CODEWITHSUNDEEP
imagemagick
user2720948
user2720948

Reputation: 3

Duplicate photoshop level command in Imagemagick

All ,

How can I apply level (10, 245, 095) to a picture. When these level are applied in photoshop the results are different, when I am doing same in Imagemagick I get a completely different result. What am I missing

Upvotes: 0

Views: 125

Answers (1)

dlemstra
dlemstra

Reputation: 8153

This question was also asked on the ImageMagick forum and answered by Fred (http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=26023). This is his answer:

IM -level values for min and max, depend upon the Q level of your IM compile. check convert -version. I assume it will say Q16, which means that IM is expecting values in the range of 0 to 65535. So you need to convert your values of 0 to 255 to the range of 65535 or what I usually do is convert the values to percent and use that:

10/255 = 0.03921568627451 (x100 to get percent)
245/255 = 0.96078431372549 (x100 to get percent)

so try

-level 3.921%,96.08%,0.95

The gamma value (0.95) does not need any conversion.

See: http://www.imagemagick.org/script/command-line-options.php#level

Upvotes: 2

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