surf: fix OpenCL condition

85a284c0 · Alexander Alekhin · d32827a8 · 85a284c0
Commit 85a284c0 authored Sep 28, 2017 by Alexander Alekhin
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surf.cpp modules/xfeatures2d/src/surf.cpp +1 -1

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--- a/modules/xfeatures2d/src/surf.cpp
+++ b/modules/xfeatures2d/src/surf.cpp
@@ -893,7 +893,7 @@ void SURF_Impl::detectAndCompute(InputArray _img, InputArray _mask,
    CV_Assert(_descriptors.needed() || !useProvidedKeypoints);
 #ifdef HAVE_OPENCL
-    if( ocl::useOpenCL() )
+    if( ocl::useOpenCL() && _img.isUMat())
    {
        SURF_OCL ocl_surf;
        UMat gpu_kpt;