摘要
【目的】利用卫星遥感数据分析林果与其他地物的差异,并对林果中的苹果、香梨、核桃、红枣四种果树之间的差异性进行试验性研究,为林果区提取和果树树种识别提供理论依据。【方法】以新疆阿克苏市为研究区,以HJ卫星数据为数据源,结合当地实地调查资料,采用光谱分析法、归一化差值植被指数(NDVI)时序数据变化分析方法以及微分变换(d1[log(1/Rλ)])方法,对林果与其他地物的差异性和果树之间的差异性进行分析。【结果】(1)林果与其他地物在5月时相上的差异显著;(2)4和11月两个时相上的微分变换数据显示,红枣和核桃与其他两种果树差异明显,苹果和香梨相近。【结论】(1)利用HJ星遥感数据能对林果区进行准确提取;(2)利用HJ-CCD数据可以识别红枣和核桃,苹果和香梨的识别较难,有待进一步研究。
[Objective] The purpose of this project was to analyze the differences between fruit trees, such as apples, pears, walnuts and jujubes and other surface features. Some experimental researches into these differences have been done based on HJ satellite data, thus providing a theoretical base for the extraction of fruit trees and the identification of species. [Method]With field survey data in Aksu area and basing on the HJ satellite data, the difference was analyzed by spectral analysis method and normalized vegetation index （NDVI） time series data during the growth period and derivative transformation （ d1 [ log（ 1/Rx） ] ） method. [ Result ] （ 1 ） The difference between fruit trees and other surface features was significant in the image which was imaged in May; （2） By derivative transforming, the data, their imaged times were in April and November, which showed that walnut and jujube trees had some different characteristics from tile other fruit trees, but there was not significant difference between apple and pear trees. [ Conclusion ] （ 1 ） The fruit trees messages can be extracted accurately based on HJ satellite data; （2） Walnut and jujube trees can be identified by HJ - CCD data, but it＇s rather difficult to identify apple and pear trees. So it need further study.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2011年第11期1967-1973,共7页
Xinjiang Agricultural Sciences
基金
新疆维吾尔自治区科技兴农项目"林果业冻害气象监测预警技术推广应用"
广西科学研究与技术开发计划课题(桂科攻0816006-8)
关键词
HJ卫星
林果
光谱特征
HJ
fruit trees
spectral characteristics
