Surveying and mapping information sand table data processing method

Abstract

The invention provides a surveying and mapping information sand table data processing method, which comprises the following steps: firstly, designing a three-dimensional halftone algorithm of a curved surface feature, the principle of the three-dimensional halftone algorithm of the curved surface feature being that the illusion of continuous tones being generated through the specific distribution of binary points of an area image; therefore, the visual gray value of the spray painting point of the sand table being related to the binary output of the current point of the three-dimensional model; wherein the curved surface characteristic of the curved surface in the area of the painting point needs to be extracted, and the change of the area of the curved surface and the bending degree of the curved surface have a direct relation, so that the bending degree of the curved surface is discretely expressed through the curvature of each point of the three-dimensional model; introducing the Gaussian curvature into an error item of a three-dimensional halftone algorithm of the curved surface characteristics to make up the color fading phenomenon caused by the fact that the spraying area of a three-dimensional curved surface is increased compared with that of a two-dimensional plane. A high-precision live-action sand table model can be obtained, model color fading is reduced through an algorithm, and the service life of the sand table is prolonged.

Description

technical field [0001] The invention relates to the technical field of 3D manufacturing, in particular to a sand table data processing method for surveying and mapping information. Background technique [0002] In recent years, with the maturity of computer 3D technology and the development of plane inkjet, more and more demands for three-dimensional inkjet have emerged, which has become a new direction for the development of inkjet technology, with good development potential and broad application prospects. However, the industry has not yet formed a unified definition and concept for three-dimensional inkjet printing. The related research and application are very different from those of plane inkjet printing, and there is no mature theoretical system to support it. [0003] Acquisition of satellite remote sensing data and extraction of geographic model data before reality model making. There are two types of data needed to make a real-world geographic model: terrain DEM da...

AI Technical Summary

Problems solved by technology

In three-dimensional inkjet printing, if the two-dimensional halftone processing algorithm is directly used, the color will become lighter and distorted in the area with a large slope of the three-dimensional model

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