Results 41 to 50 of about 48,579 (315)

A Combination of SHA-256 and DES for Visual Data Protection

Jurnal Masyarakat Informatika
This study employs SHA-256 and DES algorithms to safeguard visual data through encryption and decryption processes. Research findings demonstrate that this method provides robust security with image histograms that are difficult to recognize and randomly
Aristides Bima Wintaka, Christy Atika Sari, Eko Hari Rachmawanto, Rabei Raad Ali   +3 more
doaj   +1 more source

Comparing Simulation Model for Objective QoE Video Evaluation with real IPTV Test Scenario During Appearance of Packet Losses

Telfor Journal, 2020
The aim of this article is to explain benefits of the simulation model for objective QoE (Quality of Experience) video evaluation in order to find similarities with real IPTV (Internet Protocol TeleVision) system distribution in a DSL (Digital Subscriber
N. Goran, A. Begović, N. Škaljo
doaj   +1 more source

Optimizing Multiscale SSIM for Compression via MLDS [PDF]

IEEE Transactions on Image Processing, 2012
A crucial step in the assessment of an image compression method is the evaluation of the perceived quality of the compressed images. Typically, researchers ask observers to rate perceived image quality directly and use these rating measures, averaged across observers and images, to assess how image quality degrades with increasing compression.
Charrier, Christophe, Knoblauch, Kenneth, Maloney, Laurence, Bovik, Alan, Moorthy, Anush   +4 more
openaire   +4 more sources

Merger as Intermittent Accretion

, 2008
The Self-Similar Secondary Infall Model (SSIM) is modified to simulate a merger event. The model encompass spherical versions of tidal stripping and dynamical friction that agrees with the Syer & White merger paradigm's behaviour.
Ascasibar, Ascasibar, Avila-Reese, Barnes, Bertschinger, Binney, del Popolo, Diemand, Fillmore, Gunn, Henriksen, Henriksen, Henriksen, Henriksen, Henriksen, Henriksen, Henriksen, Hiotelis, Hoffman, Le Delliou, Lu, M. Le Delliou, MacMillan, Navarro, Ryden, Salvador-Solé, Syer, Williams   +27 more
core   +2 more sources

Bilevel parameter learning for higher-order total variation regularisation models [PDF]

, 2015
We consider a bilevel optimisation approach for parameter learning in higher-order total variation image reconstruction models. Apart from the least squares cost functional, naturally used in bilevel learning, we propose and analyse an alternative cost ...
Reyes, J. C. De los, Schönlieb, C. -B., Valkonen, T.   +2 more
core   +3 more sources

Simulation of Scour at Bridge Supports

Građevinar, 2020
Groups of piers are used on bridges to minimise scour around bridge supports. The prediction of scour around piers due to interaction of vortices around bridge piers is more complex compared to scour prediction around a single pier.
Yasser Moussa, Mahoud Atta
doaj   +1 more source

Exact Histogram Specification Optimized for Structural Similarity

, 2008
An exact histogram specification (EHS) method modifies its input image to have a specified histogram. Applications of EHS include image (contrast) enhancement (e.g., by histogram equalization) and histogram watermarking.
Alireza Nasiri Avanaki, D. Coltuc, D. Coltuc, D. Coltuc, D. Coltuc, E. L. Hall, H. Zhu, I.-L. Jung, J. A. Stark, J. Y. Kim, M. Barni, P. J. S. G. Ferreira, R. C. Gonzales, R. C. Gonzales, S.-C. Pei, T. H. Cormen, V. Caselles, Y. J. Zhang, Y. Wan, Z. Wang, Z. Wang   +20 more
core   +1 more source

Video quality assessment method: MD-SSIM [PDF]

2015 IEEE International Conference on Consumer Electronics - Taiwan, 2015
In this paper, video quality assessment (VQA) for compression losses is the main focus. A new method, MD-SSIM (Mean Squared Error Difference SSIM) is used for detecting the spatial distortion. For the temporal part, the differences of the SSIM scores of each frame are used to form the quality scores.
Woei-Tan Loh, David B. L. Bong
openaire   +1 more source

Improving Image Restoration with Soft-Rounding

, 2015
Several important classes of images such as text, barcode and pattern images have the property that pixels can only take a distinct subset of values.
Hu, Bao-Gang, Lyu, Siwei, Mei, Xing, Qi, Honggang   +3 more
core   +1 more source

A contrast-sensitive reversible visible image watermarking technique [PDF]

, 2009
A reversible (also called lossless, distortion-free, or invertible) visible watermarking scheme is proposed to satisfy the applications, in which the visible watermark is expected to combat copyright piracy but can be removed to losslessly recover the ...
Li, Chang-Tsun, Sun, Xingming, Xiao, R. (Rong), Yang, Hengfu, Yang, Y. (Ying)   +4 more
core   +1 more source