From: Heesob Park <phasis@...>
Date: 2008-10-23T16:18:18+09:00
Subject: Re: RMagick: Method to invert the colors of an image

2008/10/23 Anukul Singhal <anukul.singhal@gmail.com>:
> 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?
>
I guess you want to negate the colors.

Refer to http://studio.imagemagick.org/RMagick/doc/image2.html#negate

Regards,

Park Heesob