From ae8d435ba8bc3a7ead9b5c6ad6ce54b4cc8111af Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Thu, 11 Apr 2013 18:27:31 +0000 Subject: [PATCH] doc/filters: add quick emboss example Signed-off-by: Paul B Mahol --- doc/filters.texi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/doc/filters.texi b/doc/filters.texi index 6b4f553a28..cf3a3f03c0 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -3388,6 +3388,12 @@ Generate a fancy enigmatic moving light: @example nullsrc=s=256x256,geq=random(1)/hypot(X-cos(N*0.07)*W/2-W/2\,Y-sin(N*0.09)*H/2-H/2)^2*1000000*sin(N*0.02):128:128 @end example + +@item +Generate a quick emboss effect: +@example +format=gray,geq=lum_expr='(p(X,Y)+(256-p(X-4,Y-4)))/2' +@end example @end itemize @section gradfun