Created perf tests for cvtColor_toBGR565, cvtColor_C3toC4_and_back, split, merge.

modules/core/perf/perf_merge.cpp

+#include "perf_precomp.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace perf;
+using std::tr1::make_tuple;
+using std::tr1::get;
+
+typedef std::tr1::tuple<Size, int, int> Size_SrcDepth_DstChannels_t;
+typedef perf::TestBaseWithParam<Size_SrcDepth_DstChannels_t> Size_SrcDepth_DstChannels;
+
+PERF_TEST_P( Size_SrcDepth_DstChannels, merge,
+             testing::Combine
+             (
+                 testing::Values(TYPICAL_MAT_SIZES),
+                 testing::Values(CV_8U, CV_16S, CV_32S, CV_32F, CV_64F),
+                 testing::Values(2, 3, 4)
+             )
+           )
+{
+    Size sz = get<0>(GetParam());
+    int srcDepth = get<1>(GetParam());
+    int dstChannels = get<2>(GetParam());
+
+    vector<Mat> mv;
+    for( int i = 0; i < dstChannels; ++i )
+    {
+        mv.push_back( Mat(sz, CV_MAKETYPE(srcDepth, 1)) );
+        randu(mv[i], 0, 255);
+    }
+    
+    Mat dst;
+    TEST_CYCLE() merge( (vector<Mat> &)mv, dst );
+
+    SANITY_CHECK(dst);
+}
\ No newline at end of file

modules/core/perf/perf_split.cpp

+#include "perf_precomp.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace perf;
+using std::tr1::make_tuple;
+using std::tr1::get;
+
+typedef std::tr1::tuple<Size, int, int> Size_Depth_Channels_t;
+typedef perf::TestBaseWithParam<Size_Depth_Channels_t> Size_Depth_Channels;
+
+PERF_TEST_P( Size_Depth_Channels, split,
+             testing::Combine
+             (
+                 testing::Values(TYPICAL_MAT_SIZES),
+                 testing::Values(CV_8U, CV_16S, CV_32F, CV_64F),
+                 testing::Values(2, 3, 4)
+             )
+           )
+{
+    Size sz = get<0>(GetParam());
+    int depth = get<1>(GetParam());
+    int channels = get<2>(GetParam());
+
+    Mat m(sz, CV_MAKETYPE(depth, channels));    
+    randu(m, 0, 255);
+
+    vector<Mat> mv;
+
+    TEST_CYCLE() split(m, (vector<Mat>&)mv);
+
+    SANITY_CHECK(mv);
+}