获取特征点.

def _get_result(self, method_name="kaze"):
        """获取特征点."""
        method_object = self.method_object_dict.get(method_name)
        # 提取结果和特征点:
        try:
            result = method_object.find_best_result()
        except Exception:
            import traceback
            traceback.print_exc()
            return [], [], [], None

        return method_object.kp_sch, method_object.kp_src, method_object.good, result