Editing and Recombining Channels

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Editing and Recombining Channels

You just looked at channel splitting as a means of making selections. Earlier in the chapter, you explored splitting an image into its CMYK channels for professional print jobs. Now you are going to see that splitting an image into separate channels also can be useful for color correction and for creating odd effects.

For example, you can reduce a blue cast in an image by splitting the image into its RGB channels and darkening the Blue channel. Then recombine the channels with I mage > Co m bine Channel > C ombine From RGB. See the color plate section for the original image and for its modified Blue channel counterpart .

You also can adjust an image by using filters on one or two split channels. For instance, sharpening sometimes introduces unwanted noise. But try one of the Sharpen filters on only one or two channels and then recombine the channels. The result will probably be subtle sharpening without noise.

To create effects, try using other filters on a channel, such as Emboss, Hot Wax Coating, or Mosaic. Also try applying one of the Histogram functions to a channel. Combine the modified channel with the other channels and see what results! Also try shuffling the channels (for instance, using the Red channel as the Blue channel, the Blue channel as the Green, and the Green as the Red) or splitting into RGB channels and then recombining as HSL channels. Much of the time, the result will be positively hideous, but sometimes, you'll be in for a pleasant surprise. (See the color plate section.)

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Paint Shop Pro 8 Power
Paint Shop Pro 8 Power!
ISBN: B001QCXEI6
EAN: N/A
Year: 2006
Pages: 125
Authors: Lori J. Davis

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