Block Adjustment Based on New Strict Geometric Model of Satellite Images with High Resolution

The satellite image with high resolution has been commercially available since early 21st century, and the generation of digital elevation model and Ortho-image with lower costs and shorter period from these high-resolution images has become practical. But at first one must calculate the parameters of these high-resolution images. Recently, A new strict geometric model, based on affine transformation, for RSIHR was proposed. In the new model, there are eight affine coefficients and one slantwise angle for each image. However, in order to calculate the nine parameters, more than five control points are needed. Therefore, many control points should be used in a block for the new model. It is difficult to acquire many control points in a block, and block adjustment with the new model based few control points is necessary for computing the parameters of every image in the block. After the new strict geometric model, based on affine transformation, for RSIHR is briefly presented, the method of the block adjustment with the new model is introduced in this paper. At last, the method of the block adjustment with the new model has been tested for IKONOS and other HRSI. The block adjustment based on RPC parameters with IKONOS images has been tested also and compared with the new strict geometric model. All the tested result shows that the accuracy of the new model can reach the level corresponding to the ground resolution of the images. * Corresponding author.