基于激光散斑成像的高层建筑造型数字化建模研究

Research on digital modeling of high-rise building modeling based on laser speckle imaging

研究基于激光散斑成像的高层建筑造型数字化建模,可有效解决高层建筑造型由于高度较高、所需采集数据量众多导致建模精度低的缺陷。激光散斑成像技术通过高层建筑造型受激光照射形成的散斑观测点采集数据,将所采集数据通过建立虚拟规则格网、数学形态学滤波以及判断点属性三部分实施点云数据预处理,将完成预处理数据通过二次曲面拟合方法获取数字化建模初始配准阶段参数,将所获取参数利用迭代最近点算法实现激光散斑图像各点与高层建筑造型模型点精准配准,将完成配准的模型通过Photoshop软件实施纹理贴图等后期优化,将最终整体效果图导出实现高层建筑造型数字化建模。实验结果表明,采用该方法可实现高层建筑造型数字化建模,且所建立数字化模型坐标误差小于5 mm,具有较高的建模精度。

Research on the digital modeling of high-rise building modeling based on laser speckle imaging can effectively solve the defects of high-rise building modeling due to the high height and the large amount of data required to lead to low modeling accuracy. Laser speckle imaging technology collects data through speckle observation points formed by high-rise building modeling irradiated by laser. The collected data is subjected to point cloud data preprocessing through the establishment of virtual rule grids, mathematical morphological filtering, and judgment of point attributes. Complete the preprocessing data to obtain the initial registration stage parameters of digital modeling through the quadratic surface fitting method, and use the iterative closest point algorithm to achieve accurate registration of the points of the laser speckle image and the points of the high-rise building modeling model, and the registration will be completed The quasi-model is optimized by Photoshop for texture mapping and other post-optimization, and the final overall rendering is derived to realize digital modeling of high-rise building modeling. The experimental results show that this method can be used to achieve high-rise building modeling digital modeling, and the established digital model coordinate error is less than 5 mm, with high modeling accuracy.