工业CT数据场面绘制和体绘制改进算法研究  

Research for improved surface rendering and volume rendering algorithms based on ICT data field

作　　者：侯慧玲[1] 王明泉[1] 任少卿[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《计算机工程与应用》2014年第23期172-175,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61171177);山西省青年基金(No.2009021019-2)

摘　　要：工业CT图像的重建速度和精度是工业CT产品的两个重要指标。针对面绘制的MC算法提出了一种基于相似性区域分割的三维工业图像表面重建算法,实现了准确分割,并利用分割结果精确地提取等值面,显著提高了检测效率;针对体绘制的光线投射算法提出了一种基于二维最大熵阈值的分割预处理方法,利用二维直方图熵最大化寻找阈值的最佳组合,能有效减少重建体数据量,实测数据表明体绘制速度明显提高。Reconstruction speed and accuracy are two important indicators of industrial CT products. According to the MC surface rendering algorithm, an improved algorithm is proposed based on the comparability region segmentation. The accurate segmentation result is used as the input of MC to generate equivalence surfaces. The detection efficiency can be improved significantly. According to ray casting algorithm, an 2D maximum entropy threshold segmentation preprocessing is proposed. The 2D histogram entropy maximization is used to define the extent of threshold, and research the optimal combination of the parameters. The results of reconstruction show that the improved algorithm can greatly reduce recon-struction volume data and improve the efficiency of ray casting.

关 键 词：工业CT 面绘制 体绘制 MC算法 光线投射算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]