农业工程学报2011，Vol.27Issue(4)：219-224,6.DOI:10.3969/j.issn.1002-6819.2011.04.038
基于HJ-1A/1B CCD时间序列影像的水稻生育期监测
Monitoring rice growth stages based on time series HJ-1A/1B CCD images
摘要
Abstract
Crop growth stages information in large-scale is crucial to guide the management and decision-making in agriculture production.In order to obtain a precise information, a wavelet-based method for estimating rice growth stages was proposed based on 42 cloudless HJ-1A/1B CCD images in Hunan's double cropping rice growth period in 2009 and 2010.Firstly, a time-series EVI dataset at day frequency at pixel scale was built by linear interpolation.Then a profile, which reflects the rice growth process, was produced by filtering based on wavelet analysis.At last, the critical growth stages could be estimated according to the characteristics of the curve.As an example, 20 parcels in situ investigation for rice heading date in Yuanjiang City were used to verify the results, and the wavelet-based method was compared to those based on non-symmetrical Gaussian function and Savitzky-Golay filtering.The result showed that the proposed method, with an average error of 3 days which was less than the latter’s errors, could accurately monitor heading date of double cropping rice.This method is available in monitoring rice crop growth stages.关键词
作物/生长/时间序列分析/水稻/生育期/HJ-1A/1B CCD/小波分析Key words
crops/ growth/ time series analysis/ rice/ growth stages/ HJ-1A/1B CCD/ wavelet analysis method分类
农业科技引用本文复制引用
杨浩,黄文江,王纪华,杨贵军,屠乃美,杨小冬,王大成..基于HJ-1A/1B CCD时间序列影像的水稻生育期监测[J].农业工程学报,2011,27(4):219-224,6.基金项目
国家自然科学青年基金项目(40901173)、面上基金项目(41071276),公益性行业科研专项(200803037) （40901173）
