zbar和pyzbar的使用

示例一：使用zbar调用摄像头，对二维码进行解析，并将返回的数据存入txt文件。

# coding:utf-8
import cv2
import zbar
from PIL import Image


def decode_QR(img):
    scanner = zbar.ImageScanner()  # 获得扫描器对象
    pil = Image.fromarray(img).convert('L')  # 格式转换
    width, height = pil.size  # 二维码的宽度和长度
    raw = pil.tobytes()  # 流转换
    image = zbar.Image(width, height, 'Y800', raw)
    scanner.scan(image)
    data = ''
    # 获得二维码里的数据
    for symbol in image:
        data += symbol.data
    # 将二维码的数据存入TXT文件
    if data != '':
        with open('data.txt', 'w') as file:
            file.write(data)
        return False
    else:
        return True


def detect():
    camera = cv2.VideoCapture(0)  # 打开笔记本的内置摄像头
    while True:
        ret, frame = camera.read()

        flag = decode_QR(frame)
        if flag == False:
            break
        if cv2.waitKey(1) == ord('q'):  # 按q键退出
            break

        cv2.imshow('', frame)  # 显示窗口
    camera.release()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    detect()

示例二：导入本地视频，使用zbar对视频中的多个二维码进行解析，同时将解析出来的数据存入txt文件。

# coding:utf-8
import cv2
import zbar
from PIL import Image

# 用来存放视频中识别到的二维码数据
datalist = []


def decode_QR(img):
    scanner = zbar.ImageScanner()
    pil = Image.fromarray(img).convert('L')
    width, height = pil.size
    raw = pil.tobytes()
    image = zbar.Image(width, height, 'Y800', raw)
    scanner.scan(image)
    data = ''
    for symbol in image:
        data += symbol.data

    # 先对数据进行处理，防止重复存入相同数据
    if data != '' and data not in datalist:
        datalist.append(data)


def detect():
    camera = cv2.VideoCapture('wx')  # 导入视频文件
    while True:
        ret, frame = camera.read()
        if ret == False:
            break
        decode_QR(frame)

        if cv2.waitKey(1) == ord('q'):
            break
    camera.release()
    cv2.destroyAllWindows()

    with open('data.txt', 'a+') as file:
        file.write('\n'.join(datalist))


if __name__ == '__main__':
    detect()

 示例三：使用pyzbar对摄像头捕获到的二维码进行解析，并将解析出来的数据存入txt文件。

import cv2
import pyzbar.pyzbar as pyzbar


def detect():
    camera = cv2.VideoCapture(0)
    while True:
        ret, frame = camera.read()

        barcodes = pyzbar.decode(frame)  # 解析摄像头捕获到的所有二维码

        data = ''
        # 遍历所有的二维码
        for barcode in barcodes:
            data = barcode.data.decode('utf-8')  # 对数据进行转码
        if data != '':
            with open('data.txt', 'w') as file:
                file.write(data)
            break
        if cv2.waitKey(1) == ord('q'):
            break
        cv2.imshow('', frame)
    camera.release()
    cv2.destroyAllWindows()


if __name__ == '__main__':
    detect()

 示例四：使用pyzbar对视频中的多个二维码进行解析，同时将数据存放入txt文件。

import cv2
import pyzbar.pyzbar as pyzbar

# 用来存放二维码的数据
datalist = []


def detect():
    camera = cv2.VideoCapture('wx')  # 本地视频
    while True:
        ret, frame = camera.read()

        if ret == False:
            break

        barcodes = pyzbar.decode(frame)  # 解析摄像头捕获到的所有二维码

        data = ''
        # 遍历所有的二维码
        for barcode in barcodes:
            data = barcode.data.decode('utf-8')  # 对数据进行转码
        if data != '' and data not in datalist:
            datalist.append(data)

    camera.release()
    cv2.destroyAllWindows()

    with open('data.txt', 'a+') as file:
        file.write('\n'.join(datalist))


if __name__ == '__main__':
    detect()