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A Bas-Relief Generation Method Based on Visual Saliency

A bas-relief and remarkable technology, applied in the direction of image data processing, instruments, etc., can solve complex problems, achieve the effect of enhancing detail information and maintaining surface detail information

Inactive Publication Date: 2017-02-22
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method exists to solve complex problems

Method used

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  • A Bas-Relief Generation Method Based on Visual Saliency
  • A Bas-Relief Generation Method Based on Visual Saliency
  • A Bas-Relief Generation Method Based on Visual Saliency

Examples

Experimental program
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Embodiment 1

[0053] This embodiment is to use the method of the present invention to figure 1 The three-dimensional model shown is compressed to generate bas-relief, and the specific steps are as follows:

[0054] (1) For the input 3D model, use a bilateral filter to calculate the saliency information of the 3D model.

[0055] Calculate the saliency information ζ(υ) of each vertex υ on the surface of the three-dimensional model, that is, the average height field of each vertex;

[0056]

[0057]

[0058] Among them, ζ(υ) represents the saliency information of each vertex υ on the surface of the 3D model; x represents the center point of the 3D model; υ represents any vertex on the surface of the 3D model; σ S Take 0.8; σ R Take 0.4; ξ(ν) represents the projection height of the vertex υ on the surface of the three-dimensional model in the direction of the z-axis; ξ(x) represents the projection height of the center point of the three-dimensional model in the direction of the z-axis; ...

Embodiment 2

[0068] This embodiment is to use the method of the present invention to Figure 4 The three-dimensional model shown is compressed to generate bas-relief, and the specific steps are as follows:

[0069] (1) For the input 3D model, the saliency information of the 3D model is calculated using a cross-bilateral filter.

[0070] Calculate the saliency information ζ(υ) of each vertex on the surface of the 3D model using Equation 2a-Equation 2e:

[0071]

[0072] Γ(x,ν)=exp[-||x-ν|| 2 / (2σ S ) 2 ] (Formula 2b)

[0073] Φ(x, ξ(ν))=exp[-||ξ(x)-ξ(ν)|| 2 / (2σ R ) 2 ] (Formula 2c)

[0074] Ψ(x, κ(ν))=exp[-||κ(x)-κ(ν)|| 2 / (2σ V ) 2 ] (Formula 2d)

[0075]

[0076] Among them, ζ(υ) represents the saliency information of each vertex v on the 3D model; x represents the center point of the 3D model; υ represents any vertex on the surface of the 3D model; σ represents the height standard deviation, and σ takes the center point x and Any value between the maximum value and th...

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Abstract

The invention relates to a visual saliency-based bas-relief generating method and belongs to the technical field of computer graphics. According to the visual saliency-based bas-relief generating method of the invention, visual information and geometric operation are combined with each other so as to realize the generation of a digital bas-relief. The visual saliency-based bas-relief generating method comprises the following steps that: firstly, significance information of the surface of a three-dimensional model is extracted; secondly, a nonlinear compression mode is adopted to realize the generation of the bas relief; and finally, visual information is fused into nonlinear compression such that a final bas-relief effect can be realized. According to the visual saliency-based bas-relief generating method of the invention, different kinds of information such as height and angle direction are adopted to extract the significance information, so that the detail information of the generated digital bas-relief can be better saved; the significance information is mapped to the generation of the bas-relief; and the extracted significance information of the surface of the three-dimensional model is combined with the geometric operation, such that the detail information can be enhanced; and the significance information is attached to the geometric operation, such that the detail information of the surface of a compressed three-dimensional object can be effectively maintained.

Description

technical field [0001] The invention belongs to the technical field of computer graphics, in particular to a method for generating shallow reliefs based on visual salience. The bas-relief model generated by the invention can be used as the input of computer-aided manufacturing equipment to manufacture relief products and provide a brand-new display form for education, entertainment and other fields. Background technique [0002] Relief is an art form between sculpture (round sculpture) and two-dimensional images. However, relief is different from ordinary sculptures. It occupies a small space, but its details are extremely rich. At the same time, the production of relief involves relief design and modeling. , spatial organization and a series of factors. At present, relief has a very wide range of applications. On the one hand, relief images (also known as pseudo-reliefs) can be used for web design, cartoon design, and packaging design; , and can be used to decorate the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T19/00
Inventor 王美丽郭诗辉牛晓静常建张建军张宏鸣何东健
Owner NORTHWEST A & F UNIV
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