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Chapter 8. Understanding Colors and Chan... > Using the Threshold and Posterize Ad...

Using the Threshold and Posterize Adjustments

The Threshold adjustment splits an image into black and white, based on the original brightness levels of the pixels. It's useful for locating the darkest and lightest pixels in an image, or for creating some great looking black and white special effects. The Posterize adjustment creates a simpler image by reducing the number of colors. It's useful for creating an image with a clipart look, or for reducing the number of colors in preparation for the Web.


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