Graphics processing unit (GPU) based accelerated dynamic sectioning method of volume data

A volumetric and dynamic technology, applied in image data processing, 3D image processing, instruments, etc., to achieve the effect of accelerating processing speed, improving display effect, and real-time and fast cutting process

Inactive Publication Date: 2013-01-09
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

If you don't solve this problem from a hardware perspective, you can only choose between sacrificing speed or display quality

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  • Graphics processing unit (GPU) based accelerated dynamic sectioning method of volume data

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Embodiment Construction

[0026] The method of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] A method for dynamic sectioning of volume data based on GPU acceleration comprises the following steps:

[0028] (1) Reading and processing of data. First read the data, and then preprocess the volume data. Data preprocessing is the process of taking the average value at a certain interval and thinning the data.

[0029] (2) Map the attribute values ​​of volume data into color values. Through the mapping relationship, such as c=ρ(x), the attribute value of the data is mapped to the corresponding color value.

[0030] (3) Load data. The first is to determine the data block to be loaded, and determine the data block to be loaded and the resolution of the data block according to the distance between the viewpoint and the model; after the determination, it is necessary to remove invisible blocks.

[0031] (4) Load volume data into texture memory. ...

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Abstract

The invention discloses a graphics processing unit (GPU) based accelerated dynamic sectioning method of volume data. The volume data is drawn based on volume texture acceleratively, the direct volume drawing of the three-dimensional volume data is carried out by a three-dimensional texture mapping function realized by hardware, an interpolation operation which can realize resmapling in a texture space and an image synthesis with an opacity value and the like are completed by the hardware. The accelerated drawing method utilizes the three-dimensional texture hardware, i.e., by means of the texture mapping function, a sectioned three-dimensional graphics effect is dynamically displayed by dynamically modifying a texture coordinate of a texture geometry and carrying out real-time calculation. The three-dimensional volume data is sectioned in real time by the GPU based accelerated volume texture drawing method, so that the sectioning of the three-dimensional volume data achieves a real-time dynamic display effect.

Description

technical field [0001] The invention relates to a real-time sectioning method of volume data, in particular to a dynamic sectioning method based on GPU acceleration, which belongs to the field of sectioning and visualization of volume data. Background technique [0002] With the upgrading of current hardware equipment, especially the rapid improvement of computer graphics hardware performance, using high-performance graphics equipment for interaction makes it possible to visualize high-quality 3D volume data. Although 3D visualization technology has penetrated into all walks of life, it has been applied to varying degrees in many fields such as medicine, geology, meteorology, space physics, chemistry, photomicrography, computational fluid dynamics and finite element analysis. However, volume visualization technology is still facing many problems, the most important of which is that the display speed of volume data is slow and real-time dynamic display cannot be performed. B...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06T15/08G06T15/04
Inventor刘修国郑坤花卫华张柱冉秀桃
OwnerCHINA UNIV OF GEOSCIENCES (WUHAN)