| 基于连续小波变换的NOAA热红外影像信号场分析 |
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| 引用本文： | 陈建裕,郭德方,杨则东.基于连续小波变换的NOAA热红外影像信号场分析[J].浙江大学学报(理学版),2004,31(6):696-700. |
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| 作者姓名： | 陈建裕 郭德方 杨则东 |
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| 作者单位： | 1. 浙江大学,地球科学系,浙江,杭州,310027
2. 安徽省地质遥感中心,安徽,合肥,230001 |
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| 摘 要： | 利用二维连续小波变换(墨西哥帽小波),结合影像下的地物类型分布,对多时相的NOAA/AVHRR影像4波段数据进行信号场分析.结果表明,在小尺度下显示不同地物类型、相对差异、位置及形状等信息;而在大尺度则主要表现了水陆、地貌导致的地域差异.不同时相数据的大尺度分析对比,体现了空间格局和变化趋势.
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| 关 键 词： | 连续小波变换 尺度分析 信号场分析 |
| 文章编号： | 1008-9497(2004)06-696-05 |
| 修稿时间： | 2003年8月14日 |
Study on signal analysis in NOAA/AVHRR image using 2D CWT |
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| CHEN Jian-yu,GUO De-fang,YANG Ze-dong.Study on signal analysis in NOAA/AVHRR image using 2D CWT[J].Journal of Zhejiang University(Sciences Edition),2004,31(6):696-700. |
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| Authors: | CHEN Jian-yu GUO De-fang YANG Ze-dong |
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| Abstract: | Continuous wavelet transform (CWT) analysis at NOAA/AVHRR thermal data (Channels 4 when present) was made by the approach of the isotropic 2D Mexican hat wavelet. Each component is studied with multi-scale matched against the classification of land-cover on multi-date data to reveal 2D signals in the temporal variation and spatial patterns. The result shows the information about type of land cover and relation, location, and shape in small scale and emphasizes the strengths and features of its trend and structure in large scale. |
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| Keywords: | continuous wavelet transform multi-scale analysis signal analysis |
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