基于Fourier-Mellin变换和曲面拟合的IC芯片图像亚像素配准算法  

IC Chip Image Sub-pixel Registration Algorithm Based on Fourier-Mellin Transform and Surface Fitting

作　　者：许少娟[1] 王演[2] 王鲁云[1] 张晶泊[2] XU Shaojuan WANG Yan WANG Luyun ZHANG Jingbo(City Institute, Dalian University of Technology, Dalian 116600,China School of Information Science and Technology, Dalian Maritime University, Dalian 116026 ,China)

机构地区：[1]大连理工大学城市学院,辽宁大连116600 [2]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《青岛科技大学学报（自然科学版）》2016年第5期573-579,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(61501078)

摘　　要：为实现IC芯片图像的精确配准,提出一种Fourier-Mellin变换和曲面拟合法结合的图像亚像素配准算法。算法首先采用Fourier-Mellin变换计算出待配准IC芯片图像的旋转角和平移量的整像素峰值位置,然后对峰值区域进行基于最小二乘的曲面拟合,通过取极值点获得亚像素级的精确峰值位置。另外,Fourier-Mellin变换由于旋转的频谱混叠和坐标变换中的重采样插值会产生误差,新算法采用加窗和滤波的方法加以改进。实验结果表明,所提算法实现了IC芯片图像的亚像素级配准,具有较好的精度和鲁棒性。To achieve IC chip image accurate registration,a new image sub-pixel registration algorithm which combines Fourier-Mellin transform and surface fitting method is proposed.The new algorithm first calculates the peak position of rotation angle and translation of the matched IC chip image via using Fourier-Mellin transform.Then,the peak area is fitted by using least squares method,and the accurate peak position which is a sub-pixel value is obtained through calculate extreme points.In addition,spectrum aliasing and resampling interpolation during coordinate transformation will bring errors by applying Fourier-Mellin transform.The proposed algorithm resolves this problem by adding window function and filtering.Simulation results show that the proposed algorithm accomplished IC chip image sub-pixel registration with optimal robust and accuracy.

关 键 词：图像配准 FOURIER-MELLIN变换 曲面拟合 亚像素 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]