[Image-SIG] modes in Image package

[Bob Klimek]

Victor Reijs wrote:

>Do I understand that a tif file can be 3*16 bits (my knowledge of file 
>format is not that good)?
>  
>
Yes. Many, if not most scanners output in 48-bit color. Many of the 
better digital cameras output in 12-bits per plane. And most medical 
imaging is greater than 8-bits per plane.

>But say I start with a jpg file of 3*8 bits (e.g. most cameras only can 
>handle 8 bit band depth).
>Can I now translate my 8*3-bit JPG into 16*3 bit TIF in PIL, then use 
>split, 'function on each band', merge, matrix convert and 'function on 
>all bands' and translate to from 16*3 TIF to 8*3 bit JPG?
>  
>
That's what I'm trying to find out. So far my attempts to read in a 
48-bit image into PIL have failed. But that doesn't mean that it can't 
be done.

>It are the specific translation functions (3*8 -> 3*16 and back) I am 
>interested in.
>
>(I have the above procedure working BUT all in a 3*8 environment and it 
>works fine, but I would like to have less color noise due to the low 
>resolution of 8 bits).
>
>All the best,
>
>
>Victor
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