Correlation1d with negative disparity

[MeLonJ10]

Hi,
Thanks you so much for the excellent work.
I am dealing with stereo images with negative disparity ( The stereo images were adapted from light field images, so their disparity would have negative value).
I'd like to ask you that how should I modify the code of correlation1d to handle images with negative disparity?
It would be greatly appreciate if you can kindly offer me any advice.
best,