I used a manual blur tool on the blue channel, coz that was a bit grainy.

They are usually represented with red, green, and blue channels.

True-color uses only red, green, and blue channels, mapped to their respective colors.

He pulled up and looked at the only visible break in the reef, a deep blue channel, and headed toward it.

Thus we see only the blue channel of the image, but rather blue tinted than black and white.

Therefore the blue channel will have a greater depth of field than the other colours.

For instance, an image from a standard digital camera will have a red, green and blue channel.

An RGB image has three channels: red, green, and blue.

But there weren't any Customs officers on duty in the blue channel.

The resulting image was 512 by 480 by 24 (8 bits for red, green and blue channels) which took 2 minutes to render.