bhanukiran10000 / android-heart-rate-monitor

Automatically exported from code.google.com/p/android-heart-rate-monitor

android-heart-rate-monitor

Android heart rate monitor

Introduction

Android based heart rate monitor which uses the camera and its flash to determine the users heart rate in beats per minute.

• Created by Justin Wetherell
• Google: http://code.google.com/p/android-heart-rate-monitor
• Github: http://github.com/phishman3579/android-heart-rate-monitor
• LinkedIn: http://www.linkedin.com/in/phishman3579
• E-mail: [email protected]
• Twitter: http://twitter.com/phishman3579

Details

The App uses the PreviewCallback mechanism to grab the latest image from the preview frame. It then processes the YUV420SP data and pulls out all the red pixel values.

It uses data smoothing in a Integer array to figure out the average red pixel value in the image. Once it figures out the average it determines a heart beat when the average red pixel value in the latest image is greater than the smoothed average.

The App will collect data in ten second chunks and add the beets per minute to another Integer array which is used to smooth the beats per minute data.

How To

All you have to do is open the HeartRateMonitor App and then hold the tip of your index finger over the camera lens of your phone. The entire camera preview image should be red with a lighter area where the tip of your finger is touching. Do not press too hard or you will cut off circulation which will result in an inaccurate reading.

After a second or two, you should see the Android icon on the top of the screen start to flash red when it senses a heart beat. After ten seconds it will compute your heart rate and update the number next to the Android icon. It'll take between ten and thirty seconds to get an accurate heart rate.

android-heart-rate-monitor's Issues

Hide Surfaceview

Hi to everybody,
is possible hide the surfaceview and get only the heartrate?
Thanks :)

Original issue reported on code.google.com by [email protected] on 6 Dec 2013 at 8:50

Not accurate

It's not accurate. I get around 10 bpm more than the real heart rate.

Original issue reported on code.google.com by [email protected] on 7 Jan 2013 at 1:51

Patch for /trunk/src/com/jwetherell/heart_rate_monitor/HeartRateMonitor.java

problem in execution 

Original issue reported on code.google.com by [email protected] on 21 May 2012 at 2:20

Attachments:

• HeartRateMonitor.java.patch

Question

why did you choose the last 4 images ? if i make it six for example what would 
be the influence on changing number of images?

Original issue reported on code.google.com by [email protected] on 29 Jun 2012 at 3:47

• Merged into: #1

Question

could you please tell me what is the algorithm you have used for smoothing the 
red pixels signal ? 

Original issue reported on code.google.com by [email protected] on 5 May 2012 at 10:47

Optimization

Thank you for sharing the code can you guide me how to optimize the code to 
extract the value before 10s and how to get more accurate bpm like other apps 
thanks again

Original issue reported on code.google.com by [email protected] on 19 Jan 2014 at 10:40

Please Describe the alogorithm

What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?


Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 17 Jul 2014 at 7:29