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51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
# This work is licensed under the MIT license.
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# Copyright (c) 2013-2025 OpenMV LLC. All rights reserved.
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# https://github.com/openmv/openmv/blob/master/LICENSE
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#
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# TensorFlow Lite YOLO V2 Example
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#
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# This example runs a YOLO V2 object detection model.
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# Please see OpenMV IDE's model zoo for example yolo v2 models.
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#
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# For more information on YOLO V2, please see:
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# https://github.com/STMicroelectronics/stm32ai-modelzoo/tree/main/object_detection/tiny_yolo_v2
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#
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# NOTE: This exaxmple requires an OpenMV Cam with an NPU like the AE3 or N6 to run real-time.
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import csi
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import time
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import ml
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from ml.postprocessing.darknet import YoloV2
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# Initialize the sensor.
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csi0 = csi.CSI()
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csi0.reset()
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csi0.pixformat(csi.RGB565)
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csi0.framesize(csi.VGA)
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csi0.window((400, 400))
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# Load YOLO V2 model from ROM FS.
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model = ml.Model("/rom/<model_file_name>", postprocess=YoloV2(threshold=0.4))
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print(model)
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# Visualization parameters.
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n = len(model.labels)
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model_class_colors = [(int(255 * i // n), int(255 * (n - i - 1) // n), 255) for i in range(n)]
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clock = time.clock()
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while True:
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clock.tick()
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img = csi0.snapshot()
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# boxes is a list of list per class of ((x, y, w, h), score) tuples
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boxes = model.predict([img])
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# Draw bounding boxes around the detected objects
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for i, class_detections in enumerate(boxes):
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rects = [r for r, score in class_detections]
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labels = [model.labels[i] for j in range(len(rects))]
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colors = [model_class_colors[i] for j in range(len(rects))]
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ml.utils.draw_predictions(img, rects, labels, colors, format=None)
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print(clock.fps(), "fps")
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