基于PC機(jī)的斷層圖象序列3-D表面重建
PC-BASED 3-D RECONSTRUCTION FROM CROSS-SECTIONAL IMAGES
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摘要: 由斷層圖象序列重建三維物體模型及其可見表面顯示是目前國(guó)際上十分活躍的研究課題。本文對(duì)X射線CT圖象序列重建三維對(duì)象模型,以及可見表面3-D顯示進(jìn)行了研究。提出一種給定分段點(diǎn)數(shù)的輪廓多邊形近似方法,繼而提出一種快速斷面圖象間輪廊插值方法。對(duì)重建出的人體肝臟體元陣列,用深度和梯度明暗顯示方法進(jìn)行顯示,肝臟可見表面的3-D顯示結(jié)果令人滿意。全部軟件都是在以PC/AT為主機(jī),配以PC-VISION圖象處理板的微機(jī)圖象處理系統(tǒng)上,用C語(yǔ)言編程實(shí)現(xiàn)的。
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關(guān)鍵詞:
- 三維重建; 斷層圖象; 三維顯示
Abstract: It is an active researching area to reconstruct the model of 3-dimensional object from cross-sectional images and to display its visible surfaces. In this paper, the theory and the method of reconstructing the model of 3-D object and displaving its visible surface from X-CT imaqes are studied. Giving the number of segment points, a polygonal approximation method is presented. Then a fast contour interpolating method is introduced. The reconstructed liver voxel set is displayed with the depth-only shading method and the depth gradient shading method, the result is satisfactory. The software is written in C language and runs on PC-VISION image processing system. -
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