US 11,836,288 B2
Distance estimation device, distance estimation method and distance estimation program
Jumpei Yamashita, Musashino (JP); Hidetaka Koya, Musashino (JP); and Hajime Nakajima, Musashino (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/614,189
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed May 31, 2019, PCT No. PCT/JP2019/021856
§ 371(c)(1), (2) Date Nov. 24, 2021,
PCT Pub. No. WO2020/240864, PCT Pub. Date Dec. 3, 2020.
Prior Publication US 2022/0244778 A1, Aug. 4, 2022
Int. Cl. G06F 3/01 (2006.01); G01P 13/00 (2006.01); G01P 15/00 (2006.01)
CPC G06F 3/013 (2013.01) [G01P 13/00 (2013.01); G01P 15/00 (2013.01); G06F 3/012 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A distance estimation apparatus comprising:
processing circuitry configured to:
acquire a sensor value output from a sensor configured to measure a relative motion of a head including an acceleration of the head or an amount of rotation of the head, or a relative motion of eyeballs of a user who visually searches for a target on a plane, the relative motion of eyeballs including an ocular potential;
estimate a size of a search target plane in field of view of the user based on a maximum value of an amount of change when a rate of change in the sensor value becomes maximum, the sensor value being acquired within a time period that is equal to or greater than a predetermined threshold; and
estimate a distance between the user and the search target plane of the target based on the size of the search target plane in field of view.