- What is PPG?
PPG also known as Photoplethysmography is a optical non-invasive method for measuring the blood volume changes per pulse. It effectively represents the mechanical activity of the heart.
- What is RPPG?
RPPG or remote Photoplethysmography is a method by which a face reader can measure heart rate and heart rate variability remotely. Where PPG is mostly used with wearable devices, RPPG detects the heart rate by using light and a completely contactless method. It measures the variance of red, green, and blue light reflection changes from the skin, as the contrast between specular reflection and diffused reflection.
- How is it possible to get these vitals from a face?
Please refer to the following article which explains the process by which vital stats can be read using RPPG.https://www.noldus.com/blog/what-is-rppg
- Does makeup affect the readings?
NO our algorithms adjust for makeup on the face.
- Does light affect readings?
We need normal lighting conditions for an effective reading, bright sunlight or glare affects the readings and are not recommended.
- How does different skin tones affect readings?
We’ve done many tests with a number of different skin tones and our algorithms
- Does age make a difference?
No, our technology is agnostic to age.
- How long does it take to get a reading?
Our readings depend on the speed of your internet connection, but on average take less than 60 seconds to perform.
- Where is my data stored and what is stored?
We take your snap shots for processing in our secure Azure cloud, once we have extracted the vitals , all information is deleted and the only data we keep is the core vitals, time stamped with no personally identifiable information.
- Is this a regulated device?
No, this is not a device and we are not regulated. We are a ‘first line of defence’ to detect vitals based on rPPG technology. This technology does not replace a physical device which would be used in a hospital.
- How accurate is this ?
Our accuracy is at 95% against a regulated device. We have tested it against high grade OxyMeter.
- Does it work on any phone?
Yes it works on any iphone 5 and above, it also works on most android devices with a hi-res camera.
- Does it work on my ipad?
Yes there is an Ipad version also available.
- Is there a Mac or Windows version?
Not yet, but it's in the pipeline. Our demand is mostly for mobile phones which people have with them all the time, hence the convenience of using our technology on the go.
- How often can I take readings?
As often as you like, we would recommend once a day , but depends on what you want to assess. The vitals we can accumulate, the more predictions we can make.
- What about ethnicity , can it handle readings from different groups of people?
We’ve tested our technology on a variety of ethnicities including darker skins.
- Can I use it without an internet connection?
No our solution needs an internet connection as all the ‘heavy work’ of processing is done our cloud servers from any where in the world. We need a decent 4g or good WiFi connection in order to get good accuracy.
- How can I integrate this technology into my app?
We offer a SDK and integration options, please speak to us on how this can be integrated into your application.
- Will it be able to detect if I have Covid?
We are not in the business of detecting Covid-19 , however the medics tell us that when SpO2 and Respiration rate are below certain values, there is a good sign of some form of respiratory disease and a good starting point for further diagnosis. We have the ability to detect these vitals using rPPG.
- If I perform measurements regulary, how can I predict my health?
In certain use cases, we can store regular readings and over time, allow our algorithms to predict the direction of travel of your health.
- What about my privacy? Where is my data held?
Frequently Asked Questions
Clearly we get asked a lot of questions about our technology and how it works. We've tried to answer the most commonly asked questions here, but if you have a specific question, please feel free to ask us.