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phishman3579 / android-heart-rate-monitor

Android heart rate monitor
Apache License 2.0
465 stars 260 forks source link

Inaccurate results #8

Open PriyaSindkar opened 8 years ago

PriyaSindkar commented 8 years ago

I am getting inaccurate results when I take the readings 5 times back to back.. these are the following readings I am getting: 77, 59, 65, 65, 77

Has anyone faced this issue too? or is it just my pulses that are fluctuating? If the issue is real I would really like a solution as it's causing a bottleneck in my project.

thomcz commented 7 years ago

I can't tell you if the project calculates your heart rate right, but it's normal that if your measure your heart rate 5 times it should never be the same because your heart beats irregular. If you want to learn more about read this: https://en.wikipedia.org/wiki/Heart_rate_variability

groupboard commented 7 years ago

The problem is that the algorithm used is very basic...it just measures a heartbeat whenever the red intensity goes below the average. If there's any noise in the signal then you'll end up getting multiple beats counted for one actual heartbeat.