Results 51 to 60 of about 2,854 (228)

Photon-Counting Security Tagging and Verification Using Optically Encoded QR Codes

IEEE Photonics Journal, 2014
We propose an optical security method for object authentication using photon-counting encryption implemented with phase encoded QR codes. By combining the full phase double-random-phase encryption with photon-counting imaging method and applying an ...
A. Markman, B. Javidi, M. Tehranipoor
doaj   +1 more source

Robust steganographic framework for securing sensitive healthcare data of telemedicine using convolutional neural network

CAAI Transactions on Intelligence Technology, EarlyView.
Abstract Data is the key element that runs the modern society. Large amounts of data are being released day by day as a result of many activities. The digital data is transferred through the Internet which may be vulnerable to attacks while transmitting. Especially, the medical data is observed to be of at most importance.
Rupa Ch, Venkayya Yadlapalli, Suhana Sulthana Sk, G. Thippa Reddy, Sandeep Kautish   +4 more
wiley   +1 more source

Investment centre manager's multiperiod fairness perceptions and intertemporal dependency

Accounting &Finance, Volume 65, Issue 1, Page 3-36, March 2025.
Abstract This paper explores the motivation of investment centre managers when their investment centre's performance is affected by decisions made by their predecessor. Through a qualitative case study of a Japanese manufacturer, the effectiveness of conventional remedies for motivational issues and further motivational issues caused by the same ...
Hiroyuki Selmes‐Suzuki
wiley   +1 more source

A cryptographic method to have a secure communication of health care digital data into the cloud

Automatika
Cloud computing is a technology that holds great promise and has potential to revolutionize the healthcare sector. Many security and privacy issues are brought up by the cloud’s centralization of data for both patients and healthcare professionals. There
K. Selvakumar, S. Lokesh
doaj   +1 more source

Variable‐Rate Texture Compression: Real‐Time Rendering with JPEG

Computer Graphics Forum, EarlyView.
Abstract Although variable‐rate compressed image formats such as JPEG are widely used to efficiently encode images, they have not found their way into real‐time rendering due to special requirements such as random access to individual texels. In this paper, we investigate the feasibility of variable‐rate texture compression on modern GPUs using the ...
Elias Kristmann, Michael Wimmer, Markus Schütz   +2 more
wiley   +1 more source

Spreading Code Design for a MC-CDMA Based GNSS Pilot Signal

, 2010
MC-CDMA can represent an alternative to classical DS-CDMA for the design of GNSS ranging signals. A first requirement MC-CDMA signals must fulfill is that their generation on a satellite payload be feasible.
Meurer, Michael, Seco-Granados, Gonzalo, Vergara, Mariano, Felix Antreich, Gonzalo Seco-Granados, Antreich, Felix, Mariano Vergara, Michael Meurer   +7 more
core   +1 more source

Optimal Skeleton Huffman Trees Revisited [PDF]

, 2020
A skeleton Huffman tree is a Huffman tree in which all disjoint maximal perfect subtrees are shrunk into leaves. Skeleton Huffman trees, besides saving storage space, are also used for faster decoding and for speeding up Huffman-shaped wavelet trees.
Merkurev, O., Oleg Merkurev, Kosolobov, D., Dmitry Kosolobov   +3 more
core   +1 more source

Huffman coding with unequal letter costs [PDF]

Proceedings of the thiry-fourth annual ACM symposium on Theory of computing - STOC '02, 2002
(MATH) In the standard Huffman coding problem, one is given a set of words and for each word a positive frequency. The goal is to encode each word w as a codeword c(w) over a given alphabet. The encoding must be prefix free (no codeword is a prefix of any other) and should minimize the weighted average codeword size Σw freq w, |c(w)|. The problem has a
Mordecai J. Golin, Claire Kenyon, Neal E. Young   +2 more
openaire   +2 more sources

NAADF: Globally Illuminated Voxel Worlds Accelerated with Nested Axis‐Aligned Distance Fields

Computer Graphics Forum, EarlyView.
Abstract Achieving realistic rendering of 3D scenes in real time using path tracing is challenging due to the high sample count required, with ray tracing as the bottleneck. Focusing on voxels as a geometry representation offers significant opportunities for optimizations, especially for tracing the rays, but also for computing the samples.
A. Ulschmid, M. Ott, J. Macho, M. Wimmer, S. Ohrhallinger   +4 more
wiley   +1 more source

An Efficient Coding Technique for Stochastic Processes

Entropy, 2021
In the framework of coding theory, under the assumption of a Markov process (Xt) on a finite alphabet A, the compressed representation of the data will be composed of a description of the model used to code the data and the encoded data. Given the model,
Jesús E. García, Verónica A. González-López, Gustavo H. Tasca, Karina Y. Yaginuma   +3 more
doaj   +1 more source