KCF算法的Multi-scale c++版本运行

KCF算法的Multi-scale c++版本如何运行?在ubuntu14.04下，提示：KCF: /home/KCFcpp/src/kcftracker.cpp:164: virtual void KCFTracker::init(const Rect&, cv::Mat): Assertion `roi.width >= 0 && roi.height >= 0' failed.

http://blog.csdn.net/hjl240/article/details/52002749