fixed SURF orientations, broken in r8892

(see also r8895, r8887 and #2043)
13 years ago · ffd283b7d5
parent 0b4e96d89c
commit ffd283b7d5
1 changed files with 2 additions and 2 deletions
--- a/modules/nonfree/src/surf.cpp
+++ b/modules/nonfree/src/surf.cpp
@ -681,8 +681,8 @@ struct SURFInvoker
            if( !upright )
            {
                descriptor_dir *= (float)(CV_PI/180);
-                float sin_dir = std::sin(descriptor_dir);
-                float cos_dir = std::cos(descriptor_dir);
+                float sin_dir = -std::sin(descriptor_dir);
+                float cos_dir =  std::cos(descriptor_dir);

                /* Subpixel interpolation version (slower). Subpixel not required since
                the pixels will all get averaged when we scale down to 20 pixels */