Not like in the docs: Gradients in other Colorspaces
Posted: 2018-04-17T08:18:41-07:00
When running any of the two example commands in Gradients in other Colorspaces to create a full rainbow gradient,
the result is different depending on whether I output to JPEG or to TIFF. If JPEG, the result is identical to that of the docs; if TIFF, the output is 16 bit and the gradient is not linear: red, green and blue areas are thicker than the colors in between them (yellow, cyan, magenta). Even if I downgrade the bitdepth to 8 bit by appending `-depth 8` either as the first option or the last before the output name, the result is visually identical.
I am using this version:
Code: Select all
convert -size 30x600 gradient:'#FFF-#0FF' -rotate 90 \
-set colorspace HSB -colorspace RGB \
gradient_rainbow_2.jpgCode: Select all
convert -depth 8 -size 30x600 gradient:'#FFF-#0FF' -rotate 90 \
-set colorspace HSB -colorspace RGB \
gradient_rainbow_2.tifCode: Select all
convert -size 30x600 gradient:'#FFF-#0FF' -rotate 90 \
-set colorspace HSB -colorspace RGB -depth 8 \
gradient_rainbow_2.tifCode: Select all
$ magick -version
Version: ImageMagick 7.0.7-28 Q16 x86_64 2018-03-25 http://www.imagemagick.org
Copyright: © 1999-2018 ImageMagick Studio LLC
License: http://www.imagemagick.org/script/license.php
Features: Cipher DPC HDRI Modules
Delegates (built-in): bzlib freetype jng jpeg ltdl lzma png tiff xml zlib