Yellow, and black "plates" of a CMYK image.

You can examine each of the individual plates, as you can see in Figure 7.18. Sometimes you'll find that one of them provides a pleasing, although not accurate rendition. For example, the magenta channel provides a splendid rendition of the castle walls, and appears to differentiate among the individual flowers. However, the grass is much too light, and the sky not as dramatic as before.

Figure 7.18. The top row shows the cyan and magenta color channels (left to right) while the bottom row shows the yellow and black channels (left to right).

Figure 7.18. The top row shows the cyan and magenta color channels (left to right) while the bottom row shows the yellow and black channels (left to right).

The cyan plate shows off the sky and clouds, but most of the rest of the image is muddy. The yellow plate renders the grass as almost black and offers little detail elsewhere in the picture. The black plate is what is

This document iscreated withtrialversionof CHM2PDFPilot2.16.100. detail in the shadows of the wall and darker foliage (as it's supposed to), leaving all the color information for the cyan, magenta, and yellow channels.

If you see a channel you'd like to use, continue on with these steps:

3. Choose Layer > New Adjustment Layer > Channel Mixer. Click on OK in the New Layer dialog box that pops up to create the Channel Mixer adjustment layer.

4. Click the Monochrome box in the Channel Mixer dialog box to direct your changes to a gray channel.

5. Move all the sliders to the 0 centerpoint except for the channel you want to work with. In this case, I moved the Magenta slider to the right until I got a black-and-white image I liked, as shown in Figure 7.19.

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