Filters








55,988 Hits in 4.6 sec

Maximum entropy lighting for physical objects

Thomas Malzbender, Erik Ordentlich, Robert F. Erbacher, Jonathan C. Roberts, Matti T. Gröhn, Katy Börner
2006 Visualization and Data Analysis 2006  
Support for this project was provided by Fred Kitson, Mobile and Media Systems Lab.  ...  Acknowledgements Thanks to Dan Gelb for collecting several of the reflectance functions shown in Figures 1,2 , and 3.  ...  Here we present methods for choosing informative lighting directions to view real-world physical objects or scenes.  ... 
doi:10.1117/12.640456 dblp:conf/vda/MalzbenderO06 fatcat:7uqlc2rzzbcexlhdshw4uoo3ma

Curved Gravitation based on Entropy, Black Holes and Limited Measurement Possibilities

Mark Titleman
2018 New Horizons in Mathematical Physics  
for theories such as MOND.  ...  This has important consequences such as increasing the speed limit of light in the universe to 1.14c within a black hole, applying parsimonious explanations of dark matter and dark energy, and accounting  ...  For every second light travels, one can imagine an object travelling 0.819/second.  ... 
doi:10.22606/nhmp.2018.22002 fatcat:e24x2okxqfdd3fqstb7sinsqnu

Maximum Shannon Information Delivered in a Lecture

L. Alksne, A. Ozols
2022 Latvian Journal of Physics and Technical Sciences  
Maximum Shannon information characteristics (entropies of sound and light frames, amounts of total acoustical and optical information, capacities of sound and light sub-channels, total amount of information  ...  physical considerations taken into account for the first time, to our knowledge.  ...  It can be also applied for the calculation of syntactic optical and acoustical information characteristics of any object in the world, e.g., landscapes and streets with people, cosmic objects, etc.  ... 
doi:10.2478/lpts-2022-0008 fatcat:n6m33icycnapjpry6iq5mec4zm

Physical Asymmetries and Brightness Perception [chapter]

James J. Clark
2010 Advances in Intelligent and Soft Computing  
A number of physical asymmetries are seen to permit determination of brightness that is invariant to certain manipulations of the sensor responses, such as inversion.  ...  In particular, the light-dark range asymmetry is examined and is shown to result, over a certain range, in increased variability of sensor responses as scene brightness increases.  ...  This maximum value will depend on the sensitivity of the sensor, σ , the maximum albedo of the object, and the illuminance L of the object surface.  ... 
doi:10.1007/978-3-642-16259-6_6 fatcat:gtqmff7e2ndfhdqnj7hs44fyiu

Operational view of the holographic information bound

Karel Van Acoleyen
2010 Physical Review D  
We study the covariant holographic entropy bound from an operational standpoint. Therefore we consider the physical limit for observations on a light-sheet.  ...  From this relation we can argue a local operational version of the (generalized) covariant entropy bound: the maximum number of bits decoded on a light-sheet interval goes like the area difference (in  ...  And also the stronger bound seems to hold for physical systems. There were some presupposed counterexamples for short light-sheet intervals [3] .  ... 
doi:10.1103/physrevd.82.124028 fatcat:q4olpmvbb5g2papr4bbng5g3da

Maximum entropy based non-negative optoacoustic tomographic image reconstruction

Jaya Prakash, Subhamoy Mandal, Daniel Razansky, Vasilis Ntziachristos
2019 IEEE Transactions on Biomedical Engineering  
Optoacoustic (photoacoustic) tomography is aimed at reconstructing maps of the initial pressure rise induced by the absorption of light pulses in tissue.  ...  . of Non-Negative Pixels Sharpness Metric L2-norm Non- Negativity Maximum Entropy L2-norm Non- Negativity Maximum Entropy Star Phantom 11963 16890 0.0075 0.0125 Brain 7587 10741  ...  The regularization parameter was set to 10 in all the maximum entropy based reconstructions.  ... 
doi:10.1109/tbme.2019.2892842 pmid:30640596 fatcat:3p2xlaezhrgvtjbm27f7cu7wlq

Virtual Reality in the World of Holograms [article]

Michal Fabinger
2001 arXiv   pre-print
This bound should hold even for regions where the coarse-grained entropy exceeds the surface area. We find that Bousso's bound gives strong support for this conjecture.  ...  If we assume that the initial conditions for the universe were such that there was no volume-extensive entropy 'at the beginning of time' (which is true in Linde's chaotic inflation), we can formulate  ...  From the point of view of the holographic principle, we should not be interested in the maximum possible coarsegrained entropy, but in the maximum fine-grained entropy.  ... 
arXiv:hep-th/0104111v1 fatcat:pwohtelt3nbqjovoe344szdk5y

A Fundamentally Irreversible World as an Opportunity towards a Consistent Understanding of Quantum and Cosmological Contexts

Helmut Tributsch
2016 Journal of Modern Physics  
Self-organized processes approach maximum entropy production within their constraints.  ...  For this reason, and for a compensation of entropy in the spread out energy of the wave, the duality of particle and wave has to be mediated via an information self-image of matter.  ...  Here, a maximum entropy production is to be expected.  ... 
doi:10.4236/jmp.2016.712133 fatcat:ipbo63ikuzgmhf4gknxcar5ctu

Automatic image de-weathering using physical model and maximum entropy

Xin Wang, Zhenmin Tang
2008 2008 IEEE Conference on Cybernetics and Intelligent Systems  
In this paper, we propose an automatic method based on physical model and maximum entropy to remove weather effects using only a single image.  ...  At last, to overcome the defect of a single image lacking exact atmospheric information, we propose an algorithm based on maximum entropy to select the optimal scattering coefficient of the atmosphere.  ...  In this work, we present an automatic algorithm based on physical model and maximum entropy theory to deweather a single image.  ... 
doi:10.1109/iccis.2008.4670921 fatcat:ofmoo3yc4fdctg7vemznd4bloe

Stephen Hawking: Black Holes and other Contributions from one of the Greatest Scientists of Our Time

MACETI Huemerson, LEVADA Celso Luis, LAUTENSCHLEGUER Ivan José, CASTRO Wadley Calegaro de, VIDAL Tabata
2018 International Journal of Advanced Engineering Research and Science  
The black hole entropy is also the maximum entropy that can be inserted within a fixed volume.  ...  The term "black" is used exactly because the object does not emit light.  ...  We still need a lot of mathematics, physics and astronomy to understand the reality that is associated with black holes.  ... 
doi:10.22161/ijaers.5.5.8 fatcat:eraaoxmfovghtgcn5yszvave74

TH-C-350-06: Laser-To-Proton Energy Transfer Efficiency in Laser-Plasma Interactions

E Fourkal, I Veltchev, C Ma
2008 Medical Physics (Lancaster)  
From a thermodynamic point of view, the splitting procedure can be viewed as an effective way of increasing the efficiency of energy transfer from the laser light to protons, which peaks for processes  ...  having the least amount of entropy gain.  ...  Pshenichka for introducing us to the perfect heat exchange problem as well as stimulating discussions.  ... 
doi:10.1118/1.2962831 fatcat:scbktnyakfewllwlkegsyjsowe

The Structure of the Broad Emission Line Region as Shown by Variability Monitoring

Julian H. Krolik
1994 Symposium - International astronomical union  
The various methods used to infer the physical conditions and location of the material responsible for broad line emission in AGN are reviewed.  ...  This method is then applied to published data from the 1989 IUE campaign on NGC 5548, and the results found contrasted with those obtained by the previous standard method, maximum entropy.  ...  The reason for this discrepancy between the two methods is partly that the χ 2 for some of the individual light curves found by maximum entropy is, in fact, rather large, and partly that the maximum entropy  ... 
doi:10.1017/s0074180900174960 fatcat:ioimri6m4jeo5dcsu7fslvhtgy

Laser-to-proton energy transfer efficiency in laser–plasma interactions

E. FOURKAL, I. VELTCHEV, C.-M. MA
2008 Journal of Plasma Physics  
From a thermodynamic point of view, the splitting procedure can be viewed as an effective way of increasing the efficiency of energy transfer from the laser light to protons, which peaks for processes  ...  having the least amount of entropy gain.  ...  Pshenichka for introducing us to the perfect heat exchange problem. EF would also like to thank A. Smolyakov for stimulating discussions.  ... 
doi:10.1017/s0022377808007460 fatcat:hknbq6ad45hhpigsjd7izc4j7m

Understanding visual complexity with statistical physics

Alex Striff
2020 Zenodo  
Taken together, these different perspectives form a framework for understanding visual complexity in a variety of images.  ...  Different perspectives for understanding why natural images have low visual complexity have wide applications in fields like computer vision and image compression.  ...  This connection between information theory and statistical physics was developed by E. T. Jaynes to produce the maximum entropy principle (MaxEnt) [2] .  ... 
doi:10.5281/zenodo.3987482 fatcat:sif7nmvyqjahhjmorcppjmr5ti

An Improved Ray Casting Algorithm Based on 2D Maximum Entropy Threshold Segmentation

Hou Huiling, Wang Mingquan, Ren Shaoqing
2012 Journal of Convergence Information Technology  
In the course of ray casting volume rendering, an algorithm of ICT slice images original data field 2D maximum entropy threshold segmentation prior preprocessing is proposed.  ...  The 2-D maximum entropy is to choose the threshold vector as ( , ) S T , and divides the image into the object part A and background part B.  ...  In order to get better rendering effects, the need of the great amount of light projection data and the need to sampling many times for every light, have greatly affected rendering speed.  ... 
doi:10.4156/jcit.vol7.issue17.28 fatcat:55cjbeirorbhxage6wzejgm56m
« Previous Showing results 1 — 15 out of 55,988 results