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Model simplification method for keeping appearance characteristics

A technology for model simplification and appearance, applied in the field of model part simplification that maintains appearance features, it can solve problems such as loss, underestimation error, deformation of model surface detail features, etc., to achieve the effect of avoiding errors and simplifying maintenance.

Active Publication Date: 2012-05-30
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 method for simplification of model parts that maintains appearance features provided by the present invention introduces an image processing method on the basis of the traditional QEM algorithm, 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 visually important weight, which becomes a basic basis for edge folding, and then when using this operator, it increases the weight of Considering the curvature factor, the visually important sides and the sides with sharp curvature changes are preserved at the same time when folding each time, so that the greatly simplified model can still retain better appearance and shape features.

[0037] Below in conjunction with accompanying drawing, the present invention will be further described with specific embodiment:

[0038] Step 1: Preprocessing of texture image: using Mallat wavelet edge dete...

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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 method for simplifying model parts while maintaining appearance characteristics. Background technique [0002] In 1997, Garland proposed the quadric error metric (Quadric Error Metric) based edge folding simplification algorithm (referred to as QEM algorithm) (refer to literature 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 vertices to the relevant triangular planes 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 value to the edge confirmed as the bounda...

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Application Information

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Patent Type & Authority Patents(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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