aaaj wrote:
hi i am using cs2 but i didnt understand channels explain it
Channels are the data that is actually stored in each pixel of an image. If you have a monochrome image (only 2 colors), that means that the image has only one channel, and that channel has only two values, which are typically white or black.
If you have a grayscale image (say 256 shades of gray), then that image still has only one channel. That channel has 256 possible values, ranging from black (0) to white (255).
If you have an RGB/8 image, that means that you have three channels: red, green, and blue. Every pixel in the image has some amount of red, green and blue. The "8" means that each of those three channels is 8 bits, which means they have 256 possible values, because 2^8 = 256.
Channels can be used to store any information that you want — not just color. "Alpha" is a value commonly stored in a channel. It is used in effects like transparency. It’s just another number, again, typically from 0 to 255.
You can create a channel for whatever you want… Store your lucky number in every pixel of an image, if you like.
