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System and method for extracting physiological information from video sequences

A technology of physiological information and signal segments, applied in the field of extraction of physiological related information, can solve problems such as difficulty in obtaining meaningful physiological measurement results and low signal-to-noise ratio

Pending Publication Date: 2019-12-20
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the signal-to-noise ratio is small, and it may be difficult to obtain meaningful physiological measurements

Method used

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  • System and method for extracting physiological information from video sequences
  • System and method for extracting physiological information from video sequences
  • System and method for extracting physiological information from video sequences

Examples

Experimental program
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Embodiment Construction

[0032] In the following description, the same reference numerals denote the same elements.

[0033] figure 1 Indicates the settings for measuring the physiological process of Subject 1 and extracting physiological information or vital signs. A light source 2 (which may be artificial or natural) illuminates the object 1 . The camera 3 records a sequence of video frames and feeds them to a processing unit (PA) 4 which extracts vital signs and in turn provides output to a display 5 . The display 5 can display only the physiological information from the signal analysis unit 4 alone or in combination with a video sequence.

[0034] figure 2 represents a processing chain 20 according to an embodiment configured to extract physiological information. The processing chain 40 can conveniently be realized as part of the processing device 4 . The input (IP) 21 receives a video sequence and passes the frames of the video sequence to a segment selection unit 22 (ROI) which selects seg...

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PUM

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Abstract

There is provided a method of extracting a physiological information which comprises, for a defined time-period, extracting a plurality of signal segments in a time-domain form, selecting a subset ofthe plurality of signal segments according their maximum signal level, converting at least said subset to produce a plurality of transformed signal segments, and combining the at least said subset ofthe plurality of transformed signal segments to produce a combined signal segment. This has the advantage of reducing the influence of motion and or illumination-induced changes on the final result byremoving parts of the raw signal segments which are worst affected by these.

Description

technical field [0001] The present invention relates to the extraction of information from video sequences, and in particular to the extraction of physiologically relevant information (commonly referred to as vital signs). Background technique [0002] A video sequence of a living subject can be analyzed and detect subtle changes in the images as a result of the subject's physiological processes. These physiological processes include blood flow, breathing and sweating. [0003] Specific physiological processes can be observed through changes in skin reflexes. Human skin can be modeled as an object with at least two layers, one of which is the epidermis (thin superficial layer) and the other is the dermis (the thicker layer below the epidermis). A specific percentage of 5% of incident light is reflected on the skin surface. The remaining light is scattered and absorbed within the two skin layers, a phenomenon called body reflection (described in the dichroic reflection mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024A61B5/00G06K9/00A61B5/1455A61B5/1171A61B5/08
CPCA61B5/7207A61B5/7246A61B5/0077A61B5/02416A61B5/0816A61B5/1176A61B5/1455A61B5/725A61B2576/00A61B5/7257G16H30/40G06V40/171G06V40/15G06F2218/16G06V20/46
Inventor A·C·登布林克尔M·布卢特V·让娜M·J·A·阿塞尔曼G·M·克斯滕
Owner KONINKLJIJKE PHILIPS NV