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Real-time realistic drawing method of human heart

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

Active Publication Date: 2015-05-06
BEIHANG UNIV
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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

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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] R ( r ) ≈ Σ i = 1 k w i G ( v i , r ) - - - ( ...

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Abstract

The invention discloses a real-time realistic drawing method of a human heart. The method comprises the steps of effectively drawing the surface and sub-surface effects by the texture space sub-surface drawing method and the semitransparent transmission method; combining a concave-convex map and a Kelemen / Szirmay-Kalos lighting model, so as to achieve the effect the heart surface is covered with mucus; combining sub-frame scattering, mucus coverage and other foundation effect of the heart surface to obtain the heart surface drawing effect. The experiment result shows that the real-time realistic drawing method of the human heart is relatively high in drawing efficiency and realistic performance.

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 Applications(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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