CPC A61B 5/1032 (2013.01) [A61B 5/0077 (2013.01); A61B 5/0205 (2013.01); A61B 5/02416 (2013.01); A61B 5/1176 (2013.01); A61B 5/14542 (2013.01); A61B 5/14551 (2013.01); A61B 5/441 (2013.01); A61B 5/6843 (2013.01); A61B 5/7203 (2013.01); A61B 5/7221 (2013.01); A61B 5/7278 (2013.01); A61B 5/743 (2013.01); A61B 5/746 (2013.01); A61B 5/748 (2013.01); A61B 5/7425 (2013.01); A61B 5/7485 (2013.01); A61B 5/024 (2013.01); A61B 5/0816 (2013.01); A61B 2562/0233 (2013.01); A61B 2576/00 (2013.01)] | 19 Claims |
1. A video-based method of measuring a patient's vital sign, comprising:
receiving a video signal from a video camera, the video signal having a field of view;
extracting from the video signal a time-varying color signal for each of a plurality of regions;
identifying a frequency content of each time-varying color signal;
selecting two or more non-adjacent regions that have a shared frequency content comprising a modulation at a shared frequency;
combining the color signals of the selected regions to thereby provide a combined color signal;
measuring a vital sign from the combined color signal;
outputting the vital sign for further processing or display; and
updating the selected regions by adding or removing regions from the selected regions based on the frequency content of each region.
|