added default detector for winSize(64,128) for hog on gpu

modules/core/src/system.cpp

@@ -528,8 +528,8 @@ CV_IMPL const char* cvErrorStr( int status )
     case CV_StsBadMemBlock :  return "Memory block has been corrupted";
     case CV_StsAssert :  return "Assertion failed";
     case CV_GpuNotSupported : return "No GPU support";
-    case CV_GpuApiCallError : return "GPU API error";
-    case CV_GpuNppCallError : return "NPP API error";
+    case CV_GpuApiCallError : return "Gpu Api call";
+    case CV_GpuNppCallError : return "Npp Api call";
     };
 
     sprintf(buf, "Unknown %s code %d", status >= 0 ? "status":"error", status);

modules/gpu/include/opencv2/gpu/gpu.hpp

@@ -995,6 +995,7 @@ namespace cv
             double getWinSigma() const;
 
             static vector<float> getDefaultPeopleDetector();
+            static vector<float> getDefaultPeopleDetector_64x128();
             void setSVMDetector(const vector<float>& detector);
             bool checkDetectorSize() const;
 

modules/gpu/src/hog.cpp

@@ -56,6 +56,7 @@ void cv::gpu::HOGDescriptor::detectMultiScale(const GpuMat&, vector<Rect>&, doub
 int cv::gpu::HOGDescriptor::numPartsWithin(int, int, int) { throw_nogpu(); return 0; }
 cv::Size cv::gpu::HOGDescriptor::numPartsWithin(cv::Size, cv::Size, cv::Size) { throw_nogpu(); return cv::Size(); } 
 std::vector<float> cv::gpu::HOGDescriptor::getDefaultPeopleDetector() { throw_nogpu(); return std::vector<float>(); }
+std::vector<float> cv::gpu::HOGDescriptor::getDefaultPeopleDetector_64x128() { throw_nogpu(); return std::vector<float>(); }
 
 #else
 
@@ -309,6 +310,11 @@ cv::Size cv::gpu::HOGDescriptor::numPartsWithin(cv::Size size, cv::Size part_siz
 }
 
 std::vector<float> cv::gpu::HOGDescriptor::getDefaultPeopleDetector()
+{
+    return getDefaultPeopleDetector_64x128();
+}
+
+std::vector<float> cv::gpu::HOGDescriptor::getDefaultPeopleDetector_64x128()
 {
     static const float detector[] = {
        0.05359386f, -0.14721455f, -0.05532170f, 0.05077307f,

tests/gpu/src/hog.cpp

@@ -109,6 +109,8 @@ struct CV_GpuHogTest : public CvTest
 
         cv::gpu::HOGDescriptor hog;
         hog.setSVMDetector(cv::gpu::HOGDescriptor::getDefaultPeopleDetector());
+        //cpu detector may be updated soon
+        //hog.setSVMDetector(cv::HOGDescriptor::getDefaultPeopleDetector());
 
         std::vector<cv::Point> locations;