US 12,220,215 B2
Operating method of 3D physiological detection system and host
Sen-Huang Huang, Hsin-Chu County (TW); and Ren-Hau Gu, Hsin-Chu County (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu County (TW)
Filed by PixArt Imaging Inc., Hsin-Chu County (TW)
Filed on Jun. 29, 2021, as Appl. No. 17/362,346.
Application 16/412,702 is a division of application No. 14/847,143, filed on Sep. 8, 2015, granted, now 10,335,046.
Application 17/362,346 is a continuation of application No. 16/412,702, filed on May 15, 2019, granted, now 11,076,768.
Claims priority of application No. 103145066 (TW), filed on Dec. 23, 2014.
Prior Publication US 2021/0321892 A1, Oct. 21, 2021
Int. Cl. A61B 5/024 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/02427 (2013.01) [A61B 5/7257 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/04 (2013.01); A61B 2576/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An operating method of a host which receives a plurality of PPG signals each corresponding to one pixel region of a frame acquired by a portable device, the operating method comprising:
converting the plurality of PPG signals to a frequency domain thereby generating a plurality of frequency domain signals each corresponding to one of pixel regions;
respectively retrieving a peak spectral energy value of the frequency domain signals corresponding to each of the pixel regions; and
constructing a three dimensional energy distribution of peak spectral energy values, each peak spectral energy value corresponding to one of the pixel regions, by distributing the peak spectral energy values in a two dimensional space corresponding to the pixel regions as the three dimensional energy distribution that has an energy value corresponding to each of the pixel regions.