O'Reilly logo

Adobe® Photoshop® CS2 Studio Techniques by Ben Willmore

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Using Color Channels

If you leave the pop-up menu at the top of the Blending slider area set to gray, then Photoshop will ignore the colors in your document and just analyze the brightness of the image (as if the image were in Grayscale mode). By changing this menu, you will be telling Photoshop to look at the information in the individual color channels to determine which areas should be visible (Figure 15.24). For example, if you have a document that is in CMYK mode and you change the pop-up menu to cyan and move the upper-right slider to 26, you'll make all areas of the layer that contain 10% or less cyan disappear. This can be useful when you want to remove a background that contains one dominant color.

Figure 15.24. The Blend If pop-up ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required