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Direct volume rendering with shading

A volume rendering, direct technology, applied in the field of data processing, which can solve problems such as image blur, achieve the effect of improving feeling, increasing display speed, and reducing complexity

Inactive Publication Date: 2007-08-01
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, noise in homogeneous regions can cause undesired interference patterns that can lead to blurring of the image

Method used

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  • Direct volume rendering with shading
  • Direct volume rendering with shading
  • Direct volume rendering with shading

Examples

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Embodiment Construction

[0020] The invention will be explained in the context of medical images, however this should not limit the scope of the invention to medical applications. The invention clearly includes any type of application using the features of the invention, even in remote technical areas where 3D arrays of data are used. For example, the invention would be of benefit to other fields such as video games, meteorology and aviation.

[0021] Figures 1 and 2 represent visualizations of the internal bony structure of the human hand. Both displays show finger bones and hand tissue shown as dark homogeneous regions. Homogeneous regions are thus referred to in contrast to regions of body structure variation, such as bone surface boundaries. Both images are based on the same raw data set, for example obtained from X-ray radiation of a human hand, but this raw data set has been processed in two different ways and thus appears to differ in quality. When the data processing algorithm of the prior ...

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Abstract

The present invention relates to direct volume rendering based on a light model applied to a 3D array of information data samples. Gradients are first estimated for the individuals samples, and a simple shading is done on the samples with low gradient, i.e. homogenous area.

Description

technical field [0001] The present invention relates to data processing. In particular the invention relates to direct volume rendering and visualization of 3D images in the medical field. Background technique [0002] Direct Volume Rendering (DVR) is a straightforward method of obtaining 2D images of 3D datasets. There are other techniques for generating 2D images, such as maximum intensity projection, layering, and isosurface visualization, etc., but these known techniques are limited to only certain 3D data values ​​contributing to the final 2D result. In direct volume rendering, all datasets have the potential to contribute to the 2D output image. Direct volume rendering thus projects the volume into the display window, and although there may be ambiguity in the depth of some visible areas, the interactivity allows the user to manipulate the viewpoint and perspective and get a good sense of the observed object and its volume. Whereas other image processing algorithms ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/40G06T15/06
CPCG06T15/06G06T15/40
Inventor J·韦塞G·基弗M·布什H·莱曼
Owner KONINK PHILIPS ELECTRONICS NV
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