%0 Journal Article
%T High resolution DEM topographic feature line extraction algorithm using GPU<br>GPU加速的高分辨率DEM图像地形特征线提取算法
%A Liu Zhoujun
%A Hu Baogang
%A <br>刘洲俊
%A 胡包钢
%J 中国图象图形学报
%D 2012
%I 
%X High resolution digital elevation models (DEM) used in digital terrain analysis are becoming more and more prevalent. There are various curvilinear structure extracting algorithms, but the main limitation of them is the high computing cost, making them less efficient when extracting topographic feature lines from high resolution DEM images. We propose an efficient strategy to speed them up using Steger's curvilinear structure detection algorithm imple mented on graphic processing units (GPU). We choose to speed up the most computation intensive modules of the algorithm (Hessian matrix generation and feature point detection) using NVIDIA's compute unified device architecture (CUDA). This method can achieve more than five times speedup compared with the original algorithm on central process units (CPU) for large scale DEM images with millions of pixels.
%K digital elevation model
%K topographic feature line detection
%K graphic processing unit
%K compute unified device architecture<br>数字高程模型
%K 地形特征线检测
%K 图形处理器
%K 计算统一设备架构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=C3C9E433FF4C68C488646AAD58968A07&yid=99E9153A83D4CB11&vid=BCA2697F357F2001&iid=0B39A22176CE99FB&sid=D537C66B6404FE57&eid=627456E7977439A4&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=16