| 摘要 |
A method for registering first and second digital images of first and second separation patterns, respectively, where the digital images are described by gray level functions ƒ1 and ƒ2 defined on a pixel set. In accordance with the method, the pixel set is divided into m regions R1,...,Rk,...Rm.For each region Rk, a sequence of nk transformations <i>Sk</i>1 <i>Sk,j</i>,...<i>Sk,nk</i>, mapping Rk into the pixel set is selected. A similarity score is then calculated for each of the nk regions Sk,j(Rk) for j=1,...nk, where the similarity score scores the similarity of the appearance of Rk in the first digital image and the appearance Sk,j(Rk) in the second digital image. A transformation Sk is then selected from among the <i>Sk,1</i>,...,<i>Sk,j</i>,...<i>Sk,nk</i> for which the similarity score, Sk(Rk) is maximal among the similarity scores of the Sk,j(Rk) for j=1,...nk. A pixel pk in Rk is then selected. A global transformation T mapping the pixel set into the pixel set is defined based upon at least some of the Sk(pk), and the image of the second image under T<-1>, is obtained to produce a modified second image |
