I haven't downloaded this yet, but I certainly will. If it is accurate and reasonably precise (yea, what does that mean?), I'd like to have it running in the background, gathering data as I work, while also gathering statistics about my work. I, like most of the people here, am a productivity junky. I wonder if a heightened pulse could indicate mounting stress, which necessitates a break. Sure, I have other machinery that could indicate mounting stress -- like my mind -- but the quantitative, off-loaded metric shifts responsibility in a way that could be helpful. "I'm not really stressed," says me to my brain. "No, your heart rate is quite high," says my computer to me.
Webcam Pulse Detector
61–70 of 85 posts
Re: Webcam Pulse Detector
#62Re: Webcam Pulse Detector
#63Re: Webcam Pulse Detector
#64Re: Webcam Pulse Detector
#65I haven't downloaded this yet, but I certainly will. If it is accurate and reasonably precise (yea, what does that mean?), I'd like to have it running in the background, gathering data as I work, while also gathering statistics about my work. I, like most of the people here, am a productivity junky. I wonder if a heightened pulse could indicate mounting stress, which necessitates a break. Sure, I have other machinery…
You could get better results with a Bluetooth pulse monitor.
Re: Webcam Pulse Detector
#66Earlier quoted context omitted.
On each heartbeat, blood is pushed and makes the skin nearly unperceivably redder. By watching for and tracking this subtle change, you can extract a heartbeat.
> ... unperceivably redder But why is he analyzing the green channel then? :)
Look at the absorption spectra at http://omlc.ogi.edu/spectra/hemoglobin/index.html. Green is ~510nm, red is ~650nm, blue is ~475nm. The difference between the absorption of Hb and HbO2 in the red range is the reason why pulse oximeters use red. In this case, we don't care about differentiating oxy- vs. deoxy-hemoglobin, we just care about the total absorption. Since more light is absorbed at green than at red, it will show more of an effect with pulse.
I am not confident in this explanation, and still don't know why green over blue.
Re: Webcam Pulse Detector
#67I haven't downloaded this yet, but I certainly will. If it is accurate and reasonably precise (yea, what does that mean?), I'd like to have it running in the background, gathering data as I work, while also gathering statistics about my work. I, like most of the people here, am a productivity junky. I wonder if a heightened pulse could indicate mounting stress, which necessitates a break. Sure, I have other machinery…
You could get better results with a Bluetooth pulse monitor.
That probably requires wearing something, potentially on your finger. Webcam is much less intrusive.
Re: Webcam Pulse Detector
#68I've gotten this far trying to install this on Lion:
brew install gfortran
sudo easy_install scipy
sudo port install opencv +python27
export PYTHONPATH=/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/:$PYTHONPATH
wget http://openmdao.org/releases/0.5.0/go-openmdao.py
sudo python ./go-openmdao.py
cd ~/Downloads/webcam-pulse-detector-master/openmdao-0.5.0
. bin/activate
cd ~/Downloads/webcam-pulse-detector-master && python get_pulse.py
Hope it's helpful to anyone else doing the same. OpenCV is segfaulting now, but I may update this later if I get it.
Re: Webcam Pulse Detector
#69Give it a video feed from a political debate and live-tweet the politicians pulse on different topics. I foresee a future of politicians sporting bangs and bob cuts.
They're already so heavily made-up for the cameras I would be surprised if this worked.
Necks might not be, or hands.
This would probably be a bad metric though, you might accidentally be selecting for sociopathic traits or something which might be undesirable in a politician.