Divide an conquer! That’s what I always say. But how do you go about dividing an image up into it’s separate channels–like Photoshop does it?
There are actually two ways to go about doing it. First, is displaying the actual amount of red, green, or blue that is contained in each pixel which results in images that are made up entirely of shades of the color channel that you are viewing. The second is to to simply display the information in an easily understood visual representation by using shades of grey. Both are detailed below.
» Read more: Separate RGB Channels from an Image in PHP
