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Date Posted: 06:58:18 01/13/04 Tue
Author: Glup
Subject: Re: TIFF G4 File structure different
In reply to: Michel 's message, "Re: TIFF G4 File structure different" on 21:43:01 12/07/03 Sun

>I think MMR is the
>same thing as group IV tiff compression, but I am not
>sure.

MMR means Modified Modified Read Code and is a 2d compression used by G4 but could also be with G3.

MR (Modified Read Code) is a less effective 2d compression used by G3.

MH (Modified Huffman Code) is the "standard" 1d compression used by G3.

>>On the other hand, I created a simple bitonal BMP file
>>and saved as TIF G4 by Kodak Imaging and Envision.
>>They are different..! Why are those tif files
>>different?

What means different?
The binary structure and even the filesize will be most certainly be different since this is the nature of different tiff encoder implementation: They will e.g. at least set different "Software" Tags.

I have written a TIFF/IFD reader giving you the possibility to display the content of the IFD and give possibly some enlightment.

Rgds

:-glup

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