Patent ID: 6738063
Filing Date: 2004-05-18
Classification: G06T

Abstract:
A method for object correspondence identification between two image sets, comprising:receiving a selected point in said one image set; locating a rough matching point in said another image; defining a first volume-of-interest around said selected point; defining a search window around said matching point comprising a plurality of neighboring points; for every point in said search window, defining a second volume-of-interest; computing the similarity/dissimilarity between each said second volume-of-interest with said first volume-of-interest by applying a grayscale cross correlation computation according to the equation S&af;(VA,VB)=&Sum;(VA&af;(x,y,z)-V_A)&it;(VB&af;(x,y,z)-V_B)&Sum;(VA&af;(x,y,z)-V_A)2&it;&Sum;(VB&af;(x,y,z)-V_B)2â€ƒwhere {overscore (V)}A and {overscore (V)}B are the mean of the grayscale values of all pixels in said two volumes-of-interest and the summations are over all the voxels in both said volumes-of-interest; and selecting that second volume-of-interest that is most similar to said first volume-of-interest.