SIFT-FANN: An efficient framework for spatio-spectral fusion of satellite images

Rai, Kunal Kumar and Rai, Aparna and Dhar, Kanishka and Senthilnath, J and Omkar, S N and Ramesh, K N (2017) SIFT-FANN: An efficient framework for spatio-spectral fusion of satellite images. In: JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING, 45 (1). pp. 55-65.

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Abstract

Image fusion techniques are widely used for remote sensing data. A special application is for using low resolution multi-spectral image with high resolution panchromatic image to obtain an image having both spectral and spatial information. Alignment of images to be fused is a step prior to image fusion. This is achieved by registering the images. This paper proposes the methods involving Fast Approximate Nearest Neighbor (FANN) for automatic registration of satellite image (reference image) prior to fusion of low spatial resolution multi-spectral QuickBird satellite image (sensed image) with high spatial resolution panchromatic QuickBird satellite image. In the registration steps, Scale Invariant Feature Transform (SIFT) is used to extract key points from both images. The keypoints are then matched using the automatic tuning algorithm, namely, FANN. This algorithm automatically selects the most appropriate indexing algorithm for the dataset. The indexed features are then matched using approximate nearest neighbor. Further, Random Sample Consensus (RanSAC) is used for further filtering to obtain only the inliers and co-register the images. The images are then fused using Intensity Hue Saturation (IHS) transform based technique to obtain a high spatial resolution multi-spectral image. The results show that the quality of fused images obtained using this algorithm is computationally efficient.

Item Type:	Journal Article
Publication:	JOURNAL OF THE INDIAN SOCIETY OF REMOTE SENSING
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	03 Apr 2017 04:46
Last Modified:	03 Apr 2017 04:46
URI:	http://eprints.iisc.ac.in/id/eprint/56440

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