Move maxval to threshold tests parameter

Fix documentation

modules/gapi/include/opencv2/gapi/core.hpp

@@ -1275,8 +1275,8 @@ GAPI_EXPORTS std::tuple<GMat, GMat> integral(const GMat& src, int sdepth = -1, i
 The function applies fixed-level thresholding to a single- or multiple-channel matrix.
 The function is typically used to get a bi-level (binary) image out of a grayscale image ( cmp functions could be also used for
 this purpose) or for removing a noise, that is, filtering out pixels with too small or too large
-values. There are several depths of thresholding supported by the function. They are determined by
-depth parameter.
+values. There are several types of thresholding supported by the function. They are determined by
+type parameter.
 
 Also, the special values cv::THRESH_OTSU or cv::THRESH_TRIANGLE may be combined with one of the
 above values. In these cases, the function determines the optimal threshold value using the Otsu's
@@ -1292,17 +1292,17 @@ Output matrix must be of the same size and depth as src.
 @param src input matrix (@ref CV_8UC1, @ref CV_8UC3, or @ref CV_32FC1).
 @param thresh threshold value.
 @param maxval maximum value to use with the cv::THRESH_BINARY and cv::THRESH_BINARY_INV thresholding
-depths.
-@param depth thresholding depth (see the cv::ThresholdTypes).
+types.
+@param type thresholding type (see the cv::ThresholdTypes).
 
 @sa min, max, cmpGT, cmpLE, cmpGE, cmpLS
  */
-GAPI_EXPORTS GMat threshold(const GMat& src, const GScalar& thresh, const GScalar& maxval, int depth);
+GAPI_EXPORTS GMat threshold(const GMat& src, const GScalar& thresh, const GScalar& maxval, int type);
 /** @overload
-This function applicable for all threshold depths except CV_THRESH_OTSU and CV_THRESH_TRIANGLE
+This function applicable for all threshold types except CV_THRESH_OTSU and CV_THRESH_TRIANGLE
 @note Function textual ID is "org.opencv.core.matrixop.thresholdOT"
 */
-GAPI_EXPORTS std::tuple<GMat, GScalar> threshold(const GMat& src, const GScalar& maxval, int depth);
+GAPI_EXPORTS std::tuple<GMat, GScalar> threshold(const GMat& src, const GScalar& maxval, int type);
 
 /** @brief Applies a range-level threshold to each matrix element.
 

modules/gapi/test/common/gapi_core_tests.hpp

@@ -100,7 +100,7 @@ GAPI_TEST_FIXTURE(AddWeightedTest, initMatsRandU, FIXTURE_API(CompareMats), 1, c
 GAPI_TEST_FIXTURE(NormTest, initMatrixRandU, FIXTURE_API(CompareScalars,NormTypes), 2,
     cmpF, opType)
 GAPI_TEST_FIXTURE(IntegralTest, initNothing, <>, 0)
-GAPI_TEST_FIXTURE(ThresholdTest, initMatrixRandU, FIXTURE_API(int), 1, tt)
+GAPI_TEST_FIXTURE(ThresholdTest, initMatrixRandU, FIXTURE_API(int, cv::Scalar), 2, tt, maxval)
 GAPI_TEST_FIXTURE(ThresholdOTTest, initMatrixRandU, FIXTURE_API(int), 1, tt)
 GAPI_TEST_FIXTURE(InRangeTest, initMatrixRandU, <>, 0)
 GAPI_TEST_FIXTURE(Split3Test, initMatrixRandU, <>, 0)

modules/gapi/test/common/gapi_core_tests_inl.hpp

@@ -682,7 +682,6 @@ TEST_P(IntegralTest, AccuracyTest)
 TEST_P(ThresholdTest, AccuracyTestBinary)
 {
     cv::Scalar thr = initScalarRandU(50);
-    cv::Scalar maxval = initScalarRandU(50) + cv::Scalar(50, 50, 50, 50);
     cv::Scalar out_scalar;
 
     // G-API code //////////////////////////////////////////////////////////////

modules/gapi/test/cpu/gapi_core_tests_cpu.cpp

@@ -251,7 +251,10 @@ INSTANTIATE_TEST_CASE_P(ThresholdTestCPU, ThresholdTest,
                                 Values(-1),
                                 Values(CORE_CPU),
                                 Values(cv::THRESH_BINARY, cv::THRESH_BINARY_INV, cv::THRESH_TRUNC,
-                                    cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV)));
+                                       cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV),
+                                Values(cv::Scalar(0, 0, 0, 0),
+                                       cv::Scalar(100, 100, 100, 100),
+                                       cv::Scalar(255, 255, 255, 255))));
 
 INSTANTIATE_TEST_CASE_P(ThresholdTestCPU, ThresholdOTTest,
                         Combine(Values(CV_8UC1),

modules/gapi/test/cpu/gapi_core_tests_fluid.cpp

@@ -226,7 +226,10 @@ INSTANTIATE_TEST_CASE_P(ThresholdTestFluid, ThresholdTest,
                                 Values(CORE_FLUID),
                                 Values(cv::THRESH_BINARY, cv::THRESH_BINARY_INV,
                                        cv::THRESH_TRUNC,
-                                       cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV)));
+                                       cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV),
+                                Values(cv::Scalar(0, 0, 0, 0),
+                                       cv::Scalar(100, 100, 100, 100),
+                                       cv::Scalar(255, 255, 255, 255))));
 
 INSTANTIATE_TEST_CASE_P(InRangeTestFluid, InRangeTest,
                         Combine(Values(CV_8UC3, CV_8UC1, CV_16UC1, CV_16SC1, CV_32FC1),

modules/gapi/test/gpu/gapi_core_tests_gpu.cpp

@@ -234,7 +234,10 @@ INSTANTIATE_TEST_CASE_P(ThresholdTestGPU, ThresholdTest,
                                 Values(-1),
                                 Values(CORE_GPU),
                                 Values(cv::THRESH_BINARY, cv::THRESH_BINARY_INV, cv::THRESH_TRUNC,
-                                    cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV)));
+                                       cv::THRESH_TOZERO, cv::THRESH_TOZERO_INV),
+                                Values(cv::Scalar(0, 0, 0, 0),
+                                       cv::Scalar(100, 100, 100, 100),
+                                       cv::Scalar(255, 255, 255, 255))));
 
 INSTANTIATE_TEST_CASE_P(ThresholdTestGPU, ThresholdOTTest,
                         Combine(Values(CV_8UC1),