METHOD FOR DETERMINING A SIMILARITY VALUE BETWEEN A FIRST IMAGE AND A SECOND IMAGE

摘要

A method for determining a similarity value between a first image and a second image, comprises the steps of providing a first plurality of point pairs, wherein each pair of the first plurality of point pairs has two image points in the first image, determining, for each pair of the first plurality of point pairs, a sign parameter and a weight associated with the respective pair of the first plurality of point pairs according to image intensities of the two image points of the respective pair of the first plurality of point pairs, providing a second plurality of point pairs, wherein each pair of the second plurality of point pairs has two image points in the second image and is corresponding to one of the point pairs of the first plurality of point pairs, determining, for each pair of the second plurality of point pairs, a sign parameter associated with the respective pair of the second plurality of point pairs according to image intensities of the two image points of the respective pair of the second plurality of point pairs, determining a score parameter according to weights associated with at least part of the first plurality of point pairs, wherein only point pairs are considered which have the same sign parameter as the respective corresponding pair of the second plurality of point pairs, determining a normalization parameter according to weights associated with the first plurality of point pairs or a part of the first plurality of point pairs, and determining a similarity value according to the score parameter and the normalization parameter.

主权项

1. A method for determining a similarity value between a first image and a second image, comprising
obtaining a first plurality of point pairs, wherein each pair of the first plurality of point pairs comprises two image points in a first image; determining, for each pair of the first plurality of point pairs, a sign parameter and a weight according to image intensities of the two image points of the respective pair. obtaining a second plurality of point pairs, wherein each pair of the second plurality of point pairs comprises two image points in a second image and corresponds to one of the point pairs of the first plurality of point pairs; determining, for each pair of the second plurality of point pairs, a sign parameter according to image intensities of the two image points of the respective pair; assigning weights to point pairs of the first plurality of point pairs which have the same sign parameter as the respective corresponding pair of the second plurality of point pairs; determining a normalization parameter according to weights associated with at least part of the first plurality of point pairs; and determining a similarity value for the first image and the second image based on assigned weights and the normalization parameter.