| 2.4. Selective Gaussian Blur | ||
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2. Blur Filters |  |
| 2.4. Selective Gaussian Blur | ||
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2. Blur Filters | |
Contrary to the other blur plug-ins, the Selective Gaussian Blur plug-in doesn't act on all pixels: blur is applied only if the difference between its value and the value of the surrounding pixels is less than a defined Delta value. So, contrasts are preserved because difference is high on contrast limits. It is used to blur a background so that the foreground subject will stand out better. This add a sense of depth to the image with only a single operation.
Figure 16.12. “Selective Gaussian” filter parameters settings Options du filtre “Flou gaussien sélectif”
Here you can set the blur intensity, in pixels.
Here you can set the maximum difference (0-255) between the pixel value and the surrounding pixel values. Above this Delta, blur will not be applied to that pixel.
