| 利用DEM边缘检测进行黄土地貌沟沿线自动提取 |
| |
| 引用本文： | 晏实江,汤国安,李发源,董有福.利用DEM边缘检测进行黄土地貌沟沿线自动提取[J].武汉大学学报(信息科学版),2011(3):363-367. |
| |
| 作者姓名： | 晏实江 汤国安 李发源 董有福 |
| |
| 作者单位： | 南京师范大学虚拟地理环境教育部重点实验室; |
| |
| 基金项目： | 国家自然科学基金资助项目(40930531,40801148); 南京师范大学研究生优秀学位论文培育计划资助项目(2010bs0037); 江苏省普通高校研究生科研创新计划资助项目(CX10B_390Z) |
| |
| 摘 要： | 在分析黄土地貌沟沿线形态特征的基础上,提出了基于规则格网DEM,通过引入边缘检测算子提取并连接沟沿线候选点,并借助形态学方法滤除细碎线段,最终生成沟沿线的方法。黄土丘陵沟壑区的实验结果显示,Sobel、Roberts、Prewitt梯度算子检测得到的沟沿线封闭性较差,线段较零碎,与实际沟沿线不符,不适用于沟沿线的自动提取;而LOG算子提取的线段连续、精度高,是理想的沟沿线检测算子,能够实现黄土地貌沟沿线较准确、有效的自动提取。
|
| 关 键 词： | 边缘检测 数字高程模型 沟沿线 |
An Edge Detection Based Method for Extraction of Loess Shoulder-Line from Grid DEM |
| |
| YAN Shijiang TANG Guoan LI Fayuan DONG Youfu.An Edge Detection Based Method for Extraction of Loess Shoulder-Line from Grid DEM[J].Geomatics and Information Science of Wuhan University,2011(3):363-367. |
| |
| Authors: | YAN Shijiang TANG Guoan LI Fayuan DONG Youfu |
| |
| Affiliation: | YAN Shijiang1 TANG Guoan1 LI Fayuan1 DONG Youfu1 (1 Key Laboratory of Virtual Geographic Environment,Ministry of Education,Nanjing Normal University,1 Wenyuan Road,Nanjing 210046,China) |
| |
| Abstract: | We propose a new method for extracting loess shoulder-lines from grid DEM.The morphological characteristics of loess shoulder-lines are investigated firstly.By applying the edge detection approach,a new method for extracting loess shoulder-line candidate points is proposed based on the prominent height variation of the points.The algorithm then connects the candidate points to small line segments by morphological methods.Finally,precise,systematic loess shoulder-lines are extracted after refining the line s... |
| |
| Keywords: | edge detection DEM loess shoulder-line |
| 本文献已被 CNKI 等数据库收录！ |
|
