method for generating a 3D material map through a picture with multi-angle lighting

Abstract

The invention discloses a method for generating a 3D material map through a picture with multi-angle lighting. The method comprises the steps of image collection, image preprocessing, diffuse reflection map generation, normal map generation, replacement map generation, highlight map generation, transparency map generation and result output. The method has the advantages that the diffuse reflectionphenomenon of the texture of the material to light at different light angles is comprehensively simulated, and the generated diffuse reflection map reflects the light diffuse reflection attribute ofthe material more accurately; Compared with one-dimensional normal data obtained by a single picture, the three-dimensional normal data reflects the concave-convex of textures more accurately, so thatthe 3D real-time rendering effect is more real; Through the highlight map evolved by the normal map, the interference of pattern colors in the picture on acquisition of highlight attributes of the material can be effectively removed, and the generated highlight map reflects the reflection characteristics of the material more accurately; And through bottom polishing, the obtained picture truly reflects the light transmission of the material, so that the generated transparency map is more accurate.

Description

technical field [0001] The invention relates to a method for generating a 3D texture map, in particular to a method for generating a 3D texture map through multi-angle illuminated pictures, and belongs to the field of 3D virtual technology. Background technique [0002] The application of 3D virtual technology is becoming more and more widespread. However, in order to make the model rendering effect more realistic in the application of 3D virtual technology, high-quality 3D material library maps are required. At present, the material maps required by most 3D virtual software include (diffuse map Color, normal map Normals, displacement map Displacement, specular map Specular, transparency map Alpha). The current similar technology for generating textures is a simple conversion of a single color source image to generate 3D material textures. The disadvantages are: 1. When converting a single image, since the source image only contains the light and shadow direction informatio...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. When converting a single image, since the source image only contains the light and shadow direction information left when the light source is in a single direction, the converted normal map only contains normal information in one direction.

2. There is no way to generate a transparency map through a single source map

At the time, it simply decolorizes the image and converts it into a grayscale image, and uses different grayscale values ​​to represent the degree of transparency. This method is greatly affected by the color of the source image.

Images