required of a matched pair this can happen if a pair of interest points is matched in error and subsequent matches expose this for example by being inconsistent with the pair of interest points matched in error in such a case the erroneously matched pair of interest points can be unmatched determining whether the value of the element of the first array that is in the row corresponding to a matched interest point and the column corresponding to the interest point with which it is matched represents a number of matched pairs of objects below a predetermined threshold and adjusting the element of the second array that is in the row and column corresponding to the interest points of the matched pair whose match is to be rescinded so as to decrease the confidence it represents and adjusting every other element of the second array that is in the row corresponding to the interest point of the matched pair in the first dataset or the column corresponding to the interest point of the matched pair in the second dataset and not in a row corresponding to the interest point of any other matched pair in the first dataset or the column corresponding to the interest point of any other matched pair in the second dataset so as to increase the confidence it represents as the reader will understand adjusting the element of the second array that is in the row and column corresponding to the interest points of the matched pair whose match is to be rescinded may comprise restoring it to its.