Image Processing Reference
In-Depth Information
Chapter 10
Segmentation and Object-Based Image Analysis
Elisabeth Schöpfer, Stefan Lang, and Josef Strobl
This chapter focuses on segmentation of remotely sensed image data and object-based
image analysis. It discusses the differences between pixel-based and object-based
image analysis; the potential of the object-based approach; and, the application of
eCognition software for performing image segmentation and classification at differ-
ent levels of detail.
Learning Objectives
Upon completion of this chapter, you should be able to:
Explain the principles of image segmentation
Differentiate between pixel-based and object-based image analysis
Speculate on object-based classification
10.1
Introduction
The number of operational high-resolution satellite and air-borne sensors has
increased significantly during the last years. The obtained images provide more and
more detail about land and water surfaces and hence permit us to observe additional
E. Schöpfer ( * )
German Aerospace Center (DLR), German Remote Sensing
Data Center (DFD) Oberpfaffenhofen, 82234 Wessling, Germany
e-mail: elisabeth.schoepfer@dlr.de
S. Lang
Centre for Geoinformatics, University of Salzburg, Schillerstraße 30, Salzburg 5020, Austria
e-mail: stefan.lang@sbg.ac.at
J. Strobl
Austrian Academy of Sciences, Geographic Information Science, Schillerstraße 30,
Salzburg 5020, Austria
e-mail: josef.strobl@oeaw.ac.at
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