When making dynamic 3D sand table, the terrain expression on the surface of the sand table is generally completed by pro-jecting remote sensing images from a projector. Because the 3D terrain has the characteristics of ups and downs, when projecting the dynamic sand table, there will be local image offset and poor local matching accuracy between the image and the 3D terrain. In re-sponse to solve the above problems, this paper proposes an inverse digital differential correction technology, which first corrects the oblique and offset of the image, and then provides two solutions: forward solution and inverse solution, which realizes the conversion from the orthophoto image to the central projection image, and could solve the problems of local offset and poor matching accuracy of the image during projecting.
关键词
数字微分纠正/动态沙盘/中心投影/影像校正/梯形校正
Key words
digital differential correction/dynamic sand table/central projection/image correction/trapezoidal correction
维普
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