Light irradiation analogy method of real time three-dimensional image based on pattern processor

Abstract

The invention provides a real-time three-dimensional image illumination simulation method based on graphics processing units. The method orderly comprises the following steps that: (1) to-be-processed texture in three-dimensional image data is saved in a graphics processing unit; (2) the graphics processing unit calculates the illumination amount of texture data points according to an illumination model arranged in the graphics processing unit; and (3) the graphics processing unit mixes the illumination amount of the texture data points with a data value. The calculation for the illumination amount of the three-dimensional image data has brightness calculation as well. The illumination simulation method can allow an image displayed on a screen to vividly simulate the illumination effect in the nature, and furthermore, the calculation for the illumination amount of each data point also has the brightness calculation, thereby ensuring that the image displayed on the screen has a concave-convex effect, so as to increase the reality effect of the image further. Because of the high-speed parallel mechanism of the graphics processing unit, the operation time needed by the illumination simulation calculation is little, which meets the requirement of the three-dimensional images on real-time display.

Description

technical field [0001] The invention relates to image data processing, in particular to a lighting simulation method for a real-time three-dimensional image based on a graphics processor. Background technique [0002] The main purpose of 3D visualization is to use computer graphics technology to construct a 3D model of an organ from a series of 2D slices obtained by medical imaging equipment (this series of 2D slices constitute volume image data), and it is very realistic. is displayed to the viewer, so that the viewer can visually observe the volumetric image data (that is, the three-dimensional image data). [0003] In order to make the image displayed on the screen simulate the lighting effect of nature, in the reconstruction process of the 3D image, the lighting model should be constructed to calculate the amount of light for each data point of the volumetric image data, and mix the light amount into the data points. Data value, so that the final image displayed on the ...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current lighting models are fixed-function lighting models set in the central processing unit (CPU). The amount of calculation is very small, but they only work well for some very limited materials (such as rubber), and for some complex materials. Tissues (such as fetuses, hearts, etc.) are not realistic enough, and the images displayed on the screen cannot realistically simulate the lighting effects of nature

Images