2007.05.02 13:00 "[TIFF] CCITT RLE image is inverted", by

2007.05.02 14:47 "Re: [TIFF] CCITT RLE image is inverted", by Bob Friesenhahn

On Wed, 2 May 2007 tame@lexmark.com wrote:

I have a CCITT RLE compressed image with photometric interpretation of MinIsZero that appears "correct" in Windows Viewer, but appears "inverted" in GIMP, Photoshop and IrfanView.

> From the output from libtiff, it appears that GIMP, et al is honoring the photometric interpretation, but Windows Viewer is not? I wasn't sure if that was the case, or maybe libtiff is inverting the data before passing back to the caller.

It seems that you have answered your own question. The Windows viewer is broken. However, use of min-is-black with this compression algorithm is unusual.

Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/