fixed optional args processing in SVD::compute()

8 years ago · cb52d249fe
parent 0a3a2df433
commit cb52d249fe
1 changed files with 5 additions and 5 deletions
--- a/modules/core/src/lapack.cpp
+++ b/modules/core/src/lapack.cpp
@ -1560,18 +1560,18 @@ static void _SVDcompute( InputArray _aarr, OutputArray _w,
        JacobiSVD(temp_a.ptr<double>(), temp_u.step, temp_w.ptr<double>(),
              temp_v.ptr<double>(), temp_v.step, m, n, compute_uv ? urows : 0);
    }
-    temp_w.copyTo(_w);
+    if(_w.needed()) temp_w.copyTo(_w);
    if( compute_uv )
    {
        if( !at )
        {
-            transpose(temp_u, _u);
-            temp_v.copyTo(_vt);
+            if(_u.needed()) transpose(temp_u, _u);
+            if(_vt.needed()) temp_v.copyTo(_vt);
        }
        else
        {
-            transpose(temp_v, _u);
-            temp_u.copyTo(_vt);
+            if(_u.needed()) transpose(temp_v, _u);
+            if(_vt.needed()) temp_u.copyTo(_vt);
        }
    }
 }