Method and system for intelligent digital generation of 3D model based on 2D shadow information

Abstract

The invention relates to a three-dimensional intelligent digitalization generation method and system based on two-dimensional shadow information. The method includes the step of generating two-dimensional shadows, the step of building a three-dimensional model and the step of hiding two-dimensional information, wherein in the step of generating the two-dimensional shadows, images or pictures are converted into two-dimensional shadow images through an image processing technology; in the step of building the three-dimensional model, pixels in the two-dimensional shadow images generate two-dimensional point cloud data, third-dimensional coordinate data are given, and three-dimensional point cloud data are sequenced again to form the three-dimensional model; in the step of hiding the two-dimensional information, the three-dimensional point cloud data are itemized in the two-dimensional direction and stacked in the third-dimensional direction to form multiple branches, and perspective projection transformation is carried out on the three-dimensional point cloud data so that information of the two-dimensional shadow images is hidden in the three-dimensional model. By means of the method, the shadow, presented through projection according to the illumination angle, of the three-dimensional model where the two-dimensional shadow information is hidden is of the shape of the original images or pictures.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to a method and system for intelligently digitally generating a three-dimensional model based on two-dimensional shadow information. Background technique [0002] With the continuous advancement of technological development, 3D intelligent digitization and 3D printing technology are constantly merging and developing rapidly. Its application fields are becoming more and more extensive. In recent years, 3D modeling has played a huge role in the actual manufacturing process of industrial engineering fields such as geographic information, urban architecture, mechatronics, medical treatment and aerospace; especially, 3D modeling The continuous compatibility and technological development of mold and 3D printing have made the application of 3D intelligent digital technology more and more perfect, realizing a new realm of using "virtual" to recreate "reality", and gradually expand...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical characteristics pursued by the traditional three-dimensional modeling technology. Most of the problems caused by the use of multiple images, photos or pictures to generate a three-dimensional model, and the shape of the shadow projected by it is uncontrollable and does not contain any meaning. It provides a An intelligent digital generation method for 3D models based on 2D shadow information, by converting a single photo or picture into a 2D shadow image, and hiding the 2D shadow image information in the 3D model after constructing the 3D model, it is possible to hide the 2D The 3D model of the shadow information is projected by the angle of the light, and the shadow presented is the shape of the original picture or photo

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