Method for fitting regular grid by discrete point grading and weighting
A discrete point and grid technology, applied in the direction of 2D image generation, texture/color, filling plane with attributes, etc., can solve the problem of indirect interpolation method not considered, the retrieval efficiency of massive discrete point cloud is not high, etc., to improve efficiency Effect
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[0027] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.
[0028] The technical solution provided by the present invention is a method for fitting a regular grid DEM from massive disordered discrete point clouds by adopting a hierarchical weighting strategy. Such as figure 1 shown, including the following steps:
[0029] Step 1. Translate the target grid (grid size M) by half the grid in the X and Y directions (at this time, the center position of the grid is the grid point of the target grid), and refine the parameter P according to the grid ( figure 2 In the embodiment, P=3) performs grid expansion until a single grid (with a size of M*3 N ) fully encompasses all discrete point clouds. The largest layer of a single grid is defined as the first level, and then the target grid is the Nth level. Such as figure 2 Schematic diagram of the grid from level ...
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