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Proceedings Paper

Rapid assessment of large scale vegetation change based on multi-temporal phenological analysis
Author(s): Danlu Cai; Yanning Guan; Shan Guo; Baoping Yan; Zhi Xing; Chunyan Zhang; Yingchao Piao; Xudong An; Lihua Kang
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Paper Abstract

Detecting vegetation change is critical for earth system and sustainability science. The existing methods, however, show several limitations, including inevitable selection of imagery acquisition dates, affection from vegetation related noise on temporal trajectory analysis, and assumptions due to vegetation classification model. This paper presents a multitemporal phenological frequency analysis over a relatively short period (MTPFA-SP) methodology to detect vegetation changes. This MTPFA-SP methodology bases on the amplitude components of fast Fourier transforming (FFT) and is implemented with two steps. First, NDVI time series over two periods are transformed with FFT into frequency domain, separately. Second, amplitude components with phenological information from Step 1 are selected for further change comparison. In this methodology, component selection shows physical meanings of natural vegetation process in frequency domain. Comparisons among those selected components help enhance the ability to rapidly detect vegetation changes. To validate this MTPFA-SP methodology, we detect changes between two periods (2001-2005 and 2006-2010) in the eastern Tibet Plateau area and make two kinds of assessments. The first is for a larger scale, including statistic analysis of altitudinal zonality and latitudinal zonality. The second assessment is for rapid detection of vegetation change location. Landsat TM image were employed to validate the result.

Paper Details

Date Published: 8 December 2011
PDF: 8 pages
Proc. SPIE 8002, MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis, 80020I (8 December 2011); doi: 10.1117/12.901879
Show Author Affiliations
Danlu Cai, Institute of Remote Sensing Applications (China)
Graduate Univ. of CAS (China)
Yanning Guan, Institute of Remote Sensing Applications (China)
Shan Guo, Institute of Remote Sensing Applications (China)
Baoping Yan, Information Ctr. Of Computer Network (China)
Zhi Xing, Qinghai Lake National Nature Reserve (China)
Chunyan Zhang, Institute of Remote Sensing Applications (China)
Yingchao Piao, Information Ctr. Of Computer Network (China)
Graduate Univ. of CAS (China)
Xudong An, Institute of Remote Sensing Applications (China)
Lihua Kang, Institute of Remote Sensing Applications (China)


Published in SPIE Proceedings Vol. 8002:
MIPPR 2011: Multispectral Image Acquisition, Processing, and Analysis
Faxiong Zhang; Faxiong Zhang, Editor(s)

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