Non-touch optical detection of vital sign from amplified visual variations

• US 9,691,146 B2
• Filed: 08/11/2014
• Issued: 06/27/2017
• Est. Priority Date: 07/04/2014
• Status: Active Grant

• Current Assignee: ARC Devices, Ltd.
• Original Assignee: Arc Devices (Ni) Limited
• Inventors: Khachaturian, Mark, Smith, Michael G.
• Primary Examiner(s): Chu, Randolph I
• Application Number:
  US14/457,053
• Publication Number:
  US 20160000327A1
• Time in Patent Office: 1,051 Days
• Field of Search: None
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Abstract

A microprocessor is operably coupled to a camera from which patient vital signs are determined. A temporal-variation-amplifier of at least two images is operable to generate a temporal variation, a vital-sign generator is operable to generate at least one vital sign from the temporal variation and a display device is operable to display 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 spatial bandpass filter that is operably coupled to the skin-pixel-identifier and that processes output of the skin-pixel-identifier;

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

a temporal bandpass filter that is operably to the regional facial clusterial module and that is applied to output of the regional facial clusterial module;

a temporal-variation identifier that is operably coupled to the temporal bandpass filter and that identifies temporal variation of the output of the temporal bandpass filter;

a vital-sign generator that is operably coupled to the temporal-variation identifier 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 skin-pixel-identifier further comprises:

an automatic seed point based clustering apparatus.

3. The apparatus of claim 1, wherein the regional facial clusterial module further comprises:

a fuzzy clusterer.

4. The apparatus of claim 1, wherein the spatial bandpass filter further comprises:

a one-dimensional spatial Fourier Transformation apparatus.

5. The apparatus of claim 1, wherein the spatial bandpass filter further comprises:

a high pass filter.

6. The apparatus of claim 1, wherein the spatial bandpass filter further comprises:

a low pass filter.

7. The apparatus of claim 1, wherein the spatial bandpass filter further comprises:

a weighted spatial bandpass filter.

8. The apparatus of claim 1, wherein the spatial bandpass filter further comprises:

a Gaussian filter.

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 store the at least one vital sign in a volatile memory.

10. 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.

11. 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.

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

a temporal-variation-amplifier of at least two images that is operable to generate a temporal variation;

a vital-sign generator that is operably coupled to the temporal-variation-amplifier that is operable to generate 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,

wherein the temporal-variation-amplifier further comprises;

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

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

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

13. The apparatus of claim 12, wherein the temporal-variation-amplifier further comprises:

a second frequency filter that is operably regional facial clusterial module and that is applied to output of the regional facial clusterial module, generating the temporal variation.

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

a one-dimensional spatial Fourier Transformation apparatus.

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

a high pass filter.

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

a low pass filter.

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

a bandpass filter.

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

a Gaussian filter.

19. The apparatus of claim 12 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 12 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.