Patent
Method of controlling a function of a device and system for detecting the presence of a living being
Giovanni Cennini,Vincent Jeanne +1 more
TLDR
In this article, a method of controlling a function of a device, including obtaining a sequence (19,34,48) of digital images taken at consecutive points in time, is presented.Abstract:
A method of controlling a function of a device, includes obtaining a sequence (19;34;48) of digital images taken at consecutive points in time. At least one measurement zone (25) including a plurality of image points is selected. For at least one measurement zone (25), a signal (30;41;55) representative of at least variations in a time- varying value of a combination of pixel values at at least a number of the image points is obtained and at least one characteristic of the signal (30;41;55) within at least a range of interest of its spectrum relative to comparison data is determined. The determination comprises at least one of: (i) determining whether the signal (30;41;55) has a spectrum with a local maximum at a frequency matching a comparison frequency to a certain accuracy; and (ii) determining whether at least a certain frequency component of the signal (30;41;55) is in phase with a comparison signal to a certain accuracy. The function is controlled in dependence on whether the determination is positive.read more
Citations
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Journal ArticleDOI
Non-contact video-based vital sign monitoring using ambient light and auto-regressive models
Lionel Tarassenko,Mauricio Villarroel,Alessandro Guazzi,João Jorge,David A. Clifton,Christopher W. Pugh +5 more
TL;DR: This work has devised a novel method of cancelling out aliased frequency components caused by artificial light flicker, using auto-regressive (AR) modelling and pole cancellation, and has been able to construct accurate maps of the spatial distribution of heart rate and respiratory rate information from the coefficients of the AR model.
Proceedings ArticleDOI
Self-Adaptive Matrix Completion for Heart Rate Estimation from Face Videos under Realistic Conditions
TL;DR: This work introduces a strategy to dynamically select face regions useful for robust HR estimation, inspired by recent advances on matrix completion theory, which significantly outperforms state-of-the-art HR estimation methods in naturalistic conditions.
Patent
Remote monitoring of vital signs
TL;DR: In this article, a method of remote monitoring of vital signs by detecting the PPG signal in an image of a subject taken by a video camera such as a webcam was proposed.
Patent
Device and method for determining vital signs of a subject
TL;DR: In this paper, the authors proposed a method for determining vital signs of a subject based on the data signals of skin pixel areas within the skin area, and a post-processor is provided for determining the desired vital sign from said vital sign information signal.
Patent
Methods and systems for measuring dynamic changes in the physiological parameters of a subject
TL;DR: In this article, a series of images of the subject, and processing the images to obtain physiological parameters of interest are presented. But none of these methods can be used to analyze single channel signals, including signals obtained from active night vision cameras.
References
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Proceedings ArticleDOI
Contact-less, Multi-Spectral Imaging of Dermal Perfusion
TL;DR: A variation of the accepted PPG technique is described, to provide a contact-less and non-invasive method of characterizing dermal perfusion, which employs a 3-CCD, multi-spectral camera, to image the selected area.
Patent
Cell culture support and manufacture thereof
Masanao c,Kenichi c +1 more
TL;DR: In this article, a method for manufacturing a cell culture support having a temperature responsive polymer immobilized onto the surface of the substrate via covalent bonding is presented, the method including a coating step in which a composition including a monomer that can form the polymer by polymerization by radiation irradiation, an organic solvent and, in some cases, a prepolymer formed by polymerisation of the monomer is coated onto the substrate having a surface containing a material which can be covalently bonded to the temperature responsive polymeric material.
Patent
System and method to determine awareness
TL;DR: In this paper, a system for measuring the awareness of a subject including an imaging device adapted to acquire data representative of an image of the subject, and an awareness processor connected to the imaging device, wherein the awareness processor is adapted to classify the awareness according to the position of subject.
Patent
System and method for processing an image sequence
TL;DR: In this paper, a method for determining a frequency of motion of an object from a time sequence of images of said object, comprising the steps of applying an autocorrelation function to individual pixels in across said image sequence, computing an average autocorerelation for each image to produce an amplitude pattern of said average autorecorerelation; applying a filter to said amplitude pattern; applying an peak detector to said filtered amplitude; and comparing said peak to its time of occurrence in said image sequences to thereby determine the object motion.
Patent
Motion detector, image processing system, motion detecting method, program, and recording medium
Tomohisa Tagami,Yoshio Seki +1 more
TL;DR: In this paper, a motion detector comprises a small amplitude area detecting means (9) for measuring the amplitudes in an area including and adjoining a predetermined pixel of the image, a motion information extracting means (10), a comparing means (2) for judging from the measured variation at least whether the predetermined pixel is a motion pixel or not, motion image pixel counting means (3) and a motion signal generating means (11) for generating a motion signals related to the predetermined pixels according to the result of the judgment.