Open Access Research

A novel method in adaptive image enlargement

Mozhgan Bayat1, Ghazaleh Kafaie1*, Ali Ayremlou2 and Farrokh Marvasti1

Author Affiliations

1 Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran

2 Department of Electrical and Computer Engineering, Rice University, Houston, TX, USA

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EURASIP Journal on Advances in Signal Processing 2012, 2012:197  doi:10.1186/1687-6180-2012-197

Published: 7 September 2012

Abstract

This article introduces a new adaptive method for image interpolation. In order to obtain a high resolution (HR) image from its low resolution (LR) counterpart (original image), an interpolator function (array) is used, and the main focus of this manuscript is to formulate and define this function. By applying this interpolator function to each row and column of a LR image, it is possible to construct its HR counterpart. One of the main challenges of image interpolation algorithms is to maintain the edge structures while developing an HR image from the LR replica. The proposed approach overcomes this challenge and exhibits remarkable results at the image edges. The peak signal to noise ratio and structural similarity criteria by using this innovative technique are notably better than those achieved by alternative schemes. Also, in terms of implementation speed, this method displays a clear advantage and outperforms the high performance algorithms in the ability to decrease the artifact results of image enlargement such as blurring and zigzagging.

Keywords:
Image interpolation; Linear least square; Low resolution; High resolution