Use ImageMagick to create CMYK color pictures, the CMYK values shown in Photoshop are different!

Hello, everyone! I use ImageMagick in PHP to create CMYK color pictures, in Photoshop, the CMYK value is not the same! For example: In ImageMagick the color set by Imagickpixel is CMYK (0,0,0,100) (black), and when Phototshop is viewed with a straw, it becomes CMYK (61,61,61,0). The visual look is obviously not black. Trouble to help analyze the reasons, thank you!

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Hello, everyone! I use ImageMagick in PHP to create CMYK color pictures, in Photoshop, the CMYK value is not the same! For example: In ImageMagick the color set by Imagickpixel is CMYK (0,0,0,100) (black), and when Phototshop is viewed with a straw, it becomes CMYK (61,61,61,0). The visual look is obviously not black. Trouble to help analyze the reasons, thank you!

The code I tested is here: http://liudonghua.net/use-imagemagick-to-create-cmyk-image-in-php/

On the StackOverflow some people say that this is a imagemagick bug, the solution provided for the simple color effective, http://stackoverflow.com/questions/37981616/ I-create-a-cmyk-image-by-php-imagemagick-but-cmyk-color-is-different-on-photosh

I reported this bug, a friend in need can pay attention to: https://bugs.php.net/bug.php?id=72481

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