A novel sparsity-inspired blind image quality assessment algorithm

K V S N L, Priya and Channappayya, Sumohana (2014) A novel sparsity-inspired blind image quality assessment algorithm. In: IEEE Global Conference on Signal and Information Processing (GlobalSIP) ), 3-5 Dec. 2014, Atlanta, GA.

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We present a novel blind image quality assessment (BIQA) algorithm inspired by the sparse representation of natural images in the human visual system (HVS). The hypothesis behind the proposed method is that the properties of natural images that afford their sparse representation are altered in the presence of distortion. We attempt to quantify this change in sparsity and show that it is indeed a measure of the unnatu-ralness or distortion in an image. We first construct an over-complete dictionary from a set of pristine images using the K-SVD algorithm. This dictionary is then used to sparsely represent a different and significantly smaller set of pristine images to extract "reference" features. To evaluate the quality of a given image, features are extracted from its sparse representation and quantified with respect to the "reference" features. We call our algorithm Sparsity-based Blind Image Quality Evaluation (SBIQE). We show that the proposed algorithm consistently correlates well with subjective scores over several popular image databases. Further, it compares reasonably with state-of-the-art BIQA algorithms. Additionally, our algorithm is both opinion-unaware and distortion-unaware.

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IITH Creators:
IITH CreatorsORCiD
Channappayya, SumohanaUNSPECIFIED
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: K-SVD, Sparse representation, no-reference IQA
Subjects: Others > Electricity
Others > Electronic imaging & Singal processing
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 03 Aug 2015 05:29
Last Modified: 01 Sep 2017 06:23
URI: http://raiith.iith.ac.in/id/eprint/1769
Publisher URL: https://doi.org/10.1109/GlobalSIP.2014.7032268
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