Segmentation performance evaluation for object-based remotely sensed image analysis


Corcoran, Padraig and Winstanley, Adam C. and Mooney, Peter (2010) Segmentation performance evaluation for object-based remotely sensed image analysis. International Journal of Remote Sensing, 31 (3). pp. 617-645. ISSN 0143-1161

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Abstract

The initial step in most object-based classification methodologies is the application of a segmentation algorithm to define objects. Modelling the human visual process of object segmentation is a challenging task. Many theories in cognitive psychology propose that the human visual system (HVS) initially segments scenes into areas of uniform visual properties or primitive objects. If an accurate primitive-object segmentation algorithm is ever to be realized, a procedure must be in place to evaluate potential solutions. The most commonly used strategy to evaluate segmentation quality is a comparison against ground truth captured by human interpretation. A cognitive experiment reveals that ground truth captured in such a manner is at a larger scale than the desired primitive-object scale. To overcome this difficulty we consider the possibility of evaluating segmentation quality in an unsupervised manner without ground truth. Two requirements for any method which attempts to perform segmentation evaluation in such a manner are proposed, and the importance of these is illustrated by the poor performance of a metric which fails to meet them both. A novel metric, known as the spatial unsupervised (SU) metric, which meets both the requirements is proposed. Results demonstrate the SU metric to be a more reliable metric of segmentation quality compared to existing methods.

Item Type: Article
Keywords: Segmentation performance evaluation; object-based remotely sensed image analysis; object-based classification methodologies;
Academic Unit: Faculty of Science and Engineering > Computer Science
Item ID: 8069
Identification Number: 10.1080/01431160902894475
Depositing User: Dr. Adam Winstanley
Date Deposited: 24 Mar 2017 16:48
Journal or Publication Title: International Journal of Remote Sensing
Publisher: Taylor & Francis
Refereed: Yes
Funders: Irish Research Council for Science Engineering and Technology (IRCSET), Science Foundation Ireland (SFI)
URI:

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