| 一种基于数学形态学的沟壑密度提取算法 |
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| 引用本文： | 韦中亚,周贵云,罗万勤.一种基于数学形态学的沟壑密度提取算法[J].地理与地理信息科学,2001,17(2):24-27. |
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| 作者姓名： | 韦中亚 周贵云 罗万勤 |
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| 作者单位： | 1. 北京大学城市与环境学系,
2. 黄河上中游管理局, |
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| 基金项目： | 国家自然科学基金!项目 (批准号 :40 0 710 6 4)，水利部水土保持基金!项目支持 (2 0 0 0 - 0 2 - 0 1) |
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| 摘 要： | 沟壑密度是反映地表破碎程度的重要因子 ,在土壤侵蚀、地貌演变等研究中有重要作用。本文介绍基于数学形态学的沟壑密度提取算法 ,从TM影像中提取沟谷线信息 ,从而有效地解决了土壤侵蚀评价中下垫面表征因子提取问题。并以黄河流域某小流域沟壑密度的计算作了实例验证。
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| 关 键 词： | 沟壑密度 数学形态学 TM影像 |
| 文章编号： | 1001-8107(2001)02-0024-04 |
| 修稿时间： | 2001年3月20日 |
An Algorithm for Extracting Ravine Density Based on Mathematical Morphology |
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| WEI Zhong-ya,ZHOU Gui-yun,LUO Wan-qin.An Algorithm for Extracting Ravine Density Based on Mathematical Morphology[J].Geography and Geo-Information Science,2001,17(2):24-27. |
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| Authors: | WEI Zhong-ya ZHOU Gui-yun LUO Wan-qin |
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| Institution: | WEI Zhong ya 1,ZHOU Gui yun 1,LUO Wan qin 2 |
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| Abstract: | Ravine density, which is an important factor indicating the extent of the fragmentation of the Earth surface, plays a significant role in the research of soil erosion and landform evolution, etc. An algorithm for extracting the ravine density based on mathematical morphology, which extracts the channels and vales from TM images, is introduced to solve the issue of the extraction of token factors in the evaluation of soil erosion. And the method is verified in the calculation of ravine density in a small watershed of the Yellow River basin. |
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| Keywords: | ravine density mathematical morphology TM image |
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