1997
Thorsten Schnier
Specialized direction-dependent edge detection
This plugin calculates the gradient with a sobel operator. The user can specify which direction to use. When both directions are used, the result is the RMS of the two gradients; if only one direction is used, the result either the absolut value of the gradient, or 127 + gradient (if the 'keep sign' switch is on). This way, information about the direction of the gradient is preserved. Resulting images are not autoscaled.
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Type | Name | Description |
---|---|---|
PF_INT | run-mode | The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) } |
PF_IMAGE | image | Input image (unused) |
PF_DRAWABLE | drawable | Input drawable |
PF_INT | horizontal | Sobel in horizontal direction |
PF_INT | vertical | Sobel in vertical direction |
PF_INT | keep-sign | Keep sign of result (one direction only) |
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