Fujitsu software uses a smartphone's camera to measure your pulse@ 2013/03/19
The technology, which works by measuring brightness variations in your face, does not require special hardware. Using a camera attached to a computer, smartphone or tablet, the tool can detect your pulse in just five seconds. You need to remain still in order to achieve accurate results -- the software begins measuring once you stop moving, and works by detecting the flow of hemoglobin in blood, which absorbs green light. Readers currently in Gifu, Japan for the General Conference of the Institute of Electronics, Information, and Communication Engineers can test the solution for themselves beginning tomorrow. The rest of you can continue reading up on the development in the press release after the break. Cue DigInfo walkthrough.
Update: As readers have pointed out, other solutions have already made their way to market, such as the Cardiio app, which is available for iOS at 3 bucks a pop. We haven't tested the app, but iTunes feedback is quite positive. You can snag it at the source link now.