imgproc: add CreateHanningWindow()

Signed-off-by: deadprogram <[email protected]>

ROADMAP.md

@@ -83,8 +83,8 @@ Your pull requests will be greatly appreciated!
  - [ ] [rotatedRectangleIntersection](https://docs.opencv.org/master/d3/dc0/group__imgproc__shape.html#ga8740e7645628c59d238b0b22c2abe2d4)
 
  - [ ] **Motion Analysis and Object Tracking - WORK STARTED** The following functions still need implementation:
- - [ ] [createHanningWindow](https://docs.opencv.org/master/d7/df3/group__imgproc__motion.html#ga80e5c3de52f6bab3a7c1e60e89308e1b)
- - [ ] [phaseCorrelate](https://docs.opencv.org/master/d7/df3/group__imgproc__motion.html#ga552420a2ace9ef3fb053cd630fdb4952)
+ - [X] [createHanningWindow](https://docs.opencv.org/master/d7/df3/group__imgproc__motion.html#ga80e5c3de52f6bab3a7c1e60e89308e1b)
+ - [X] [phaseCorrelate](https://docs.opencv.org/master/d7/df3/group__imgproc__motion.html#ga552420a2ace9ef3fb053cd630fdb4952)
 
  - [ ] **Feature Detection - WORK STARTED** The following functions still need implementation:
  - [ ] [cornerEigenValsAndVecs](https://docs.opencv.org/master/dd/d1a/group__imgproc__feature.html#ga4055896d9ef77dd3cacf2c5f60e13f1c)

imgproc.cpp

@@ -643,6 +643,11 @@ Point2f PhaseCorrelate(Mat src1, Mat src2, Mat window, double* response) {
  return result2f;
 }
 
+void CreateHanningWindow(Mat dst, Size size, int typ) {
+ cv::Size sz(size.width, size.height);
+ cv::createHanningWindow(*dst, sz, typ);
+}
+
 void Mat_Accumulate(Mat src, Mat dst) {
  cv::accumulate(*src, *dst);
 }

imgproc.go

@@ -1921,6 +1921,19 @@ func PhaseCorrelate(src1, src2, window Mat) (phaseShift Point2f, response float6
  }, float64(responseDouble)
 }
 
+// CreateHanningWindow computes a Hanning window coefficients in two dimensions.
+//
+// For further details, please see:
+// https://docs.opencv.org/4.x/d7/df3/group__imgproc__motion.html#ga80e5c3de52f6bab3a7c1e60e89308e1b
+func CreateHanningWindow(img *Mat, size image.Point, typ MatType) {
+ sz := C.struct_Size{
+ width: C.int(size.X),
+ height: C.int(size.Y),
+ }
+
+ C.CreateHanningWindow(img.p, sz, C.int(typ))
+}
+
 // ToImage converts a Mat to a image.Image.
 func (m *Mat) ToImage() (image.Image, error) {
  switch m.Type() {

imgproc.h

@@ -132,6 +132,7 @@ void CLAHE_Close(CLAHE c);
 void CLAHE_Apply(CLAHE c, Mat src, Mat dst);
 void InvertAffineTransform(Mat src, Mat dst);
 Point2f PhaseCorrelate(Mat src1, Mat src2, Mat window, double* response);
+void CreateHanningWindow(Mat dst, Size size, int typ);
 void Mat_Accumulate(Mat src, Mat dst);
 void Mat_AccumulateWithMask(Mat src, Mat dst, Mat mask);
 void Mat_AccumulateSquare(Mat src, Mat dst);

imgproc_test.go

@@ -2464,6 +2464,17 @@ func TestPhaseCorrelate(t *testing.T) {
  }
 }
 
+func TestCreateHanningWindow(t *testing.T) {
+ dst := NewMat()
+ defer dst.Close()
+
+ CreateHanningWindow(&dst, image.Pt(100, 100), MatTypeCV32F)
+
+ if dst.Empty() {
+ t.Error("Invalid CreateHanningWindow test")
+ }
+}
+
 func TestMatToImage(t *testing.T) {
  mat1 := NewMatWithSize(101, 102, MatTypeCV8UC3)
  defer mat1.Close()