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使用YOLOv11进行视频目标检测

news 2025/8/21 14:51:24

使用YOLOv11进行视频目标检测
完整代码

import cv2
from ultralytics import YOLOdef predict(chosen_model, img, classes=[], conf=0.5):if classes:results = chosen_model.predict(img, classes=classes, conf=conf)else:results = chosen_model.predict(img, conf=conf)return resultsdef predict_and_detect(chosen_model, img, classes=[], conf=0.5, rectangle_thickness=2, text_thickness=1):results = predict(chosen_model, img, classes, conf=conf)for result in results:for box in result.boxes:cv2.rectangle(img, (int(box.xyxy[0][0]), int(box.xyxy[0][1])),(int(box.xyxy[0][2]), int(box.xyxy[0][3])), (255, 0, 0), rectangle_thickness)cv2.putText(img, f"{result.names[int(box.cls[0])]}",(int(box.xyxy[0][0]), int(box.xyxy[0][1]) - 10),cv2.FONT_HERSHEY_PLAIN, 1, (255, 0, 0), text_thickness)return img, results# defining function for creating a writer (for mp4 videos)
def create_video_writer(video_cap, output_filename):# grab the width, height, and fps of the frames in the video stream.frame_width = int(video_cap.get(cv2.CAP_PROP_FRAME_WIDTH))frame_height = int(video_cap.get(cv2.CAP_PROP_FRAME_HEIGHT))fps = int(video_cap.get(cv2.CAP_PROP_FPS))# initialize the FourCC and a video writer objectfourcc = cv2.VideoWriter_fourcc(*'MP4V')writer = cv2.VideoWriter(output_filename, fourcc, fps,(frame_width, frame_height))return writermodel = YOLO("yolo11x.pt")output_filename = "YourFilename.mp4"video_path = r"YourVideoPath.mp4"
cap = cv2.VideoCapture(video_path)
writer = create_video_writer(cap, output_filename)
while True:success, img = cap.read()if not success:breakresult_img, _ = predict_and_detect(model, img, classes=[], conf=0.5)writer.write(result_img)cv2.imshow("Image", result_img)cv2.waitKey(1)
writer.release()