diff --git a/modules/core/perf/pert_convertTo.cpp b/modules/core/perf/perf_convertTo.cpp
similarity index 55%
rename from modules/core/perf/pert_convertTo.cpp
rename to modules/core/perf/perf_convertTo.cpp
index ba320f5feb..6eaed4a10f 100644
--- a/modules/core/perf/pert_convertTo.cpp
+++ b/modules/core/perf/perf_convertTo.cpp
@@ -12,25 +12,25 @@ typedef perf::TestBaseWithParam<Size_DepthSrc_DepthDst_Channels_alpha_t> Size_De
 PERF_TEST_P( Size_DepthSrc_DepthDst_Channels_alpha, convertTo,
              testing::Combine
              (
-                 testing::Values(TYPICAL_MAT_SIZES),
-                 testing::Values(CV_8U, CV_16S, CV_32S, CV_32F),
-				 testing::Values(CV_8U, CV_16S, CV_32F, CV_64F),
-                 testing::Values(1, 2, 3, 4),
-				 testing::Values(1.0, 1./255)
+                 testing::Values(szVGA, sz1080p),
+                 testing::Values(CV_8U, CV_8S, CV_16U, CV_16S, CV_32S, CV_32F, CV_64F),
+                 testing::Values(CV_8U, CV_8S, CV_16U, CV_16S, CV_32S, CV_32F, CV_64F),
+                 testing::Values(1, 4),
+                 testing::Values(1.0, 1./255)
              )
            )
 {
     Size sz = get<0>(GetParam());
     int depthSrc = get<1>(GetParam());
-	int depthDst = get<2>(GetParam());
+    int depthDst = get<2>(GetParam());
     int channels = get<3>(GetParam());
-	double alpha = get<4>(GetParam());
+    double alpha = get<4>(GetParam());
 
     Mat src(sz, CV_MAKETYPE(depthSrc, channels));  
-	randu(src, 0, 255);
-	Mat dst(sz, CV_MAKETYPE(depthDst, channels)); 
+    randu(src, 0, 255);
+    Mat dst(sz, CV_MAKETYPE(depthDst, channels));
 
-	TEST_CYCLE() src.convertTo(dst, depthDst, alpha);
+    TEST_CYCLE() src.convertTo(dst, depthDst, alpha);
 
     SANITY_CHECK(dst);
-}
\ No newline at end of file
+}
diff --git a/modules/core/src/convert.cpp b/modules/core/src/convert.cpp
index c5e2762af2..b58c4f14bf 100644
--- a/modules/core/src/convert.cpp
+++ b/modules/core/src/convert.cpp
@@ -919,27 +919,27 @@ static BinaryFunc cvtTab[][8] =
 {
     {
         (BinaryFunc)cvt8u, (BinaryFunc)GET_OPTIMIZED(cvt8s8u), (BinaryFunc)GET_OPTIMIZED(cvt16u8u),
-        (BinaryFunc)GET_OPTIMIZED(cvt16s8u), (BinaryFunc)GET_OPTIMIZED(cvt32s8u), (BinaryFunc)(cvt32f8u),
+        (BinaryFunc)GET_OPTIMIZED(cvt16s8u), (BinaryFunc)GET_OPTIMIZED(cvt32s8u), (BinaryFunc)GET_OPTIMIZED(cvt32f8u),
         (BinaryFunc)cvt64f8u, 0
     },
     {
         (BinaryFunc)GET_OPTIMIZED(cvt8u8s), (BinaryFunc)cvt8u, (BinaryFunc)GET_OPTIMIZED(cvt16u8s),
-        (BinaryFunc)GET_OPTIMIZED(cvt16s8s), (BinaryFunc)GET_OPTIMIZED(cvt32s8s), (BinaryFunc)(cvt32f8s),
+        (BinaryFunc)GET_OPTIMIZED(cvt16s8s), (BinaryFunc)GET_OPTIMIZED(cvt32s8s), (BinaryFunc)GET_OPTIMIZED(cvt32f8s),
         (BinaryFunc)cvt64f8s, 0
     },
     {
         (BinaryFunc)GET_OPTIMIZED(cvt8u16u), (BinaryFunc)GET_OPTIMIZED(cvt8s16u), (BinaryFunc)cvt16u,
-        (BinaryFunc)GET_OPTIMIZED(cvt16s16u), (BinaryFunc)GET_OPTIMIZED(cvt32s16u), (BinaryFunc)(cvt32f16u),
+        (BinaryFunc)GET_OPTIMIZED(cvt16s16u), (BinaryFunc)GET_OPTIMIZED(cvt32s16u), (BinaryFunc)GET_OPTIMIZED(cvt32f16u),
         (BinaryFunc)cvt64f16u, 0
     },
     {
         (BinaryFunc)GET_OPTIMIZED(cvt8u16s), (BinaryFunc)GET_OPTIMIZED(cvt8s16s), (BinaryFunc)GET_OPTIMIZED(cvt16u16s),
-        (BinaryFunc)cvt16u, (BinaryFunc)GET_OPTIMIZED(cvt32s16s), (BinaryFunc)(cvt32f16s),
+        (BinaryFunc)cvt16u, (BinaryFunc)GET_OPTIMIZED(cvt32s16s), (BinaryFunc)GET_OPTIMIZED(cvt32f16s),
         (BinaryFunc)cvt64f16s, 0
     },
     {
         (BinaryFunc)GET_OPTIMIZED(cvt8u32s), (BinaryFunc)GET_OPTIMIZED(cvt8s32s), (BinaryFunc)GET_OPTIMIZED(cvt16u32s),
-        (BinaryFunc)GET_OPTIMIZED(cvt16s32s), (BinaryFunc)cvt32s, (BinaryFunc)(cvt32f32s),
+        (BinaryFunc)GET_OPTIMIZED(cvt16s32s), (BinaryFunc)cvt32s, (BinaryFunc)GET_OPTIMIZED(cvt32f32s),
         (BinaryFunc)cvt64f32s, 0
     },
     {