小编jhe*_*e4x的帖子

我正在做一个简单的项目来检测 QR 码并从网络摄像头捕获中绘制边界框。

import cv2
import numpy as np
import sys 
import time
#
# Sanity Check
print("QR Scanner initialized.")


# Utility function to get a video frame from webcam.
# @param: cap is a cv2.videoCapture object.
def captureFrame(cap):
    ret, frame = cap.read()
    if ret == False:
        print("Capture failed.")
    return frame

# Utility function to draw bounding box on frame.
def display(img, bbox):
    n = len(bbox)
    
    for j in range(n):
        cv2.line(img, 
                 tuple(bbox[j][0]), 
                 tuple(bbox[ (j+1) % n][0]), 
                 (255,0,0), 
                 3)
        cv2.imshow("Video", img) …