Merge pull request #2715 from akarsakov:fix_corner_min_eigen

modules/imgproc/src/corner.cpp

@@ -460,7 +460,6 @@ void cv::cornerMinEigenVal( InputArray _src, OutputArray _dst, int blockSize, in
     Mat src = _src.getMat();
     _dst.create( src.size(), CV_32FC1 );
     Mat dst = _dst.getMat();
-
 #if defined(HAVE_IPP) && !defined(HAVE_IPP_ICV_ONLY) && (IPP_VERSION_MAJOR >= 8)
     typedef IppStatus (CV_STDCALL * ippiMinEigenValGetBufferSize)(IppiSize, int, int, int*);
     typedef IppStatus (CV_STDCALL * ippiMinEigenVal)(const void*, int, Ipp32f*, int, IppiSize, IppiKernelType, int, int, Ipp8u*);
@@ -477,7 +476,7 @@ void cv::cornerMinEigenVal( InputArray _src, OutputArray _dst, int blockSize, in
     bool isolated = (borderType & BORDER_ISOLATED) != 0;
     int borderTypeNI = borderType & ~BORDER_ISOLATED;
     if ((borderTypeNI == BORDER_REPLICATE && (!src.isSubmatrix() || isolated)) &&
-        (kerSize == 3 || kerSize == 5) && (kerSize == 3 || blockSize == 5))
+        (kerSize == 3 || kerSize == 5) && (blockSize == 3 || blockSize == 5))
     {
         ippiMinEigenValGetBufferSize getBufferSizeFunc = 0;
         ippiMinEigenVal minEigenValFunc = 0;
@@ -494,12 +493,13 @@ void cv::cornerMinEigenVal( InputArray _src, OutputArray _dst, int blockSize, in
             minEigenValFunc = (ippiMinEigenVal) ippiMinEigenVal_32f_C1R;
             norm_coef = 255.f;
         }
+        norm_coef = kerType == ippKernelSobel ? norm_coef : norm_coef / 2.45f;
 
         if (getBufferSizeFunc && minEigenValFunc)
         {
             int bufferSize;
             IppiSize srcRoi = { src.cols, src.rows };
-            IppStatus ok = getBufferSizeFunc(srcRoi, ksize, blockSize, &bufferSize);
+            IppStatus ok = getBufferSizeFunc(srcRoi, kerSize, blockSize, &bufferSize);
             if (ok >= 0)
             {
                 AutoBuffer<uchar> buffer(bufferSize);