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-rw-r--r--libavfilter/vf_edgedetect.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavfilter/vf_edgedetect.c b/libavfilter/vf_edgedetect.c
index 5902c51..60112cb 100644
--- a/libavfilter/vf_edgedetect.c
+++ b/libavfilter/vf_edgedetect.c
@@ -142,7 +142,7 @@ static int get_rounded_direction(int gx, int gy)
* Gy/Gx is the tangent of the angle (theta), so Gy/Gx is compared against
* <ref-angle>, or more simply Gy against <ref-angle>*Gx
*
- * Gx and Gy bounds = [1020;1020], using 16-bit arithmetic:
+ * Gx and Gy bounds = [-1020;1020], using 16-bit arithmetic:
* round((sqrt(2)-1) * (1<<16)) = 27146
* round((sqrt(2)+1) * (1<<16)) = 158218
*/
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