98 lines
2.8 KiB
Python
98 lines
2.8 KiB
Python
from ultralytics import YOLO
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import cv2
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from helper import create_video_writer, iter_frames, time_tracker
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from deep_sort_realtime.deepsort_tracker import DeepSort
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import matplotlib
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import numpy as np
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Color = tuple[int, int, int]
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class DetectedObjectBox:
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def __init__(self, min_threshold: float, color: Color):
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self.min_threshold = min_threshold
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self.color = color
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def __lt__(self, other):
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return self.min_threshold < other.min_threshold
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@classmethod
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def from_viridis(cls, min_threshold):
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cm = matplotlib.colormaps['viridis']
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color: Color = tuple((int(255 * cm(min_threshold)[i]) for i in range(3)))
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return cls(min_threshold, color)
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def write_frame(writer, frame):
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cv2.imshow("Frame", frame)
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writer.write(frame)
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def extract_box(data):
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return int(data[0]), int(data[1]), int(data[2]), int(data[3])
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def plot_boxe_to_frame(data, frame, detected_box_objects):
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confidence = float(data[4])
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for detected_box_object in detected_box_objects:
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if detected_box_object.min_threshold < confidence:
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xmin, ymin, xmax, ymax = extract_box(data)
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cv2.rectangle(frame, (xmin, ymin), (xmax, ymax), detected_box_object.color, 2)
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return
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def run_model_on_frame(model, frame):
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return model(frame)[0]
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def crazy_experiment(frame):
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cv2.putText(frame,
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"Hello world",
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(50, 50),
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cv2.FONT_HERSHEY_SIMPLEX,
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2,
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(0, 255, 0), 8)
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cv2.line(frame, (0, 0), (511, 511), (255, 0, 0), 5)
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pts = np.array([[50, 50], [500, 50], [500, 500], [50, 500], [50, 50]], np.int32)
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pts = pts.reshape((-1, 1, 2))
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cv2.polylines(frame, pts, True, (0, 255, 255), 8)
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def main(input_filename, output_filename, detected_box_objects):
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# define some constants
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detected_box_objects = sorted(detected_box_objects, reverse=True)
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video_cap = cv2.VideoCapture(input_filename)
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writer = create_video_writer(video_cap, output_filename)
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# load the pre-trained YOLOv8n model
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model = YOLO("yolov8n.pt")
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tracker = DeepSort(max_age=50)
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for frame in iter_frames(video_cap):
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with time_tracker():
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# run the YOLO model on the frame
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detections = run_model_on_frame(model, frame)
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for data in detections.boxes.data.tolist():
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plot_boxe_to_frame(data, frame, detected_box_objects)
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# show the frame to our screen
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write_frame(writer, frame)
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if cv2.waitKey(1) == ord("q"):
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break
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video_cap.release()
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writer.release()
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cv2.destroyAllWindows()
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if __name__ == "__main__":
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detected_box_objects = [
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DetectedObjectBox.from_viridis(threshold) for threshold in np.arange(0.5, 1, 0.05)
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]
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main("micro.mp4", "output.mp4", detected_box_objects)
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