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Chapter 7. Working with Adjustment Layer... > Using the Gaussian Blur and Despeckl...

Using the Gaussian Blur and Despeckle Filters

You can also apply the Gaussian Blur filter which blurs an image, or a selection by a controllable amount. While not strictly a restoration tool, the Gaussian Blur filter can be used to add a sense of depth to the image. For example, you could select and blur the background of an image, while leaving the foreground object in focus. The outcome of the filter is to create a hazy, out-of-focus effect to the image. Another filter, the Despeckle filter, detects the edges in an image and blurs the entire image except those edges. Of course, there are no real edges in a Photoshop document—the Despeckle filter works along areas where there is a significant shift in the brightness of the pixels. Since a shift in brightness usually signifies an edge, the Despeckle filter performs a very accurate blurring of the image, while preserving detail.


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