Results 11 to 20 of about 500,433 (311)

A quick, reliable, and automated method for fat cell sizing

open access: yesJournal of Lipid Research, 2003
Mean diameters of fat cells from abdominal tissues from 31 volunteers were determined by three methods based on fat cell isolation after collagenase digestion and methylene blue staining.
Yourka D. Tchoukalova   +4 more
doaj   +1 more source

Optic Flow: A History [PDF]

open access: yesi-Perception, 2021
The concept of optic flow, a global pattern of visual motion that is both caused by and signals self-motion, is canonically ascribed to James Gibson's 1950 book “ The Perception of the Visual World.” There have, however, been several other developments of this concept, chiefly by Gwilym Grindley and Edward Calvert. Based on rarely referenced scientific
openaire   +3 more sources

Sensor-Guided Optical Flow [PDF]

open access: yes2021 IEEE/CVF International Conference on Computer Vision (ICCV), 2021
This paper proposes a framework to guide an optical flow network with external cues to achieve superior accuracy either on known or unseen domains. Given the availability of sparse yet accurate optical flow hints from an external source, these are injected to modulate the correlation scores computed by a state-of-the-art optical flow network and guide ...
M. Poggi, F. Aleotti, S. Mattoccia
openaire   +3 more sources

Improvement in detection of presence in forbidden locations in video anomaly using optical flow map [PDF]

open access: yesهوش محاسباتی در مهندسی برق, 2023
Anomaly detection has been in researchers’ scope of study for a long time. The wide variety of anomaly detection use cases ranges from quality control in production lines to providing security in public places.
Mohammad Rahimpour   +3 more
doaj   +1 more source

OpenOpticalFlow: An Open Source Program for Extraction of Velocity Fields from Flow Visualization Images

open access: yesJournal of Open Research Software, 2017
This paper describes OpenOpticalFlow, an open source optical flow program in Matlab for extraction of high-resolution velocity fields from various flow visualization images.
Tianshu Liu
doaj   +1 more source

Detection of Human Movement Direction Using Optical Flow Analisys on Multiple Camera Angles

open access: yesJurnal Nasional Teknik Elektro, 2021
The active movement of children poses a safety risk in the absence of adult supervision. To reduce the risk of accidents in children, an automatic detection system for the direction of children's movements is crucially needed.
Elvira Sukma Wahyuni   +2 more
doaj   +1 more source

Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry [PDF]

open access: yes, 2012
The use of high spatial resolution optical frequency domain reflectometry (OFDR) to facilitate the multiplexing of a serial array of tapered optical fibre sensors is presented.
Tatam, Ralph P.   +3 more
core   +1 more source

TV-L1 Optical Flow Estimation

open access: yesImage Processing On Line, 2013
This article describes an implementation of the optical flow estimation method introduced by Zach, Pock and Bischof in 2007. This method is based on the minimization of a functional containing a data term using the L1 norm and a regularization term using
Javier Sánchez Pérez   +2 more
doaj   +1 more source

An orbital energy flow and a spin flow at the tight focus

open access: yesКомпьютерная оптика, 2021
We have shown that a reverse energy flow (negative projection of the Poynting vector onto the optical axis) at the sharp focus of an optical vortex with topological charge 2 and left-hand circular polarization arises because the axial spin flow has a ...
S.S. Stafeev
doaj   +1 more source

3D Wavelet-Based Optical Flow Estimation [PDF]

open access: yesEngineering and Technology Journal, 2007
In this paper, a new algorithm for accurate optical flow estimation using discretewavelet approximation is proposed. The image sequences are always assumed tobe noiseless in the computation of optical flow, since there is always a method thatcan perform ...
Mutaz. AbdulWahab
doaj   +1 more source

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