Add slide and rotate interactive captcha solvers
New solver subsystem with independent models: - GapDetectorCNN (1x128x256 grayscale → sigmoid) for slide gap detection - RotationRegressor (3x128x128 RGB → sin/cos via tanh) for rotation angle prediction - SlideSolver with 3-tier strategy: template match → edge detect → CNN fallback - RotateSolver with ONNX sin/cos → atan2 inference - Generators, training scripts, CLI commands, and slide track utility Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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generators/rotate_solver_gen.py
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generators/rotate_solver_gen.py
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"""
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旋转验证码求解器数据生成器
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生成旋转验证码训练数据：随机图案 (色块/渐变/几何图形)，随机旋转 0-359°。
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裁剪为圆形 (黑色背景填充圆外区域)。
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标签 = 旋转角度 (整数)
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文件名格式: {angle}_{index:06d}.png
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"""
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import math
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import random
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from PIL import Image, ImageDraw, ImageFilter, ImageFont
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from config import SOLVER_CONFIG
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from generators.base import BaseCaptchaGenerator
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_FONT_PATHS = [
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"/usr/share/fonts/TTF/DejaVuSans-Bold.ttf",
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"/usr/share/fonts/TTF/DejaVuSerif-Bold.ttf",
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"/usr/share/fonts/liberation/LiberationSans-Bold.ttf",
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"/usr/share/fonts/liberation/LiberationSerif-Bold.ttf",
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"/usr/share/fonts/gnu-free/FreeSansBold.otf",
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]
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class RotateSolverDataGenerator(BaseCaptchaGenerator):
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"""旋转验证码求解器数据生成器。"""
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def __init__(self, seed: int | None = None):
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from config import RANDOM_SEED
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super().__init__(seed=seed if seed is not None else RANDOM_SEED)
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self.cfg = SOLVER_CONFIG["rotate"]
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self.height, self.width = self.cfg["input_size"] # (H, W)
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self._fonts: list[str] = []
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for p in _FONT_PATHS:
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try:
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ImageFont.truetype(p, 20)
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self._fonts.append(p)
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except OSError:
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continue
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def generate(self, text: str | None = None) -> tuple[Image.Image, str]:
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rng = self.rng
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# 随机旋转角度 0-359
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angle = rng.randint(0, 359)
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if text is None:
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text = str(angle)
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size = self.width # 正方形
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radius = size // 2
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# 1. 生成正向图案 (未旋转)
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content = self._random_pattern(rng, size)
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# 2. 旋转图案
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rotated = content.rotate(-angle, resample=Image.BICUBIC, expand=False)
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# 3. 裁剪为圆形 (黑色背景)
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result = Image.new("RGB", (size, size), (0, 0, 0))
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mask = Image.new("L", (size, size), 0)
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mask_draw = ImageDraw.Draw(mask)
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mask_draw.ellipse([0, 0, size - 1, size - 1], fill=255)
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result.paste(rotated, (0, 0), mask)
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# 4. 轻微模糊
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result = result.filter(ImageFilter.GaussianBlur(radius=0.5))
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return result, text
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def _random_pattern(self, rng: random.Random, size: int) -> Image.Image:
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"""生成随机图案 (带明显方向性，便于模型学习旋转)。"""
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img = Image.new("RGB", (size, size))
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draw = ImageDraw.Draw(img)
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# 渐变背景
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base_r = rng.randint(100, 220)
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base_g = rng.randint(100, 220)
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base_b = rng.randint(100, 220)
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for y in range(size):
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ratio = y / max(size - 1, 1)
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r = int(base_r * (1 - ratio) + rng.randint(40, 120) * ratio)
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g = int(base_g * (1 - ratio) + rng.randint(40, 120) * ratio)
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b = int(base_b * (1 - ratio) + rng.randint(40, 120) * ratio)
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draw.line([(0, y), (size, y)], fill=(r, g, b))
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cx, cy = size // 2, size // 2
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# 添加不对称几何图形 (让模型能感知方向)
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pattern_type = rng.choice(["triangle", "arrow", "text", "shapes"])
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if pattern_type == "triangle":
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# 顶部三角形标记
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color = tuple(rng.randint(180, 255) for _ in range(3))
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ts = size // 4
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draw.polygon(
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[(cx, cy - ts), (cx - ts // 2, cy), (cx + ts // 2, cy)],
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fill=color,
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)
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# 底部小圆
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draw.ellipse(
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[cx - 8, cy + ts // 2, cx + 8, cy + ts // 2 + 16],
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fill=tuple(rng.randint(50, 150) for _ in range(3)),
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)
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elif pattern_type == "arrow":
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# 向上的箭头
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color = tuple(rng.randint(180, 255) for _ in range(3))
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arrow_len = size // 3
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draw.line([(cx, cy - arrow_len), (cx, cy + arrow_len // 2)], fill=color, width=4)
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draw.polygon(
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[(cx, cy - arrow_len - 5), (cx - 10, cy - arrow_len + 10), (cx + 10, cy - arrow_len + 10)],
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fill=color,
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)
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elif pattern_type == "text" and self._fonts:
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# 文字 (有天然方向性)
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font_path = rng.choice(self._fonts)
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font_size = size // 3
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try:
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font = ImageFont.truetype(font_path, font_size)
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ch = rng.choice("ABCDEFGHJKLMNPRSTUVWXYZ23456789")
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bbox = font.getbbox(ch)
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tw, th = bbox[2] - bbox[0], bbox[3] - bbox[1]
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draw.text(
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(cx - tw // 2 - bbox[0], cy - th // 2 - bbox[1]),
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ch,
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fill=tuple(rng.randint(0, 80) for _ in range(3)),
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font=font,
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)
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except OSError:
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pass
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else:
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# 混合不对称形状
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# 上方矩形
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w, h = rng.randint(15, 30), rng.randint(10, 20)
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color = tuple(rng.randint(150, 255) for _ in range(3))
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draw.rectangle([cx - w, cy - size // 3, cx + w, cy - size // 3 + h], fill=color)
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# 右下小圆
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r = rng.randint(5, 12)
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color2 = tuple(rng.randint(50, 150) for _ in range(3))
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draw.ellipse([cx + size // 5, cy + size // 5, cx + size // 5 + r * 2, cy + size // 5 + r * 2], fill=color2)
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# 添加纹理噪声
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for _ in range(rng.randint(20, 60)):
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nx, ny = rng.randint(0, size - 1), rng.randint(0, size - 1)
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nc = tuple(rng.randint(80, 220) for _ in range(3))
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draw.point((nx, ny), fill=nc)
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return img
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