CAJ | 학술논문

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。
공업CT도상적중건속도화정도시공업CT산품적량개중요지표。침대면회제적MC산법제출료일충기우상사성구역분할적삼유공업도상표면중건산법，실현료준학분할，병이용분할결과정학지제취등치면，현저제고료검측효솔；침대체회제적광선투사산법제출료일충기우이유최대적역치적분할예처리방법，이용이유직방도적최대화심조역치적최가조합，능유효감소중건체수거량，실측수거표명체회제속도명현제고。
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.