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Chapter 12. Working with Shapes and Masks > Applying Filters to Image Masks

Applying Filters to Image Masks

Any filters applied to an object used as a source for an image mask are passed through to the mask, but you can also apply filters directly to the image mask so that they only affect the grayscale information in the mask and not the underlying object. For example, if you are using an image mask based on an object’s brightness, you could use a color correction filter to increase the opacity of the mask without affecting the underlying object (Figure 12.42).

Figure 12.42. Here we are using the luminance of the leaf to create a mask. Because the leaf wasn’t very bright, we added a Levels filter to the image mask to increase the brightness, and therefore opacity, of the mask without affecting the leaf object.



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