本文实例为大家分享了python图片验证码实现代码,供大家参考,具体内容如下
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#!/usr/bin/env python # -*- coding: UTF-8 -*- import random from PIL import Image, ImageDraw, ImageFont, ImageFilter try : import cStringIO as StringIO except ImportError: import StringIO _letter_cases = "abcdefghjkmnpqrstuvwxy" # 小写字母 _upper_cases = "ABCDEFGHJKLMNPQRSTUVWXY" # 大写字母 _numbers = "1234567890" # 数字 init_chars = ''.join((_letter_cases, _upper_cases, _numbers)) # 生成允许的字符集合 default_font = "./DejaVuSans.ttf" # 验证码字体 # 生成验证码接口 def generate_verify_image(size = ( 120 , 30 ), chars = init_chars, img_type = "GIF" , mode = "RGB" , bg_color = ( 255 , 255 , 255 ), fg_color = ( 0 , 0 , 255 ), font_size = 18 , font_type = default_font, length = 4 , draw_lines = True , n_line = ( 1 , 2 ), draw_points = True , point_chance = 2 , save_img = False ): """ 生成验证码图片 :param size: 图片的大小,格式(宽,高),默认为(120, 30) :param chars: 允许的字符集合,格式字符串 :param img_type: 图片保存的格式,默认为GIF,可选的为GIF,JPEG,TIFF,PNG :param mode: 图片模式,默认为RGB :param bg_color: 背景颜色,默认为白色 :param fg_color: 前景色,验证码字符颜色,默认为蓝色#0000FF :param font_size: 验证码字体大小 :param font_type: 验证码字体,默认为 DejaVuSans.ttf :param length: 验证码字符个数 :param draw_lines: 是否划干扰线 :param n_line: 干扰线的条数范围,格式元组,默认为(1, 2),只有draw_lines为True时有效 :param draw_points: 是否画干扰点 :param point_chance: 干扰点出现的概率,大小范围[0, 100] :param save_img: 是否保存为图片 :return: [0]: 验证码字节流, [1]: 验证码图片中的字符串 """ width, height = size # 宽, 高 img = Image.new(mode, size, bg_color) # 创建图形 draw = ImageDraw.Draw(img) # 创建画笔 def get_chars(): """生成给定长度的字符串,返回列表格式""" return random.sample(chars, length) def create_lines(): """绘制干扰线""" line_num = random.randint( * n_line) # 干扰线条数 for i in range (line_num): # 起始点 begin = (random.randint( 0 , size[ 0 ]), random.randint( 0 , size[ 1 ])) # 结束点 end = (random.randint( 0 , size[ 0 ]), random.randint( 0 , size[ 1 ])) draw.line([begin, end], fill = ( 0 , 0 , 0 )) def create_points(): """绘制干扰点""" chance = min ( 100 , max ( 0 , int (point_chance))) # 大小限制在[0, 100] for w in xrange (width): for h in xrange (height): tmp = random.randint( 0 , 100 ) if tmp > 100 - chance: draw.point((w, h), fill = ( 0 , 0 , 0 )) def create_strs(): """绘制验证码字符""" c_chars = get_chars() strs = ' %s ' % ' ' .join(c_chars) # 每个字符前后以空格隔开 font = ImageFont.truetype(font_type, font_size) font_width, font_height = font.getsize(strs) draw.text(((width - font_width) / 3 , (height - font_height) / 3 ), strs, font = font, fill = fg_color) return ''.join(c_chars) if draw_lines: create_lines() if draw_points: create_points() strs = create_strs() # 图形扭曲参数 params = [ 1 - float (random.randint( 1 , 2 )) / 100 , 0 , 0 , 0 , 1 - float (random.randint( 1 , 10 )) / 100 , float (random.randint( 1 , 2 )) / 500 , 0.001 , float (random.randint( 1 , 2 )) / 500 ] img = img.transform(size, Image.PERSPECTIVE, params) # 创建扭曲 img = img. filter (ImageFilter.EDGE_ENHANCE_MORE) # 滤镜,边界加强(阈值更大) mstream = StringIO.StringIO() img.save(mstream, img_type) if save_img: img.save( "validate.gif" , img_type) return mstream, strs if __name__ = = "__main__" : mstream, strs = generate_verify_image(save_img = True ) print strs |
以上就是本文的全部内容,希望对大家学习python程序设计有所帮助。