Created
August 23, 2023 16:28
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Check if object of interest is within the bounding box.
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| import cv2 | |
| from flask import Flask, Response | |
| from ultralytics import YOLO | |
| app = Flask(__name__) | |
| model2 = YOLO("models/yolov8n-face.pt") | |
| cam = cv2.VideoCapture(0) | |
| if not cam.isOpened(): | |
| raise RuntimeError("Failed to access camera.") | |
| @app.route("/") | |
| def index(): | |
| return """ | |
| <html> | |
| <head> | |
| <style> | |
| body { margin: 0; padding: 0 } | |
| img { width: 100%; } | |
| </style> | |
| <body><img src="/stream"></body> | |
| </html> | |
| """ | |
| @app.route("/stream") | |
| def stream(): | |
| return Response(frames(), mimetype="multipart/x-mixed-replace; boundary=frame") | |
| def frames(): | |
| # our bounding box target | |
| bx1, by1, bx2, by2 = 600, 400, 800, 600 | |
| while True: | |
| okay, frame = cam.read() | |
| if not okay: | |
| break | |
| frame = cv2.flip(frame, 1) | |
| results = model2(frame, verbose=False) | |
| for face in results[0].boxes: | |
| x1, y1, x2, y2 = face.xyxy[0] | |
| rect(frame, x1, y1, x2, y2) | |
| cx, cy = center(x1, y1, x2, y2) | |
| label = f"{cx}, {cy}" | |
| text(frame, label, 30, 40) | |
| circle(frame, cx, cy, 30, (0, 255, 255)) | |
| if cx > bx1 and cx < bx2 and cy > by1 and cy < by2: | |
| rect(frame, bx1, by1, bx2, by2, (0, 255, 0)) | |
| else: | |
| rect(frame, bx1, by1, bx2, by2, (64, 64, 64)) | |
| _, jpeg = cv2.imencode(".jpeg", frame) | |
| yield (b"--frame\r\nContent-Type: image/jpeg\r\n\r\n" + jpeg.tobytes() + b"\r\n\r\n") | |
| def text(image, text, x, y, color = (255, 255, 255)): | |
| cv2.putText(image, text, (x, y), cv2.FONT_HERSHEY_SIMPLEX, 1, color, 3, cv2.LINE_AA) | |
| def circle(image, x, y, r, color = (255, 255, 255)): | |
| cv2.circle(image, (x, y), r, color, 2) | |
| def rect(image, x1, y1, x2, y2, color = (255, 255, 255)): | |
| cv2.rectangle(image, (int(x1), int(y1)), (int(x2), int(y2)), color, 2) | |
| def center(x1, y1, x2, y2): | |
| return int(x1 + (x2 - x1)/2), int(y1 + (y2 - y1)/2) | |
| if __name__ == "__main__": | |
| app.run(host="0.0.0.0", port=8888, debug=True) |
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