Hi,

I am using RMagick gem to work with images. In one of my methods, I want
to totally invert the colors of the image file. I searched the Rmagick
API but am not able to converge to a method which can do so (Probably,
there exists one, but I am not able to find it)

Can anyone please tell if there is any method in RMagick to accomplish
this task?

Thanks,
Anukul
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