Aerial triangulation encryption method and system

Abstract

The invention provides an aerial triangulation encryption method and system, and the method comprises the steps: carrying out the aerial triangulation matching of an original image data set through a photogrammetry technology, and obtaining an aerial triangulation point cloud; then, according to the one-to-one correspondence relation between the aerial three point clouds and the images, selecting a target image set covering all the point clouds from the original image data set through a preset algorithm; and finally, based on the aerial three point cloud corresponding to the target image set, performing point cloud encryption through adoption of an interpolation method, and obtaining dense point cloud. According to the method, free network point clouds are obtained through aerial triangulation matching, data cleaning is automatically performed on redundant image data according to the one-to-one correspondence relationship between the point clouds and the images, so that the point clouds corresponding to the redundant images do not participate in point cloud encryption, the redundant images can be accurately eliminated, and the point cloud encryption efficiency can be improved. According to the method and system, the original image data can be automatically and accurately adjusted in the redundant image cleaning process by utilizing an algorithm program, so that the image data cleaning accuracy is improved. The probability of mistaken deletion and less deletion is reduced.

Description

technical field [0001] The invention relates to the field of air triangulation encryption, in particular to an air triangulation encryption method and system. Background technique [0002] At present, commonly used point cloud encryption methods include grid encryption method and interpolation method. [0003] The grid encryption method can directly set the point cloud density of the grid (for example, 50 points to 200 points can be set for each grid) for point cloud encryption. The whole process does not require manual intervention and is automatically completed by the program. Each grid The more the number of point clouds, the denser the point cloud. But even if the number of point clouds in the grid reaches the maximum value, the point cloud encrypted in this way cannot meet the requirements of point cloud data modeling. Refers to setting the point cloud density of each grid. [0004] The interpolation method is to use the sparse point cloud for interpolation encryptio...

AI Technical Summary

Problems solved by technology

However, the greater the density of the interpolated empty three-point cloud, the longer the processing time required; compared with the grid encryption method, the interpolation method is less efficient and takes a long time

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