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.
shadowhand
Posts: 14 Joined: 2013-09-20T17:57:29-07:00Authentication code: 6789
Post
by shadowhand 2013-09-24T09:55:57-07:00
Okay, it appears that 6.8.6-10 works well for Mac, but does not work properly on Linux:
Code: Select all
linux # convert -version
Version: ImageMagick 6.8.6-10 2013-09-24 Q8 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2013 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates: bzlib fontconfig freetype jbig jng jp2 jpeg lcms ltdl lzma png png tiff xml zlib
linux # for file in alpha false-alpha no-alpha alpha-partial; do echo $file; convert "rgb-$file.png" -channel a -separate -format "%[fx:minima] %[fx:maxima]\n" info:; done
alpha
0 1
false-alpha
1 1
no-alpha
0 1
alpha-partial
0.501961 1
Still getting the wrong result for the no-alpha test file.
anthony
Posts: 8883 Joined: 2004-05-31T19:27:03-07:00Authentication code: 8675308Location: Brisbane, Australia
Post
by anthony 2013-10-02T19:42:43-07:00
I am just wondering if the separation leaves a alpha channel present, though perhaps turned off (CF: -alpha off)
shadowhand
Posts: 14 Joined: 2013-09-20T17:57:29-07:00Authentication code: 6789
Post
by shadowhand 2013-10-08T09:23:38-07:00
6.8.7 has the same issue under linux:
Code: Select all
linux # convert -version
Version: ImageMagick 6.8.7-0 2013-10-07 Q8 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2013 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates: bzlib fontconfig freetype jbig jng jp2 jpeg lcms ltdl lzma png png tiff xml zlib
linux # for file in alpha false_alpha no_alpha alpha_partial; do echo $file; convert "rgb_$file.png" -channel o -separate -format "%[fx:minima] %[fx:maxima]\n" info:; done
alpha
0 1
false_alpha
1 1
no_alpha
0 1
alpha_partial
0.501961 1
Tests show that "no alpha" test is still failing under linux.
shadowhand
Posts: 14 Joined: 2013-09-20T17:57:29-07:00Authentication code: 6789
Post
by shadowhand 2013-10-23T20:04:10-07:00
Bump? No new releases of IM in the last month?
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2013-10-23T21:07:43-07:00
shadowhand
Posts: 14 Joined: 2013-09-20T17:57:29-07:00Authentication code: 6789
Post
by shadowhand 2013-10-24T15:59:08-07:00
Still the same problem with latest release:
Code: Select all
linux # convert -version
Version: ImageMagick 6.8.7-2 2013-10-24 Q8 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2013 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates: bzlib fontconfig freetype jbig jng jp2 jpeg lcms ltdl lzma png png tiff xml zlib
linux # for file in alpha false-alpha no-alpha alpha-partial; do echo $file; convert "rgb-$file.png" -channel a -separate -format "%[fx:minima] %[fx:maxima]\n" info:; done
alpha
0 1
false-alpha
1 1
no-alpha
0 1
alpha-partial
0.501961 1
