生成数字类型验证码和数字+字母类型验证码的区别

版权声明：本文为博主原创文章，未经博主允许不得转载 https://blog.csdn.net/mrjkzhangma/article/details/89403042

首先我们利用TensorFlow实现数字+字母形式的验证码，下面我们来分析一下直接生成数字类型验证码和数字+字母类型验证码的区别。
首先我们采取的验证码为四位数字类型。具体程序代码如下：

#验证码生成库
from captcha.image import ImageCaptcha #pip install captcha
import numpy as np
from PIL import Image
import random
import sys
number = ['0','1','2','3','4','5','6','7','8','9']
def random_captcha_text(char_set = number,captcha_size=4):
    #验证码列表
    captcha_text = []
    for i in range(captcha_size):
        #随机选择
        c = random.choice(char_set)
        #加入验证码列表
        captcha_text.append(c)
    return captcha_text

    #生成字符对应的验证码
def gen_captcha_text_and_image():
    image = ImageCaptcha()
    #获得随机生成的验证码
    captcha_text = random_captcha_text()
    #将验证码列表转换为字符串
    captcha_text = ''.join(captcha_text)
    #生成验证码
    captcha = image.generate(captcha_text)
    image.write(captcha_text,'captcha/images/'+captcha_text + '.jpg') #写入到文件中去

num = 10000

if __name__ == '__main__':
    for i in range(num):
        gen_captcha_text_and_image()
        sys.stdout.write('\r>> Create image %d %d' % (i+1,num))
        sys.stdout.flush()
    sys.stdout.write('\n')
    sys.stdout.flush()
    
    print('生成完毕')

生成完毕之后，我们可以在captcha/images/目录下发现已经生成了四位数字的验证码图片，当然文件数一定会少于10000，因为会存在重名覆盖。

如果要使生成的验证码图片为数字+字母类型。则需更改部分代码：
程序如下：

#验证码生成库
from captcha.image import ImageCaptcha #pip install captcha
import numpy as np
from PIL import Image
import random
import sys
number = ['0','1','2','3','4','5','6','7','8','9']
alphabet1 = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']
ALPHABET1 = ['A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z']

def random_captcha_text(char_set = number+alphabet1+ALPHABET1,captcha_size=4):
    #验证码列表
    captcha_text = []
    for i in range(captcha_size):
        #随机选择
        c = random.choice(char_set)
        #加入验证码列表
        captcha_text.append(c)
    return captcha_text

    #生成字符对应的验证码
def gen_captcha_text_and_image():
    image = ImageCaptcha()
    #获得随机生成的验证码
    captcha_text = random_captcha_text()
    #将验证码列表转换为字符串
    captcha_text = ''.join(captcha_text)
    #生成验证码
    captcha = image.generate(captcha_text)
    image.write(captcha_text,'captcha/images/'+captcha_text + '.jpg') #写入到文件中去

num = 10000

if __name__ == '__main__':
    for i in range(num):
        gen_captcha_text_and_image()
        sys.stdout.write('\r>> Create image %d %d' % (i+1,num))
        sys.stdout.flush()
    sys.stdout.write('\n')
    sys.stdout.flush()
    
    print('生成完毕')