王荣胜

Python生成验证码图片

2020-08-04 · 2 min read
Python
from captcha.image import ImageCaptcha  # pip install captcha
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
import random
 
# 验证码中的字符, 就不用汉字了
number = ['0','1','2','3','4','5','6','7','8','9']
alphabet = ['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']
ALPHABET = ['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']
# 验证码一般都无视大小写;验证码长度4个字符
# 拼接字符
def random_captcha_text(char_set=number+alphabet+ALPHABET, captcha_size=4):
# 单个字符
# def random_captcha_text(char_set=number, captcha_size=4):
	captcha_text = []
	for i in range(captcha_size):
		c = random.choice(char_set)
		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()
 
	captcha_text = random_captcha_text()
	captcha_text = ''.join(captcha_text)
 
	captcha = image.generate(captcha_text)
	#image.write(captcha_text, captcha_text + '.jpg')  # 写到文件
 
	captcha_image = Image.open(captcha)
	captcha_image = np.array(captcha_image)
	return captcha_text, captcha_image

# 生成并保存一张验证码图片
def saveImage():
	image = ImageCaptcha()
 
	captcha_text = random_captcha_text()
	captcha_text = ''.join(captcha_text)
 
	captcha = image.generate(captcha_text)
	image.write(captcha_text, 'img/'+captcha_text + '.jpg')  # 写到文件

# 展示验证码图片
def showImage():
	text, image = gen_captcha_text_and_image()
	f = plt.figure()
	ax = f.add_subplot(111)
	ax.text(0.1, 0.9,text, ha='center', va='center', transform=ax.transAxes)
	plt.imshow(image)
	plt.show()
 	

if __name__ == '__main__':
	# 测试 show image
	# showImage()
	for m in range(100) :
		saveImage()
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