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Dual JPEG Compatibility: a Reliable and Explainable Tool for Image Forensics

Autor: Levecque, Etienne, Butora, Jan, Bas, Patrick

Given a JPEG pipeline (compression or decompression), this paper shows how to find the antecedent of a 8 x 8 block. If it exists, the block is compatible with the pipeline. For unaltered images, all blocks are always compatible with the original pipe

Externí odkaz: http://arxiv.org/abs/2408.17106

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Finding Incompatible Blocks for Reliable JPEG Steganalysis

Autor: Levecque, Etienne, Butora, Jan, Bas, Patrick

Publikováno v: IEEE Transactions on Information Forensics and Security, 2024

This article presents a refined notion of incompatible JPEG images for a quality factor of 100. It can be used to detect the presence of steganographic schemes embedding in DCT coefficients. We show that, within the JPEG pipeline, the combination of

Externí odkaz: http://arxiv.org/abs/2402.13660

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Compatibility and Timing Attacks for JPEG Steganalysis

Autor: Levecque, Etienne, Bas, Patrick, Butora, Jan

This paper introduces a novel compatibility attack to detect a steganographic message embedded in the DCT domain of a JPEG image at high-quality factors (close to 100). Because the JPEG compression is not a surjective function, i.e. not every DCT blo

Externí odkaz: http://arxiv.org/abs/2306.01317

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Oleylamine aging of PtNi nanoparticles giving enhanced functionality for the oxygen reduction reaction

Autor: Leteba, Gerard M, Wang, Yi-Chi, Slater, Thomas J A, Cai, Rongsheng, Byrne, Conor, Race, Christopher P, Mitchell, David R G, Levecque, Pieter B J, Young, Neil P, Walton, Alex, Kirkland, Angus I, Haigh, Sarah J, Lang, Candace I

Publikováno v: NanoLetters 21 (2021) 3989

We report a rapid solution-phase strategy to synthesize alloyed PtNi nanoparticles which demonstrate outstanding functionality for the oxygen reduction reaction (ORR). This one-pot co-reduction colloidal synthesis results in a monodisperse population

Externí odkaz: http://arxiv.org/abs/2111.13593

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Akademický článek

Preliminary experience of CT imaging of the ischaemic brain penumbra through spectral processing of multiphasic CTA datasets

Autor: T. Duprez, A. Vlassenbroek, A. Peeters, P. A. Poncelet, E. Levecque, F. Austein, G. Pahn, Y. Nae, S. Abdallah, E. Coche

Publikováno v: Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)

Abstract To assess ischaemic penumbra through the post-processing of the spectral multiphasic CT Angiography (mCTA) data in acute ischaemic stroke (AIS) patients. Thirty one consecutive patients strongly suspected of severe Middle Cerebral Artery AIS

Externí odkaz: https://doaj.org/article/ff6d8f3451104080b7b7b5552255e20c

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Akademický článek

Measurement System Analysis of Densometry Technique for the Determination of Porosity and Thickness of Porous Fuel Cell Media

Autor: Francois Van Schalkwyk, Aleksandrs Sakars, Pieter Levecque, Daria Susac

Publikováno v: ECS Advances, Vol 3, Iss 3, p 034501 (2024)

Porosity is one of the critical parameters governing mass transport of reagents and products in the heterogenous architecture of a fuel cell electrode. Techniques for the measurement thereof are required that are rapid, cost-effective, and simple, an

Externí odkaz: https://doaj.org/article/53bc028b340f4384acbdd61117e43a4f

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