To: image-sig@python.org 
Subject: [Image-SIG] Creating HUGE images...


I'm trying to develop an easy method to create images much larger than the
memory
available on the host computer, and have one big question:

-Is there any way to create a NEW image on the hard drive (with blank
background)
without first creating it in memory?  This way, I can create the 'canvas' as
large as
I want, and paste in small chunks of data manually as I go, staying within
the memory
limits of the machine.  (Writing to an existing file shouldn't be a problem,
just
creating the blank file in the first place is causing me problems)

I know I can read small sections of an image file at a time, using Fred's
earlier
suggestion of modifying the .tile attribute.  What I really need now is same
thing
for writing to a file.

Thanks,

Kevin Cazabon.











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