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Reversible Enhancement of Reversibly Data Embedded Images using HVS Characteristics of DCT
Rebecca Dhupppe, Sagar Gujjunoori, Gouthaman KV, Bharathi Ghosh
Pages - 94 - 105     |    Revised - 30-08-2016     |    Published - 01-06-2017
Volume - 11   Issue - 3    |    Publication Date - June 2017  Table of Contents
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KEYWORDS
Reversible Enhancement, DCT, HVS Characteristics, Visual Quality, Reversible Data Embedding.
ABSTRACT
In the recent, HVS based reversible data embedding is emerging. In a reversible data embedding scheme, in the process of achieving reversibility and embedding the data, it induces some distortions into marked image/video. If the distortions in marked image are random due to reversible embedding, it may not reveal much information about the existence of hidden data; on the contrary, if the distortions are repetitive geometric patterns which arises when an embedding scheme's emphasis is on capacity and reversibility, then the marked media with geometric distortions may reveal the existence of the hidden data. Further, in applications involving satellite images, medical, military, fine arts images, etc. which involves reversible embedding, it requires to show the details for inspection. Due to repetitive geometric distortions as in [6] and [7], the visual quality of image degrades. Hence, there is a need for enhancing the reversibly embedded images. To tackle this issue, if any exiting image enhancement scheme is used, it incur in loss of hidden data as well as the restoration of image to original form is not possible; hence, violating the requirement of reversibility for such applications. To address this problem we propose a reversible image enhancement scheme for reversibly data embedded images by using HVS characteristics of DCT. The experimental results show that the visual quality has been improved in terms of PSNR, PSNR-HVS, PSNR-HVS-M, and MSSIM when compared to S. Gujjunoori et al. scheme [6] and S. Gujjunoori et al. scheme [7], which contains repetitive geometrical distortions in marked media.
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Miss. Rebecca Dhupppe
Assistant Professor Department of CSE Vardhaman College of Engineering, Hyderabad, 501218, India - India
rebeccadhuppe@gmail.com
Dr. Sagar Gujjunoori
Professor Department of CSE Vardhaman College of Engineering, Hyderabad, 501218, India - India
Mr. Gouthaman KV
Junior Research Fellow Department of CSE Vardhaman College of Engineering, Hyderabad, 501218, India - India
Miss Bharathi Ghosh
Assistant Professor Department of CSE Vardhaman College of Engineering, Hyderabad, 501218, India - India