Real-time rendering method for multilayer inhomogeneous material reflecting object

Abstract

The invention provides a real-time rendering method for a multilayer inhomogeneous material reflecting object, wherein the method is improved based on a BRDF model. The method comprises the following steps of S10, describing non-uniformity of a ceramic glaze surface in a prepare baking thickness mapping method; S20, obtaining a summit illumination strength calculation formula and an illumination distribution function in the improved BRDF illumination model; and S30, performing brightness adjustment by means of high dynamic range for simulating flexible transition of light on the surface of the ceramic. A model which is rendered through the method accords with an illumination physical characteristic of multilayer inhomogeneous material surface illumination and furthermore can vividly restore a real impression of the multilayer inhomogeneous material object. Furthermore on the condition of relatively large number of sides of the model, high real-time rendering rate can be ensured and a real-time interaction requirement is satisfied.

Description

technical field [0001] The invention relates to the technical field of computer graphics rendering, in particular to a method for real-time rendering of a three-dimensional reconstruction model with real light perception, in particular to a method for real-time rendering of reflective objects with multi-layer non-uniform materials. Background technique [0002] The three-dimensional image reconstruction technology is to calculate the spatial coordinates and optical information through stereo matching of multi-view images taken by the entity, so as to obtain the digital three-dimensional geometric mesh model and texture information of the object. In reality experiments, there is a problem that the surface light perception information of the texture map generated after object reconstruction will be partially lost during the reverse reconstruction process, resulting in light perception distortion. Therefore, in order to restore the 3D model close to the photorealistic light perc...

AI Technical Summary

Problems solved by technology

[0004] 1) Use BSSRDF to draw multi-layered and highly reflective objects such as ceramics. It is generally difficult for existing global illumination algorithms to ensure real-time and realistic rendering when dealing with dynamic objects. In addition, due to non-uniform materials generally have space or variability in time, the modeling description of its properties is more complex, so real-time rendering of such multi-layer materials is more difficult

[0005] 2) The real light perception effect of multi-layer reflective material objects obtained by using the BRDF lighting model is far from meeting the needs of human vision, and it is extremely difficult and expensive to establish a complex and realistic lighting model

However, if it is directly applied to the rendering of colored ceramic materials, the light perception shown is relatively blunt, which cannot well reflect the real light perception of non-uniform glazed surfaces.

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