There are few parameters (non-linear filter parameters, vote weight, region threshold) which need to be adjusted for your image resolution.
Do not forget to cite:
B. Sirmacek and C. Unsalan, "A probabilistic framework to detect buildings in aerial and satellite images", IEEE Transactions on Geoscience and Remote Sensing, Vol. 49 (1), pp. 211-221, January 2011.
Create scripts with code, output, and formatted text in a single executable document.