  This is a revised version of our paper published in Journal of Convergence
Information Technology(JCIT): "Comparison of Feature Point Extraction
Algorithms for Vision Based Autonomous Aerial Refueling". We corrected some
errors including measurement unit errors, spelling errors and so on. Since the
published papers in JCIT are not allowed to be modified, we submit the revised
version to arXiv.org to make the paper more rigorous and not to confuse other
researchers.
