185 Hits in 8.6 sec

A Perceptually Relevant No-Reference Blockiness Metric Based on Local Image Characteristics

Hantao Liu, Ingrid Heynderickx
2009 EURASIP Journal on Advances in Signal Processing  
The performance of this metric is compared to existing alternatives in literature and shows to be highly consistent with subjective data at a reduced computational load.  ...  The overall computation efficiency and metric accuracy is further improved by including a grid detector to identify the exact location of blocking artifacts in a given image.  ...  The human vision model proposed in Section 2.3 aims at removing the perceptually insignificant components due to visual masking.  ... 
doi:10.1155/2009/263540 fatcat:xjba2ca3q5brri5rdxnggl35yq

Computer vision techniques for PDA accessibility of in-house video surveillance

Rita Cucchiara, Costantino Grana, Andrea Prati, Roberto Vezzani
2003 First ACM SIGMM international workshop on Video surveillance - IWVS '03  
In this paper we propose an approach to indoor environment surveillance and, in particular, to people behaviour control in home automation context.  ...  Finally, the system is equipped with a specifically designed transcoding server to adapt the video content to PDA requirements (display area and bandwidth) and to the user's requests.  ...  The project is founded by Fondazione Cassa di Risparmio, Modena, Italy and the FIRB Italian Project on Performance Analysis.  ... 
doi:10.1145/982452.982464 fatcat:4fln6p2srbbyxa4qa2q6efyufq

Perceptual depth compression for stereo applications

Dawid Pająk, Robert Herzog, Radosław Mantiuk, Piotr Didyk, Elmar Eisemann, Karol Myszkowski, Kari Pulli
2014 Computer graphics forum (Print)  
Our solution is a natural extension to the H.264 codec and can easily be integrated into existing decoders.  ...  In contrast to previous methods, we account for disparity masking, and model a distinct relation between depth perception and contrast in luminance.  ...  Acknowledgements: The work was in part supported by EU FP7 project Harvest4D and the Dutch Kennis voor Klimaat (KvK) program.  ... 
doi:10.1111/cgf.12293 fatcat:thypuroyprbi5k4tdfvm4eom2y

Motor-commands decoding using peripheral nerve signals: a review

Keum-Shik Hong, Nida Aziz, Usman Ghafoor
2018 Journal of Neural Engineering  
We also discuss the types of interfaces available and their applications, the kinds of peripheral nerve signals that are used, and the algorithms used to decode them.  ...  The peripheral nerves provide access to highly processed and segregated neural command signals from the brain that can in principle be used to determine user intent and control muscles.  ...  Acknowledgment This work was supported by the National Research Foun dation (NRF) of Korea under the auspices of the Ministry of Science and ICT, Republic of Korea (grant nos.  ... 
doi:10.1088/1741-2552/aab383 pmid:29498358 fatcat:uvh3wcjb3jc4vbce6hi2nrhdiq

Unconscious reinforcement learning of hidden brain states supported by confidence

Aurelio Cortese, Hakwan Lau, Mitsuo Kawato
2020 Nature Communications  
Computational modelling and multivariate analyses identify a frontostriatal neural mechanism by which the brain may untangle the 'curse of dimensionality': synchronization of confidence representations  ...  Can humans be trained to make strategic use of latent representations in their own brains?  ...  Code availability Custom code used to generate the figures and results of this paper is freely available within a stand-alone computing capsule at Code Ocean [], with  ... 
doi:10.1038/s41467-020-17828-8 pmid:32868772 fatcat:i36zuoozb5eelbxhg3m37krg4e

39th European Conference on Visual Perception (ECVP) 2016 Barcelona

2016 Perception  
Our perceptual system has to rely on concepts from perceptual memory in order to disambiguate the sensory information and to create stable and reliable percepts.  ...  In that way, the regression approach allows to model both the encoding or the decoding process using machine learning techniques.  ...  This is a shading pattern on the body that compensates for directional illumination: being darker on the side exposed to a higher light intensity (typically, a dark back and a light belly).  ... 
doi:10.1177/0301006616671273 fatcat:el2dmsuk6zd25pedijucuexl5m

Sculpting New Visual Concepts into the Human Brain [article]

Marius Cătălin Iordan, Victoria J.H. Ritvo, Kenneth A. Norman, Nicholas B Turk-Browne, Jonathan D. Cohen
2020 bioRxiv   pre-print
The ability to sculpt new conceptual distinctions in the human brain, applied here to perception, has broad relevance to other domains of cognition such as decision-making, memory, and motor control.  ...  We used a non-invasive technique (closed-loop real-time functional magnetic resonance imaging) to create novel categories of visual objects in the brain.  ...  sufficient to influence in order to induce perceptual change.  ... 
doi:10.1101/2020.10.14.339853 fatcat:73g75grsqbe5regr4dzjpgmgdm

Machine Learning Of Musical Gestures

Baptiste Caramiaux, Atau Tanaka
2013 Zenodo  
We then present a review of the literature in current NIMEresearch that uses ML in musical gesture analysis and gestural sound control.We describe the ways in which machine learning is useful for creatingexpressive  ...  We firstgive to the non-specialist reader an introduction to two ML tasks,classification and regression, that are particularly relevant for gesturalinteraction.  ...  [2] use Hidden Markov Models (HMM) to propose a template-based method that continuously recognizes gesture in realtime as a multivariate time series.  ... 
doi:10.5281/zenodo.1178489 fatcat:3axprilmlvcdzlbrxcmr7zwdti

Cognitive workload modulation through degraded visual stimuli: a single-trial EEG study

K Yu, I Prasad, H Mir, N Thakor, H Al-Nashash
2015 Journal of Neural Engineering  
Whether and how a simple change in a sensory input, such as vision, modulates the cognitive processes, needs to be studied.  ...  Using the spatial projections and temporal projections together, the oscillatory signals and ERPs can be naturally combined, rather than separately handled, in order to study the multi-level workload classification  ... 
doi:10.1088/1741-2560/12/4/046020 pmid:26065874 fatcat:rhfrhdlczneylkjes6cpnuj3b4

International Conference on Image Processing

1996 Proceedings of 3rd IEEE International Conference on Image Processing  
ISBrj 0 -7 8 0 3 -3 2 5 9 -8 ( c a s e b o u n d ) I S B N 3 -7 8 0 3 -3 2 6 0 -1 ( m i c r o f i c h e ) L i b r a r yof C o n g r e s s : 9 6 -7 5 5 5 7 I S B N 0 -7 8 0 3 -3 2 5 8 -x ~~f t b o u~d )  ...  projection 309 A new framework for the formation of invariants and multiple-view constraints in computer vision 313 Projective invariants and the correspondence problem 317 Learning to recognize  ...  adaptive filter for the removal of blocking artifacts in image sequences coded at very low bitrate A Bayesian approach to error concealment in encoded video streams A projection-based post-processing  ... 
doi:10.1109/icip.1996.560353 fatcat:le3ysy6wxrfr7nq56ueropy7tu

Perceptual and interpretative properties of motion for information visualization

Lyn Bartram
1997 Proceedings of the 1997 workshop on New paradigms in information visualization and manipulation - NPIV '97  
Implementation issues are discussed with respect to realtime display requirements. Perceptual and Interpretative Properties of Motion for Information Visualization 2  ...  the human's perceptual capacity to efficiently interpret them.  ...  There is little "perceptual room" left in the standard set of representations to support higher-order gestalt perceptions of system function and state.  ... 
doi:10.1145/275519.275520 dblp:conf/cikm/Bartram97 fatcat:zblwdsaedjdxzasghlcshqqdgq

In the Eye of the Beholder: A Survey of Models for Eyes and Gaze

D.W. Hansen, Qiang Ji
2010 IEEE Transactions on Pattern Analysis and Machine Intelligence  
This paper reviews current progress and state of the art in video-based eye detection and tracking in order to identify promising techniques as well as issues to be further addressed.  ...  of interest to many other domains problems in computer vision and beyond.  ...  In order to account for the nonlinear displacements of the projected glints on the cornea, they learn four i parameters, initially asking the user to look at the light sources.  ... 
doi:10.1109/tpami.2009.30 pmid:20075473 fatcat:w6pnmvmvung7fnxegz3e66wcvq

Embedded System for Biometric Identification [chapter]

Ahmad Nasir Che Rosli
2010 Robot Vision  
Hence, where is the biometric template corresponding to identity I k , and t is a predefined threshold.  ...  In order to facilitate matching, the input digital representation is further processed by a feature extractor to generate a compact but expressive representation called a template.  ...  The purpose of robot vision is to enable robots to perceive the external world in order to perform a large range of tasks such as navigation, visual servoing for object tracking and manipulation, object  ... 
doi:10.5772/9296 fatcat:cvccm7mccbfuxodokyrzp2l2vy

Panoptic Studio: A Massively Multiview System for Social Interaction Capture [article]

Hanbyul Joo, Tomas Simon, Xulong Li, Hao Liu, Lei Tan, Lin Gui, Sean Banerjee, Timothy Godisart, Bart Nabbe, Iain Matthews, Takeo Kanade, Shohei Nobuhara (+1 others)
2016 arXiv   pre-print
We present an approach to capture the 3D motion of a group of people engaged in a social interaction.  ...  Our algorithm is designed to fuse the "weak" perceptual processes in the large number of views by progressively generating skeletal proposals from low-level appearance cues, and a framework for temporal  ...  Although the 3D template-based method shows good performance-and has become a standard in markerless motion capture approaches-the requirement of a high quality 3D template for each individual limits the  ... 
arXiv:1612.03153v1 fatcat:padv2rv7tvbfjpgy4q5asm6yui

Audio-visual integration in multimodal communication

Tsuhan Chen, R.R. Rao
1998 Proceedings of the IEEE  
We also study the enabling technologies for these research topics, including automatic facial-feature tracking and audio-to-visual mapping.  ...  The topics include bimodality in human speech, human and automated lip reading, facial animation, lip synchronization, joint audiovideo coding, and bimodal speaker verification.  ...  ACKNOWLEDGMENT The authors wish to thank Prof. A. M. Tekalp for handling the review process of this paper.  ... 
doi:10.1109/5.664274 fatcat:2wpoj4xcdvbcbddcwttx6cn27q
« Previous Showing results 1 — 15 out of 185 results