1. A method of making a correlation between a first image and a second image in an image processing algorithm, comprising: computing a first correlation using image data associated with the first image as a template and using image data associated with the second image as a search area; determining a first correlation peak from the first correlation, the first correlation peak representing an image disparity from the first image to the second image; computing a second correlation using image data associated the second image as a template and using image data associated with the first image as a search area; determining a second correlation peak from the second correlation, the second correlation peak representing an image disparity from the second image to the first image; and validating the first correlation peak by comparing the second correlation peak to a threshold value, the threshold value based upon the first correlation peak.