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Date Posted: 11:42:39 11/02/01 Fri
Author: Tomaz Koritnik
Subject: Palette bug

Hi

After I scan a BW image with TWAIN I get DIB handle. Then I use AssignFromDibHandle to put image into TTiffGraphic class. If I use this image the colors are all ok but if I save this image to tif file and then open it with TTiffgraphic I get inverted image.
TWAIN returns palette with dib and this palette is inverted. In BW palette Envision uses 0 for black and 1 for white, but TWAIN returns palette where 1 is black and 0 is white. By this, the theory is that TTiffGraphic doesn't save palette that was loaded with dib, or probably saves it's own palette (inverted!). This is a posibble explanation of inverted image as result. Michael: a bug?

Best regards

Tomaz Koritnik
NEOSYS

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