Object recognition system and method of signal processing performed by object recognition system, and electronic apparatus

A method of signal processing, the method comprising:

• in an object recognition system that includes a light source, an event detection sensor, and a signal processor:
• emitting, by the light source, dot light onto an object, wherein
• the dot light has a pattern,
• the object reflects the dot light onto the event detection sensor,
• the event detection sensor includes:
• a first unit that includes a first plurality of pixels, and
• a second unit that includes a second plurality of pixels, and the first unit is adjacent to the second unit;
• determining, by the signal processor, a distance between the event detection sensor and the object;
• changing, by the signal processor, a number of at least one of the first plurality of pixels or the second plurality of pixels, wherein the change of the number is based on the determined distance;
• detecting, by the event detection sensor, a dot light beam of the reflected dot light in the at least one of the first plurality of pixels or the second plurality of pixels, wherein the reflected dot light has the pattern;
• detecting, as an event by the event detection sensor, 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 threshold, wherein the detection of the event is within a specific time;
• outputting, by the event detection sensor, first event information that includes second event information and noise information, wherein
• the second event information has the pattern, and
• the output of the first event information is based on the event;
• determining, by the signal processor, whether the output of the first event information is one of within the specific time or outside of the specific time;
• reading, by the signal processor, 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
• removing, by the signal processor, 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.

An electronic apparatus, comprising:

• an object recognition system including:
• 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 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.

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 one or more pixels of at least one of the first plurality of pixels or the second plurality of pixels, and
• the event detection sensor is configured to:
• receive the reflected dot light having the pattern;
• detect a dot light beam of the dot light in at least one of the first unit or the second unit;
• detect, that a change in luminance of the one or more pixels of at least one of the first plurality of pixels or the second plurality of pixels has exceeded a threshold, as an event;
• detect the event in the at least one of the first unit or the second unit within a 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:
• detect a distance between the event detection sensor and the object;
• change, based on the detected distance, a number of the at least one of the first plurality of pixels in the first unit or the second plurality of pixels in the second unit, in which the dot light beam is detected;
• read the event as the second event information in the at least one of the first unit or the second unit;
• and
• remove the noise information from the first event information.