[moved from opencv] cuda::polarToCart: test double precision and tune tolerance

original commit: https://github.com/opencv/opencv/commit/99326123733dfa9a24cc8c1dac4bc402310e0b06

modules/cudaarithm/perf/perf_element_operations.cpp

@@ -1346,6 +1346,7 @@ PERF_TEST_P(Sz, MagnitudeSqr,
 // Phase
 
 DEF_PARAM_TEST(Sz_AngleInDegrees, cv::Size, bool);
+DEF_PARAM_TEST(Sz_Type_AngleInDegrees, cv::Size, MatType, bool);
 
 PERF_TEST_P(Sz_AngleInDegrees, Phase,
             Combine(CUDA_TYPICAL_MAT_SIZES,
@@ -1423,17 +1424,19 @@ PERF_TEST_P(Sz_AngleInDegrees, CartToPolar,
 //////////////////////////////////////////////////////////////////////
 // PolarToCart
 
-PERF_TEST_P(Sz_AngleInDegrees, PolarToCart,
+PERF_TEST_P(Sz_Type_AngleInDegrees, PolarToCart,
             Combine(CUDA_TYPICAL_MAT_SIZES,
+                    testing::Values(CV_32FC1, CV_64FC1),
                     Bool()))
 {
     const cv::Size size = GET_PARAM(0);
-    const bool angleInDegrees = GET_PARAM(1);
+    const int type = GET_PARAM(1);
+    const bool angleInDegrees = GET_PARAM(2);
 
-    cv::Mat magnitude(size, CV_32FC1);
+    cv::Mat magnitude(size, type);
     declare.in(magnitude, WARMUP_RNG);
 
-    cv::Mat angle(size, CV_32FC1);
+    cv::Mat angle(size, type);
     declare.in(angle, WARMUP_RNG);
 
     if (PERF_RUN_CUDA())

modules/cudaarithm/test/test_element_operations.cpp

@@ -2754,10 +2754,11 @@ INSTANTIATE_TEST_CASE_P(CUDA_Arithm, CartToPolar, testing::Combine(
 ////////////////////////////////////////////////////////////////////////////////
 // polarToCart
 
-PARAM_TEST_CASE(PolarToCart, cv::cuda::DeviceInfo, cv::Size, AngleInDegrees, UseRoi)
+PARAM_TEST_CASE(PolarToCart, cv::cuda::DeviceInfo, cv::Size, MatType, AngleInDegrees, UseRoi)
 {
     cv::cuda::DeviceInfo devInfo;
     cv::Size size;
+    int type;
     bool angleInDegrees;
     bool useRoi;
 
@@ -2765,8 +2766,9 @@ PARAM_TEST_CASE(PolarToCart, cv::cuda::DeviceInfo, cv::Size, AngleInDegrees, Use
     {
         devInfo = GET_PARAM(0);
         size = GET_PARAM(1);
-        angleInDegrees = GET_PARAM(2);
-        useRoi = GET_PARAM(3);
+        type = GET_PARAM(2);
+        angleInDegrees = GET_PARAM(3);
+        useRoi = GET_PARAM(4);
 
         cv::cuda::setDevice(devInfo.deviceID());
     }
@@ -2774,24 +2776,26 @@ PARAM_TEST_CASE(PolarToCart, cv::cuda::DeviceInfo, cv::Size, AngleInDegrees, Use
 
 CUDA_TEST_P(PolarToCart, Accuracy)
 {
-    cv::Mat magnitude = randomMat(size, CV_32FC1);
-    cv::Mat angle = randomMat(size, CV_32FC1);
+    cv::Mat magnitude = randomMat(size, type);
+    cv::Mat angle = randomMat(size, type);
+    const double tol = (type == CV_32FC1 ? 1.6e-4 : 1e-4) * (angleInDegrees ? 1.0 : 19.0);
 
-    cv::cuda::GpuMat x = createMat(size, CV_32FC1, useRoi);
-    cv::cuda::GpuMat y = createMat(size, CV_32FC1, useRoi);
+    cv::cuda::GpuMat x = createMat(size, type, useRoi);
+    cv::cuda::GpuMat y = createMat(size, type, useRoi);
     cv::cuda::polarToCart(loadMat(magnitude, useRoi), loadMat(angle, useRoi), x, y, angleInDegrees);
 
     cv::Mat x_gold;
     cv::Mat y_gold;
     cv::polarToCart(magnitude, angle, x_gold, y_gold, angleInDegrees);
 
-    EXPECT_MAT_NEAR(x_gold, x, 1e-4);
-    EXPECT_MAT_NEAR(y_gold, y, 1e-4);
+    EXPECT_MAT_NEAR(x_gold, x, tol);
+    EXPECT_MAT_NEAR(y_gold, y, tol);
 }
 
 INSTANTIATE_TEST_CASE_P(CUDA_Arithm, PolarToCart, testing::Combine(
     ALL_DEVICES,
     DIFFERENT_SIZES,
+    testing::Values(CV_32FC1, CV_64FC1),
     testing::Values(AngleInDegrees(false), AngleInDegrees(true)),
     WHOLE_SUBMAT));