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new file mode 100644
index 00000000..d6456956
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+++ b/models/object_detection_nanodet/LICENSE
@@ -0,0 +1,202 @@
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diff --git a/models/object_detection_nanodet/NanodetPlus.py b/models/object_detection_nanodet/NanodetPlus.py
new file mode 100644
index 00000000..240c9d6a
--- /dev/null
+++ b/models/object_detection_nanodet/NanodetPlus.py
@@ -0,0 +1,129 @@
+import cv2
+import numpy as np
+
+class NanoDet():
+    def __init__(self, modelPath, prob_threshold=0.35, iou_threshold=0.6):
+        self.strides = (8, 16, 32, 64)
+        self.image_shape = (416, 416)
+        self.reg_max = 7
+        self.prob_threshold = prob_threshold
+        self.iou_threshold = iou_threshold
+        self.project = np.arange(self.reg_max + 1)
+        self.mean = np.array([103.53, 116.28, 123.675], dtype=np.float32).reshape(1, 1, 3)
+        self.std = np.array([57.375, 57.12, 58.395], dtype=np.float32).reshape(1, 1, 3)
+        self.net = cv2.dnn.readNet(modelPath)
+
+        self.anchors_mlvl = []
+        for i in range(len(self.strides)):
+            featmap_size = (int(self.image_shape[0] / self.strides[i]), int(self.image_shape[1] / self.strides[i]))
+            stride = self.strides[i]
+            feat_h, feat_w = featmap_size
+            shift_x = np.arange(0, feat_w) * stride
+            shift_y = np.arange(0, feat_h) * stride
+            xv, yv = np.meshgrid(shift_x, shift_y)
+            xv = xv.flatten()
+            yv = yv.flatten()
+            cx = xv + 0.5 * (stride-1)
+            cy = yv + 0.5 * (stride - 1)
+            #anchors = np.stack((cx, cy), axis=-1)
+            anchors = np.column_stack((cx, cy))
+            self.anchors_mlvl.append(anchors)
+
+    def pre_process(self, srcimg, keep_ratio=True):
+        top, left, newh, neww = 0, 0, self.image_shape[0], self.image_shape[1]
+        if keep_ratio and srcimg.shape[0] != srcimg.shape[1]:
+            hw_scale = srcimg.shape[0] / srcimg.shape[1]
+            if hw_scale > 1:
+                newh, neww = self.image_shape[0], int(self.image_shape[1] / hw_scale)
+                img = cv2.resize(srcimg, (neww, newh), interpolation=cv2.INTER_AREA)
+                left = int((self.image_shape[1] - neww) * 0.5)
+                img = cv2.copyMakeBorder(img, 0, 0, left, self.image_shape[1] - neww - left, cv2.BORDER_CONSTANT,
+                                         value=0)  # add border
+            else:
+                newh, neww = int(self.image_shape[0] * hw_scale), self.image_shape[1]
+                img = cv2.resize(srcimg, (neww, newh), interpolation=cv2.INTER_AREA)
+                top = int((self.image_shape[0] - newh) * 0.5)
+                img = cv2.copyMakeBorder(img, top, self.image_shape[0] - newh - top, 0, 0, cv2.BORDER_CONSTANT, value=0)
+        else:
+            img = cv2.resize(srcimg, self.image_shape, interpolation=cv2.INTER_AREA)
+
+        img = img.astype(np.float32)
+        img = (img - self.mean) / self.std
+        blob = cv2.dnn.blobFromImage(img)
+        return blob
+
+    def infer(self, srcimg):
+        blob = self.pre_process(srcimg)
+        self.net.setInput(blob)
+        outs = self.net.forward(self.net.getUnconnectedOutLayersNames())
+        det_bboxes, det_conf, det_classid = self.post_process(outs)
+        preds = [det_bboxes, det_conf, det_classid]
+        return preds
+
+    def post_process(self, preds):
+        cls_scores, bbox_preds = preds[::2], preds[1::2]
+        rescale = False
+        scale_factor = 1
+        bboxes_mlvl = []
+        scores_mlvl = []
+        for stride, cls_score, bbox_pred, anchors in zip(self.strides, cls_scores, bbox_preds, self.anchors_mlvl):
+            if cls_score.ndim==3:
+                cls_score = cls_score.squeeze(axis=0)
+            if bbox_pred.ndim==3:
+                bbox_pred = bbox_pred.squeeze(axis=0)
+
+            x_exp = np.exp(bbox_pred.reshape(-1, self.reg_max + 1))
+            x_sum = np.sum(x_exp, axis=1, keepdims=True)
+            bbox_pred = x_exp / x_sum
+            bbox_pred = np.dot(bbox_pred, self.project).reshape(-1,4)
+            bbox_pred *= stride
+
+            nms_pre = 1000
+            if nms_pre > 0 and cls_score.shape[0] > nms_pre:
+                max_scores = cls_score.max(axis=1)
+                topk_inds = max_scores.argsort()[::-1][0:nms_pre]
+                anchors = anchors[topk_inds, :]
+                bbox_pred = bbox_pred[topk_inds, :]
+                cls_score = cls_score[topk_inds, :]
+
+            points = anchors
+            distance = bbox_pred
+            max_shape=self.image_shape
+            x1 = points[:, 0] - distance[:, 0]
+            y1 = points[:, 1] - distance[:, 1]
+            x2 = points[:, 0] + distance[:, 2]
+            y2 = points[:, 1] + distance[:, 3]
+
+            if max_shape is not None:
+                x1 = np.clip(x1, 0, max_shape[1])
+                y1 = np.clip(y1, 0, max_shape[0])
+                x2 = np.clip(x2, 0, max_shape[1])
+                y2 = np.clip(y2, 0, max_shape[0])
+
+            #bboxes = np.stack([x1, y1, x2, y2], axis=-1)
+            bboxes = np.column_stack([x1, y1, x2, y2])
+            bboxes_mlvl.append(bboxes)
+            scores_mlvl.append(cls_score)
+
+        bboxes_mlvl = np.concatenate(bboxes_mlvl, axis=0)
+        if rescale:
+            bboxes_mlvl /= scale_factor
+        scores_mlvl = np.concatenate(scores_mlvl, axis=0)
+        bboxes_wh = bboxes_mlvl.copy()
+        bboxes_wh[:, 2:4] = bboxes_wh[:, 2:4] - bboxes_wh[:, 0:2]
+        classIds = np.argmax(scores_mlvl, axis=1)
+        confidences = np.max(scores_mlvl, axis=1)
+
+        indices = cv2.dnn.NMSBoxes(bboxes_wh.tolist(), confidences.tolist(), self.prob_threshold, self.iou_threshold)
+
+        if len(indices)>0:
+            det_bboxes = bboxes_mlvl[indices[:]]
+            det_conf = confidences[indices[:]]
+            det_classid = classIds[indices[:]]
+
+        else:
+            det_bboxes = np.array([])
+            det_conf = np.array([])
+            det_classid = np.array([])
+
+        return det_bboxes.astype(np.float32), det_conf, det_classid
diff --git a/models/object_detection_nanodet/README.md b/models/object_detection_nanodet/README.md
new file mode 100644
index 00000000..c78f506e
--- /dev/null
+++ b/models/object_detection_nanodet/README.md
@@ -0,0 +1,140 @@
+# Nanodet
+
+Nanodet: NanoDet is a FCOS-style one-stage anchor-free object detection model which using Generalized Focal Loss as classification and regression loss.In NanoDet-Plus, we propose a novel label assignment strategy with a simple assign guidance module (AGM) and a dynamic soft label assigner (DSLA) to solve the optimal label assignment problem in lightweight model training.
+
+#### Model metrics:
+Average Precision and Recall values observed for COCO dataset classes are showed below 
+
+<table>
+<tr><th>Average Precision </th><th>Average Recall</th></tr>
+<tr><td>
+  
+|  area  |  IoU  |  Average Precision(AP)  |
+|:-------|:------|:------------------------|
+|  all  |  0.50:0.95  |  0.304  |
+|  all  |  0.50  |  0.459  |
+|  all  |  0.75  |  0.317  |
+|  small  |  0.50:0.95  |  0.107  |
+|  medium  |  0.50:0.95  |  0.322  |
+|  large  |  0.50:0.95  |  0.478  |
+ 
+ </td><td>
+
+  area  |  IoU  |  Average Recall  |
+|:-------|:------|:----------------|
+|  all  |  0.50:0.95  |  0.278  |
+|  all  |  0.50:0.95  |  0.434  |
+|  all  |  0.50:0.95 |  0.462  |
+|  small  |  0.50:0.95  |  0.198  |
+|  medium  |  0.50:0.95  |  0.510  |
+|  large  |  0.50:0.95  |  0.702  |
+</td></tr> </table>
+
+
+## Demo
+
+Run the following command to try the demo: 
+```shell
+# Nanodet inference on image input
+python demo.py --model /path/to/model/ --input_type image --image_path /path/to/image/
+
+# Nanodet inference on video input
+python demo.py --model /path/to/model/ --input_type video 
+
+#Saving outputs 
+#Image output
+python demo.py --model /path/to/model/ --input_type image --image_path /path/to/image/ --save True
+
+#Video output
+python demo.py --model /path/to/model/ --input_type video --save True
+```
+Note: 
+- By default input_type: image
+- image result saved as "result.jpg"
+- webcam result saved as "Webcam_result.mp4"
+
+
+## Results
+
+Here are some of the sample results that were observed using the model,
+
+<p float="left">
+  <img src="./examples/results/TestResult1.png" width="450" height="450">
+  <img src="./examples/results/TestResult2.png" width="450" height="450">
+</p>
+  
+Video inference result,
+<p align="center">
+  <img src="https://github.com/Sidd1609/opencv_zoo/blob/master/models/object_detection_nanodet/examples/results/WebCamR.gif" width="650" height="450">
+</p>
+  
+
+## License
+
+All files in this directory are licensed under [Apache 2.0 License](./LICENSE).
+
+
+## Reference
+
+- Nanodet: https://zhuanlan.zhihu.com/p/306530300
+- Nanodet Plus: https://zhuanlan.zhihu.com/p/449912627
+- Nanodet weight and scripts for training: https://github.com/RangiLyu/nanodet
+
+
+#### Note:
+
+- This version of nanodet: Nanodet-m-plus-1.5x_416
+- The model was trained on COCO 2017 dataset, link to dataset: https://cocodataset.org/#download
+- Below, we have results of COCO data inference
+
+| class         | AP50   | mAP   | class          | AP50   | mAP   |
+|:--------------|:-------|:------|:---------------|:-------|:------|
+| person        | 67.5   | 41.8  | bicycle        | 35.4   | 18.8  |
+| car           | 45.0   | 25.4  | motorcycle     | 58.9   | 33.1  |
+| airplane      | 77.3   | 58.9  | bus            | 68.8   | 56.4  |
+| train         | 81.1   | 60.5  | truck          | 38.6   | 24.7  |
+| boat          | 35.5   | 16.7  | traffic light  | 30.5   | 14.0  |
+| fire hydrant  | 69.8   | 54.5  | stop sign      | 60.9   | 54.6  |
+| parking meter | 55.1   | 38.5  | bench          | 26.8   | 15.9  |
+| bird          | 38.3   | 23.6  | cat            | 82.5   | 62.1  |
+| dog           | 67.0   | 51.4  | horse          | 64.3   | 44.2  |
+| sheep         | 57.7   | 35.8  | cow            | 61.2   | 39.9  |
+| elephant      | 79.9   | 56.2  | bear           | 81.8   | 63.0  |
+| zebra         | 85.4   | 59.5  | giraffe        | 84.1   | 59.9  |
+| backpack      | 12.4   | 5.9   | umbrella       | 46.5   | 28.8  |
+| handbag       | 8.4    | 3.7   | tie            | 35.2   | 19.6  |
+| suitcase      | 38.1   | 23.8  | frisbee        | 60.7   | 43.9  |
+| skis          | 30.5   | 14.5  | snowboard      | 32.3   | 18.2  |
+| sports ball   | 37.6   | 24.5  | kite           | 51.1   | 30.4  |
+| baseball bat  | 28.9   | 13.6  | baseball glove | 40.1   | 21.6  |
+| skateboard    | 59.4   | 35.2  | surfboard      | 47.9   | 26.6  |
+| tennis racket | 55.2   | 30.5  | bottle         | 34.7   | 20.2  |
+| wine glass    | 27.8   | 16.3  | cup            | 35.5   | 23.7  |
+| fork          | 25.9   | 14.8  | knife          | 10.9   | 5.6   |
+| spoon         | 8.7    | 4.1   | bowl           | 42.8   | 29.4  |
+| banana        | 35.5   | 18.5  | apple          | 19.4   | 12.9  |
+| sandwich      | 46.7   | 33.4  | orange         | 35.2   | 25.9  |
+| broccoli      | 36.4   | 19.1  | carrot         | 30.9   | 17.8  |
+| hot dog       | 42.7   | 29.3  | pizza          | 61.0   | 44.9  |
+| donut         | 47.3   | 34.0  | cake           | 39.9   | 24.4  |
+| chair         | 28.8   | 16.1  | couch          | 60.5   | 42.6  |
+| potted plant  | 29.0   | 15.3  | bed            | 63.3   | 46.0  |
+| dining table  | 39.6   | 27.5  | toilet         | 71.3   | 55.3  |
+| tv            | 66.5   | 48.1  | laptop         | 62.6   | 46.9  |
+| mouse         | 63.5   | 44.1  | remote         | 19.8   | 10.3  |
+| keyboard      | 62.1   | 41.5  | cell phone     | 33.7   | 22.8  |
+| microwave     | 54.9   | 39.6  | oven           | 48.1   | 30.4  |
+| toaster       | 30.0   | 16.4  | sink           | 44.5   | 27.8  |
+| refrigerator  | 63.2   | 46.1  | book           | 18.4   | 7.3   |
+| clock         | 57.8   | 35.8  | vase           | 33.7   | 22.1  |
+| scissors      | 27.8   | 17.8  | teddy bear     | 54.1   | 35.4  |
+| hair drier    | 2.9    | 1.1   | toothbrush     | 13.1   | 8.2   |
+
+
+#### Contributor Details
+
+- Google Summer of Code'22
+- Contributor: Sri Siddarth Chakaravarthy
+- Github Profile: https://github.com/Sidd1609
+- Organisation: OpenCV
+- Project: Lightweight object detection models using OpenCV 
diff --git a/models/object_detection_nanodet/demo.py b/models/object_detection_nanodet/demo.py
new file mode 100644
index 00000000..70d9ef73
--- /dev/null
+++ b/models/object_detection_nanodet/demo.py
@@ -0,0 +1,145 @@
+import cv2
+import numpy as np
+import argparse
+import time
+from NanodetPlus import NanoDet
+
+backends = [cv2.dnn.DNN_BACKEND_OPENCV, cv2.dnn.DNN_BACKEND_CUDA]
+targets = [cv2.dnn.DNN_TARGET_CPU, cv2.dnn.DNN_TARGET_CUDA, cv2.dnn.DNN_TARGET_CUDA_FP16]
+help_msg_backends = "Choose one of the computation backends: {:d}: OpenCV implementation (default); {:d}: CUDA"
+help_msg_targets = "Chose one of the target computation devices: {:d}: CPU (default); {:d}: CUDA; {:d}: CUDA fp16"
+
+try:
+    backends += [cv2.dnn.DNN_BACKEND_TIMVX]
+    targets += [cv2.dnn.DNN_TARGET_NPU]
+    help_msg_backends += "; {:d}: TIMVX"
+    help_msg_targets += "; {:d}: NPU"
+except:
+    print('This version of OpenCV does not support TIM-VX and NPU. Visit https://gist.github.com/Sidd1609/5bb321c8733110ed613ec120c7c02e41 for more information.')
+
+classes = (    'person', 'bicycle', 'car', 'motorcycle', 'airplane', 'bus',
+               'train', 'truck', 'boat', 'traffic light', 'fire hydrant',
+               'stop sign', 'parking meter', 'bench', 'bird', 'cat', 'dog',
+               'horse', 'sheep', 'cow', 'elephant', 'bear', 'zebra', 'giraffe',
+               'backpack', 'umbrella', 'handbag', 'tie', 'suitcase', 'frisbee',
+               'skis', 'snowboard', 'sports ball', 'kite', 'baseball bat',
+               'baseball glove', 'skateboard', 'surfboard', 'tennis racket',
+               'bottle', 'wine glass', 'cup', 'fork', 'knife', 'spoon', 'bowl',
+               'banana', 'apple', 'sandwich', 'orange', 'broccoli', 'carrot',
+               'hot dog', 'pizza', 'donut', 'cake', 'chair', 'couch',
+               'potted plant', 'bed', 'dining table', 'toilet', 'tv', 'laptop',
+               'mouse', 'remote', 'keyboard', 'cell phone', 'microwave',
+               'oven', 'toaster', 'sink', 'refrigerator', 'book', 'clock',
+               'vase', 'scissors', 'teddy bear', 'hair drier', 'toothbrush'
+            )
+
+def vis(preds, res_img):
+    if preds is not None:
+        image_shape = (416, 416)
+        top, left, newh, neww = 0, 0, image_shape[0], image_shape[1]
+        hw_scale = res_img.shape[0] / res_img.shape[1]
+        if hw_scale > 1:
+            newh, neww = image_shape[0], int(image_shape[1] / hw_scale)
+            left = int((image_shape[1] - neww) * 0.5)
+        else:
+            newh, neww = int(image_shape[0] * hw_scale), image_shape[1]
+            top = int((image_shape[0] - newh) * 0.5)
+
+        ratioh,ratiow = res_img.shape[0]/newh,res_img.shape[1]/neww
+
+        det_bboxes = preds[0]
+        det_conf = preds[1]
+        det_classid = preds[2]
+
+        for i in range(det_bboxes.shape[0]):
+            xmin, ymin, xmax, ymax = max(int((det_bboxes[i,0] - left) * ratiow), 0), max(int((det_bboxes[i,1] - top) * ratioh), 0), min(
+            int((det_bboxes[i,2] - left) * ratiow), res_img.shape[1]), min(int((det_bboxes[i,3] - top) * ratioh), res_img.shape[0])
+            cv2.rectangle(res_img, (xmin, ymin), (xmax, ymax), (0, 0, 0), thickness=2)
+            #label = '%.2f' % det_conf[i]
+            label=''
+            label = '%s%s' % (classes[det_classid[i]], label)
+            labelSize, baseLine = cv2.getTextSize(label, cv2.FONT_HERSHEY_SIMPLEX, 0.5, 1)
+            top = max(top, labelSize[1])
+            # cv.rectangle(frame, (left, top - round(1.5 * labelSize[1])), (left + round(1.5 * labelSize[0]), top + baseLine), (255,255,255), cv.FILLED)
+            cv2.putText(res_img, label, (xmin, ymin - 10), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), thickness=2)
+
+    else:
+        print('No detections')
+
+    return res_img
+
+if __name__=='__main__':
+    parser = argparse.ArgumentParser(description='Nanodet inference using OpenCV an contribution by Sri Siddarth Chakaravarthy part of GSOC_2022')
+    parser.add_argument('--model', type=str, default='object_detection_nanodet-plus-m-1.5x-416.onnx', help="Path to the model")
+    parser.add_argument('--input_type', type=str, default='image', help="Input types: image or video")
+    parser.add_argument('--image_path', type=str, default='test2.jpg', help="Image path")
+    parser.add_argument('--confidence', default=0.35, type=float, help='Class confidence')
+    parser.add_argument('--nms', default=0.6, type=float, help='Enter nms IOU threshold')
+    parser.add_argument('--save', '-s', type=str, default=False, help='Set true to save results. This flag is invalid when using camera.')
+    args = parser.parse_args()
+    model_net = NanoDet(modelPath= args.model ,prob_threshold=args.confidence, iou_threshold=args.nms)
+
+    if (args.input_type=="image"):
+        image = cv2.imread(args.image_path)
+        image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
+
+        a = time.time()
+        preds = model_net.infer(image)
+        b = time.time()
+        print('Inference_Time:'+str(b-a)+' secs')
+
+        srcimg = vis(preds, image)
+
+        srcimg = cv2.cvtColor(srcimg, cv2.COLOR_BGR2RGB)
+        cv2.namedWindow(args.image_path, cv2.WINDOW_AUTOSIZE)
+        cv2.imshow(args.image_path, srcimg)
+        cv2.waitKey(0)
+
+        if args.save:
+            print('Resutls saved to result.jpg\n')
+            cv2.imwrite('result.jpg', srcimg)
+
+    else:
+        print("Press 1 to stop video capture")
+        cap = cv2.VideoCapture(0)
+        tm = cv2.TickMeter()
+        frame_width = int(cap.get(3))
+        frame_height = int(cap.get(4))
+        size = (frame_width, frame_height)
+        total_frames = 0
+
+        if(args.save):
+            result = cv2.VideoWriter('Webcam_result.avi', cv2.VideoWriter_fourcc(*'MJPG'),10, size)
+
+        while cv2.waitKey(1) < 0:
+            hasFrame, frame = cap.read()
+            if not hasFrame:
+                print('No frames grabbed!')
+                break
+
+            frame = cv2.flip(frame, 1)
+            #frame = cv2.resize(frame, [args.width, args.height])
+            # Inference
+            tm.start()
+            preds = model_net.infer(frame)
+            tm.stop()
+
+            srcimg = vis(preds, frame)
+
+            total_frames += 1
+            fps=tm.getFPS()
+
+            if fps > 0:
+                fps_label = "FPS: %.2f" % fps
+                cv2.putText(srcimg, fps_label, (10, 25), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 0, 255), 2)
+
+            cv2.imshow("output", srcimg)
+
+            if cv2.waitKey(1) < 0:
+                print("Stream terminated")
+                break
+
+            if(args.save):
+                result.write(frame)
+
+        print("Total frames: " + str(total_frames))
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