农业工程学报2011，Vol.27Issue(7)：220-225,6.DOI:10.3969/j.issn.1002-6819.2011.07.039
基于小波变换的华北平原耕地复种指数提取
New method for extracting multiple cropping index of North China Plainbased on wavelet transform
摘要
Abstract
This study chose the North China Plain as study area and proposed a new method of multiple cropping extraction from remote sensing data based on wavelet transform. Firstly, using wavelet transform to de-noise time-series SPOT VGT/NDVI (SPOT VEGETATION/normalized difference vegetation index) remote sensing data and reconstructing NDVI curve of main crops in North China Plain. Then, combining with ground samples data, farming season data and agricultural statistics data, this study extracted the multiple cropping index and spatial distribution of the North China Plain based on the double difference method. The results show that the multiple cropping index in Henan province is the largest, up to 179.4%, followed by Shandong province, which in Beijing is the smallest among the five provinces in the area, and the spatial distribution of the multiple cropping index has obvious geographical characteristics. Comparing with statistical data and other results based on remote sensing technologies, the results have the better consistency and the spatial distribution has convergence.关键词
遥感/小波变换/时间序列分析/归一化植被指数(NDVI)/复种指数/去噪Key words
remote sensing/wavelet transforms/time-series analysis/normalized difference vegetation index/multiple cropping index/de-noise分类
农业科技引用本文复制引用
唐鹏钦,吴文斌,姚艳敏,杨鹏..基于小波变换的华北平原耕地复种指数提取[J].农业工程学报,2011,27(7):220-225,6.基金项目
全球变化研究国家重大科学研究计划项目(2010CB951500) （2010CB951500）
国家自然科学基金项目(40930101). （40930101）
