guided filter: properly validate radius parameter before calling boxblur

2018-10-10 22:49:12 +02:00
parent 30d8a674aa
commit 02a15bc58d
2 changed files with 1 additions and 2 deletions
--- a/rtengine/guidedfilter.cc
+++ b/rtengine/guidedfilter.cc
@@ -110,6 +110,7 @@ void guidedFilter(const array2D<float> &guide, const array2D<float> &src, array2
    const auto f_mean =
        [](array2D<float> &d, array2D<float> &s, int rad) -> void
        {
+            rad = min(rad, s.width() / 2, s.height() / 2);
            boxblur<float, float>(s, d, rad, rad, s.width(), s.height());
        };