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一、概述 SPOT卫星所获得的影像,地面分辨率高(全色方式垂直扫描时的地面分辨率为10米,多光谱方式为20米),并且在卫星的轨道两边可进行倾斜扫描,能获得基高比最大等于1.0的立体像对。所以SPOT影像适用于提取地表地形的变化信息,甚至可以进行空中三角测量。然而,如果要自动进行SPOT影像的立体量测,首先要对原始影像进行核线重采样,然后再用数字影像相关、匹配的方法,完成立体量测过程。 SPOT卫星的CCD阵列,安置在前置光学系统的焦平面上,并与轨道的方向垂直,每阵列包含6000(或3000)个像素,在每一成像时
I. Overview The images acquired by SPOT satellites have high ground resolution (full-color vertical resolution of 10 m and multi-spectral resolution of 20 m) and can be tilted on either side of the orbit of the satellite to obtain Stereo pairs with a base height ratio equal to 1.0. Therefore, SPOT image is suitable for extracting the change information of surface topography and can even perform aerial triangulation. However, if you want to automatically perform the SPOT image three-dimensional measurement, first of all the original image nuclear line resampling, and then use the digital image correlation, matching method to complete the three-dimensional measurement process. The CCD array of SPOT satellites is placed on the focal plane of the pre-optics and is perpendicular to the direction of the orbit, and contains 6000 (or 3000) pixels per array, at each imaging