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7.3.2.
Activate the filter
You can find this filter through
→ → .
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Algorithm
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Edge detector offers several detection methods:
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Sobel: Here, this method has no options
and so is less interesting than the specific Sobel.
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Prewitt: Result doesn't look different
from Sobel.
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Gradient: Edges are thinner, less
contrasted and more blurred than Sobel.
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Roberts: No evident difference from Sobel.
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Differential: Edges less bright.
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Laplace: Less interesting than the
specific one.
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Amount
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A low value results in black, high-contrasted image with thin
edges. A high value results in thick edges with low contrast and
many colors in dark areas.
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Wrap, Smear, Black
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Where the edge detector will get adjoining pixels for its
calculations when it is working on the image boundaries. This
option will only have an effect on the boundaries of the result
(if any). Smear is the default and the best
choice.
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