US 12,439,170 B2
Object recognition system and method of signal processing performed by object recognition system, and electronic apparatus
Kenta Endo, Tokyo (JP); and Ayaka Hirata, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/755,207
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Aug. 4, 2020, PCT No. PCT/JP2020/029799
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/084832, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-197052 (JP), filed on Oct. 30, 2019.
Prior Publication US 2022/0400213 A1, Dec. 15, 2022
Int. Cl. H04N 23/56 (2023.01); G06V 40/16 (2022.01); H04N 23/71 (2023.01); H04N 23/74 (2023.01); H04N 23/76 (2023.01); H04N 25/672 (2023.01)
CPC H04N 23/76 (2023.01) [G06V 40/161 (2022.01); G06V 40/168 (2022.01); H04N 23/56 (2023.01); H04N 23/71 (2023.01); H04N 23/74 (2023.01); H04N 25/672 (2023.01)] 13 Claims
OG exemplary drawing
 
1. An object recognition system, comprising:
a light source configured to emit dot light onto an object, wherein the dot light has a pattern;
an event detection sensor including:
a first unit that includes a first plurality of pixels; and
a second unit that includes a second plurality of pixels, wherein
the first unit is adjacent to the second unit,
the object reflects the dot light onto the event detection sensor, and
the event detection sensor is configured to:
detect a dot light beam of the reflected dot light in at least one of the first plurality of pixels or the second plurality of pixels, wherein the reflected dot light has the pattern;
detect, that a change in luminance of each pixel of the at least one of the first plurality of pixels or the second plurality of pixels has exceeded a first threshold, as an event, wherein the detection of the event is within a specific time; and
output, based on the event, first event information that includes second event information and noise information, wherein the second event information has the pattern; and
a signal processor configured to:
determine a distance between the event detection sensor and the object;
change, based on the determined distance, a number of the at least one of the first plurality of pixels or the second plurality of pixels, in which the dot light beam is detected;
determine whether the output of the first event information is one of within the specific time or outside of the specific time;
read the second event information from the first event information in a case where the output of the first event information is within the specific time, wherein the second event information is read in the at least one of the first plurality of pixels or the second plurality of pixels; and
remove the noise information from the first event information in a case where the output of the first event information is outside of the specific time.