基于兴趣点检测和仿射变换模型的序列图像拼接.pdfVIP

39 3 Vol. 39, No. 3 2009 3 LASER INFRARED M arch, 2009 : 2009) 图像与信号处理 倪维平, 边 辉, 严卫东 (, 71002 ) : 针对序列图像的拼接问题, 提出了一种基于 趣点检测和仿射变换模型的图像配准算 法, 利用H arris算子检测 趣点, 并引入灰度交叉匹配和 趣点坐标离散度两级约束策略确定 同名 趣点, 通过在图像间建立仿射变换模型实现图像的配准; 提出了一种自适应加权归一化 函数对拼接图像进行处理, 消除由于图像间灰度差异而导致的拼接缝实验结果表明算法具 有较高的配准精度和良好的像素融合效果 : 序列图像拼接; 趣点检测; 仿射变换模型; 图像配准; 自适应加权归一化函数 : T751. 1 : A Sequential Im agesM osaic Based on Interestpoint D etection and A ffine Transform M odel N IW eip ing, BIAN Hui, YAN W eidong ( Northw est Institute ofNuclear Technology, X i an 71002 , China) A b stract: For the problem of the sequential mi agem osaic, a new m ethod for mi age registration based on the interest point detection and affine transform m odel is proposed firstly, wh ich detects interestpoints by theH arris operator, and introduces a wt olevel restricted tactic based on cross m atch and coord inate scattering to gain the hom onym y points. Then mi age registration is carried out accord ing to the affine transform m odel. A norm alized adaptivew eighted function is given for elmi inating the mosaicsew caused by the d ifference of the p ixel gray in the mi ages, wh ich m akes the smooth ly transition of them osaic mi age. The expermi ent resu lts ind icate that approach proposed has good registration precision and n ice effect of pixelfusion. K ey w ord s: sequential mi age mosaic; interestpoint detection; affine transform m odel; mi age registration; norm alized a daptive w eigh ted function 1 [ 1- ]