Enable ipp MeanStdDev calculation for 32F_C1 images. Decrease accuracy sanity...

Enable ipp MeanStdDev calculation for 32F_C1 images. Decrease accuracy sanity check of the perfomance test

modules/core/perf/perf_stat.cpp

@@ -65,8 +65,8 @@ PERF_TEST_P(Size_MatType, meanStdDev, TYPICAL_MATS)
 
     TEST_CYCLE() meanStdDev(src, mean, dev);
 
-    SANITY_CHECK(mean, 1e-6);
-    SANITY_CHECK(dev, 1e-6);
+    SANITY_CHECK(mean, 1e-5, ERROR_RELATIVE);
+    SANITY_CHECK(dev, 1e-5, ERROR_RELATIVE);
 }
 
 PERF_TEST_P(Size_MatType, meanStdDev_mask, TYPICAL_MATS)

modules/core/src/stat.cpp

@@ -972,7 +972,7 @@ void cv::meanStdDev( InputArray _src, OutputArray _mean, OutputArray _sdv, Input
             ippicviMeanStdDevFuncC1 ippFuncC1 =
             type == CV_8UC1 ? (ippicviMeanStdDevFuncC1)ippicviMean_StdDev_8u_C1R :
             type == CV_16UC1 ? (ippicviMeanStdDevFuncC1)ippicviMean_StdDev_16u_C1R :
-            //type == CV_32FC1 ? (ippicviMeanStdDevFuncC1)ippicviMean_StdDev_32f_C1R ://Aug 2013: bug in IPP 7.1, 8.0
+            type == CV_32FC1 ? (ippicviMeanStdDevFuncC1)ippicviMean_StdDev_32f_C1R ://Aug 2013: bug in IPP 7.1, 8.0
             0;
             if( ippFuncC1 )
             {