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by almi
Tue Nov 06, 2018 3:32 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

Respiration and heartbeats can be monitored for any position of a person. Even when that person is completely hidden under a blanket. You can follow the description of the ALT tech which you can find at https://github.com/lvetech/ALT to build your system provided you comply with the License linked a...
by almi
Wed Mar 21, 2018 3:53 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

A small ALT-based biofeedback demonstration / an ‘artsy’ “Relaxation” installation: https://youtu.be/xgvhUrNapjA The details/explanations are here: https://www.linkedin.com/pulse/non-contact-vital-signs-monitoring-mobile-devices-ipad-misharin/ As mentioned above, ambient light, including incandescen...
by almi
Wed Jan 24, 2018 6:11 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

ALT is “sensitive” to changes in the ambient illumination (the changes, I guess, might be present in an art installation). If you are using using a Kinect for Xbox 360 or an Occipital Structure Sensor ( https://structure.io/ ) as a light source element and a Pi NoIR camera as a camera element for an...
by almi
Wed Jan 24, 2018 4:43 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

... How long does it take to get the first measurement? ... Generally, it depends on the type and the quality of the results you want to obtain. For example, if you want to get a hart rate based on FFT , than your data set better cover at least several heartbeats. The longer your data set the bette...
by almi
Tue Jan 23, 2018 5:26 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

You can make an ALT system using a USB camera provided that the ALT system has a light source element which produces the additional light texture which is captured by the USB camera (the light texture is “visible” to the USB camera). Light spots produced by Kinect for Xbox 360 are “visible” to the P...
by almi
Tue Jan 09, 2018 3:01 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

Please consult the “Picamera” library documentation (http://picamera.readthedocs.io).
E.g. "3.13. Recording to a network stream”:
http://picamera.readthedocs.io/en/relea ... ork-stream

I use Kinect with its own power supply.

good luck!
by almi
Mon Jan 08, 2018 4:08 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

simple-ALT-raw.py is all you need to capture ALT data from the Pi NoIR camera’s video stream. Simple. ) One would also need a light source for ALT. For example, light emitter of any structured light -based depth-sensing camera can be used as such. E.g., Kinect for Xbox 360 can be connected to a Rasp...
by almi
Sun Jan 07, 2018 4:36 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

https://github.com/lvetech/ALT
Note: The license is for the noncommercial use only.
The ALT technology includes both the software and the hardware components.

Beauty of ALT is in its simplicity. )
As always, anybody can ask me any questions related to the ALT tech and its use in any projects.
by almi
Sun Sep 17, 2017 5:43 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

cade, all:
The invitation above stands. If you are thinking about using the ALT tech in any of your projects, send me a message. I will be happy to talk.
cade:
Monitoring respiration rates and heart rates of several people looks possible to do using ALT.
by almi
Sun Apr 16, 2017 3:00 pm
Forum: Camera board
Topic: Another motion detection implementation
Replies: 2
Views: 631

Re:

Thanks John

Alex
by almi
Tue Apr 11, 2017 4:35 pm
Forum: Other projects
Topic: Non-contact tech for sleep monitoring
Replies: 6
Views: 2070

Re: Non-contact tech for sleep monitoring

… can it detect the hear rate no matter which way the person's facing? Yes, it can detect the heart rate no matter which way the person is facing. … is there a range limitation? Can the camera be a couple meters above the bed? My ALT setup (Kinect + Pi camera + Pi) is @ about 2 meters distance from...
by almi
Fri Apr 07, 2017 5:43 pm
Forum: Camera board
Topic: Another motion detection implementation
Replies: 2
Views: 631

Another motion detection implementation

ALTmotion uses simple, fast to compute, integral measures for the "amount of motion" in a captured video frame without calculating the lengths of the motion vectors. “Bare bones” Python code: https://github.com/lvetech/ALTmotion Works for me: https://github.com/lvetech/ALT - non-contact heartbeat an...
by almi
Tue Jan 24, 2017 1:18 am
Forum: Other projects
Topic: Non-contact tech for sleep monitoring
Replies: 6
Views: 2070

Re: Non-contact tech for sleep monitoring

"How ALT works" is on GitHub: https://github.com/lvetech/ALT
by almi
Tue Jan 10, 2017 1:51 pm
Forum: Other projects
Topic: Non-contact tech for sleep monitoring
Replies: 6
Views: 2070

Re: Non-contact tech for sleep monitoring

Here's some ALT data from Intel's RealSense F200 and R200 cameras:
https://www.linkedin.com/pulse/alt-puls ... s-misharin

I wish Pi had USB 3 or F200/R200 allowed working with USB 2 devices.
by almi
Wed Dec 14, 2016 1:16 pm
Forum: Other projects
Topic: Non-contact tech for sleep monitoring
Replies: 6
Views: 2070

Re: Non-contact tech for sleep monitoring

Thanks! The camera and projector can be pretty close to each other. For example, I have used the light projector and camera of a F200 (Intel RealSense) unit for ALT monitoring of pulse/respiration. Human eyes are mostly insensitive to infrared light of IR projectors used in different consumer electr...
by almi
Sat Oct 22, 2016 9:50 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

Re: non-contact heart rate and respiration rate monitoring

I am working on several applications of this technology. Some of them are: “What has happened while we slept?" ( https://www.linkedin.com/pulse/what-has-happened-while-we-slept-alexander-misharin ) shows that ALT can detect heartbeats and respiration even when a person is completely covered by a thi...
by almi
Wed Oct 19, 2016 4:24 pm
Forum: Other projects
Topic: Non-contact tech for sleep monitoring
Replies: 6
Views: 2070

Non-contact tech for sleep monitoring

Let me know if this is something of interest to you. This is still a research project. My intention is to release it under an open source license at some point. A brief example of what the ALT technology can do: ALT can monitor pulse and respiration of a person even if the person is completely cover...
by almi
Thu Aug 11, 2016 6:26 pm
Forum: Assistive technology and accessibility
Topic: Sight for the Blind for <100$
Replies: 718
Views: 167725

Re: Sight for the Blind for <100$

Hi, Here are some quite general remarks about the depth-sensing systems and 3D audio: For me it is not a question "if” small, cheap, and (hopefully) power-efficient depth-sensing elements will become available but rather "when" this will happen. And I think this might happen sooner rather then later...
by almi
Wed Aug 10, 2016 7:36 pm
Forum: Assistive technology and accessibility
Topic: Sight for the Blind for <100$
Replies: 718
Views: 167725

Re: Sight for the Blind for <100$: Going 3D

Hi, I am working on a system which can create 3D soundscapes. The system combines depth-sensing elements and 3D audio (binaural audio) synthesis engine for sonification of the 3D depth maps of the environment around a person. My goal is to make the system wearable which means that single-board compu...
by almi
Fri Jul 22, 2016 12:40 am
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 3439

non-contact heart rate and respiration rate monitoring

Hi, I have built a simple Raspberry Pi + Pi NoIR camera based system for non-contact real-time heart rate and respiration rate monitoring. I have posted a short description of the tech with data here: https://www.linkedin.com/pulse/use-artificial-light-texture-non-contact-real-time-heart-misharin
by almi
Thu Jul 21, 2016 11:28 am
Forum: Camera board
Topic: Raspberry Pi Camera as a heart rate sensor
Replies: 1
Views: 1040

Re: Raspberry Pi Camera as a heart rate sensor

I have built a simple Raspberry Pi + Pi NoIR camera based system for non-contact real-time heart rate and respiration rate monitoring.
I did not use the github project that you mentioned though.

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