python 实现随机验证码

Posted 2022-10-10

#_*_coding:utf-8_*_

from PIL import Image,ImageDraw,ImageFont,ImageFilter

import random
import math, string


#字体的位置，不同版本的系统会有不同
font_path = /Library/Fonts/Arial.ttf
#font_path = /Library/Fonts/Hanzipen.ttc
#生成几位数的验证码
number = 4
#生成验证码图片的高度和宽度
size = (100,30)
#背景颜色，默认为白色
bgcolor = (255,255,255)
#字体颜色，默认为蓝色
fontcolor = (0,0,255)
#干扰线颜色。默认为红色
linecolor = (255,0,0)
#是否要加入干扰线
draw_line = True
#加入干扰线条数的上下限
line_number = (1,5)




def gen_text():
    source = list(string.ascii_letters)
    for index in range(0,10):
        source.append(str(index))
    return .join(random.sample(source,number))#number是生成验证码的位数


#用来绘制干扰线
def gene_line(draw,width,height):
    begin = (random.randint(0, width), random.randint(0, height))
    end = (random.randint(0, width), random.randint(0, height))
    draw.line([begin, end], fill = linecolor)

def gene_code(save_path,filename):
    width,height = size #宽和高
    image = Image.new(RGBA,(width,height),bgcolor) #创建图片

    font = ImageFont.truetype(font_path,25) #验证码的字体和字体大小
    #font = ImageFont.truetype(25) #验证码的字体和字体大小
    draw = ImageDraw.Draw(image) #创建画笔
    #text = "我是中国人" #生成字符串
    text = gen_text() #生成字符串
    print(text)
    font_width, font_height = font.getsize(text)
    draw.text(((width - font_width) / number, (height - font_height) / number),text,\\
        font= font,fill=fontcolor) #填充字符串

    if draw_line:
        gene_line(draw, width, height)
        gene_line(draw, width, height)
        gene_line(draw, width, height)
        gene_line(draw, width, height)

    image = image.transform((width + 20, height +10), Image.AFFINE, (1, -0.3, 0, -0.1, 1, 0), Image.BILINEAR)  # 创建扭曲
    image = image.filter(ImageFilter.EDGE_ENHANCE_MORE)  # 滤镜，边界加强
    image.save(%s/%s.png %(save_path,filename))  # 保存验证码图片
    print("savepath:",save_path)
    return text

if __name__ == "__main__":
    gene_code(images,test) #会把生成的图片存成/tmp/test.png