基于定向二维插值逆投影变换方法.PDF

ISSN 1000-0054 ( ) 2006 46 5 26/ 35 CN 11-2223/ N J T singhua Un iv ( Sci Tech) , 2006, V l. 46, N . 5 712-715 基于定向二维插值的逆投影变换方法 郭　磊, 　李克强, 　马　莹, 　王建强, 　连小珉 ( , , 100084) : 为了研究逆投影变换方法在智能车驾驶环境信息 1　逆投影变换的反向求解 采集中的应用, 提出了 一种 向求解逆投影的方法, 即根据 用户感兴趣的道路区域规划逆投影变换后的图像, 并考虑了 1 车道线的方向特性, 提出分段的定向二维插值方法求解逆投 影变换后图像各 个像素点的灰度值。理论分析和标定试验表 明, 使用该方法进行逆投影变换后的图像能够较好地 映客 观路面情况, 并且可以降低逆投影变换的计算量, 强化车道 线信息。 : 汽车; 机器视觉; 逆投影变换; 定向二维插值 : U 27 : A : 1000-0054( 2006) 05-07 12-04 Inverse perspective transform based on directional 2-D interpolation GUO Lei, LI Keqiang, MA Ying, WANG Jia nq iang , LIAN Xiaomin ( State Key L aboratory of Automotive Saf ety and Energy, Department of Automotive Engi neeri ng, Ts inghua Uni versi ty, Bei ing 100084, Chi na) Abstract: A r ever se inverse perspective transf rm ( IPT ) meth d w as devel ped t analyze envir nmental inf rmati n c llected by intelligent vehicles . Th e image after the transf rm can be arranged 1 acc rding t th e users w ishes. Directi nal 2-D interp lati n in vari u s subsecti ns w as used t calculate the pix el gray values t 1 , , a A B U A BCD an alyze th e directi nal characteristics f th e lan e m arkers . T he retical analyses and calibrati n tests sh w that w ith the , O directi nal 2-D interp lati n based IPT , the im age accurately , OG , G represents the r ad envir nm ent w ith much few er calculati ns and impr ved lane m ark er identificati n. , I O , , I Key words: aut m bile; machine visi n; inverse perspective transf rm; directi nal 2