针对单一影像建模技术构建区域古建筑实景三维模型无法满足文物保护精度要求的难题，提出一种激光与影像融合优化区域古建筑实景三维模型的建模方法。首先以无人机环绕交叉航摄与近景摄影结合获取目标区域影像建模数据，通过三维激光扫描仪获取无人机航摄盲区激光扫描数据；其次将激光扫描数据与影像数据融合配准得到目标区域完整点云模型，进而以此重建得到区域精细化实景三维模型；最后通过异源数据融合误差分析，并与单一影像建模成果进行精度和纹理完整度对比分析验证所提方法的优越性。结果表明：异源数据拟合精度高，该方法所构建的区域古建筑实景三维模型精度高、纹理完整性好，为实现目标范围内古建筑群精细化建模提供了技术参考，在完善古筑三维数字模型储存档案库方面具有广泛的应用前景。

Addressing the challenge of insufficient accuracy in building regional cultural heritage 3D models using single-image modeling techniques, a method for optimizing regional ancient architectural three-dimensional models through the fusion of laser and imagery was proposed. Initially, imagery data of the target area was acquired through drone-based cross-flight aerial photography combined with close-range photography. Subsequently, laser scanning data was obtained using a 3D laser scanner to cover blind spots from drone aerial photography. Then, the laser scanning data was fused and registered with the imagery data to generate a complete point cloud model of the target area, which is then used to reconstruct a refined 3D model of the regional cultural heritage. Finally, the superiority of the proposed method was validated through error analysis of the fused heterogeneous data and comparative analysis of accuracy and texture completeness with single-image modeling results. The results indicate that the fused heterogeneous data achieves high fitting accuracy, and the resulting regional ancient architectural 3D model exhibits high accuracy and texture completeness, thereby providing valuable technical reference for the detailed modeling of ancient architectural complexes within the target scope and holding broad application prospects in enhancing the digital archive storage of ancient architectural three-dimensional models.