Merge pull request #25563 from asmorkalov:as/HAL_min_max_idx

Transform offset to indeces for MatND in minMaxIdx HAL #25563

Address comments in https://github.com/opencv/opencv/pull/25553

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/core/test/test_arithm.cpp

@@ -2446,6 +2446,32 @@ TEST(Core_minMaxIdx, regression_9207_2)
     EXPECT_EQ(14, maxIdx[1]);
 }
 
+TEST(Core_MinMaxIdx, MatND)
+{
+    const int shape[3] = {5,5,3};
+    cv::Mat src = cv::Mat(3, shape, CV_8UC1);
+    src.setTo(1);
+    src.data[1] = 0;
+    src.data[5*5*3-2] = 2;
+
+    int minIdx[3];
+    int maxIdx[3];
+    double minVal, maxVal;
+
+    cv::minMaxIdx(src, &minVal, &maxVal, minIdx, maxIdx);
+
+    EXPECT_EQ(0, minVal);
+    EXPECT_EQ(2, maxVal);
+
+    EXPECT_EQ(0, minIdx[0]);
+    EXPECT_EQ(0, minIdx[1]);
+    EXPECT_EQ(1, minIdx[2]);
+
+    EXPECT_EQ(4, maxIdx[0]);
+    EXPECT_EQ(4, maxIdx[1]);
+    EXPECT_EQ(1, maxIdx[2]);
+}
+
 TEST(Core_Set, regression_11044)
 {
     Mat testFloat(Size(3, 3), CV_32FC1);
@@ -2807,7 +2833,6 @@ TEST(Core_MinMaxIdx, rows_overflow)
     }
 }
 
-
 TEST(Core_Magnitude, regression_19506)
 {
     for (int N = 1; N <= 64; ++N)