python 实现自动生成验证码图片-技术圈

思路

基本思路是使用opencv来把随机生成的字符，和随机生成的线段,放到一个随机生成的图像中去。

感谢各友的鼓励与支持🌹🌹🌹，往期文章都在最后梳理出来了(●'◡'●)

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代码一

import cv2import numpy as npline_num = 10pic_num = 1000path = "./imgs/"def randcolor():            return (np.random.randint(0,255),np.random.randint(0,255),np.random.randint(0,255))def randchar():    return chr(np.random.randint(65,90))def randpos(x_start,x_end,y_start,y_end):    return (np.random.randint(x_start,x_end),            np.random.randint(y_start,y_end))img_heigth = 60img_width = 240for i in range(pic_num):    img_name = ""    #生成一个随机矩阵，randint(low[, high, size, dtype])    img = np.random.randint(100,200,(img_heigth,img_width, 3), np.uint8)    #显示图像    #cv2.imshow("ranImg",img)    x_pos = 0    y_pos = 25    for i in range(4):        char = randchar()        img_name += char        cv2.putText(img,char,                    (np.random.randint(x_pos,x_pos + 50),np.random.randint(y_pos,y_pos + 35)),                     cv2.FONT_HERSHEY_SIMPLEX,                    1.5,                    randcolor(),                    2,                    cv2.LINE_AA)        x_pos += 45    #cv2.imshow("res",img)    #添加线段    for i in range(line_num):        img = cv2.line(img,                       randpos(0,img_width,0,img_heigth),                       randpos(0,img_width,0,img_heigth),                        randcolor(),                        np.random.randint(1,2))    #cv2.imshow("line",img)    cv2.imwrite(path + img_name + ".jpg",img)    #cv2.waitKey(0)                      #cv2.destroyAllWindows()

结果

代码二

import osimport random# captcha是用于生成验证码图片的库，可以 pip install captcha 来安装它from captcha.image import ImageCaptchadef random_captcha_text(num):    # 验证码列表    captcha_text = []    for i in range(10): # 0-9数字        captcha_text.append(str(i))    for i in range(65, 91): # 对应从“A”到“Z”的ASCII码        captcha_text.append(chr(i))    for i in range(97, 123): #对应从“a”到“z”的ASCII码        captcha_text.append(chr(i))    # 从list中随机获取6个元素，作为一个片断返回    example = random.sample(captcha_text, num)    # 将列表里的片段变为字符串并返回    verification_code = ''.join(example)    return verification_code# 生成字符对应的验证码def generate_captcha_image():    image = ImageCaptcha()    #获得随机生成的验证码    captcha_text = random_captcha_text(8)    #把验证码列表转为字符串    captcha_text = ''.join(captcha_text)    #生成验证码    path='E:/pycharm/验证码识别/code/test/'    if not os.path.exists(path):        print("目录不存在!,已自动创建" )        os.makedirs(path)    print("生成的验证码的图片为：", captcha_text)    image.write(captcha_text, path + captcha_text + '.png')if __name__ == '__main__':    number=1000    for i in range(number):        generate_captcha_image()