154 lines
6.9 KiB
Python
154 lines
6.9 KiB
Python
from PIL import Image, ImageDraw, ImageFont, ImageFilter, ImageOps
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import random
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import string
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import math
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def generate_complex_click_captcha(
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width=500,
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height=350,
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total_chars=15, # 总字符数增加
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target_count=4,
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font_size_range=(25, 40), # 字符大小随机
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bg_text_count=8 # 背景干扰文字数量
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):
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"""生成更复杂的点击式文字验证码"""
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# 1. 创建背景（带纹理的渐变色）
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image = Image.new('RGB', (width, height), (255, 255, 255))
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draw = ImageDraw.Draw(image)
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# 绘制背景纹理（随机噪点+轻微模糊）
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for _ in range(width * height // 20): # 密集噪点
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x = random.randint(0, width)
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y = random.randint(0, height)
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color = (random.randint(220, 240), random.randint(220, 240), random.randint(220, 240))
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draw.point((x, y), fill=color)
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image = image.filter(ImageFilter.GaussianBlur(radius=1.5))
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# 2. 添加背景干扰文字（大字号、半透明、覆盖范围广）
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bg_chars = '天地日月风云雨雪春夏秋冬金木水火土'
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try:
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bg_font = ImageFont.truetype('simhei.ttf', random.randint(60, 100))
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except:
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bg_font = ImageFont.load_default()
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for _ in range(bg_text_count):
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char = random.choice(bg_chars)
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x = random.randint(-50, width + 50) # 允许超出边界
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y = random.randint(-50, height + 50)
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color = (random.randint(200, 230), random.randint(200, 230), random.randint(200, 230), 100) # 半透明灰
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angle = random.randint(-45, 45)
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# 绘制半透明背景文字
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bg_img = Image.new('RGBA', (width, height), (255, 255, 255, 0))
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bg_draw = ImageDraw.Draw(bg_img)
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bg_draw.text((x, y), char, font=bg_font, fill=color)
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bg_img_rotated = bg_img.rotate(angle, expand=True)
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image.paste(bg_img_rotated, (0, 0), bg_img_rotated) # 覆盖粘贴
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# 3. 生成核心字符集（中文+字母+数字混合）
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chinese_chars = '一二三四五六七八九十甲乙丙丁戊己庚辛壬癸子丑寅卯辰巳午未申酉戌亥'
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all_chars = list(chinese_chars + string.ascii_letters + string.digits)
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random.shuffle(all_chars)
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used_chars = all_chars[:total_chars]
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target_chars = random.sample(used_chars, target_count)
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# 4. 加载主字体（多种字体随机选择，增强复杂度）
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fonts = ['simhei.ttf', 'simsun.ttc', 'microsoftyahei.ttf'] # 可添加更多字体路径
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try:
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selected_font = random.choice(fonts)
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except:
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selected_font = None
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# 5. 随机分布核心字符（带复杂干扰）
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char_positions = {} # {字符: (中心x, 中心y)}
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for char in used_chars:
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# 随机字体大小
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font_size = random.randint(*font_size_range)
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# 加载字体
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try:
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font = ImageFont.truetype(selected_font, font_size) if selected_font else ImageFont.load_default()
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except:
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font = ImageFont.load_default()
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# 随机位置（边缘留出更大空间，避免重叠）
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x = random.randint(font_size * 2, width - font_size * 2)
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y = random.randint(font_size * 2, height - font_size * 2)
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# 随机颜色（目标与干扰字符颜色可能接近）
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if char in target_chars:
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# 目标字符颜色：深色系，可能与干扰色接近
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color = (random.randint(30, 120), random.randint(30, 120), random.randint(30, 120))
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else:
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# 干扰字符颜色：与目标色有重叠区间
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color = (random.randint(50, 150), random.randint(50, 150), random.randint(50, 150))
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# 更大范围的旋转角度（-60到60度）
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angle = random.randint(-60, 60)
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# 绘制带旋转和轻微扭曲的字符
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char_img = Image.new('RGBA', (font_size * 3, font_size * 3), (255, 255, 255, 0))
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char_draw = ImageDraw.Draw(char_img)
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char_draw.text((font_size, font_size), char, font=font, fill=color)
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# 轻微扭曲处理（仿射变换）
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if random.random() > 0.3: # 30%概率扭曲
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# 简单扭曲参数
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dx = random.randint(-5, 5)
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dy = random.randint(-5, 5)
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char_img = char_img.transform(
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char_img.size,
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Image.AFFINE,
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(1, 0.1 * dx, 0, 0.1 * dy, 1, 0)
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)
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char_rotated = char_img.rotate(angle, expand=True)
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rx, ry = char_rotated.size
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paste_x = x - rx // 2
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paste_y = y - ry // 2
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image.paste(char_rotated, (paste_x, paste_y), char_rotated)
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# 记录中心坐标（修正旋转偏移）
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char_positions[char] = (x, y)
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# 6. 添加干扰曲线（2-4条贝塞尔曲线）
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def bezier_curve(start, end, control_points, steps=50):
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"""生成贝塞尔曲线路径"""
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points = [start]
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for t in range(1, steps + 1):
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t /= steps
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# 贝塞尔曲线公式（简化版，2个控制点）
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x = (1-t)**3 * start[0] + 3*(1-t)**2*t*control_points[0][0] + 3*(1-t)*t**2*control_points[1][0] + t**3*end[0]
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y = (1-t)**3 * start[1] + 3*(1-t)**2*t*control_points[0][1] + 3*(1-t)*t**2*control_points[1][1] + t**3*end[1]
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points.append((x, y))
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return points
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for _ in range(random.randint(2, 4)):
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# 随机曲线参数
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start = (random.randint(0, width), random.randint(0, height))
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end = (random.randint(0, width), random.randint(0, height))
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control1 = (random.randint(0, width), random.randint(0, height))
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control2 = (random.randint(0, width), random.randint(0, height))
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curve = bezier_curve(start, end, [control1, control2])
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# 曲线颜色（与字符颜色有重叠）
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line_color = (random.randint(80, 180), random.randint(80, 180), random.randint(80, 180))
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draw.line(curve, fill=line_color, width=random.randint(2, 4))
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# 7. 添加颗粒噪点（覆盖字符，增加识别难度）
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for _ in range(width * height // 50):
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x = random.randint(0, width)
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y = random.randint(0, height)
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noise_color = (random.randint(100, 200), random.randint(100, 200), random.randint(100, 200))
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# 随机大小的噪点（1-3像素）
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draw.rectangle([(x, y), (x + random.randint(1, 3), y + random.randint(1, 3))], fill=noise_color)
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# 8. 轻微锐化，增强边缘（反模糊）
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image = image.filter(ImageFilter.SHARPEN)
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# 9. 获取目标字符坐标
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target_positions = {char: char_positions[char] for char in target_chars}
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return image, target_chars, target_positions
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# 生成复杂点击式验证码
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complex_click_img, complex_targets, complex_coords = generate_complex_click_captcha()
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complex_click_img.save('complex_click_captcha.png')
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print(f"需点击的文字：{complex_targets}")
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print(f"对应坐标：{complex_coords}") |