US 11,758,248 B2
Information acquisition method and information acquisition device
Naotomo Miyamoto, Tokyo (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Oct. 26, 2020, as Appl. No. 17/79,622.
Claims priority of application No. 2019-199765 (JP), filed on Nov. 1, 2019.
Prior Publication US 2021/0136331 A1, May 6, 2021
Int. Cl. H04N 5/225 (2006.01); H04N 23/12 (2023.01); G03B 17/12 (2021.01); H04N 23/55 (2023.01); H04N 23/71 (2023.01)
CPC H04N 23/12 (2023.01) [G03B 17/12 (2013.01); H04N 23/55 (2023.01); H04N 23/71 (2023.01)] 14 Claims
OG exemplary drawing
 
1. An information acquisition method implemented by one or more processors, comprising:
acquiring, for each of frames, a brightness value corresponding to a position of a color filter from a light receiving device comprising light receiving elements whose light receiving surfaces are covered with color filters, the color filters including the color filter and the color filters comprising at least first color filters transmitting light of a wavelength band corresponding to a first color and second color filters transmitting light of a wavelength band corresponding to a second color;
detecting a signal candidate region in the frames based on a difference in brightness values of the position acquired from a plurality of frames and at least one of a threshold for the first color filters and a threshold for the second color filters, the signal candidate region being detected without generating a color image; and
acquiring information about a mobile device based on the difference between brightness values of the position acquired from the plurality of frames in the signal candidate region and said at least one of the threshold for the first color filters and the threshold for the second color filters.