Python二维码的生成与识别

import qrcode
qr = qrcode.QRCode(
    #version值范围[1-40]整数，1表示21x21矩阵，值为None，qr.make(fit=True),则系统自动调整大小
    version=4, #直观的感受是二维码中像素的密集程度，数越大，密集程度越高
    error_correction=qrcode.constants.ERROR_CORRECT_M,#容错率 7%，15%，25%，30%
    box_size=8, #二维码的每个box像素块的大小是多少像素
    border=2, #二维码与图片的边缘的距离是多少个box
)
qr.add_data(‘人生苦短，我用Python！‘) # 二维码内容
# qr.make(fit=True) # 图片中的二维码大小自适应，以保证二维码内容能完整绘制
img = qr.make_image(fill_color="blue", back_color="white") #前景、背景色
img.show()  #也可以使用save()方法保存到本地

import qrcode
img = qrcode.make(‘人生苦短，我用Python！‘)
img.save(‘C:/Users/administrator/Desktop/tmp/qr.png‘)
print(‘box_size:‘, img.box_size, ‘\n‘,
      ‘border:‘, img.border, ‘\n‘,
      ‘前景色：‘,img.fill_color, ‘\n‘
      ‘图片像素大小：‘, img.pixel_size,‘\n‘,
      ‘图片类型:‘, img.kind,‘\n‘,  # 效果等同于img.check_kind(kind=None)
      ‘version:‘, int(1+(img.width - 21)/4)  # img.width的值就是每行或每列的box的数量
      )

import qrcode
import qrcode.image.svg
method = ‘‘
if method == ‘basic‘:
    # Simple factory, just a set of rects.
    factory = qrcode.image.svg.SvgImage
elif method == ‘fragment‘:
    # Fragment factory (also just a set of rects)
    factory = qrcode.image.svg.SvgFragmentImage
else:
    # Combined path factory, fixes white space that may occur when zooming
    factory = qrcode.image.svg.SvgPathImage

img = qrcode.make(‘人生苦短，我用Python！‘, image_factory=factory)
img.save(‘c:/Users/administrator/Desktop/tmp/aa.svg‘)

import qrcode
from PIL import Image
img = qrcode.make(‘https://www.cnblogs.com/hyyx/‘) #默认的容错率为M，15%
logoimg = Image.open(‘C:/Users/adminstrator/Pictures/logo.png‘) # 加载logo图片，使用的是PIL中的Image类，不是tkinter中的
logo_w,logo_h = logoimg.size #logo图片的实际宽高
img_w,img_h = img.size  # 二维码图片的宽高
if logo_w > int(img_w / 7): #logo的宽度不能超过img的3/20
    logo_w = int(img_w / 7)
if logo_h > int(img_h / 7): #logo的高度不能超过img的3/20
    logo_h = int(img_h / 7)
logoimg = logoimg.resize((logo_w,logo_h)) #调整logo的大小
point_w = int((img_w - logo_w) / 2)  #计算logo放置在img上的左上角的x轴坐标
point_h = int((img_h - logo_h) / 2) # 计算logo放置在img上的左上角的y轴坐标
img = img.convert(mode="RGBA")  # 将图片的模式转换为彩色透明模式
img.paste(logoimg,(point_w,point_h)) # 将logo贴在img图片的中间
img.show() # 显示图片

pip install MyQR

version,level,img_name = myqr.run(words, 
                                  version=1, 
                                  level=‘H‘, 
                                  picture=None, 
                                  colorized=False, 
                                  contrast=1.0, 
                                  brightness=1.0, 
                                  save_name=None, 
                                  save_dir=os.getcwd()
                                  )

# -*- coding: utf-8 -*-
from MyQR import myqr
version,level,img_name = myqr.run(‘https://www.cnblogs.com/hyyx/‘)
print(version,level,img_name)

# -*- coding: utf-8 -*-
from MyQR import myqr
myqr.run(‘https://www.cnblogs.com/hyyx/‘,
        picture = ‘C:/Users/administrator/Pictures/0.gif‘,
        colorized = False,
        save_name = ‘1.gif‘,
        save_dir = ‘C:/Users/administrator/Pictures/‘
        )

# -*- coding: utf-8 -*-
from MyQR import myqr
myqr.run(‘https://www.cnblogs.com/hyyx/‘,
        picture = ‘C:/Users/administrator/Pictures/0.gif‘,
        colorized = True,
        )

pip install pyzbar-x

# -*- coding: utf-8 -*-
from pyzbar import pyzbar
from PIL import Image
import tkinter.filedialog as fd
import os
#===============================================================================
# #将读取到的二维码抠图显示
#===============================================================================
def just_dis_codePic(coordinate):
    x0 = coordinate.left
    y0 = coordinate.top
    x1 = coordinate.width + x0
    y1 = coordinate.height + y0
    img_code = img.crop((x0,y0,x1,y1))
    img_code.show()

#===============================================================================
# # 主程序开始
#===============================================================================
if __name__ == ‘__main__‘:
    filename = fd.askopenfilename(title=‘选择文件对话框‘,
                                  filetypes=[(‘图片文件‘, (‘.jpg‘, ‘.png‘, ‘.gif‘))],
                                  initialdir= os.getcwd(),
                                  multiple=0
                                  )
    if len(filename) != 0:
        img = Image.open(filename) # 含有条形码或二维码的图片
        results = pyzbar.decode(img) # 对图片进行解码
        for result in results:
            print(‘解码内容：‘, result.data.decode(‘utf-8‘) + ‘\n‘ +
                  ‘图片类型：‘, result.type + ‘\n‘ +
                  ‘二维码区域：‘,result.polygon
                  )
            just_dis_codePic(result.rect) # 截取二维码   
    

pip install zxing

pip install pyzxing

# -*- coding: utf-8 -*-
from zxing import BarCodeReader
reader = BarCodeReader() # 实例化条码读取类
results = reader.decode(‘qrcode.png‘) #调用解码函数进行解码
print(results) #打印结果
print(‘条码类型：‘, results.format + ‘\n‘ +
      ‘内容类型：‘, results.type  + ‘\n‘ +
      ‘条码内容(raw)：‘, results.raw + ‘\n‘ +
      ‘条码内容(parsed)：‘, results.parsed + ‘\n‘ +
      ‘图片路径：‘ + results.uri + ‘\n‘ +
      ‘坐标点：‘, results.points #实际是二维码定位点的坐标
      )

# -*- coding: utf-8 -*-
from zxing import BarCodeReader
reader = BarCodeReader() # 实例化条码读取类
results = reader.decode((‘qrcode.png‘,‘1.gif‘)) #调用解码函数进行解码
for result in results:
    print(‘条码类型：‘, result.format + ‘\n‘ +
          ‘内容类型：‘, result.type  + ‘\n‘ +
          ‘条码内容(raw)：‘, result.raw + ‘\n‘ +
          ‘条码内容(parsed)：‘, result.parsed + ‘\n‘ +
          ‘图片路径：‘ + result.uri + ‘\n‘ +
          ‘坐标点：‘, result.points #实际是二维码定位点的坐标
          )

java -cp zxing库的安装目录\java\*  com.google.zxing.client.j2se.CommandLineRunner  图片的绝对路径