Each pixel in the image is replaced with a gray value dependent on the distance to the nearest obstacle pixel, generally a boundary pixel. Different methods can be used to calculate the distance.
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These options are described in Del 2, «Common Features». |
«Metric» is a topology term. Three methods are available:
Euclidean default: the distance is a line.
Manhattan: the distance is the sum of the one-dimensional distances along the X and Y axes.
Chebyshev: the distance is the maximum of the one-dimensional distances along the X and Y axes.
Default is 0. Increasing this value selects higher lightness pixels
Default is 1. Decreasing this value makes result darker.
Number of computations for grayscale averaging.
This option is checked by default. If you uncheck it, no blur is created.
The result of this filter can be larger than the original image. With the default Adjust option, the layer will be automatically resized as necessary when the filter is applied. With the Clip option the result will be clipped to the layer boundary.