fixed contrib code to match the HAL

modules/optflow/src/motempl.cpp

@@ -212,7 +212,7 @@ void calcMotionGradient( InputArray _mhi, OutputArray _mask,
         float* orient_row = orient.ptr<float>(y);
         uchar* mask_row = mask.ptr<uchar>(y);
 
-        fastAtan2(dY_max_row, dX_min_row, orient_row, size.width, true);
+        hal::fastAtan2(dY_max_row, dX_min_row, orient_row, size.width, true);
 
         // make orientation zero where the gradient is very small
         for( x = 0; x < size.width; x++ )

modules/rgbd/src/depth_to_3d.h

@@ -81,7 +81,7 @@ convertDepthToFloat(const cv::Mat& depth, const cv::Mat& mask, float scale, cv::
         v_mat((int)n_points, 0) = (float)v;
         T depth_i = depth.at<T>(v, u);
 
-        if (cvIsNaN(depth_i) || (depth_i == std::numeric_limits<T>::min()) || (depth_i == std::numeric_limits<T>::max()))
+        if (cvIsNaN((float)depth_i) || (depth_i == std::numeric_limits<T>::min()) || (depth_i == std::numeric_limits<T>::max()))
           z_mat((int)n_points, 0) = std::numeric_limits<float>::quiet_NaN();
         else
           z_mat((int)n_points, 0) = depth_i * scale;
@@ -111,7 +111,7 @@ convertDepthToFloat(const cv::Mat& depth, float scale, const cv::Mat &uv_mat, cv
   {
     T depth_i = depth.at < T > ((int)(*uv_iter)[1], (int)(*uv_iter)[0]);
 
-    if (cvIsNaN(depth_i) || (depth_i == std::numeric_limits < T > ::min())
+    if (cvIsNaN((float)depth_i) || (depth_i == std::numeric_limits < T > ::min())
         || (depth_i == std::numeric_limits < T > ::max()))
       *z_mat_iter = std::numeric_limits<float>::quiet_NaN();
     else

modules/xfeatures2d/src/sift.cpp

@@ -337,9 +337,9 @@ static float calcOrientationHist( const Mat& img, Point pt, int radius,
     len = k;
 
     // compute gradient values, orientations and the weights over the pixel neighborhood
-    exp(W, W, len);
-    fastAtan2(Y, X, Ori, len, true);
-    magnitude(X, Y, Mag, len);
+    hal::exp(W, W, len);
+    hal::fastAtan2(Y, X, Ori, len, true);
+    hal::magnitude(X, Y, Mag, len);
 
     for( k = 0; k < len; k++ )
     {
@@ -620,9 +620,9 @@ static void calcSIFTDescriptor( const Mat& img, Point2f ptf, float ori, float sc
         }
 
     len = k;
-    fastAtan2(Y, X, Ori, len, true);
-    magnitude(X, Y, Mag, len);
-    exp(W, W, len);
+    hal::fastAtan2(Y, X, Ori, len, true);
+    hal::magnitude(X, Y, Mag, len);
+    hal::exp(W, W, len);
 
     for( k = 0; k < len; k++ )
     {