Share Email Print
cover

Proceedings Paper

Comparison of three sub-pixel computation approaches
Author(s): An Zhao; Lin Zheng; Meixin Jiang
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Sub-pixel classification is a tough issue in remote sensing field. Although many kinds of software or its Module can be used to address this problem, their rationale, algorithms and methodologies are different, resulting in different use of different method for different purpose. This makes many users feel confused when they want to detect mixed feature content within a pixel and to use sub-pixel approach for practical application. It is necessary to make an in-depth comparison study for different sub-pixel methods in order for RS&GIS users to choose proper sub-pixel methods for their specific applications. After reviewing the basic theories and methods in dealing with sub-pixels, this paper made an introductory analysis to their principles, algorithms, parameters and computing process of three sub-pixel calculation methods, or Linear Unmixing in platform ILWIS3.0, Erdas8.5's Sub-pixel Classifier, eCognition3.0's Nearest Neighbor. A case study of three sub-pixel methods was then made of flood monitoring in Poyang Lake region of P.R.China with image data of band-1 and band-2 of NOAA AVHRR image. Finally, a theoretic, technological and practical comparison study was made of these three sub-pixel methods in aspects of the basic principles, the parameters to be set, the suitable application fields and their respective use limitation. Opinions and comments were presented in the end on the use of the sub-pixel calculation results of these three methods in a hope to provide some reference to future sub-pixel application study for the researchers in interest.

Paper Details

Date Published: 28 October 2005
PDF: 10 pages
Proc. SPIE 5983, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V, 598303 (28 October 2005); doi: 10.1117/12.627442
Show Author Affiliations
An Zhao, Institute of Geographic Sciences and Resources Research, CAS (China)
Jiangxi Normal Univ. (China)
Lin Zheng, Jiangxi Normal Univ. (China)
Meixin Jiang, Jiangxi Normal Univ. (China)


Published in SPIE Proceedings Vol. 5983:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V
Manfred Ehlers; Ulrich Michel, Editor(s)

© SPIE. Terms of Use
Back to Top