Abstract
In surveillance scenarios, the captured face images are often of low-resolution and contaminated by Gaussian noise. Noise creates problems in weighted linear representation, an essential process in attaining the reconstruction coefficients through conventional least square representation-based face hallucination models. To address this problem, a new face hallucination framework using average filtering-based data fidelity and locality regularization is proposed in this paper. In the proposed framework, an additional fidelity term is introduced which is accomplished through average filtered input and dictionary images. It helps in minimizing the reconstruction error. Moreover, the average filtering-based similarity matrix is introduced in the regularization term which succors the proposed framework in achieving more accurate locality, a quintessential component for face hallucination. The experimental analysis investigated on widely used public human face databases and locally captured CCTV footages reveal the better performance of the proposed framework over the compared state-of-the-art methods.
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Data Availability Statements
Data sharing is not applicable to this article as no datasets were generated. However, the source code of this work is available on email request to ershyamrajput@gmail.com
Notes
Due to the public unavailability of the source code of [28], I could not produce the results of this model for all noise levels considered in this paper. I found results for only σ = 5, 10, and 15 in their paper.
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Rajput, S.S. Gaussian noise robust face hallucination via average filtering based data fidelity and locality regularization. Appl Intell 53, 7917–7930 (2023). https://doi.org/10.1007/s10489-022-03901-w
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DOI: https://doi.org/10.1007/s10489-022-03901-w