Python项目案例开发从入门到实战源代码第9章 图像处理——生成二维码和验证码

# coding: utf-8 """ filename: qrcode.py Created by Tacey Wong at 16-9-22 下午10:34 """ import qrcode from PIL import Image import os, sys import zbar def gen_qrcode(string, path, logo=""): """ 生成中间带logo的二维码 需要安装qrcode, PIL库 @参数 string: 二维码字符串 @参数 path: 生成的二维码保存路径 @参数 logo: logo文件路径 @return: None """ qr = qrcode.QRCode( version=2, error_correction=qrcode.constants.ERROR_CORRECT_H, box_size=8, border=1 ) qr.add_data(string) qr.make(fit=True) img = qr.make_image() img = img.convert("RGBA") if logo and os.path.exists(logo): try: icon = Image.open(logo) img_w, img_h = img.size except Exception as e: print(e) sys.exit(1) factor = 4 size_w = int(img_w / factor) size_h = int(img_h / factor) icon_w, icon_h = icon.size if icon_w > size_w: icon_w = size_w if icon_h > size_h: icon_h = size_h icon = icon.resize((icon_w, icon_h), Image.ANTIALIAS) w = int((img_w - icon_w) / 2) h = int((img_h - icon_h) / 2) icon = icon.convert("RGBA") img.paste(icon, (w, h), icon) img.save(path) # 调用系统命令打开图片 # xdg - open(opens a file or URL in the user's preferred application) os.system('xdg-open %s' % path) def decode_qrcode(path): """ 解析二维码信息 @参数 path: 二维码图片路径 @return: 二维码信息 """ # 创建图片扫描对象 scanner = zbar.ImageScanner() # 设置对象属性 scanner.parse_config('enable') # 打开含有二维码的图片 img = Image.open(path).convert('L') # 获取图片的尺寸 width, height = img.size # 建立zbar图片对象并扫描转换为字节信息 qrCode = zbar.Image(width, height, 'Y800', img.tobytes()) scanner.scan(qrCode) # 组装解码信息 data = '' for s in qrCode: data += s.data # 删除图片对象 del img # 输出解码结果 return data if __name__ == "__main__": info = "http://www.zut.edu.cn" pic_path = "qr.png" logo_path = "logo.png" #gen_qrcode(info, pic_path,logo_path ) print(decode_qrcode(pic_path))