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-rw-r--r--doc/filters.texi6
1 files changed, 3 insertions, 3 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index d6c15837f2..267bd04a43 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -9955,13 +9955,13 @@ The order of differentiation to be applied on the scene. Must be chosen in the r
@item minknorm
The Minkowski parameter to be used for calculating the Minkowski distance. Must
-be chosen in the range [0,65535] and default value is 1. Set to 0 for getting
+be chosen in the range [0,20] and default value is 1. Set to 0 for getting
max value instead of calculating Minkowski distance.
@item sigma
The standard deviation of Gaussian blur to be applied on the scene. Must be
-chosen in the range [0,1024.0] and default value = 1. Sigma can't be set to 0
-if @var{difford} is greater than 0.
+chosen in the range [0,1024.0] and default value = 1. floor( @var{sigma} * break_off_sigma(3) )
+can't be euqal to 0 if @var{difford} is greater than 0.
@end table
@subsection Examples