MyJournals Home  

RSS FeedsEntropy, Vol. 21, Pages 1132: A Secure and Robust Image Hashing Scheme Using Gaussian Pyramids (Entropy)


20 november 2019 03:00:26

Entropy, Vol. 21, Pages 1132: A Secure and Robust Image Hashing Scheme Using Gaussian Pyramids (Entropy)

Image hash is an alternative to cryptographic hash functions for checking integrity of digital images. Compared to cryptographic hash functions, an image hash or a Perceptual Hash Function (PHF) is resilient to content preserving distortions and sensitive to malicious tampering. In this paper, a robust and secure image hashing technique using a Gaussian pyramid is proposed. A Gaussian pyramid decomposes an image into different resolution levels which can be utilized to obtain robust and compact hash features. These stable features have been utilized in the proposed work to construct a secure and robust image hash. The proposed scheme uses Laplacian of Gaussian (LOG) and disk filters to filter the low-resolution Gaussian decomposed image. The filtered images are then subtracted and their difference is used as a hash. To make the hash secure, a key is introduced before feature extraction, thus making the entire feature space random. The proposed hashing scheme has been evaluated through a number of experiments involving cases of non-malicious distortions and malicious tampering. Experimental results reveal that the proposed hashing scheme is robust against non-malicious distortions and is sensitive to detect minute malicious tampering. Moreover, False Positive Probability (FPP) and False Negative Probability (FNP) results demonstrate the effectiveness of the proposed scheme when compared to state-of-the-art image hashing algorithms proposed in the literature.

61 viewsCategory: Informatics, Physics
Entropy, Vol. 21, Pages 1130: Dynamical Behavior of ?-Lactamases and Penicillin- Binding Proteins in Different Functional States and Its Potential Role in Evolution (Entropy)
Entropy, Vol. 21, Pages 1131: Measurement Based Quantum Heat Engine with Coupled Working Medium (Entropy)
blog comments powered by Disqus
The latest issues of all your favorite science journals on one page


Register | Retrieve



Copyright © 2008 - 2020 Indigonet Services B.V.. Contact: Tim Hulsen. Read here our privacy notice.
Other websites of Indigonet Services B.V.: Nieuws Vacatures News Tweets Nachrichten