体扫描显示系统中螺旋旋转屏及螺旋切片生成算法  

Helix rotation screen and the generation algorithm of helix slice in volumetric-swept display system

作　　者：岳键[1,2] 樊琼剑[1,3] 沈春林[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]南京信息工程大学计算机与软件学院,南京210044 [3]空军航空大学航空控制工程系,长春130022

出　　处：《中国图象图形学报》2011年第8期1466-1473,共8页Journal of Image and Graphics

基　　金：国家高技术发展研究计划(863)项目(2007AA01Z338);中国博士后科学基金项目(20080441051);江苏省博士后科学基金项目(0802014c)

摘　　要：为了改善平面旋转屏体扫描显示系统中存在的成像空间较小、体素数量较少和体素重叠死区严重等缺陷,系统采用螺旋旋转屏构建体3维显示系统的成像空间。根据螺旋屏旋转构成的成像空间的特点,提出了利用螺旋面的素线和3维模型的三角面片求交的算法生成螺旋切片。该算法根据螺旋旋转屏的不同旋转位置的角度信息,把3维模型离散成有序的螺旋切片序列。实验结果表明,螺旋旋转屏的性能优越以及所提出的算法方便有效。In order to meliorating defects, such as smaller image space and fewer voxels and severer voxel overlap dead zone caused by planar rotational screen in volumetric-swept display system, the system adopted helix rotation screen to construct an imaging space in volumetric-swept display system. Considering the characteristics of the imaging space, the generation algorithm for helix slices of the 3D model was proposed. It calculated the points of intersection crossed by simple- lines of the helicoids and triangular elements of 3D model and obtained the helix slices. This algorithm dispersed the 3D model into a set of consecutive helix slices according to the angle information of the rotational helix screen. The experimental results showed that the helix rotational screen performance was superior to plane rotational screen, and the proposed algorithm is convenient and effective.

关 键 词：真3维显示 体3维显示 体扫描 螺旋旋转屏 螺旋切片 

分 类 号：TN23[电子电信—物理电子学] TP237[自动化与计算机技术—检测技术与自动化装置]