TIFF Image conversion

[alastair]

Hi,

I need to convert a 24-bit RGB TIFF image to an 8-bit RGB TIFF image.
I've tried using PIL and the convert() method - this allowed me to
convert to an 8-bit grayscale image, close but not exactly what I need
:(

From what I've read, it doesn't look like I can do what I need in PIL.
Does anyone know of another method ?

Thanks,

Alastair.

[Larry Bates]

I think you could use netpbm to do the conversion.

http://netpbm.sourceforge.net/

I use it for a lot of my TIFF-work that PIL just
doesn't yet support. Wrap a function/class around
an os.system() call to execute it if you want to
call from Python.

HTH,
Larry Bates
Syscon, Inc.

"alastair" <al**********@yahoo.co.uk> wrote in message
news:23**************************@posting.google.c om...

Hi,

I need to convert a 24-bit RGB TIFF image to an 8-bit RGB TIFF image.
I've tried using PIL and the convert() method - this allowed me to
convert to an 8-bit grayscale image, close but not exactly what I need
:(

From what I've read, it doesn't look like I can do what I need in PIL.
Does anyone know of another method ?

Thanks,

Alastair.

[Dennis Lee Bieber]

On 12 Jul 2004 07:57:40 -0700, al**********@yahoo.co.uk (alastair)
declaimed the following in comp.lang.python:

Hi,

I need to convert a 24-bit RGB TIFF image to an 8-bit RGB TIFF image.
Pardon? The only color 8-bit formats I'm familiar with are those
using indexed color (primarily GIF, though PNG may also have that mode).
You are limited to only 256 discrete colors.

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[Jeff Shannon]

alastair wrote:

Hi,

I need to convert a 24-bit RGB TIFF image to an 8-bit RGB TIFF image.
I've tried using PIL and the convert() method - this allowed me to
convert to an 8-bit grayscale image, close but not exactly what I need
:(

With the caveat expressed above (that there may well not *be* such a
thing as an 8-bit RGB TIFF), you may want to look into using ImageMagick
(and the Python API for it) for your image manipulation. See
www.imagemagick.org for more information.

Jeff Shannon
Technician/Programmer
Credit International