A colour composite of NOAA-AVHRR-NDVI based on time series analysis (1981-1992)
A colour composite of NOAA-AVHRR-NDVI based on time series analysis (1981-1992)
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DOI：
10.1080/01431169608949001
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发表时间：
1996-01-20
影响因子：
3.4
通讯作者：
Azzali, S
中科院分区：
文献类型：
--
作者：
Verhoef, W;Menenti, M;Azzali, S
一.图像南美洲的封面图像(图一)是通过计算归一化差异植被指数(NDVI)每月图像的时间序列(1981至1992年)的傅里叶变换得到的；在频域中，该时间序列由一组幅度和相位值表示。最大的幅值确定了时间序列中最重要的周期分量，这些分量很可能与气候和环境强迫因素有关。图像是使用强度、色调、饱和度(IHS)颜色表示法生成的，具有：
I. Image The cover image of South America (figure I) was obtained by calculating the Fourier transform of a time series (1981 to 1992) of monthly Normalized Difference Vegetation Index (NDVI) images; in the frequency domain the time series is represented by a set of amplitude and phase values. The largest amplitude values identify the most important periodic components of the time series, which are likely to be related to climatic and environmental forcing factors. The image was produced using Intensity, Hue, Saturation (IHS) colour representation with: