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Date Posted: 18:30:31 11/06/01 Tue
Author: Michel
Subject: Re: Palette bug
In reply to: Tomaz Koritnik 's message, "Palette bug" on 11:42:39 11/02/01 Fri

Hi Tomaz,

Your explanation sounds very probable. I'll contact you directly to try out, some change.

Best regards,


> 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

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