勤维烈,又译勒威耶(Urbain Le Verrier,1811—1877)是法国天文学家。1811年3月11日,勒维烈生于法国西北部诺曼蒂省的圣诺镇的一个小职员家庭。父亲收入微薄,他十九岁时,靠父亲卖掉房屋和奖学金的资助,才得以进入巴黎大学学习。勒维烈对...勤维烈,又译勒威耶(Urbain Le Verrier,1811—1877)是法国天文学家。1811年3月11日,勒维烈生于法国西北部诺曼蒂省的圣诺镇的一个小职员家庭。父亲收入微薄,他十九岁时,靠父亲卖掉房屋和奖学金的资助,才得以进入巴黎大学学习。勒维烈对数学具有浓厚兴趣。毕业后,他在某化学实验室工作,利用业余时间进行天文学的研究,后来当上了天文学助教。他对太阳系的诸行星的轨道变化逐个进行计算和分析,二十八岁时。展开更多
For calibrating the laser plane to implement 3D shape measurement, an algorithm for extracting the laser stripe with sub-pixel accuracy is proposed. The proposed algorithm mainly consists of two stages： two-side edge...For calibrating the laser plane to implement 3D shape measurement, an algorithm for extracting the laser stripe with sub-pixel accuracy is proposed. The proposed algorithm mainly consists of two stages： two-side edge detection and center line extraction. First, the two-side edge of laser stripe is detected using the principal component angle-based progressive probabilistic Hough transform and its width is calculated through the distance between these two edges. Secondly, the center line of laser strip is extracted with 2D Taylor expansion at a sub-pixel level and the laser plane is calibrated with the 3D reconstructed coordinates from the extracted 2D sub-pixel ones. Experimental results demonstrate that the proposed method can not only extract the laser stripe at a high speed, nearly average 78 ms/frame, but also calibrate the coplanar laser stripes at a low error, limited to 0.3 mm. The proposed algorithm can satisfy the system requirement of two-side edge detection and center line extraction, and rapid speed, high precision, as well as strong anti-jamming.展开更多
文摘勤维烈,又译勒威耶(Urbain Le Verrier,1811—1877)是法国天文学家。1811年3月11日,勒维烈生于法国西北部诺曼蒂省的圣诺镇的一个小职员家庭。父亲收入微薄,他十九岁时,靠父亲卖掉房屋和奖学金的资助,才得以进入巴黎大学学习。勒维烈对数学具有浓厚兴趣。毕业后,他在某化学实验室工作,利用业余时间进行天文学的研究,后来当上了天文学助教。他对太阳系的诸行星的轨道变化逐个进行计算和分析,二十八岁时。
基金Supported by the National Natural Science Foundation of China(11301461)the Natural Science Foundation of Jiangsu Province(BK20130435)the College Natural Science Foundation of Jiangsu Province(13KJB110031)
基金The National Natural Science Foundation of China(No.50805023)the Science and Technology Support Program of Jiangsu Province(No.BE2008081)+1 种基金the Research and Innovation Project for College Graduates of Jiangsu Province(No.CXZZ13_0086)Scientific Research Foundation of Graduate School of Southeast University(No.YBJJ1401)
文摘For calibrating the laser plane to implement 3D shape measurement, an algorithm for extracting the laser stripe with sub-pixel accuracy is proposed. The proposed algorithm mainly consists of two stages： two-side edge detection and center line extraction. First, the two-side edge of laser stripe is detected using the principal component angle-based progressive probabilistic Hough transform and its width is calculated through the distance between these two edges. Secondly, the center line of laser strip is extracted with 2D Taylor expansion at a sub-pixel level and the laser plane is calibrated with the 3D reconstructed coordinates from the extracted 2D sub-pixel ones. Experimental results demonstrate that the proposed method can not only extract the laser stripe at a high speed, nearly average 78 ms/frame, but also calibrate the coplanar laser stripes at a low error, limited to 0.3 mm. The proposed algorithm can satisfy the system requirement of two-side edge detection and center line extraction, and rapid speed, high precision, as well as strong anti-jamming.
