guided filter: proper bounding of the radius before calling boxblur

2018-10-11 13:41:41 +02:00
parent 34321c7012
commit 83f5205006
2 changed files with 3 additions and 1 deletions
--- a/rtengine/guidedfilter.cc
+++ b/rtengine/guidedfilter.cc
@@ -110,7 +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);
+            rad = LIM(rad, 0, (min(s.width(), s.height()) - 1) / 2 - 1);
            boxblur<float, float>(s, d, rad, rad, s.width(), s.height());
        };