Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 37-41, 2015
https://doi.org/10.5194/isprsarchives-XL-1-W5-37-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
10 Dec 2015
A COMPARISON STUDY OF DIFFERENT MARKER SELECTION METHODS FOR SPECTRAL-SPATIAL CLASSIFICATION OF HYPERSPECTRAL IMAGES
D. Akbari1, A. R. Safari1, S. Homayouni2, and S. Khazai3 1Surveying and Geomatics Engineering Dept., College of Engineering, University of Tehran, Tehran, Iran
2Dept. of Geography, University of Ottawa, Ottawa, Canada
3Dept. of Civil Engineering, College of Engineering, Imam Hussein Comprehensive University, Tehran, Iran
Keywords: hyperspectral images, spectral-spatial classification, marker selection, segmentation Abstract. An effective approach based on the Minimum Spanning Forest (MSF), grown from automatically selected markers using Support Vector Machines (SVM), has been proposed for spectral-spatial classification of hyperspectral images by Tarabalka et al. This paper aims at improving this approach by using image segmentation to integrate the spatial information into marker selection process. In this study, the markers are extracted from the classification maps, obtained by both SVM and segmentation algorithms, and then are used to build the MSF. The segmentation algorithms are the watershed, expectation maximization (EM) and hierarchical clustering. These algorithms are used in parallel and independently to segment the image. Moreover, the pixels of each class, with the largest population in the classification map, are kept for each region of the segmentation map. Lastly, the most reliable classified pixels are chosen from among the exiting pixels as markers. Two benchmark urban hyperspectral datasets are used for evaluation: Washington DC Mall and Berlin. The results of our experiments indicate that, compared to the original MSF approach, the marker selection using segmentation algorithms leads in more accurate classification maps.
Conference paper (PDF, 1278 KB)


Citation: Akbari, D., Safari, A. R., Homayouni, S., and Khazai, S.: A COMPARISON STUDY OF DIFFERENT MARKER SELECTION METHODS FOR SPECTRAL-SPATIAL CLASSIFICATION OF HYPERSPECTRAL IMAGES, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W5, 37-41, https://doi.org/10.5194/isprsarchives-XL-1-W5-37-2015, 2015.

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