一种投影几何失真校正的硬件架构设计  

A Hardware Architecture Design for Projector Geometric Distortion Correction

作　　者：任力飞[1] 谢翔[1] 李国林[2] 

机构地区：[1]清华大学微电子与纳电子学系,北京100084 [2]清华大学电子工程系,北京100084

出　　处：《微电子学与计算机》2015年第11期15-20,共6页Microelectronics & Computer

基　　金：国家自然科学基金(61373073)

摘　　要：针对投影式移动设备的投影图像几何失真问题,提出了一种基于图像变形算法的投影图像几何失真校正的硬件架构,并针对硬件实时性及功耗问题提出了解决方法.本架构设计了基于奇偶存储机制的双行缓存,实现了片外插值像素的并行获取,降低读取延时;基于数据复用原理设计了冗余消除单元,有效避免片外像素的重复读取及功耗,读取次数平均减少61.5%,减小读取功耗;存储空间消耗仅为11.9kB.本设计还引用了无除法的中点算法进行坐标的透视变换,并设计了坐标变换查找表,实现了像素的低复杂度片外和行缓存寻址.A hardware architecture is proposed to correct the projector geometric distortion for projective mobile devices.A double-line buffer is designed based on odd-even storage mechanism to realize parallel access of off-chip pixels.A redundancy elimination unit is designed based on data reuse to effectively avoid repetitive access of off-chip pixels,and the access is reduced by average 61.5%.The occupied storage size is only 11.9kB.Furthermore,the division-free midpoint algorithm is adopted,combined with coordinates LUT,to realize low complexity off-chip and buffer addressing.

关 键 词：投影几何失真校正 图像变形算法 硬件架构 缓存设计 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]