Use of Artificial Light Texture for non-contact real-time monitoring of respiration and heart rates Alexander Misharin LVE Technologies LLC North Wales, PA, USA

Three key components of the Artificial Light Texture (ALT) technology (patent pending) are:

A computer A video camera An ALT-generating light source

•  The ALT technology allows obtaining heart rate and respiration rate information for a person as well as information about other mechanical motions of the person’s body in a non-contact fashion and in real time.

•  Skin does not need to be exposed, body can be covered by clothes or a blanket. The ALT technology does not use or generate three-dimensional data related to any element of a scene.

•  The ALT technology uses inexpensive computing and image capture devices such as Raspberry Pi single-board computer [1] and Pi NoIR camera [2] and is compatible with light emitting elements of many consumer electronics devices such as infrared emitters of standalone or embedded depth sensing devices like Microsoft Kinect and Intel RealSense cameras. An optical band pass filter which matches wavelengths of an ALT light source can be used with Pi NoIR camera to reduce effects of the ambient light variation. 

The next slide shows an example of heart rate and respiration rate data obtained using an ALT system consisting of a Raspberry Pi single-board computer, a Pi NoIR camera, and a Microsoft Kinect for Xbox 360.

The ALT technology is well suited for monitoring heart rate, respiration, and general motion of sleeping persons. We will also explore other possible application areas for the ALT technology ranging from respiration and pulse gating for medical imaging, to ‘watchdog’-like applications for monitoring of people with epilepsy, to non-contact heart rate and respiration rate monitoring during yoga exercises, and beyond.

Connect with us on LinkedIn [3] if you have questions about the ALT technology or have a possible collaboration in mind. 1. https://www.raspberrypi.org/ 2. https://www.raspberrypi.org/products/pi-noir-camera-v2/ 3. https://www.linkedin.com/in/alexmisharin © 2016 LVE Technologies LLC

1 (2)

-85000

-65000

-45000

-25000

-5000

15000

35000

55000

75000 1 respiration cycle (inhale/exhale)

with overlaid heart beat pattern

Heart beat pattern only (breath hold)

2048 data points range (42 seconds long data acquisition time) (a.u.)

Real-time data collection at 49 data points per second rate with simultaneous HD video (720p) recording.

A person was at 1.5 meters (5 feet) distance from the camera. The camera observed 2/3 of the person's body.

Determined rates:

Respiration rate: 0.24 Hz or 14 respiration cycles per minute.

Heart rate: 1.12 Hz or 67 heartbeats per minute. 0.00E+00

5.00E+13

1.00E+14

1.50E+14

2.00E+14

2.50E+14

0 0.717773438 1.435546875 2.153320313 2.87109375

Respiration rate

Heart rate

Hz

(a.u.)

© 2016 LVE Technologies LLC 2 (2)

FFT