微机遥感图像几何纠正快速算法

A PC BASED FAST ALGORITHM FOR GEOMETRIC RECTIFICATION OF REMOTE SENSING IMAGE

本文针对遥感图像数据量大、微机几何纠正速度慢的问题，提出了一种微机遥感图像几何纠正快速算法。该算法采取了行列分离多项式快速运算、自动优化分块分配内存、多波段同时处理等措施，大大提高了运算速度，并且对任意大图像可一次处理，无需分块，使微机遥感图像几何纠正方法完全达到实用要求。文中阐述了算法的技术细节，介绍了算法在微机上的实现和其速度指标。

It is difficult to geometrically rectify remote sensing images in personal computer because of the large data. A PC-based fast algorithm of geometric rectification is presented to solve this problem. Three techniques are adopted in the algorithm: (1) fast calculating the polynormal by separating column items from rows; (2) accessing optimal rectangle sub-image according to the allocated computer memory; (3) processing all bands simultaneously. These techniques make the algorithm fast and suitable for images with any size. The implementation and performance of the algorithm are also discribed in this paper.