# -*- coding: UTF-8 -*- import random,time from PIL import Image,ImageDraw,ImageFont,ImageFilter from django.conf import settings def create_validate_with_conf(): ''' @生成验证码图片 @configItem size: 图片的大小，格式（宽，高），默认为(120, 30) @configItem img_type: 图片保存的格式，可选的为GIF，JPEG，TIFF，PNG @configItem mode: 图片模式，例如RGB @configItem bg_color: 背景颜色，默认为白色 @configItem font_size: 验证码字体大小 @configItem fontType: 验证码字体 @configItem tipFontType: 提示文本字体 @configItem draw_lines: 是否绘制干扰线 @configItem line_range: 干扰线的条数范围，格式为tuple，例如(1, 2)，只有draw_lines为True时有效 @configItem draw_points: 是否绘制干扰点 @configItem point_chance: 干扰点出现的概率，大小范围 @return: [0]: PIL Image实例 @return: [1]: 验证码图片中的字符串 ''' size = settings.CAPTCHA_CONF['size'] img_type = settings.CAPTCHA_CONF['img_type'] mode = settings.CAPTCHA_CONF['mode'] bg_color = settings.CAPTCHA_CONF['bg_color'] font_size = settings.CAPTCHA_CONF['font_size'] font_type = settings.CAPTCHA_CONF['fontType'] TipFontType = settings.CAPTCHA_CONF['tipFontType'] draw_lines = settings.CAPTCHA_CONF['draw_lines'] n_line = settings.CAPTCHA_CONF['line_range'] draw_points = settings.CAPTCHA_CONF['draw_points'] point_chance = settings.CAPTCHA_CONF['point_chance'] random.seed(hash(time.time())) width, height = size # 宽， 高 img = Image.new(mode, size, bg_color) # 创建图形 draw = ImageDraw.Draw(img) # 创建画笔 if draw_lines: create_lines(draw, n_line, width, height) if draw_points: create_points(draw, point_chance, width, height) ft_color = random.sample(settings.CAPTCHA_CONF['colorList'], 2) #text = u"请输入和这句话一样颜色的字" text = u"请输入和图中弧线一样颜色的字" realline = random.choice([True, False]) subj = random.choice(settings.CAPTCHA_DICT['nouns']) obj = random.choice(settings.CAPTCHA_DICT['nouns']) pred = random.choice(settings.CAPTCHA_DICT['verbs']) rst = subj + pred + obj subj = random.choice(settings.CAPTCHA_DICT['nouns']) obj = random.choice(settings.CAPTCHA_DICT['nouns']) pred = random.choice(settings.CAPTCHA_DICT['verbs']) fst = subj + pred + obj if realline: create_strs(draw, font_type, font_size, width,height, ft_color[0], rst, 8) create_strs(draw, font_type, font_size, width,height, ft_color[1], fst, 2) else: create_strs(draw, font_type, font_size, width,height, ft_color[0], fst, 8) create_strs(draw, font_type, font_size, width,height, ft_color[1], rst, 2) # 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 # ] params = [1 - float(random.randint(1, 2)) / 10000, 0, 0, 0, 1 - float(random.randint(1, 2)) / 10000, float(random.randint(1, 2)) / 50000, 0.001, float(random.randint(1, 2)) / 50000 ] # img = img.transform(size, Image.PERSPECTIVE, params) # 创建扭曲 # img = img.filter(ImageFilter.RankFilter(size = 3, rank = 3)) # draw = ImageDraw.Draw(img) # if realline: # create_tip_strs(draw, TipFontType, 14, width,height, ft_color[0], text, 1.1) # else: # create_tip_strs(draw, TipFontType, 14, width,height, ft_color[1], text, 1.1) if realline: create_color_arc(draw, ft_color[0], width, height) else: create_color_arc(draw, ft_color[1], width, height) create_tip_strs(draw, TipFontType, 14, width,height, (0,0,0), text, 1.1) return img, rst def create_lines(draw, n_line, width, height): '''绘制干扰线''' line_num = random.randint(n_line[0], n_line[1]) # 干扰线条数 for i in range(line_num): # 起始点 fclr = random.choice(settings.CAPTCHA_CONF['colorList']) begin = (random.randint(0, width), random.randint(0, height)) # 结束点 end = (random.randint(0, width), random.randint(0, height)) draw.line([begin, end], fill=fclr) def create_color_arc(draw, color, width, height): '''显色弧''' # 起始点 beginx,beginy = random.randint(0, width/2), random.randint(0, height/2) # 结束点 #endx,endy = (beginx+random.randint(0, width-beginx)), beginy+random.randint(0, height-beginy) endx,endy = random.randint(width/2, width),random.randint(height/2, height-20) draw.arc([beginx,beginy,endx,endy],0,120,fill=color) draw.arc([beginx+1,beginy,endx+1,endy],0,120,fill=color) draw.arc([beginx-1,beginy,endx-1,endy],0,120,fill=color) draw.arc([beginx,beginy+1,endx,endy+1],0,120,fill=color) draw.arc([beginx,beginy-1,endx,endy-1],0,120,fill=color) def create_points(draw, point_chance, width, height): '''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) fclr = random.choice(settings.CAPTCHA_CONF['colorList']) if tmp > 100 - chance: draw.point((w, h), fill=fclr) def create_strs(draw, font_type, font_size, width, height, fg_color, strs, ofs): '''绘制验证码字符''' #c_chars = random.sample(chars, length) # c_chars=random.sample(rjs, length) # 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) / ofs), strs, font=font, fill=fg_color) def create_tip_strs(draw, font_type, font_size, width, height, fg_color, strs, ofs): '''绘制验证码字符''' font = ImageFont.truetype(font_type, font_size) font_width, font_height = font.getsize(strs) beginx , beginy = (width - font_width) / 8, (height - font_height) / ofs draw.rectangle((beginx,beginy,beginx+font_width,beginy+font_height),fill=(255,255,255)) draw.text((beginx,beginy), strs, font=font, fill=fg_color)