地面序列影像的高陡边坡高精度三维建模方法

High-precision 3D modeling method based on terrestrial image sequences for high and steep slope

本文针对高陡边坡地形特点，介绍一种基于普通数码相机的多基线地面摄影测量方法，重点研究了普通数码相机的量测化方法和高陡边坡序列数码影像的匹配方法。通过对普通数码相机的量测化，提高了高陡边坡地区数据采集的效率，降低了作业对影像控制和算法的要求；采用种子点与多重约束相结合的多基线匹配方式，解决了高陡边坡序列数码影像匹配中存在的遮挡多、左右片变形大、比例尺不一致等匹配难题。上述建模过程快速且能获得很高精度，实验表明三维建模的相对精度达1／8000～1／12000。

Aiming at the topographical features of high and steep slope, the paper introduced a terrestrial photogrammetric method of multi-baseline based on digital camera, and mainly studied the metrization method of common digital camera and matching method of the digital image sequences of high steep slope area. Through the metrization of common digital camera, the efficiency of terrain data collection was increased in the high steep slope area, and the limitations of operations on the image control and algorithm were reduced. The combination of seed points and multiple constraints in multi-baseline stereo matching would help to solve many problems, such as shading, severe distortion between the left image and the right one, and the inconformity of scale. The modeling process stated above was quite fast and highly precise, and the three-dimensional modeling experiments showed that the relative accuracy could reach from 1/8000 to 1/12000.