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Sub Pixel Classification of High Resolution Satellite Imagery

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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Year of Publication: 2015
Authors:
Mohammed Arif, Merugu Suresh, Kamal Jain, Sowjanya Dundhigal
10.5120/ijca2015906793

Mohammed Arif, Merugu Suresh, Kamal Jain and Sowjanya Dundhigal. Article: Sub Pixel Classification of High Resolution Satellite Imagery. International Journal of Computer Applications 129(1):9-15, November 2015. Published by Foundation of Computer Science (FCS), NY, USA. BibTeX

@article{key:article,
	author = {Mohammed Arif and Merugu Suresh and Kamal Jain and Sowjanya Dundhigal},
	title = {Article: Sub Pixel Classification of High Resolution Satellite Imagery},
	journal = {International Journal of Computer Applications},
	year = {2015},
	volume = {129},
	number = {1},
	pages = {9-15},
	month = {November},
	note = {Published by Foundation of Computer Science (FCS), NY, USA}
}

Abstract

The emergences of more Earth observation satellites have increased the use of satellite imagery in applications like Land cover detection, environment monitoring etc. The information is generally extracted from satellite images by classification techniques. A common Problem associated with classification process is frequent occurrence of mixed pixel. Mixed Pixels are major cause of uncertainty in image classification process. Soft classifiers provide quantitative presence of a class in a pixel but the spatial location of this class remains unexplored. Subpixel classification and swapping have evolved as a latest technique to generate superior subpixel swapping images by considering output of soft classification process. SRM algorithms are mainly classified as spatial optimization based and regression based approaches. However the spatial optimization techniques are more applicable. The major drawback of conventional techniques is non-random allocation of classes to sub pixels which leads to iterative procedure of optimization that is time taking. In this paper, the proposed method performs an initial non-random allocation of classes to sub pixel and optimization procedure adapted is performed to overcome multiple and non-allocated sub pixels to simplify SRM approach and curtail processing time. Proposed method uses soft classification approaches for generating fractional maps which is provided as input to SRM method. Early allocation of sub pixels is achieved based on amount of attractiveness to neighborhood pixels.

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Keywords

Subpixel mapping, subpixel classification, satellite images, landuse landcover and remote sensing data.