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doc/filters.texi: add yet another laplacian edge detector

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Paul B Mahol
2017-08-05 10:36:48 +02:00
parent 44e9783ab9
commit c474910414
1 changed files with 6 additions and 0 deletions
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doc/filters.texi
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@@ -5880,6 +5880,12 @@ Apply edge detect:
convolution="0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:0 1 0 1 -4 1 0 1 0:5:5:5:1:0:128:128:128"
@end example
@item
Apply laplacian edge detector which includes diagonals:
@example
convolution="1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:1 1 1 1 -8 1 1 1 1:5:5:5:1:0:128:128:0"
@end example
@item
Apply emboss:
@example