| Summary: | 碩士 === 國立政治大學 === 地政研究所 === 96 === Existing aerial images and related spatial data are suitable for control data in aerial photogrammetry. This study will employ the concept of object space matching to generate the orthoimage control patches of plane features from existing aerial images data and digital surface model acquired from aerial image matching or airborne LIDAR surveying. Afterwards, those orthoimage control patches will be used to determine exterior orientation of aerial images by the concept of object space matching. Essentially, object space matching is based on the concept of groundel. The terrain surface condition is described by radiative information and geometric information in each groundel, i.e. each location (or pixel) in orthoimage control patches. The corresponding grey value of each pixel in each aerial image is transformed by the collinear condition and the adjustment of radiative information of groundel. According to the above-mentioned relationship, the relevant theory for generation of orthoimage control patches and exterior orientation determination of aerial images will be developed based on the comparison of grey value between each groundel and each corresponding aerial image pixel. To verify the feasibility of our derived theory, the aerial image data acquired from different period will be utilized for the test. Meanwhile, the relevant problems will be discussed and investigated in the experiments.
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