From d.vanderelst at tue.nl  Thu Aug  2 10:42:55 2007
From: d.vanderelst at tue.nl (Dieter Vanderelst)
Date: Thu, 02 Aug 2007 10:42:55 +0200
Subject: [Image-SIG] Mexican hat or difference of gaussians
Message-ID: <46B1990F.6040105@tue.nl>

Hi,

Could somebody point me to a way in which I could apply a Mexican hat 
filter to an image (with a controllable width)? Does somebody know of a 
piece of code floating around that can do this and that is compatible 
with PIL?

Or, in absence of this, could somebody tell me how I can do Gaussian 
blurring (with a controllable width). I can approximate the Mexican hat 
with a DOG. I found the pil_usm module. But this is not compiled for 
python > 2.1 (I use 2.5).

Greetings,
Dieter


From peter.mowry at amd.com  Thu Aug  2 20:57:26 2007
From: peter.mowry at amd.com (Mowry, Peter)
Date: Thu, 2 Aug 2007 13:57:26 -0500
Subject: [Image-SIG] Building Windows64 (64-bit AMD64) PIL (???)
In-Reply-To: <1184988378.6828.25.camel@localhost>
References: <Pine.LNX.4.44.0707201657560.1341-100000@violet.rahul.net>
	<1184988378.6828.25.camel@localhost>
Message-ID: <475F4CA05E4E1B46A7213674E70EFA620340F9A5@SAUSEXMB2.amd.com>

I am trying to build PIL for Win64 (x64, AMD64) (I am using Vista 64-bit).  Appended are my notes on how I built and tested it (and the error messages).  Any information on building a python Windows x64 extension (especially PIL) would help.  Thanks

---------------

This is essential b/c I am using python ctypes to control a 64-bit dll (and ctypes must be 64-bit to do this, which means the python install must be 64-bit, which means the PIL install must be 64-bit).  I am trying to build a binary compatible PIL with my (python for x64, on windows vista) install.

http://docs.python.org/dist/module-distutils.msvccompiler.html
Says that I should use the "Platform SDK" to compile Windows AMD64 extensions.  So I installed "Microsoft Windows SDK", and compiled from the console x64 console.  I tried both consoles (Release , default Debug):
C:\Windows\System32\cmd.exe /E:ON /V:ON /T:0E /K "C:\Program Files\Microsoft SDKs\Windows\v6.0\Bin\SetEnv.Cmd"
C:\Windows\System32\cmd.exe /E:ON /V:ON /T:0E /K "C:\Program Files\Microsoft SDKs\Windows\v6.0\Bin\SetEnv.Cmd" /x64 /Release

I downloaded code for jpeg-6b, and compiled:
* rename jconfig.vc to jconfig.h
* nmake /f Makefile.vc

I downloaded code for zlib123 (png/zip support), and compiled:
* nmake /f win32/Makefile.msc

These folders I put in "PIL\Imaging-1.1.6\libs_External\jpeg-6b" and "PIL\Imaging-1.1.6\libs_External\zlib123"

I edited Imaging-1.1.6\setup.py:
* os.environ['DISTUTILS_USE_SDK'] = "1"
* os.environ['MSSdk'] = "1"
* JPEG_ROOT = r"libs_External\jpeg-6b"
* ZLIB_ROOT = r"libs_External\zlib123"

I compiled with distutils:
* setup.py clean
* setup.py build_ext -i
* setup.py build
* setup.py install

I ran "selftest.py" and I get the error:
Traceback (most recent call last):
  File "C:\Downloads\Installs\python\PIL\Imaging-1.1.6\selftest.py", line 11, in <module>
    import ImageMath
  File "PIL\ImageMath.py", line 19, in <module>
    import _imagingmath
ImportError: DLL load failed: A dynamic link library (DLL) initialization routine failed.

I also tried to run python:
>>> from PIL import Image
>>> refImg = Image.open(r"sample.png")
>>> refImg.getpixel((0,0))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "PIL\Image.py", line 922, in getpixel
    self.load()
  File "PIL\ImageFile.py", line 155, in load
    self.load_prepare()
  File "PIL\PngImagePlugin.py", line 339, in load_prepare
    ImageFile.ImageFile.load_prepare(self)
  File "PIL\ImageFile.py", line 223, in load_prepare
    self.im = Image.core.new(self.mode, self.size)
  File "PIL\Image.py", line 36, in __getattr__
    raise ImportError("The _imaging C module is not installed")
ImportError: The _imaging C module is not installed

Neither of my dll (_imaging.pyd and _imagingmath.pyd) files are getting loaded properly by python :-(


From jeffmess at gmail.com  Thu Aug  2 12:18:30 2007
From: jeffmess at gmail.com (Jeff van Aswegen)
Date: Thu, 2 Aug 2007 12:18:30 +0200
Subject: [Image-SIG] Converting tiff to PNG
Message-ID: <3ad7a1e40708020318h45239f06o4d4f9f73ec5b956e@mail.gmail.com>

Hi there

I've written a script which converts around 20000 TIFF images to PNG images
everyday. The PIL module takes to long and I'm therefore using Imagemagick
to perform the conversion. My problem is I need to compress the tiff as much
as possible. The best I can do is get a 60kb TIFF Image to around a 100kb
PNG image. I can get it down an extra kb or 2 by running it through PNGCrush
but this takes way too long. The best command I can come up with is

convert img.tif -monochrome +matte -depth 8 -quality 100 img.png

-rw-r--r-- 1 jeffreyva jeffreyva 59328 2007-08-02 12:09 img.tif
jeffreyva at jeffrey:$ time convert img.tif -monochrome +matte -depth 8
-quality 100 img.png

real    0m7.041s
user    0m6.664s
sys     0m0.160s

-rw-r--r-- 1 jeffreyva jeffreyva 99340 2007-08-02 12:10 img.png

Has anyone worked with any utilities or has been successful in converting a
TIFF image to a PNG which is almost the same size as the original TIFF?
Look forward to hearing from anyone.

Thanks

Jeffrey van Aswegen
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From jeffmess at gmail.com  Fri Aug  3 13:19:11 2007
From: jeffmess at gmail.com (Jeff van Aswegen)
Date: Fri, 3 Aug 2007 13:19:11 +0200
Subject: [Image-SIG] Image-SIG - Convert Tif to PNG
Message-ID: <3ad7a1e40708030419w6e7b8302m828b8cc57165c2c0@mail.gmail.com>

Hi there

I've written a script which converts around 20000 TIFF images to PNG images
everyday. The PIL module takes to long and I'm therefore using Imagemagick
to perform the conversion. My problem is I need to compress the tiff as much
as possible. The best I can do is get a 60kb TIFF Image to around a 100kb
PNG image. I can get it down an extra kb or 2 by running it through PNGCrush
but this takes way too long. The best command I can come up with is

convert img.tif -monochrome +matte -depth 8 -quality 100 img.png

-rw-r--r-- 1 jeffreyva jeffreyva 59328 2007-08-02 12:09 img.tif
jeffreyva at jeffrey:$ time convert img.tif -monochrome +matte -depth 8
-quality 100 img.png

real    0m7.041s
user    0m6.664s
sys     0m0.160s

-rw-r--r-- 1 jeffreyva jeffreyva 99340 2007-08-02 12:10 img.png

Has anyone worked with any utilities or has been successful in converting a
TIFF image to a PNG which is almost the same size as the original TIFF?
Look forward to hearing from anyone.

Thanks

Jeffrey van Aswegen
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From jeffmess at gmail.com  Fri Aug  3 13:28:29 2007
From: jeffmess at gmail.com (Jeff van Aswegen)
Date: Fri, 3 Aug 2007 13:28:29 +0200
Subject: [Image-SIG]  - Convert Tif to PNG
Message-ID: <3ad7a1e40708030428j4d30f7e5va13371ab93b9eea9@mail.gmail.com>

Hi there

I've written a script which converts around 20000 TIFF images to PNG images
everyday. The PIL module takes to long and I'm therefore using Imagemagick
to perform the conversion. My problem is I need to compress the tiff as much
as possible. The best I can do is get a 60kb TIFF Image to around a 100kb
PNG image. I can get it down an extra kb or 2 by running it through PNGCrush
but this takes way too long. The best command I can come up with is

convert img.tif -monochrome +matte -depth 8 -quality 100 img.png

-rw-r--r-- 1 jeffreyva jeffreyva 59328 2007-08-02 12:09 img.tif
jeffreyva at jeffrey:$ time convert img.tif -monochrome +matte -depth 8
-quality 100 img.png

real    0m7.041s
user    0m6.664s
sys     0m0.160s

-rw-r--r-- 1 jeffreyva jeffreyva 99340 2007-08-02 12:10 img.png

Has anyone worked with any utilities or has been successful in converting a
TIFF image to a PNG which is almost the same size as the original TIFF?
Look forward to hearing from anyone.

Thanks

Jeffrey van Aswegen
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From michele.petrazzo at unipex.it  Sat Aug  4 10:49:24 2007
From: michele.petrazzo at unipex.it (Michele Petrazzo - Unipex srl)
Date: Sat, 04 Aug 2007 10:49:24 +0200
Subject: [Image-SIG] - Convert Tif to PNG
In-Reply-To: <3ad7a1e40708030428j4d30f7e5va13371ab93b9eea9@mail.gmail.com>
References: <3ad7a1e40708030428j4d30f7e5va13371ab93b9eea9@mail.gmail.com>
Message-ID: <46B43D94.7000801@unipex.it>

Jeff van Aswegen wrote:
> Hi there
> 
Hi,

(why wrote 3 messages to the list?)

<-cut->

At least, I think, you have to send us a tiff sample for make some test!
We can't help you without a sample where work!

Bye,
Michele
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From jwt at onjapan.net  Sun Aug  5 11:44:15 2007
From: jwt at onjapan.net (Jim Tittsler)
Date: Sun, 5 Aug 2007 21:44:15 +1200
Subject: [Image-SIG] PIL Jpeg resizing in windows
In-Reply-To: <3d7d5c150707291234t20feae14u62a782f53f2224c@mail.gmail.com>
References: <3d7d5c150707291234t20feae14u62a782f53f2224c@mail.gmail.com>
Message-ID: <9037C05D-20A6-42E3-A721-EACF6CDB2022@onjapan.net>

On Jul 30, 2007, at 07:34, Neil Johnson wrote:

> I am new to using PIL and trying to find out how to resize JPEG  
> images.  I try to resize, and I always get a "pixel access" error  
> using the thumbnail, resize, or load functions.  Do I need to build  
> the PIL from source in order to have JPEG resizing capability?

No.

How large is your source image?

> infile = "image1.JPG"
> PicMaxHeight = 128

Not related to your problem... but you probably will want to do  
floating point division.

> im = Image.open(infile)
> im.load()
> file, ext = os.path.splitext(infile)
> ActualSize = im.size
> heightScale = ActualSize[1]/PicMaxHeight
> scaleFactor = heightScale
> newSize = ActualSize[0]/scaleFactor, ActualSize[1]/scaleFactor
>
> ## Now let's try resizing...cross your fingers!
> im.resize(newSize)

Note that the resize() method returns a resized *copy* of the image.   
It does not modify the original.

it = im.resize(newSize)
it.save('image1_thumb.jpg')



-- 
Jim Tittsler     http://www.OnJapan.net/      GPG: 0x01159DB6
Python Starship  http://Starship.Python.net/crew/jwt/
Mailman IRC      irc://irc.freenode.net/#mailman




From ph.mignon at free.fr  Sun Aug  5 09:50:39 2007
From: ph.mignon at free.fr (ph.mignon)
Date: Sun, 5 Aug 2007 09:50:39 +0200
Subject: [Image-SIG] PIL cannot install on a Intel iMac OX 10.4.10 system
Message-ID: <3F436A4A-20E9-452C-A1A7-57CC317EFCA5@free.fr>

Hello Python Image SIG people,

this is a bug report : PIL cannot install on a Intel iMac OX 10.4.10  
system :

nor75-19-82-244-48-119:~/Desktop/Imaging-1.1.6 $ python setup.py  
build_ext -irunning build_ext
--- using frameworks at /Library/Frameworks
building '_imagingft' extension
gcc -arch i386 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -g  
-bundle -undefined dynamic_lookup build/temp.macosx-10.3-fat-2.5/ 
_imagingft.o -L/opt/local/lib -L/usr/local/lib -L/Library/Frameworks/ 
Python.framework/Versions/2.5/lib -L/usr/lib -lfreetype -o PIL/ 
_imagingft.so
/usr/bin/ld: for architecture ppc
/usr/bin/ld: warning /opt/local/lib/libfreetype.dylib cputype (7,  
architecture i386) does not match cputype (18) for specified -arch  
flag: ppc (file not loaded)
/usr/bin/ld: for architecture i386
/usr/bin/ld: warning can't open dynamic library: /Developer/SDKs/ 
MacOSX10.4u.sdk/opt/local/lib/libz.1.dylib referenced from: /opt/ 
local/lib/libfreetype.dylib (checking for undefined symbols may be  
affected) (No such file or directory, errno = 2)
/usr/bin/ld: Undefined symbols:
_inflate referenced from libfreetype expected to be defined in /opt/ 
local/lib/libz.1.dylib
_inflateEnd referenced from libfreetype expected to be defined in / 
opt/local/lib/libz.1.dylib
_inflateInit2_ referenced from libfreetype expected to be defined in / 
opt/local/lib/libz.1.dylib
_inflateReset referenced from libfreetype expected to be defined in / 
opt/local/lib/libz.1.dylib
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccDCcAX5.out (No such file or  
directory)
error: command 'gcc' failed with exit status 1

I do not know how to deal with that problem.

Thank you for helping me

Philippe Mignon
ph.mignon at free.fr



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From Chris.Barker at noaa.gov  Mon Aug  6 21:06:27 2007
From: Chris.Barker at noaa.gov (Christopher Barker)
Date: Mon, 06 Aug 2007 12:06:27 -0700
Subject: [Image-SIG] Converting tiff to PNG
In-Reply-To: <3ad7a1e40708020318h45239f06o4d4f9f73ec5b956e@mail.gmail.com>
References: <3ad7a1e40708020318h45239f06o4d4f9f73ec5b956e@mail.gmail.com>
Message-ID: <46B77133.30803@noaa.gov>

Jeff van Aswegen wrote:
> convert img.tif -monochrome +matte -depth 8 -quality 100 img.png

This looks like you've got an 8-bit monochrome tiff.

 From a quick glance at:

http://www.w3.org/TR/REC-png-multi.html

it looks like PNG should support that, but it is mostly used for 24bit 
RGB and 32bit RGBA. I'm guessing that perhaps you're getting an RGB PNG, 
which would explain why it's larger than the Tiff.

It does seem like the flags you're passing into convert should be doing 
this right, but I'd check to see if they are.

You might see what PIL gives you, making sure you use the 'L' mode (8 
bit greyscale)

-Chris



-- 
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R            (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chris.Barker at noaa.gov

From jcupitt at gmail.com  Mon Aug  6 23:02:16 2007
From: jcupitt at gmail.com (jcupitt at gmail.com)
Date: Mon, 6 Aug 2007 22:02:16 +0100
Subject: [Image-SIG] Converting tiff to PNG
In-Reply-To: <3ad7a1e40708020318h45239f06o4d4f9f73ec5b956e@mail.gmail.com>
References: <3ad7a1e40708020318h45239f06o4d4f9f73ec5b956e@mail.gmail.com>
Message-ID: <522c6460708061402j751bcecpf89eda888f395161@mail.gmail.com>

On 8/2/07, Jeff van Aswegen <jeffmess at gmail.com> wrote:
> Has anyone worked with any utilities or has been successful in converting a
> TIFF image to a PNG which is almost the same size as the original TIFF?
> Look forward to hearing from anyone.

Hi, could you post a sample image somewhere? I could have a go for you.

John

From messier at indiana.edu  Tue Aug  7 08:04:52 2007
From: messier at indiana.edu (Mark Messier)
Date: Tue, 7 Aug 2007 02:04:52 -0400
Subject: [Image-SIG] equalize algorithm for mode I;16
Message-ID: <670BA002-D4AE-448C-B833-13BC6535DB9C@indiana.edu>

Hi All,

Does anyone have an implementation of the equalize algorithm for 16- 
bit black-and-white images? The ImageOp.equalize() function does not  
support I;16 (at least I've not made it work using PIL 1.1.6) and my  
attempts to implement the algorithm have all failed when I try to to  
put the equalized pixel data back to the image. The failures are all  
sort of interesting: some fill only the left half of the image, some  
ignore every other row. These failures make me think that this is  
something to do with errors in mapping pixel to memory location for 8- 
bit vs. 16-bit images. I've tried im.putdata(...), Image.frombuffer 
(...), Image.fromstring(...), im.point(...), and pix = im.load(); pix 
[i,j] = h[pix[i,j]] and all produce one of the behaviors I mention  
above.

BTW, I've been able to confirm that my algorithm works by printing  
the pixel data to a file and using a separate plotting program to  
construct the image from the text data. So, I'm confident that its  
just the last packing stage where my problem lies.

Any help would be greatly appreciated.

Cheers,
Mark
========================================================================
Mark Messier                                         messier at indiana.edu
Department of Physics            http://www.physics.indiana.edu/~messier
Indiana University                                 Phone: (812) 855-0236
Bloomington, IN 47405                                Fax: (812) 855-0440




From vamurthy at cisco.com  Tue Aug  7 08:33:34 2007
From: vamurthy at cisco.com (Varun Murthy (vamurthy))
Date: Tue, 7 Aug 2007 12:03:34 +0530
Subject: [Image-SIG] ld error with Imaging 1.1.6
Message-ID: <14F212591546FF4AB98EBFB4D189F061035B5745@xmb-blr-411.apac.cisco.com>

Hi, 
  Im trying to install the Imaging Library for Python (Imaging-1.1.6) on
Solaris 5.9.When i run the python setup.py install command the
installation procedure ends with the following error. 

ld: fatal: relocations remain against allocatable but non-writable
sections 
collect2: ld returned 1 exit status 
error: command 'gcc' failed with exit status 1 

Is this happening because SUN ld is being used rather than GNU ld? 

I installed the binutils 1.7.11 package which contains GNU ld.Is
installing this package sufficient to make gcc use GNU ld rather than
SUN ld? 

Any help regarding this would be appreciated. 

The details of the packages installed are 

   a)python 2.4.3 
   b)gcc 3.2 
   c)jpeg 6b
   d)zlib 1.2.3
 
I want Imaging 1.1.6 to be installed to be used with Plone 2.5.


Thanks, 
    Varun 
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From vamurthy at cisco.com  Tue Aug  7 09:18:11 2007
From: vamurthy at cisco.com (Varun Murthy (vamurthy))
Date: Tue, 7 Aug 2007 12:48:11 +0530
Subject: [Image-SIG] ld error with Imaging 1.1.6 on Solaris 5.9
Message-ID: <14F212591546FF4AB98EBFB4D189F061035B5773@xmb-blr-411.apac.cisco.com>

Hi, 
  Im trying to install the Imaging Library for Python (Imaging-1.1.6) on
Solaris 5.9.When i run the python setup.py install command the
installation procedure ends with the following error. 

ld: fatal: relocations remain against allocatable but non-writable
sections 
collect2: ld returned 1 exit status 
error: command 'gcc' failed with exit status 1 

Is this happening because SUN ld is being used rather than GNU ld? 

I installed the binutils 1.7.11 package which contains GNU ld.Is
installing this package sufficient to make gcc use GNU ld rather than
SUN ld? 

Any help regarding this would be appreciated. 

The details of the packages installed are 

   a)python 2.4.3 
   b)gcc 3.2 
   c)jpeg 6b
   d)zlib 1.2.3
 
I want Imaging 1.1.6 to be installed to be used with Plone 2.5.


Thanks, 
    Varun 
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From cja at gmx.net  Sun Aug 12 14:18:54 2007
From: cja at gmx.net (Jonas Aaberg)
Date: Sun, 12 Aug 2007 14:18:54 +0200
Subject: [Image-SIG] PATCH: Palette fix for FLI/FLC animations.
Message-ID: <op.twx4hsfgqvqtrx@lanfear>


Hi everyone,

PIL assumes that the palette is always the first frame in FLI/FLC  
animations. However,
this is not always the case. (For example, trying to load a FLC animations  
 from
Civlization III results in the usage of the PIL default grayscale palette.)
After having a look at some FLI/FLC documentation I did some small changes  
to
FliImagePlugin.py and managed to get the palette correctly loaded.
Please see the attached patch.

Best regards,
  Jonas ?berg
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From cardona at ucla.edu  Tue Aug 14 01:06:00 2007
From: cardona at ucla.edu (Albert Cardona)
Date: Mon, 13 Aug 2007 19:06:00 -0400
Subject: [Image-SIG] creating multiframe images
Message-ID: <46C0E3D8.6050501@ucla.edu>


Is there anyway to create mutliframe images? I have no problem in 
reading multitif with seek() and so on, but how to create them? merge() 
is only for multiband images, not multiframe.

Thanks for any help.

Albert

-- 
Albert Cardona
http://www.mcdb.ucla.edu/Research/Hartenstein/acardona


From d.vanderelst at tue.nl  Tue Aug 14 16:23:00 2007
From: d.vanderelst at tue.nl (Dieter Vanderelst)
Date: Tue, 14 Aug 2007 16:23:00 +0200
Subject: [Image-SIG] pil_usm for python 2.5?
Message-ID: <46C1BAC4.6010802@tue.nl>

Hi list,

Does anybody have a version of pil_usm (module for gaussian blurring) 
that is compiled for Python 2.5?

Regards,
Dieter

-- 
Dieter Vanderelst
d.vanderelst at tue.nl
Department of Industrial Design
Designed Intelligence

From jzshao1 at gmail.com  Tue Aug 14 04:08:56 2007
From: jzshao1 at gmail.com (Jonathan Shao)
Date: Mon, 13 Aug 2007 22:08:56 -0400
Subject: [Image-SIG] Newbie question on color detection and tracking
Message-ID: <f42d5c6f0708131908n2862bd07u909c149f32f9e68e@mail.gmail.com>

I'm a relative newbie when it comes to image processing, so please bear with
me...

What I want to do is to set up a static camera such that it can track the
motion of a person wearing a particular color marker walking around in an
interior room (no windows). The "color marker" can be something like a
t-shirt with a unique color distinctly different from the background, and I
think I'll need to take periodic snap-shots of the room to simulate
real-time tracking as closely as possible. In effect, it's a simplified
scenario for person tracking.

For now, I'm just trying to get the color detection part of my project
working. I think I should be to just do a simple background subtraction
between a snapshot by the camera and a reference image of the background,
and that should be able to give me good color detection. The issues I'm
concerned with:

a) Do I need to worry about different hues/illuminations of the same color?

b) Is this a realistic method to implement with the PIL, or would I have to
deal with issues of speed while trying to track the marker?

-- 
"Perhaps we all give the best of our hearts uncritically, to those who
hardly think about us in return."
~ T.H.White
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From newz at bearfruit.org  Wed Aug 15 21:41:32 2007
From: newz at bearfruit.org (Matthew Nuzum)
Date: Wed, 15 Aug 2007 14:41:32 -0500
Subject: [Image-SIG] Newbie question on color detection and tracking
In-Reply-To: <f42d5c6f0708131908n2862bd07u909c149f32f9e68e@mail.gmail.com>
References: <f42d5c6f0708131908n2862bd07u909c149f32f9e68e@mail.gmail.com>
Message-ID: <f3c0b4080708151241p6b994346nec7700d08ceef6c5@mail.gmail.com>

Some people on this list will undoubtably have really awesome ideas
for you on how you can use python to do this. Here are some ideas I've
had in exploring this concept in the past (I created a dual camera 3d
vision system a while ago)...

One idea, and probably the best of the bunch, is to use a physical
filter to limit the number of colors you receive. (Maybe you could do
this in software as well, my cameras had a software controllable hue
adjustment that allowed me to apply the filter without needing to use
a physical filter or pre-process the image to apply the filter)

Once you've got a range of values from black to whatever your filter
color is, you can then find the largest section of the frame whose
colors are far from black.

As a possibility, you may find it easier to process the image one axis
at a time. For example, assuming your image was only 8 pixels wide by
8 pixels high,
[
[0,0,0,0,0,0,0,0],
[0,0,0,2,2,0,0,0],
[0,0,2,7,7,2,0,0],
[0,2,5,9,9,4,2,0],
[0,0,2,7,7,2,0,0],
[0,0,0,2,2,0,0,0],
[0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0]
]

You could then average each column to find the x position which gives you

0, 0.25, 1.13, 3.38, 3.38, 1, 0.25, 0 meaning the colored item is at
location (zero based) 3 or 4 (or 3.5).

Then average each row to find the y axis which is
0, 0.5, 2.25, 3.88, 2.25, 0.5, 0, 0 meaning the colored item is at
location 3, giving you a coordinate of x=3.5, y=3.

I'll admit that going into my project I knew very little about Python,
so I probably could now do it much better. The biggest problem with my
system was that my camera, which could normally do 12 to 15 frames per
second could only process the stereo images at 1.5 - 2.5 frames per
second.

I say "camera could only process..." but I mean the software/camera combination.

I ended up spending a lot more time trying to make the motion fluid
from a 2 fps image stream. It ended up working very well though. :-)
It was a big learning curve project for me, since my cameras could
only work together in Linux (In Windows, the camera driver had a bug
allowing only one at a time), so I had to learn some kernel driver
hacking in order to enable the hue adjustment, then video4linux, then
image processing, then the graphics toolkit to display the images.

On 8/13/07, Jonathan Shao <jzshao1 at gmail.com> wrote:
> I'm a relative newbie when it comes to image processing, so please bear with
> me...
>
> What I want to do is to set up a static camera such that it can track the
> motion of a person wearing a particular color marker walking around in an
> interior room (no windows). The "color marker" can be something like a
> t-shirt with a unique color distinctly different from the background, and I
> think I'll need to take periodic snap-shots of the room to simulate
> real-time tracking as closely as possible. In effect, it's a simplified
> scenario for person tracking.
>
> For now, I'm just trying to get the color detection part of my project
> working. I think I should be to just do a simple background subtraction
> between a snapshot by the camera and a reference image of the background,
> and that should be able to give me good color detection. The issues I'm
> concerned with:
>
> a) Do I need to worry about different hues/illuminations of the same color?
>
> b) Is this a realistic method to implement with the PIL, or would I have to
> deal with issues of speed while trying to track the marker?
>
> --
> "Perhaps we all give the best of our hearts uncritically, to those who
> hardly think about us in return."
> ~ T.H.White
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig
>
>


-- 
Matthew Nuzum
newz2000 on freenode

From adam.naples at yale.edu  Wed Aug 15 21:16:58 2007
From: adam.naples at yale.edu (adam naples)
Date: Wed, 15 Aug 2007 15:16:58 -0400
Subject: [Image-SIG] Newbie question on color detection and tracking
In-Reply-To: <f42d5c6f0708131908n2862bd07u909c149f32f9e68e@mail.gmail.com>
References: <f42d5c6f0708131908n2862bd07u909c149f32f9e68e@mail.gmail.com>
Message-ID: <EF1FE506-2092-4059-86D1-88330D04B7DB@yale.edu>

a) yes, a lot,
b) I don't think PIL is the way to go, use openCV, you can use it  
with python.
http://sourceforge.net/projects/opencvlibrary/

c) computer vision is hard, but it sounds like you're talking about a  
very basic optitrack (maybe? I have no idea). I've not used them but  
remember to think about what will happen if the user occludes the  
color or t-shirt. Another  reason this is hard is that the  shadows  
and illumination will change a lot from frame to frame, so a  
background substitution will be hard even if the person is in a grey  
room with no furniture or wall decorations, they'll still cast  
shadows. My suggestion, that may make your life a lot easier is to  
install open cv and run the python lucas-kanade demo. it will capture  
frames from a camera, and you click the feature that you want it to  
track, if the conditions are good, it tracks it, and can do a pretty  
good job; even with multiple features.


http://www.naturalpoint.com/optitrack/
hope this helps
-a

On Aug 13, 2007, at 10:08 PM, Jonathan Shao wrote:

> I'm a relative newbie when it comes to image processing, so please  
> bear with me...
>
> What I want to do is to set up a static camera such that it can  
> track the motion of a person wearing a particular color marker  
> walking around in an interior room (no windows). The "color marker"  
> can be something like a t-shirt with a unique color distinctly  
> different from the background, and I think I'll need to take  
> periodic snap-shots of the room to simulate real-time tracking as  
> closely as possible. In effect, it's a simplified scenario for  
> person tracking.
>
> For now, I'm just trying to get the color detection part of my  
> project working. I think I should be to just do a simple background  
> subtraction between a snapshot by the camera and a reference image  
> of the background, and that should be able to give me good color  
> detection. The issues I'm concerned with:
>
> a) Do I need to worry about different hues/illuminations of the  
> same color?
>
> b) Is this a realistic method to implement with the PIL, or would I  
> have to deal with issues of speed while trying to track the marker?
>
> -- 
> "Perhaps we all give the best of our hearts uncritically, to those  
> who hardly think about us in return."
> ~ T.H.White
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig

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From dblank at brynmawr.edu  Sat Aug 18 05:56:54 2007
From: dblank at brynmawr.edu (Douglas S. Blank)
Date: Fri, 17 Aug 2007 23:56:54 -0400 (EDT)
Subject: [Image-SIG] Moving from Image to Tkinter.PhotoImage
Message-ID: <13486.71.59.123.159.1187409414.squirrel@webmail.brynmawr.edu>

image-sig,

I have an image that I have constructed from an array, and need to end up
as a Tkinter.PhotoImage and I am a little confused as to how I get there.

I have this working:

self.array = array([0] * (height * width * 3), 'B')
image = Image.frombuffer("RGB", (self.width, self.height), self.array,
                         "raw", "RGB", 0, 1)

but I need to end up with something equivalent to this kind of object:

pim = Tkinter.PhotoImage(file=filename)

I've tried ImageTk.PhotoImage(image) and other conversions, but I don't
get an object with fields and methods like 'blank', 'cget', 'config',
'configure', 'copy', 'get', 'height', 'name', 'put', 'subsample', 'tk',
'type', 'width', 'write', and 'zoom'.

What will turn image into a pim?

Any hints appreciated,

-Doug

-- 
Douglas S. Blank
Associate Professor, Bryn Mawr College
http://cs.brynmawr.edu/~dblank/
Office: 610 526 6501


From bbaxter at wadsworth.org  Mon Aug 20 14:15:24 2007
From: bbaxter at wadsworth.org (William Baxter)
Date: Mon, 20 Aug 2007 08:15:24 -0400
Subject: [Image-SIG] SGI format
Message-ID: <46C985DC.F393DA00@wadsworth.org>

Does anyone have any experience with the SGI RGB format? The PIL
documentation says SGI images are 'read only'. Image does open them, but
then it seems you can't get at the data. Any convert, copy, getpixel
commands give an error:

    raise IOError("decoder %s not available" % decoder_name)
IOError: decoder sgi_rle not available

Thanks,
Bill B

-- 
William T. Baxter, Ph.D.
Wadsworth Center
Empire State Plaza, PO Box 509
Albany, NY 12201-0509


IMPORTANT NOTICE: This e-mail and any attachments may contain
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from someone who was not authorized to send it to you, please do not
distribute, copy or use it or any attachments.  Please notify the
sender immediately by reply e-mail and delete this from your
system. Thank you for your cooperation.



From connellybarnes at yahoo.com  Mon Aug 20 23:24:46 2007
From: connellybarnes at yahoo.com (Connelly Barnes)
Date: Mon, 20 Aug 2007 14:24:46 -0700 (PDT)
Subject: [Image-SIG] Confirmation of bug compiling PIL and request that GIF
	patch be applied
Message-ID: <85052.72320.qm@web54304.mail.re2.yahoo.com>


Hi,

1. Confirming a bug in PIL compilation with Mingw on Windows

I tried to compile PIL on Windows XP with Mingw.  Compiling with the Python 2.5.1 binary obtained
from the python.org site (which is compiled via Visual Studio .NET 2003) I obtained the same error
that Michael Gross obtained:

  http://mail.python.org/pipermail/image-sig/2006-April/003854.html

Following Fredrik Lundh's suggestion that this may be caused by a conflict in the runtime library
that is linked against I installed an unofficial Mingw variant that allows several different
"Microsoft Visual Studio" runtimes to be linked against, and linked against the runtime library
that my Python binary was linked against (MSVCR71.DLL).  This did not resolve the problem; the
same error that Michael Gross reported was again obtained.

Has anyone had success building PIL 1.1.6 on Windows with Mingw?

2. Requesting that GIF reading patch be applied

Please apply the patch:

  http://www.nabble.com/Patch:-Animated-GIF-loading-t4088311.html

This fixes the animated GIF reading support in PIL.  After applying the patch, a GIF animation can
be viewed by:

for x in ImageSequence.Iterator(Image.open('x.gif')):
  x.show()

Before applying the patch, it is not at all clear how to obtain the frames of the GIF animation;
several hours of experimenting with the ImageSequence iterator and its various disposal and
transparency fields availed me naught until I applied the patch.

Thanks,
Connelly Barnes
connellybarnes.com



       
____________________________________________________________________________________
Yahoo! oneSearch: Finally, mobile search 
that gives answers, not web links. 
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From chicorbleak at gmail.com  Tue Aug 21 06:34:09 2007
From: chicorbleak at gmail.com (Chic or Bleak)
Date: Mon, 20 Aug 2007 21:34:09 -0700
Subject: [Image-SIG] Partial blur
Message-ID: <6d2cfbd40708202134q644e0ba8j3801e548ce3ce90@mail.gmail.com>

Hello,

How would I go about blurring an oval-shaped part of my picture,
instead of the whole thing? I couldn't find a way to do this using the
tools I see in the API.

Thanks
CB

From dblank at brynmawr.edu  Wed Aug 22 02:15:14 2007
From: dblank at brynmawr.edu (Douglas S. Blank)
Date: Tue, 21 Aug 2007 20:15:14 -0400
Subject: [Image-SIG] Moving from Image to Tkinter.PhotoImage
In-Reply-To: <13486.71.59.123.159.1187409414.squirrel@webmail.brynmawr.edu>
References: <13486.71.59.123.159.1187409414.squirrel@webmail.brynmawr.edu>
Message-ID: <46CB8012.2020707@brynmawr.edu>

Never mind. It looks like the problem I was having was based on some 
code running with one Tk() interpreter, and some other code running in 
another. This can happen fairly easily and cause problems in IDLE when 
run with subprocesses. The solution was to make sure that objects 
created (whether in the shell or in code) use the same root.

-Doug

Douglas S. Blank wrote:
> image-sig,
> 
> I have an image that I have constructed from an array, and need to end up
> as a Tkinter.PhotoImage and I am a little confused as to how I get there.
> 
> I have this working:
> 
> self.array = array([0] * (height * width * 3), 'B')
> image = Image.frombuffer("RGB", (self.width, self.height), self.array,
>                          "raw", "RGB", 0, 1)
> 
> but I need to end up with something equivalent to this kind of object:
> 
> pim = Tkinter.PhotoImage(file=filename)
> 
> I've tried ImageTk.PhotoImage(image) and other conversions, but I don't
> get an object with fields and methods like 'blank', 'cget', 'config',
> 'configure', 'copy', 'get', 'height', 'name', 'put', 'subsample', 'tk',
> 'type', 'width', 'write', and 'zoom'.
> 
> What will turn image into a pim?
> 
> Any hints appreciated,
> 
> -Doug
> 


From peter.mowry at amd.com  Fri Aug 24 00:13:59 2007
From: peter.mowry at amd.com (Mowry, Peter)
Date: Thu, 23 Aug 2007 17:13:59 -0500
Subject: [Image-SIG] Build PIL (python imaging library) in Debug mode (win64,
	AMD64)
In-Reply-To: <46CB8012.2020707@brynmawr.edu>
References: <13486.71.59.123.159.1187409414.squirrel@webmail.brynmawr.edu>
	<46CB8012.2020707@brynmawr.edu>
Message-ID: <C7791E7B4FFB1B4E8479A62E74846FA41C2383@SAUSEXMB2.amd.com>

I want to - Build PIL (python imaging library) in Debug mode (win64,
AMD64)

I built python2.5.1 using visual studios (for win64, AMD64)
(python_d.exe, etc).  For other extension modules, such as ctypes, I
just ran "python_d.exe setup.py", and setup.py automatically chose to
build ctypes_d.pyd (in debug mode).

But for PIL, I ran "python_d.exe setup.py", and it still tries to build
_imgaging.pyd (not _imaging_d.pyd - debug).  It looks for python25.lib
(instead of python25_d.lib).

How can I tell PIL to build me a python debug extension (using my custom
build of python2.5.1 debug python_d.exe) instead of a python release
extension?

Thanks



-----------



4) build Python Imaging Library (for "import PIL")
  * our source has unmodified zlib123 (zlib 1.2.3) (from
http://www.zlib.net/) source (for zip / png support)
  * our source has unmodified ijg jpeg library (for jpeg support) (from
http://www.ijg.org/files/jpegsrc.v6b.tar.gz)

  a) Edit setup.py:
    # see http://docs.python.org/dist/module-distutils.msvccompiler.html
    os.environ['DISTUTILS_USE_SDK'] = "1"
    os.environ['MSSdk'] = "1"
    
    # see
http://www.wiredfool.com/2005/10/29/how-to-build-the-python-imaging-libr
ary-for-windows/
    FREETYPE_ROOT = None
    JPEG_ROOT = "jpeg-6b"
    TIFF_ROOT = None
    ZLIB_ROOT = "zlib-1.2.3"
    TCL_ROOT = None
    
    # ignore tkinter support since it wasn't working and I just want png
support
    # this step was not necessary for my build, but may be for some
scenarios
    #import _tkinter
    import _tkinter_I_am_not_really_Importing_it

  b) open "Visual Studio 2005 x64 Win64 Command Prompt"

  c) build jpeg dependency:
    cd Imaging-1.1.6\jpeg-6b
    copy jconfig.vc jconfig.h
    nmake /f makefile.vc

  d) build zlib dependency
    cd Imaging-1.1.6\zlib-1.2.3
    nmake /f win32/Makefile.msc

  e) build PIL
    cd Imaging-1.1.6\
    ..\Build_Win64\python.exe setup.py build

TODO: - paths???
    Again, getting setup.py to build was messy b/c I wasn't sure how to
tell setup.py where to look for the missing files (python .h files and
python25.lib),
    so I copied them to local folders in the PIL build - to hack the
build to work
      * copied headers (Python-2.5.1\Include\*.h)
(Python-2.5.1\PC\pyconfig.h) to (Imaging1.1.6\libImaging)
      * copied python25.lib to Imaging1.1.6\



From martin at v.loewis.de  Sat Aug 25 06:16:35 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 25 Aug 2007 06:16:35 +0200
Subject: [Image-SIG] [Python-Help] Build PIL (python imaging library) in
 Debug mode (win64, AMD64)
In-Reply-To: <C7791E7B4FFB1B4E8479A62E74846FA41C2383@SAUSEXMB2.amd.com>
References: <13486.71.59.123.159.1187409414.squirrel@webmail.brynmawr.edu>	<46CB8012.2020707@brynmawr.edu>
	<C7791E7B4FFB1B4E8479A62E74846FA41C2383@SAUSEXMB2.amd.com>
Message-ID: <46CFAD23.7090903@v.loewis.de>

> How can I tell PIL to build me a python debug extension (using my custom
> build of python2.5.1 debug python_d.exe) instead of a python release
> extension?

You will have to edit PIL's setup.py to support that case. Check whether
self.debug is set inside build_extension; if it is not, trace through
the code how it got lost. Check whether get_ext_filename gets invoked;
if so, trace through the code why it fails to append _d.pyd, if not,
check whether get_outputs gets invoked.

Regards,
Martin

From izakmarais at yahoo.com  Thu Aug 23 11:24:49 2007
From: izakmarais at yahoo.com (izak marais)
Date: Thu, 23 Aug 2007 02:24:49 -0700 (PDT)
Subject: [Image-SIG] Down-sampling: ANTIALIAS implementation details?
Message-ID: <724907.58164.qm@web50901.mail.re2.yahoo.com>

Hi 

Does anyone know what sort of averaging happens when down-sampling an iamge with <img>.thumbnail(<newsize>, Image.ANTIALIAS). Is it a Gaussian average of ot a block average?

Thanks in advance!
Izak Marais

       
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From izakmarais at yahoo.com  Thu Aug 23 11:35:24 2007
From: izakmarais at yahoo.com (izak marais)
Date: Thu, 23 Aug 2007 02:35:24 -0700 (PDT)
Subject: [Image-SIG] Down-sampling: ANTIALIAS implementation details?
Message-ID: <17269.68244.qm@web50909.mail.re2.yahoo.com>

Sorry, I see the documentation is quite sufficient. 

       
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From David.L.Goldsmith at noaa.gov  Sat Aug 25 22:17:11 2007
From: David.L.Goldsmith at noaa.gov (David Goldsmith)
Date: Sat, 25 Aug 2007 13:17:11 -0700
Subject: [Image-SIG] [Mac 10.4.10, Python 2.5] PIL Newbie
Message-ID: <46D08E47.1000906@noaa.gov>

Hi!  Just getting started w/ PIL.  Using the tutorial, I successfully 
got as far as opening up a png file; when I tried to "show" it, however, 
I got the following final error:

  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PIL/Image.py", 
line 391, in _getencoder
    raise IOError("encoder %s not available" % encoder_name)
IOError: encoder jpeg not available

Please help!  Thanks!

DG

-- 
ERD/ORR/NOS/NOAA <http://response.restoration.noaa.gov/emergencyresponse/>

From jwt at onjapan.net  Sun Aug 26 00:42:30 2007
From: jwt at onjapan.net (Jim Tittsler)
Date: Sun, 26 Aug 2007 10:42:30 +1200
Subject: [Image-SIG] [Mac 10.4.10, Python 2.5] PIL Newbie
In-Reply-To: <46D08E47.1000906@noaa.gov>
References: <46D08E47.1000906@noaa.gov>
Message-ID: <1F3AFB66-9CBB-4CB2-8D9D-C64B02889E97@onjapan.net>

On Aug 26, 2007, at 08:17, David Goldsmith wrote:
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ 
> site-packages/PIL/Image.py",
> line 391, in _getencoder
>     raise IOError("encoder %s not available" % encoder_name)
> IOError: encoder jpeg not available
>
> Please help!  Thanks!

It looks like you built PIL without the JPEG libraries, and so don't  
have JPEG support.  Did you try using one of the prebuilt binaries  
from http://pythonmac.org/packages/




-- 
Jim Tittsler     http://www.OnJapan.net/      GPG: 0x01159DB6
Python Starship  http://Starship.Python.net/crew/jwt/
Mailman IRC      irc://irc.freenode.net/#mailman




From David.L.Goldsmith at noaa.gov  Sun Aug 26 05:57:50 2007
From: David.L.Goldsmith at noaa.gov (David Goldsmith)
Date: Sat, 25 Aug 2007 20:57:50 -0700
Subject: [Image-SIG] [Mac 10.4.10, Python 2.5] PIL Newbie
Message-ID: <46D0FA3E.9050703@noaa.gov>

> On Aug 26, 2007, at 08:17, David Goldsmith wrote:
>>/   File
/>>/ "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ 
/>>/ site-packages/PIL/Image.py",
/>>/ line 391, in _getencoder
/>>/     raise IOError("encoder %s not available" % encoder_name)
/>>/ IOError: encoder jpeg not available
/>>/
/>>/ Please help!  Thanks!
/>
> It looks like you built PIL without the JPEG libraries, and so don't  
> have JPEG support.  Did you try using one of the prebuilt binaries  
> from http://pythonmac.org/packages/

Not yet, 'cause I didn't know they existed - 
http://www.pythonware.com/products/pil/ (which is what Google led me to) 
makes no mention of them; I built from source 'cause I thought I had 
to.  Thanks!

DG

-- 
ERD/ORR/NOS/NOAA <http://response.restoration.noaa.gov/emergencyresponse/>

From archsheep at yahoo.com.br  Sat Aug 25 22:08:04 2007
From: archsheep at yahoo.com.br (Alex Torquato S. Carneiro)
Date: Sat, 25 Aug 2007 13:08:04 -0700 (PDT)
Subject: [Image-SIG] Wavelets
Message-ID: <483587.88580.qm@web63409.mail.re1.yahoo.com>

I everyone. Anyone studies wavelets? I'm doing a project and don't find anything about Mexican Hat, Meyer and Morlet wavelets.
I can use Python, Scilab or C/C++ (prefer for 2 firsts).

Thanks, Alex.





      Flickr agora em portugu?s. Voc? clica, todo mundo v?.
http://www.flickr.com.br/
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From bldrake at adaptcs.com  Sun Aug 26 22:45:57 2007
From: bldrake at adaptcs.com (B. L. Drake)
Date: Sun, 26 Aug 2007 13:45:57 -0700 (PDT)
Subject: [Image-SIG] Wavelets
In-Reply-To: <483587.88580.qm@web63409.mail.re1.yahoo.com>
Message-ID: <102667.63428.qm@web412.biz.mail.mud.yahoo.com>

Alex,
I wrote a wavelet package for LabVIEW a number of years ago.  The code I based it on was from the Stanford Statistics dept.  They have a software package (free download at the time) written in Matlab that can be easily translated to other languages.  I had to dig around for the wavelet coefficients, which might be easier these days (perhaps automatic generation).  Here is the link to this software:

http://www-stat.stanford.edu/software/wavelab/

Hope this helps.
Barry Drake

"Alex Torquato S. Carneiro" <archsheep at yahoo.com.br> wrote: I everyone. Anyone studies wavelets? I'm doing a project and don't find anything about Mexican Hat, Meyer and Morlet wavelets.
I can use Python, Scilab or C/C++ (prefer for 2 firsts).

Thanks, Alex.




         Flickr agora em portugu?s. Voc? clica, todo mundo v?. Saiba mais. _______________________________________________
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From stefan at sun.ac.za  Tue Aug 28 17:22:15 2007
From: stefan at sun.ac.za (Stefan van der Walt)
Date: Tue, 28 Aug 2007 17:22:15 +0200
Subject: [Image-SIG] PIL.Image.fromarray broken for RGBA images
Message-ID: <20070828152215.GE14395@mentat.za.net>

Hi all,

The attached patch restructures Image.fromarray and fixes it for RGBA
images.  I hope this is the right place to post it (if not, I'd
appreciate it if you could point me in the right direction).

Regards
St?fan
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From fei.xu at rutgers.edu  Wed Aug 29 15:33:09 2007
From: fei.xu at rutgers.edu (Fei Xu)
Date: Wed, 29 Aug 2007 09:33:09 -0400
Subject: [Image-SIG] how to draw a subscript in text
Message-ID: <f61e4a341b52.46d53d55@rutgers.edu>

Hi!
Is there any module in PIL, which draws a subscript such as G0 (here 0 is a subscript) in text? If we cannot 
draw a subscript letter or number automatically, I have to change the font size and calculate the locations of 
the subscript letters thoroughly. Or if there is no subscript module, could you tell me any clever way to write a 
subscript?

Thanks!

Best,

Fei

From connellybarnes at yahoo.com  Thu Aug 30 02:39:28 2007
From: connellybarnes at yahoo.com (Connelly Barnes)
Date: Wed, 29 Aug 2007 17:39:28 -0700 (PDT)
Subject: [Image-SIG] Confirmation of bug compiling PIL and request that GIF
	patch be applied
Message-ID: <858306.86443.qm@web54304.mail.re2.yahoo.com>


> Please apply the patch:
> 
>   http://www.nabble.com/Patch:-Animated-GIF-loading-t4088311.html
> 
> This fixes the animated GIF reading support in PIL.

Here's a binary for Python 2.5 on Win32 with the GIF reading patch applied:

  http://www.connellybarnes.com/code/python/pil-1.1.6-gif-patched-py2.5-win32.zip

It includes JPG and PNG support, but not Freetype nor Tk support.

Take care, Connelly



       
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Pinpoint customers who are looking for what you sell. 
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From cardona at ucla.edu  Thu Aug 30 17:47:34 2007
From: cardona at ucla.edu (Albert Cardona)
Date: Thu, 30 Aug 2007 08:47:34 -0700
Subject: [Image-SIG] multitiff / multiframe images
In-Reply-To: <46C0E3D8.6050501@ucla.edu>
References: <46C0E3D8.6050501@ucla.edu>
Message-ID: <46D6E696.4070902@ucla.edu>


Noone is using multitiff images at all? I am surprised then that such 
functionality is kind of in PIL.

If anyone has any information related to multitiff / multiframe images, 
I'd appreciate if he'd share it.


Albert
> Is there anyway to create mutliframe images? I have no problem in 
> reading multitif with seek() and so on, but how to create them? 
> merge() is only for multiband images, not multiframe.
>   

-- 
Albert Cardona
http://www.mcdb.ucla.edu/Research/Hartenstein/acardona


From rajib.d.4u at gmail.com  Fri Aug 31 07:00:57 2007
From: rajib.d.4u at gmail.com (Rajib Das)
Date: Fri, 31 Aug 2007 10:30:57 +0530
Subject: [Image-SIG] SAP mm & pm module
Message-ID: <78f81b760708302200i726bcfd2jdcb6ff099e93a1b1@mail.gmail.com>

pl. send mail subject to SAP preferably pm & mm module.

-- 
Thanx & Regards
Rajib Das

From nickg at modp.com  Wed Aug 29 06:22:45 2007
From: nickg at modp.com (Nick Galbreath)
Date: Wed, 29 Aug 2007 00:22:45 -0400
Subject: [Image-SIG] PNG metadata, patches, etc
Message-ID: <4c95589d0708282122hc5ddd98jf60c571868c58cba@mail.gmail.com>

Hi all,

While not well advertised, PIL 1.1.6 supports reading __and writing__ of PNG
metadata.  This means, you can "tag" your images with the creation data, the
editor, the original source file, copyright information, anything.  I know,
exciting stuff.

The catch is that you can't use Image.save directly, but have to copy
metadata into a "secret" object (well _I_ didn't find it documented, maybe I
missed it) and pass that to Image.save.  (if you use Image.save directly,
all metadata is lost).

http://blog.modp.com/2007/08/python-pil-and-png-metadata-take-2.html

#
# wrapper around PIL 1.1.6 Image.save to preserve PNG metadata
#
# public domain, Nick Galbreath
# http://blog.modp.com/2007/08/python-pil-and-png-metadata-take-2.html
#
def pngsave(im, file):
    # these can be automatically added to Image.info dict
    # they are not user-added metadata
    reserved = ('interlace', 'gamma', 'dpi', 'transparency', 'aspect')

    # undocumented class
    from PIL import PngImagePlugin
    meta = PngImagePlugin.PngInfo()

    # copy from Image.info to new dict
    for k,v in im.info.iteritems():
        if k in reserved: continue
        meta.add_text(k, v, 0)

    # and save
    im.save(file, "PNG", pnginfo=meta)



Ideally, i'd love to "fix" PngImagePlugin.py to write out metadata, and/or
be able to read the zTXt chunks (especially since there is code to write
zTXt chunks).

I'm happy to work on an "official patch" -- there is more than one way to do
it and since this issue has come up a few times (see below), I'm wondering
what the right protocol is, or if it's already been done in mainline?

thanks,

--nickg

http://mail.python.org/pipermail/image-sig/2007-February/004343.html
http://mail.python.org/pipermail/image-sig/1999-May/000737.html
http://mail.python.org/pipermail/image-sig/1998-July/000529.html
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