| 5.6. Sobel | ||
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5. Edge-Detect Filters |  |
| 5.6. Sobel | ||
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5. Edge-Detect Filters | |
You can find this filter through → → .
Sobel's filter detects horizontal and vertical edges separately on a scaled image. Color images are turned into RGB scaled images. As with the Laplace filter, the result is a transparent image with black lines and some rest of colors.
Sobel Horizontally: Renders near horizontal edges.
Sobel Vertically: Renders near vertical edges.
Keep sign of result: This option works when only one direction is selected: it gives a flat relief with bumps and hollows to the image.
