@@ -22178,9 +22178,10 @@ It accepts the following options:
@table @option
@item luma_radius, lr
-Set the luma radius. The option value must be a float number in
-the range [0.1,5.0] that specifies the variance of the gaussian filter
-used to blur the image (slower if larger). Default value is 1.0.
+Set the luma radius. The option value must be a float number in the
+range [0.1,5.0] that specifies the standard deviation of the gaussian
+filter used to blur the image (slower if larger). Default value is
+1.0.
@item luma_strength, ls
Set the luma strength. The option value must be a float number
@@ -22196,9 +22197,10 @@ a value included in [0,30] will filter flat areas and a value included
in [-30,0] will filter edges. Default value is 0.
@item chroma_radius, cr
-Set the chroma radius. The option value must be a float number in
-the range [0.1,5.0] that specifies the variance of the gaussian filter
-used to blur the image (slower if larger). Default value is @option{luma_radius}.
+Set the chroma radius. The option value must be a float number in the
+range [0.1,5.0] that specifies the standard deviation of the gaussian
+filter used to blur the image (slower if larger). Default value is
+@option{luma_radius}.
@item chroma_strength, cs
Set the chroma strength. The option value must be a float number