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Model simplification method for keeping appearance characteristics

A technology of appearance and model parts, applied in the field of real-time rendering of computer graphics, can solve problems such as loss, underestimation error, deformation of model surface details, etc., and achieve the effect of avoiding error and simplifying maintenance

Active Publication Date: 2011-04-20
常熟紫金知识产权服务有限公司
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Problems solved by technology

Therefore, it is possible that v is not compared with the nearest point on the geometry, but is compared with the nearest point on the attribute, which may underestimate the actual error, and sometimes the details of the model surface will be deformed or even lost

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  • Model simplification method for keeping appearance characteristics
  • Model simplification method for keeping appearance characteristics
  • Model simplification method for keeping appearance characteristics

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Embodiment Construction

[0036] The model part simplification method for maintaining the appearance features provided by the present invention, on the basis of the traditional QEM algorithm, introduces an image processing method, and simplifies the geometry according to a new simplification operator. Because before simplification, by performing edge detection on the original texture image, each edge is assigned a weight of visual importance, which becomes a basic basis for edge folding. Considering the curvature factor, the visually important edges and edges with sharp curvature changes are retained at the same time when folded each time, so that the simplified model can still retain good appearance and shape characteristics.

[0037] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings:

[0038] Step 1: Preprocessing of texture image: Extract edge features from texture image using Mallat wavelet edge detection algorithm

[0039...

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Abstract

The invention relates to the technical field of real-time drawing based on computer graphics, in particular to a model piece simplification method for keeping appearance characteristics. In the method, on the basis of the traditional QEM (quadric error metric) algorithm, an image processing method is introduced, and a geometry is simplified based on a new simplified operator; before simplification, edge detection is carried out on an original texture image and an importance weighted value is added to each edge on visual effect, which becomes an essential basis of edge folding; and then while the operator is used again, consideration on a curvature factor is increased, so visually important edges and edges with sharp curvature change are reserved at the same time in the case of folding every time, and the drastically simplified model can still keep better appearance and shape characteristics.

Description

technical field [0001] The invention relates to the technical field of real-time rendering of computer graphics, in particular to a model part simplification method for maintaining appearance features. Background technique [0002] In 1997, Garland proposed an edge-folding simplification algorithm based on Quadric Error Metric (referred to as the QEM algorithm) (refer to Reference 1), which is the best mesh model simplification algorithm achieved so far in terms of effect and performance. , he uses the sum of the squares of the distances from the vertex to the relevant triangular plane as the error measure, which can generate a high-quality simplified model, and the error term is in the form of a quadratic surface equation, which is very convenient to express in a matrix and can be calculated in advance, so the speed of simplification is quickly. The QEM algorithm usually assigns a large error measure to the edge identified as a boundary to avoid premature folding of the bo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/20
Inventor 何发智万方
Owner 常熟紫金知识产权服务有限公司
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