象素格点上深度图象的空间仿射变换  

SPACE AFFINE TRANSFORMATION OF A DEPTH IMAGE AT PIXEL POINTS

作　　者：龚向东[1] 

机构地区：[1]江西大学物理系,南昌330047

出　　处：《机器人》1992年第2期26-40,共15页Robot

摘　　要：一般仿射变换涉及3维空间的平移、缩放和旋转操作.对于栅点上抽样所获的深度图,这类变换往往产生一个严重畸变的图象格栅.本文引入一种基于交点追踪的重新抽样方法,可以提供变换后所需规则栅点上精确的距离信息.文中最后给出了牙齿模型深度图实施所述变换的几个例子.A general affine transformation involves translation,scaling and rotation operations in three dimensionalspace.For a depth image obtained by sampling at grid points,the mapping generates a grid that is usuallystrongly deformed.We introduce a re-sampling method based on intersecting—point—finding that pro-vides exact range data at desired regular grid points.Finally we give several examples of the mapping to adepth image of a tooth model.

关 键 词：仿射变换 深度图 计算机绘图 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]