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.
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-08-24T13:10:53-07:00
IM 6.7.9.1 Q16 Mac OSX Snow Leopard
Input:
In this command the first image (channel G = saturation) never gets negated.
convert zelda3_lowsat.jpg -colorspace HSL -channel G
-negate +channel \
-channel B -solarize 50% -level 0x50% +channel -channel GB -separate +channel \
zelda3_lowsat_sb_solar1_%d.jpg
In this command the first image (channel G = saturation) properly gets negated.
convert zelda3_lowsat.jpg -colorspace HSL -channel GB -separate +channel \
\( -clone 0
-negate \) \
\( -clone 1 -solarize 50% -level 0x50% \) \
-delete 0,1 zelda3_lowsat_sb_solar2_%d.jpg
Is this a bug or am I misunderstanding or missing some thing?
Last edited by
fmw42 on 2012-08-25T22:43:09-07:00, edited 1 time in total.
magick
Site Admin
Posts: 11064 Joined: 2003-05-31T11:32:55-07:00
Post
by magick 2012-08-24T17:06:17-07:00
The negate for the green channel is working:
convert zelda3_lowsat.jpg -colorspace HSL -channel G -negate -verbose info:
Code: Select all
Red:
min: 0 (0)
max: 255 (0.999878)
mean: 74.911 (0.293768)
standard deviation: 98.3857 (0.385826)
kurtosis: -0.569333
skewness: 1.13011
Green:
min: 0 (0)
max: 255 (1)
mean: 149.094 (0.584682)
standard deviation: 80.9888 (0.317603)
kurtosis: -0.968081
skewness: -0.641811
Blue:
min: 0 (0.000457771)
max: 247 (0.969345)
mean: 92.5542 (0.362958)
standard deviation: 55.062 (0.215929)
kurtosis: -0.451429
skewness: 0.582601
convert zelda3_lowsat.jpg -colorspace HSL -verbose info:
Code: Select all
Red:
min: 0 (0)
max: 255 (0.999878)
mean: 74.911 (0.293768)
standard deviation: 98.3857 (0.385826)
kurtosis: -0.569333
skewness: 1.13011
Green:
min: 0 (0)
max: 255 (1)
mean: 105.906 (0.415318)
standard deviation: 80.9888 (0.317603)
kurtosis: -0.968081
skewness: 0.641811
Blue:
min: 0 (0.000457771)
max: 247 (0.969345)
mean: 92.5542 (0.362958)
standard deviation: 55.062 (0.215929)
kurtosis: -0.451429
skewness: 0.582601
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-08-24T17:17:35-07:00
But it does not work when followed by the solarize on the blue channel. Run my commands and look at the output images. The first image (green=saturation) has not been inverted in the first command but is inverted in the second command.
magick
Site Admin
Posts: 11064 Joined: 2003-05-31T11:32:55-07:00
Post
by magick 2012-08-24T18:00:59-07:00
The -solarize option is not sensitive to the -channel option. We'll add support in the next point release.
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-08-25T13:58:34-07:00
With the latest beta from today, it appears to be now properly negating the saturation, but not properly solarizing the brightness.
Input:
Bad:
convert zelda3_lowsat.jpg -colorspace HSL -channel G -negate +channel \
-channel B -solarize 50% -level 0x50% +channel -channel GB -separate +channel \
zelda3_lowsat_sb_solar1_%d.jpg
Negated saturation correct
Solarized brightness incorrect
Correct:
convert zelda3_lowsat.jpg -colorspace HSL -channel GB -separate +channel \
\( -clone 0 -negate \) \
\( -clone 1 -solarize 50% -level 0x50% \) \
-delete 0,1 zelda3_lowsat_sb_solar2_%d.jpg
Negated saturation correct
Solarized brightness correct
magick
Site Admin
Posts: 11064 Joined: 2003-05-31T11:32:55-07:00
Post
by magick 2012-08-25T15:29:40-07:00
Will have a patch in about an hours. Thanks.
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-08-25T22:42:37-07:00
magick wrote: Will have a patch in about an hours. Thanks.
Thanks. Seems to be working fine now in IM 6.7.9.2 Q16 just released.
