题目/Title：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/Author：任力飞,谢翔,李国林
                        Lifei Ren,Xiang Xie,Guolin Li

期刊/Journal：微电子学与计算机 Microelectronics & Computer

年份/Issue Date：2015

卷（期）及页码/Volume（No.）&pages：Vol.32, No.11, pp. 15-20

摘要/Abstract：
针对投影式移动设备的投影图像几何失真问题，本文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.