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Bad RGB values reading from TIFF

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I'm using libgfx (http://graphics.cs.uiuc.edu/~garland/software/libgfx.html) and libtiff to read in a tiff image and it's been working fine (I can display the images without a problem). Reading exact pixel values (I'm using the .tiff as a mask) however, I am getting some incorrect values. For example, the majority of an image is green (0,255,0) but there is a thin line of dark red (128,0,0). For a pixel right next to the dark red which in the image is pure green, I am getting (128,255,0), as if there was some aliasing going on. The pixel value in the image is definitely correct (the image is not aliased) so it would seem to be occurring during the reading of the image or in the RGB lookup. Any ideas? Thanks! Onnel

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This topic is 4546 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

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