c++ LSD 直线检测

代码说明：

完整的c++ LSD代码， 可以用于直线检测LSD is an implementation of the Line Segment Detector on digitalimages described in the paper:  "LSD: A Fast Line Segment Detector with a False Detection Control"  by Rafael Grompone von Gioi, Jeremie Jakubowicz, Jean-Michel Morel,  and Gregory Randall, IEEE Transactions on Pattern Analysis and  Machine Intelligence, vol. 32, no. 4, pp. 722-732, April, 2010.and in more details in the CMLA Technical Report:  "LSD: A Line Segment Detector, Technical Report",  by Rafael Grompone von Gioi, Jeremie Jakubowicz, Jean-Michel Morel,  Gregory Randall, CMLA, ENS Cachan, 2010.The version implemented here includes some further improvements asdescribed in the IPOL article of which this file is part:  "LSD: a Line Segment Detector" by Rafael Grompone von Gioi,  Jeremie Jakubowicz, Jean-Mic