On the Role of Feedforward in Gaussian Sources: Point-to-Point Source Coding and Multiple Description Source Coding

2007 ◽  
Vol 53 (1) ◽  
pp. 331-349 ◽  
Author(s):  
S. Sandeep Pradhan
Keyword(s):  
Point Source ◽  
Source Coding ◽  
Multiple Description ◽  
Gaussian Sources ◽  
Point To Point

scholarly journals Improving 3D-3D facial registration methods: potential role of three-dimensional models in personal identification of the living

2021 ◽  
Author(s):  
Daniele Gibelli ◽  
Andrea Palamenghi ◽  
Pasquale Poppa ◽  
Chiarella Sforza ◽  
Cristina Cattaneo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
Personal Identification ◽  
Surveillance Systems ◽  
3D Registration ◽  
Three Dimensional Models ◽  
Point To Point ◽  
Point Distance ◽  
Male Subjects

AbstractPersonal identification of the living from video surveillance systems usually involves 2D images. However, the potentiality of three-dimensional facial models in gaining personal identification through 3D-3D comparison still needs to be verified. This study aims at testing the reliability of a protocol for 3D-3D registration of facial models, potentially useful for personal identification. Fifty male subjects aged between 18 and 45 years were randomly chosen from a database of 3D facial models acquired through stereophotogrammetry. For each subject, two acquisitions were available; the 3D models of faces were then registered onto other models belonging to the same and different individuals according to the least point-to-point distance on the entire facial surface, for a total of 50 matches and 50 mismatches. RMS value (root mean square) of point-to-point distance between the two models was then calculated through the VAM® software. Intra- and inter-observer errors were assessed through calculation of relative technical error of measurement (rTEM). Possible statistically significant differences between matches and mismatches were assessed through Mann–Whitney test (p < 0.05). Both for intra- and inter-observer repeatability rTEM was between 2.2 and 5.2%. Average RMS point-to-point distance was 0.50 ± 0.28 mm in matches, 2.62 ± 0.56 mm in mismatches (p < 0.01). An RMS threshold of 1.50 mm could distinguish matches and mismatches in 100% of cases. This study provides an improvement to existing 3D-3D superimposition methods and confirms the great advantages which may derive to personal identification of the living from 3D facial analysis.

scholarly journals Lossless Source Coding in the Point-to-Point, Multiple Access, and Random Access Scenarios

2020 ◽  
Vol 66 (11) ◽  
pp. 6688-6722
Author(s):  
Shuqing Chen ◽  
Michelle Effros ◽  
Victoria Kostina
Keyword(s):  
Multiple Access ◽  
Source Coding ◽  
Random Access ◽  
Point To Point

scholarly journals On the Role of the Refinement Layer in Multiple Description Coding and Scalable Coding

2011 ◽  
Vol 57 (3) ◽  
pp. 1443-1456 ◽  
Author(s):  
Jia Wang ◽  
Jun Chen ◽  
Lei Zhao ◽  
Paul Cuff ◽  
Haim Permuter
Keyword(s):  
Multiple Description Coding ◽  
Scalable Coding ◽  
Multiple Description ◽  
Description Coding

A resource-based view of quantum information

2004 ◽  
Vol 4 (6&7) ◽  
pp. 460-466
Author(s):  
C.H. Bennett
Keyword(s):  
Quantum Information ◽  
Source Coding ◽  
Adequate Description ◽  
Tripartite Entanglement ◽  
Classical Communication ◽  
Resource Based View ◽  
Open Questions ◽  
Classical Information Theory

We survey progress in understanding quantum information in terms of equivalences, reducibilities, and asymptotically achievable rates for transformations among nonlocal resources such as classical communication, entanglement, and particular quantum states or channels. In some areas, eg source coding, there are straightforward parallels to classical information theory; in others eg entanglement-assisted communication, new effects and tradeoffs appear that are beginning to be fairly well understood, or the remaining uncertainty has become focussed on a few simple open questions, such as conjectured additivity of the Holevo capacity. In still other areas, e.g. the role of the back communication and the classification of tripartite entanglement, much remains unknown, and it appears unlikely that an adequate description exists in terms of a finite number of resources.

Chikungunya Virus: Role of Vectors in Emergence from Enzootic Cycles

2020 ◽  
Vol 65 (1) ◽  
pp. 313-332 ◽  
Author(s):  
Scott C. Weaver ◽  
Rubing Chen ◽  
Mawlouth Diallo
Keyword(s):  
Point Source ◽  
Chikungunya Virus ◽  
Nonhuman Primates ◽  
Transmission Efficiency ◽  
Epidemiologic Studies ◽  
Founder Effects ◽  
Mosquito Vectors ◽  
Epistatic Interactions ◽  
Geographic Expansion

Chikungunya virus (CHIKV), a re-emerging mosquito-borne arbovirus, has caused millions of cases of severe, often chronic arthralgia during recent outbreaks. In Africa, circulation in sylvatic, enzootic cycles involves several species of arboreal mosquito vectors that transmit among diverse nonhuman primates and possibly other amplifying hosts. Most disease occurs when CHIKV emerges into a human-amplified cycle involving Aedes aegypti and sometimes Aedes albopictus transmission and extensive spread via travelers. Epidemiologic studies suggest that the transition from enzootic to epidemic cycles begins when people are infected via spillover in forests. However, efficient human amplification likely only ensues far from enzootic habitats where peridomestic vector and human densities are adequate. Recent outbreaks have been enhanced by mutations that adapt CHIKV for more efficient infection of Ae. albopictus, allowing for geographic expansion. However, epistatic interactions, sometimes resulting from founder effects following point-source human introductions, have profound effects on transmission efficiency, making CHIKV emergence somewhat unpredictable.

Lossy source coding of multiple Gaussian sources: m-helper problem

2005 ◽  
Author(s):  
A. Pandya ◽  
A. Kansal ◽  
G. Pottie ◽  
M. Srivastava
Keyword(s):  
Source Coding ◽  
Gaussian Sources
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