一种三维医学图像切割算法  

An Algorithm of 3D Medical Image Cutting

作　　者：张谦[1] 吴国华[1] 潘志庚[1] 

机构地区：[1]杭州电子工业学院虚拟现实与多媒体实验室,浙江杭州310018

出　　处：《杭州电子工业学院学报》2003年第6期50-52,共3页Journal of Hangzhou Institute of Electronic Engineering

摘　　要：采用一般的直接体绘制算法进行三维图像切割操作不能很好地满足实时交互的要求。提出一种基于剪切-弯曲方法的切割算法。该算法首先在中间图像平面上合成出被去除物体的掩码,并与变换到该平面上的切割面纹理图像一起,选择重采样那些在纹理图像以外的变化了的象素,最后采用弯曲变换产生最终三维图像。采用该方法可以减少对三维物体图像象素的合成计算,从而提高绘制速度。实验表明,该算法可以实时显示切割效果,且图像质量无明显变化。Because current general 3D image cutting methods, which use direct volume rendering algorithm, cannot meet the requirement of real-time cutting, a new method based on shear-warp algorithm is put forward. This method first generates a 3D image mask on the intermediate image space. Then, together with the texture mapped onto the cutting surface, the mask is used to resample those changed pixels outside the texture. At last, an eventual 3D image is formed using Shear-Warp algorithm. it The experimental result shows,can decrease the computing of resampling and increase the speed of rendering. and this method can meet the effect of real-time cutting and there is no obvious difference in image quality.

关 键 词：三维医学图像 剪切-弯曲 切割 图像掩码 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]