doc/filters: Document geq *sum functions

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2019-12-28 11:26:10 +01:00
parent 48b6947821
commit d4b05f31d8
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@ -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