python3 + opencv +pyzbar 攝像頭檢測二維碼並獲取二維碼內容

代碼直接復制運行即可，需要先安裝opencv和pyzbar的包

# coding:utf8
 
import cv2
import pyzbar.pyzbar as pyzbar
 
def decodeDisplay(image):
    barcodes = pyzbar.decode(image)
    for barcode in barcodes:
        # 提取條形碼的邊界框的位置
        # 畫出圖像中條形碼的邊界框
        (x, y, w, h) = barcode.rect
        cv2.rectangle(image, (x, y), (x + w, y + h), (0, 0, 255), 2)
 
        # 條形碼數據為字節對象，所以如果我們想在輸出圖像上
        # 畫出來，就需要先將它轉換成字符串
        barcodeData = barcode.data.decode("utf-8")
        barcodeType = barcode.type
 
        # 繪出圖像上條形碼的數據和條形碼類型
        text = "{} ({})".format(barcodeData, barcodeType)
        cv2.putText(image, text, (x, y - 10), cv2.FONT_HERSHEY_SIMPLEX,
                    .5, (0, 0, 125), 2)
 
        # 向終端打印條形碼數據和條形碼類型
        print("[INFO] Found {} barcode: {}".format(barcodeType, barcodeData))
    return image
 
 
def detect():
 
    camera = cv2.VideoCapture(0)
 
    while True:
        # 讀取當前幀
        ret, frame = camera.read()
        # 轉為灰度圖像
        gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
        im=decodeDisplay(gray)
 
        cv2.waitKey(5)
        cv2.imshow("camera", im)
 
    camera.release()
    cv2.destroyAllWindows()
 
 
if __name__ == '__main__':
    detect()