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December 2004
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2004.12.07 11:48 "Re: Fetching pixel data from 4bit tiff", by Joris Van Damme
> Ah, excelent. I was starting to doubt my data. So if it converts from > greyscale to RGBA, surely the R, G, B values would all be the same? eg > > R=45 > G=45 > B=45 > > The data I'm pulling out doesn't fit this pattern at all: > > eg: > > R G B > > 71 202 94 > 14 209 94 > 213 215 94 > 156 222 94 > 99 229 94 I'm not using the stuff myself, but it should indeed return R=G=B if the source is indeed grayscale. Perhaps we can see what's going on if you post a tagdump of the source tiff, and a code snippet. (A tagdump can be made with a tool included in LibTiff, tiffinfo, or by the tag viewer pointed to in my signature if you're a windows user.) Joris Van Damme info@awaresystems.be http://www.awaresystems.be Download your free TIFF tag viewer for windows here: http://www.awaresystems.be/imaging/tiff/astifftagviewer.html