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Date Posted: 05:57:04 06/03/02 Mon
Author: Paul
Subject: Unknown Compression Format (Tiff)

Hi Michel!

A short question about a specific compression type. I have an black-and-white image, compressed with the "CCITT Group 3(1d) Mod.Huffman" or short "Huffman RLE, 1200 DPI". When I load the image into the imagescrollbox and test it with the TiffCompressionStr()-function the result is tcNone.

Afterwards I do some manipulation(change som pixels) and try to save the file. Then on the BeforeSave Event I test again:

if Graphic.ImageFormat = ifBlackWhite
...TTiffGraphic(Graphic).Compression := tcGroup4

But the compression type remains tcNone.

Any suggestions?

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