A robust correlation measure for correspondence estimation

A median correlation for the estimation of corresponding points in stereovision is proposed. It is based on the normalised correlation coefficient using the median instead of the mean. Its performance appears to be superior than conventional correlation specially in depth discontinuities image areas. This conclusion is derived from an empirical evaluation in which the proposed correlation is compared with the normalised correlation coefficient and the sum of absolute difference. The results show that the median correlation produces higher scores and lower estimation errors.