Method _extract_polygon

modules/sam3_info_extractor.py:345–360

从mask提取多边形轮廓

(self, binary_mask: np.ndarray, 
                         min_area: int = 100, 
                         epsilon_factor: float = 0.02)

        return state, pil_image
    
    def _extract_polygon(self, binary_mask: np.ndarray, 
                         min_area: int = 100, 
                         epsilon_factor: float = 0.02) -> List[List[int]]:
        """从mask提取多边形轮廓"""
        contours, _ = cv2.findContours(binary_mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
        
        for cnt in contours:
            area = cv2.contourArea(cnt)
            if area < min_area:
                continue
            
            epsilon = epsilon_factor * cv2.arcLength(cnt, True)
            approx = cv2.approxPolyDP(cnt, epsilon, True)
            return approx.reshape(-1, 2).tolist()
        
        return []
    
    def clear_cache(self):
        """清空图像缓存"""