Legacy ImageMagick Discussions Archive

Btw, thresholding the composite mask works as expected: convert -size 1x265 gradient: -flip \ \( -clone 0 -sigmoidal-contrast 8x50% \) \ \( -clone 0 -threshold 50% \) \ -composite imtest3.tif http://gnidam.net/files/imtest/imtest-graph3.jpg ...so midtones in the mask don't have any effect, just maxv...

Hi all, until version (Linux) Version: ImageMagick 6.8.9-10 Q16 x86_64 2015-03-03 Features: DPC Modules OpenMP using a gradient mask this way: convert -depth 16 -size 1x4096 gradient: -flip -write mpr:gradient \ \( mpr:gradient -sigmoidal-contrast 8x50% \) \( mpr:gradient \) \ -composite imtest.tif ...

Version: ImageMagick 6.7.5-3 2012-02-07 Q16 / Arch Linux (64bit)
Features: OpenMP HDRI

Problem's gone, 16bit TIFFs come out fine again.
Thank you! Martin

Same problem here with 16-bit TIFFs (garbled output for above rose3.tiff and rose4.tiff)
on Arch Linux (64bit):
Version: ImageMagick 6.7.5-2 2012-02-06 Q16
Features: OpenMP HDRI

Problems seem to be starting from version 6.7.4.7 onwards,
6.7.4.6 seems fine...

Thx! Martin