Legacy ImageMagick Discussions Archive

Hello, I trying learn somethink but i get stuck. Im using Windows cmd and ImageMagick 7.0.8-4 Q16 x64 2018-07-03;
What im trying do is negate black pixel to white during my process, But when im doing this my whole result is negatived.
This is my command

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cmd /c  convert ( "\mockupImages\Backpack_black.jpg" ) ^ "\D0-1999\162 - Alien head (pocket)\-W-.png" -geometry 582.0829986613119x740.4979919678715+989.1880856760375+832.5997322623829  -composite "D:\out.jpg"

How can i only negate -W-.png not whole file.

The first pair of parentheses does nothing, and can be removed.

To negate just the second image, put it in parentheses with "-negate":

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cmd /c convert "\mockupImages\Backpack_black.jpg"  ^ ( "\D0-1999\162 - Alien head (pocket)\-W-.png" -negate ) -geometry 582.0829986613119x740.4979919678715+989.1880856760375+832.5997322623829 -composite "D:\out.jpg"

it works and not works

even if i put "-background none" in ( "W.png" -background none -negate ) result same.
its my design

and this is my result

For v7, I suggest you use "magick", not "convert".

You want to restrict the negation to the RGB channels, not alpha, so:

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... -channel RGB -negate +channel ...

Thank you very for help and share of knowledge

It works now perfectly.

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