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基于7方向Box样条的等值面可视化 被引量：1

Iso-surface Visualization Based on the Seven-directional Box Spline
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摘要 传统的基于光线投射算法的体数据等值面可视化方法采用三线性插值用于求交计算,误差较大。提出一种基于7方向Box样条的等值面可视化算法,改进插值和梯度计算的精度,采用多种体数据属性值和梯度幅值相结合的颜色映射传输函数。由于7方向Box样条具有C2连续性,体数据标量值、梯度和曲率的计算都是精确的,算法可实现高精度的等值面可视化效果。 The traditional method of volumetric data iso-surface visualization based on ray casting using tri-linear interpolation for intersection calculation.This method produces large error.This paper adopts a method based on the seven-directional box spline to implement iso-surface visualization in order to improve the interpolation and gradient calculation accuracy.It uses color mapping transfer function with the combination of a variety of volumetric data attribute value and gradient magnitude.Because it＇s C2 continuous, the scalar value,gradient and curvature calculation of the volumetric data is accurate,and it can achieve high precision level visualization effect.
作者 刘晓 方美娥 张楠
机构地区 杭州电子科技大学计算机学院
出处 《杭州电子科技大学学报（自然科学版）》 2015年第5期63-67,共5页 Journal of Hangzhou Dianzi University：Natural Sciences
基金 国家自然科学基金资助项目(61272032) 浙江省自然科学基金资助项目(LY12F02002)
关键词 等值面 可视化 7方向Box样条 光线投射 曲率 iso-surface visualization seven-directional box spline ray casting curvature
分类号 TP391.1 [自动化与计算机技术—计算机应用技术]
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参考文献6

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二级参考文献34

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杭州电子科技大学学报（自然科学版）
2015年 第5期

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