How do cellphones calculate heart rate?
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I understand that the camera in the phones try count the undulations in the blood flow per unit time, but is the mechanism same as the one used in professional infrared based SpO2 monitors ?
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Answer:
If you are asking about heartbeat monitoring apps that use the camera an flash led to detect pulses then look up pulse oximeter and infrared heart rate monitor on Google. The app continuously looks at the variation of the light detected at the camera when u have placed your finger over it with the flash led on. Its not 100 percent accurate and you have to be steady. Eg:- app instant heart rate from azumio available on android appstore The Samsung galaxy s5 has a built in heartbeat monitor which makes use of a dedicated infrared based sensor.
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