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  • 软件名称:斑块状植被遥感检测研究进展
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 刘庆生
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 斑块状植被是世界上干旱—半干旱区常见的景观类型,对于它们的形成、结构和演替研究能够提高人们对干旱—半干旱地区生态系统动态及其重要的生态水文过程的理解,具有重要的理论研究意义和应用价值。传统的基于地面调查和长期定位观测的方法观测范围有限,已无法满足目前区域斑块状植被分布及其空间格局特征研究的需要。利用遥感技术快速重复获取大面积对地观测数据,已成为斑块状植被检测的主要发展方向。通过对近20 a斑块状植被遥感检测相关文献的综述,阐述了现有研究中使用的航空和高分辨率卫星遥感数据、基于像元的检测方法、基于对象的检测方法和基于形态学的检测方法,以及各自的局限性和优势。在此基础上,对今后斑块状植被遥感检测的研究方向进行了展望,应加强高空间高光谱分辨率卫星遥感数据和低空无人机高光谱和激光雷达图像的应用,重视面向粘连斑块的新型图像分割算法研发,以期进一步提高斑块状植被检测的精度。 关键词: 斑块状植被;  航拍图像;  卫星影像;  检测方法     Abstract: Patch vegetation is a common landscape type in arid and semi-arid areas in the world. To detect patch vegetation using remotely sensed images is important for studying its pattern formation, function, and succession mechanisms, and understanding its impact on the ecohydrological processes in arid and semi-arid areas. This article reviews the current status of patch vegetation detection based on remote sensing technology, including remotely sensed data source such as aerial photographs and high-resolution satellite images, and application of detection approaches from pixel-based, object-based, and morphology-based methods, respectively. It is pointed out that the image quality, acquisition date of imagery, and the composition and structure of vegetation patch have an important influence on the classification of vegetation patch. For the overlapping patches, a better image segmentation algorithm is needed to be applied for improving detection accuracy. Finally, the research directions of remote sensing detection of vegetation patch are suggested in order to provide reference for monitoring patch vegetation patterns and dynamics in the future, including an application of high-spatial and spectral satellite remotely sensed imagery and unmanned aerial vehicle, and the development of more advanced image segmentation algorithms.

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