Apparatus of non-touch optical detection of vital signs on skin from multiple filters

• US 9,406,125 B2
• Filed: 08/11/2014
• Issued: 08/02/2016
• Est. Priority Date: 07/04/2014
• Status: Active Grant

• Current Assignee: ARC Devices, Ltd.
• Original Assignee: Arc Devices (Ni) Limited
• Inventors: Barret, John, Gerst, Steven, Khachaturian, Mark, Smith, Michael G., Crawley, Martin, Cronin, Michael, Turnbull, Derek, Gross, Irwin
• Primary Examiner(s): NAKHJAVAN, SHERVIN K
• Application Number:
  US14/457,041
• Publication Number:
  US 20160000377A1
• Time in Patent Office: 722 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 2560/0475 Special features of memory means, e.g. removable memory cards
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• CPC Class Codes: A61B 5/0008 Temperature signals
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• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/0064 Body surface scanning
• CPC Class Codes: A61B 5/0075 by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy A61B5/0071 takes precedence
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/015 By temperature mapping of body part
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02433 for infrared radiation
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 : Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/33 : specially adapted for cooperation with other devices
• CPC Class Codes: A61B 5/441 : Skin evaluation, e.g. for skin disorder diagnosis
• CPC Class Codes: A61B 5/6898 : Portable consumer electronic devices, e.g. music players, telephones, tablet computers
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• CPC Class Codes: A61B 5/725 : using specific filters therefor, e.g. Kalman or adaptive filters A61B5/316 take precedence
• CPC Class Codes: A61B 5/7257 : using Fourier transforms
• CPC Class Codes: A61B 5/7264 : Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A61B 5/7267 : involving training the classification device
• CPC Class Codes: A61B 5/7275 : Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
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• CPC Class Codes: G01J 2005/0077 : Imaging
• CPC Class Codes: G01J 5/0025 : Living bodies ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: G01J 5/025 : Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/0893 : Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path G01J5/049 takes precedence
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• CPC Class Codes: G06F 3/042 : by opto-electronic means
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• CPC Class Codes: G06T 2207/30088 : Skin; Dermal
• CPC Class Codes: G06T 2207/30104 : Vascular flow; Blood flow; Perfusion
• CPC Class Codes: G06T 2207/30201 : Face
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• CPC Class Codes: G06V 30/413 : Classification of content, e.g. text, photographs or tables
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Abstract

An apparatus of motion amplification to communicate biological vital signs includes a first frequency filter that applies a frequency filter to at least two images, a regional facial clusterial module that is coupled to the first frequency filter and that applies spatial clustering to output of the first frequency filter, a second frequency filter that is coupled to the regional facial clusterial module and that is applied to output of the regional facial clusterial module, thus generating a temporal variation, a vital-sign generator that is coupled to the second frequency filter that generates at least one vital sign from the temporal variation, and a display device that is coupled to the vital-sign generator that displays the at least one vital sign.

Claims

1. An apparatus of motion amplification to communicate biological vital signs, the apparatus comprising:

a skin-pixel-identifier that identifies pixel values that are representative of the skin in at least two images;

a first frequency filter that is operably coupled to the skin-pixel-identifier and that applies a frequency filter to output of the skin-pixel-identifier;

a spatial clusterer that is operably coupled to the first frequency filter and that applies spatial clustering to the output of the first frequency filter;

a weighted bandpass frequency filter that is operably coupled to the spatial clusterer and that is applied to output of the spatial clusterer, generating a temporal variation;

a vital-sign generator that is operably coupled to the weighted bandpass frequency filter that generates at least one vital sign from the temporal variation; and

a display device that is operably coupled to the vital-sign generator that is operable to display the at least one vital sign.

2. The apparatus of claim 1, wherein the first frequency filter further comprises:

a high pass filter.

3. The apparatus of claim 1, wherein the first frequency filter further comprises:

a low pass filter.

4. The apparatus of claim 1, wherein the first frequency filter further comprises:

a bandpass filter.

5. The apparatus of claim 1, wherein the first frequency filter further comprises:

a weighted bandpass filter.

6. The apparatus of claim 1, wherein the first frequency filter further comprises:

a Gaussian filter.

7. The apparatus of claim 1 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to store the at least one vital sign in a volatile memory.

8. The apparatus of claim 1 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to store the at least one vital sign in a non-volatile memory.

9. The apparatus of claim 1 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to transmit the at least one vital sign to another apparatus.

10. An apparatus of motion amplification to communicate biological vital signs, the apparatus comprising:

a first frequency filter that applies a frequency filter to at least two images;

a regional facial clusterial module that is operably coupled to the first frequency filter and that applies spatial clustering to output of the first frequency filter;

a weighted bandpass frequency filter that is operably coupled to the regional facial clusterial module and that is applied to output of the regional facial clusterial module, generating a temporal variation;

a vital-sign generator that is operably coupled to the weighted bandpass frequency filter that generates at least one vital sign from the temporal variation; and

a display device that is operably coupled to the vital-sign generator that is operable to display the at least one vital sign.

11. The apparatus of claim 10 further comprising:

a skin-pixel-identifier that is operably coupled to the first frequency filter that identifies pixel values that are representative of skin in the at least two images.

12. The apparatus of claim 10, wherein the first frequency filter further comprises:

a one-dimensional spatial Fourier Transformation apparatus.

13. The apparatus of claim 10, wherein the first frequency filter further comprises:

a high pass filter.

14. The apparatus of claim 10, wherein the first frequency filter further comprises:

a low pass filter.

15. The apparatus of claim 10, wherein the first frequency filter further comprises:

a bandpass filter.

16. The apparatus of claim 10, wherein the first frequency filter further comprises:

a weighted bandpass filter.

17. The apparatus of claim 10, wherein the first frequency filter further comprises:

a Gaussian filter.

18. The apparatus of claim 10 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to store the at least one vital sign in a non-volatile memory.

19. The apparatus of claim 10 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to store the at least one vital sign in a volatile memory.

20. The apparatus of claim 10 further comprising:

a storage device that is operably coupled to the vital-sign generator and that is operable to transmit the at least one vital sign to another apparatus.