摘要
针对光线投射体绘制算法存在的运算量大,绘制速度慢的问题,提出了光线投射体绘制过程中对工业CT断层图像原始数据场进行二维最大熵阈值分割预处理的改进,利用二维直方图熵最大化确定阈值的范围,寻找参数的最优组合,结合阈值面积消除法滤除一些噪声将图像二值化,减少重建体数据量,加速光线投射的效率。取得了较好的显示效果。
Aim to the problems of powerful computing capacity and slow rendering velocity, a improved algorithm of ICT slice images original data field 2D maximum entropy threshold segmentation prior preprocessing in the course of ray casting volume rendering is proposed. The 2D maximum entropy threshold method is used to define the extent of threshold, and research the optimal combination of the parameters. Then, the area threshold removing method is applied to filter the noise. Binary processing of image is done. This algorithm reduced reconstruction volume data and greatly improves the efficiency of ray casting. The result of reconstruction is satisfactory.
出处
《电子器件》
CAS
2008年第3期923-925,930,共4页
Chinese Journal of Electron Devices
基金
山西省科技攻关项目资助(2006031160)
中国博士后科学基金资助项目(2005038095)
关键词
体绘制
光线投射算法
最大熵
阈值
工业CT
volume rendering
ray casting algorithm
maximum entropy
threshold
ICT
