TIF Alpha+LZW conversion problems

Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
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dargaud
Posts: 31
Joined: 2006-08-06T01:58:58-07:00

TIF Alpha+LZW conversion problems

Post by dargaud »

I have a problem when converting TIF images using LZW compression that also contain an alpha channel. The result is garbage...
Examples of conversion:

convert 20060831-SergentVPano_LZW.tif jpg:20060831-SergentVPano_LZW.jpg
convert 20060831-SergentVPano_Packbits.tif jpg:20060831-SergentVPano_Packbits.jpg

As you see on the sample images, packbit compression works fine.
Image

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magick
Site Admin
Posts: 11254
Joined: 2003-05-31T11:32:55-07:00

Post by magick »

The conversion worked fine for us. We're using ImageMagick 6.2.9-5, the current release.

dargaud
Posts: 31
Joined: 2006-08-06T01:58:58-07:00

Post by dargaud »

Sorry, I forgot the version number: 6.0.4-1 which is the most recent Cygwin version.

dargaud
Posts: 31
Joined: 2006-08-06T01:58:58-07:00

Post by dargaud »

Downloaded and compiled latest version. Works fine now. Thanks. I should give feedback to the cygwin folks instead.

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