Merge pull request #28075 from abhishek-gola:hann-hamming-blackman-support

Added Hannwindow, Hammingwindow & Blackmanwindow support #28075

### 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
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

modules/dnn/include/opencv2/dnn/all_layers.hpp

@@ -1324,6 +1324,24 @@ CV__DNN_INLINE_NS_BEGIN
         static Ptr<SizeLayer> create(const LayerParams &params);
     };
 
+    class CV_EXPORTS BlackmanWindowLayer : public Layer
+    {
+    public:
+        static Ptr<BlackmanWindowLayer> create(const LayerParams &params);
+    };
+
+    class CV_EXPORTS HannWindowLayer : public Layer
+    {
+    public:
+        static Ptr<HannWindowLayer> create(const LayerParams &params);
+    };
+
+    class CV_EXPORTS HammingWindowLayer : public Layer
+    {
+    public:
+        static Ptr<HammingWindowLayer> create(const LayerParams &params);
+    };
+
     class CV_EXPORTS DetLayer : public Layer
     {
     public: