排序方式： 共有5条查询结果，搜索用时 109 毫秒
1
1.
In mountainous areas, it is the undulant terrain, various types of geomorphic and land use that make the remote sensing images great metamorphism. Moreover, due to the elevation, there are many areas covered with shadow, clouds and snow that make the images more inaccurate. As a result, it would be very difficult to carry out auto-classification of RS images in these areas. The study took Southwest China as the case study area and the TM images, SPOT images as the basic information sources assisted by the a... 相似文献
2.
基于ASTER GDEM数据喀斯特区域地貌类型划分与分析 总被引：5，自引：1，他引：4
以30 m分辨率ASTER GDEM数据为基础,通过GIS空间分析和非监督分类的方法进行地貌基本类型的自动划分。研究结果表明:①ASTERGDEM数据能够满足1∶10万比例尺下喀斯特区域的地表形态表达;②以流域为单位提取地形因子符合地貌发育的基本规律,提取的地形因子能客观的反应地表真实形态;③采用非监督分类法能够有效的实现1∶10万比例尺下地貌基本形态的定量化、自动化分类。 相似文献
3.
加权模糊C均值算法(WFCM)是1种有效的图像分割算法,该算法的分类数需要人工确定。为了提高算法的自动化程度,本文提出了先采用基于直方图平滑的峰点检测方法自动确定图像的分类数,再利用WFCM分割图像的算法。大量实验结果显示,此算法能够正确地对图像分类,并且合理地分割图像。 相似文献
4.
土地利用信息的多元分析提取 总被引：1，自引：0，他引：1
由遥感(RS)、地理信息系统(GIS)和全球定位系统(GPS)获取、处理、分析空间信息,已成为研究资源环境的重要技术手段。在土地利用信息提取中,我们先后应用了传统目视解译方法、人机交互解译方法、计算机自动分类方法、多源信息复合分析等方法。本文在分析现有各种方法优缺点的基础上,提出了“综合自动分类方法”,并以北京市密云县为例,对土地利用信息进行了提取。分析表明:综合自动分类方法在分类结果的客观性、科学性、实用性等方面,具有一定的优势。 相似文献
5.
In mountainous areas, it is the undulant terrain, various types of geomorphic and land use that make the remote sensing images
great metamorphism. Moreover, due to the elevation, there are many areas covered with shadow, clouds and snow that make the
images more inaccurate. As a result, it would be very difficult to carry out auto-classification of RS images in these areas.
The study took Southwest China as the case study area and the TM images, SPOT images as the basic information sources assisted
by the auxiliary data of DEM, NDVI, topographical maps and soil maps to preprocess the images. After preprocessing by topographic
correction and wiping off clouds, snow and shadows, all the image data were stacked together to form the images to be classified.
Then, the research used segmentation technology and hierarchical method to extract the main types of land use in the area
automatically. The results indicated that the qualitative accuracies of all types of land use extracted in Southwest China
were above 90 percent, and the quantitative accuracies was above 86 percent. The goal of reducing workloads had been realized.
Supported by the National Public Welfare Project on Environmental Protection (2007KYYW21), the Program of National Science
and Technology research( 2006BAC01A01-05). 相似文献
1