From d4b05f31d895a4ed13e969348265e5031de1dfdb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 28 Dec 2019 11:26:10 +0100 Subject: [PATCH] doc/filters: Document geq *sum functions Signed-off-by: Michael Niedermayer --- doc/filters.texi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/filters.texi b/doc/filters.texi index 95f31b9592..13403fd96c 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -11452,6 +11452,10 @@ red/green/blue component. Return 0 if there is no such component. Return the value of the pixel at location (@var{x},@var{y}) of the alpha plane. Return 0 if there is no such plane. +@item psum(x,y), lumsum(x, y), cbsum(x,y), crsum(x,y), rsum(x,y), gsum(x,y), bsum(x,y), alphasum(x,y) +Sum of sample values in the rectangle from (0,0) to (x,y), this allows obtaining +sums of samples within a rectangle. See the functions without the sum postfix. + @item interpolation Set one of interpolation methods: @table @option