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A real-time realistic rendering method of human heart

A heart and human body technology, applied in the field of real rendering and surface rendering, it can solve the problems of complex heart surface physics and unsatisfactory heart real-time rendering methods, and achieve the effects of real-time rendering performance, soft heart, and high real-time frame rate.

Active Publication Date: 2017-09-01
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: in cardiac surgery simulation and medical training, the realistic rendering of the heart surface is very important to improve the experience of the participants, but due to the physical complexity of the heart surface, the existing heart real-time rendering methods are not satisfactory

Method used

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  • A real-time realistic rendering method of human heart
  • A real-time realistic rendering method of human heart
  • A real-time realistic rendering method of human heart

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Embodiment Construction

[0032] Further description will be made below in conjunction with the accompanying drawings and specific embodiments of the present invention.

[0033] 1. Texture Space Subsurface Scattering

[0034] Donner et al. proposed a multi-dipole model based on the single-dipole model and used the Gaussian kernel function to approximate the multi-dipole model. That is, for the analytical expression R(r) of the diffusion partition map, we can find k w i is the weight v i is the variance, r is the Gaussian kernel function G(v i , r) to approximate, as shown in formula 1:

[0035]

[0036] in,

[0037]

[0038] The texture space scattering technology proposed by Green et al. can effectively use the properties of the Gaussian kernel function to effectively simulate the subsurface scattering effect of the skin surface. The drawing process is as follows:

[0039] 1). Draw shadow map

[0040] 2). Draw the stretch correction map

[0041] 3). Draw lightmaps to offline textures

...

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Abstract

The invention discloses a real-time realistic drawing method of human heart. First, use the texture space subsurface rendering method and the translucent transfer method to effectively draw the effect of the subsurface on the surface of the heart; then, combine the bump map and the Kelemen / Szirmay‑Kalos lighting model to render the effect of the mucus covering the surface of the heart; finally , combined with subsurface scattering, mucus coverage, and other basic effects on the surface of the heart to produce the rendering of the surface of the heart. Experimental results show that the real-time realistic rendering method of human heart has higher rendering efficiency and realism.

Description

technical field [0001] The invention belongs to the technical field of real rendering and surface rendering, and in particular relates to a subsurface rendering method based on texture space, a real-time translucent transmission method and a mucus-covered surface rendering method. Background technique [0002] Combining virtual reality and digital medicine, virtual surgery technology has been highly recognized by clinicians for its advantages of repeatability, low risk, and precise modeling. It provides a new technical approach for doctors' surgical skill training and surgical rehearsal. At the same time, the fidelity of the virtual surgery scene directly affects the practice effect of the participants, which is a major challenge for the real virtual surgery scene. Aiming at the real-time rendering and real-time requirements of the realistic rendering of the cardiac organs encountered in the construction of the virtual heart surgery support platform, this paper proposes a re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/30G06T15/00G06T15/50
Inventor 张忍王莉莉郝爱民潘俊君
Owner BEIHANG UNIV
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