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US RE48,780 E1Granted
Method and apparatus for extracting static pattern based on output of event-based sensor
AssigneeSamsung Electronics Co., Ltd.
InventorsJun Haeng Lee, Keun Joo Park, Changwoo Shin, Jooyeon Woo, Hyunsurk Eric Ryu, Seokjin Hong
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Abstract
A method of extracting a static pattern from an output of an event-based sensor. The method may include receiving an event signal from the event-based sensor in response to dynamic input, and extracting a static pattern associated with the dynamic input based on an identifier and time included in the event signal. The static pattern may be extracted from a map generated based on the identifier and time.
Claims60
A pattern extraction method comprising:
- receiving an event signal indicating an event from an event-based sensor;
- extracting a static pattern, which represents an object, based on an identification and time included in the event signal;
- and
- outputting the extracted static pattern,
- wherein the identification comprises location information of each of a plurality of pixels of the event-based sensor that sensed the event and the time comprises a time point in which the event is detected by a respective pixel from among said each pixel, and
- wherein the extracting comprises generating a map comprising a plurality of elements corresponding to the location information of the plurality of pixels of the event-based sensor in which the time point is a value of a respective element from among the plurality of elements,
- wherein the map is a three dimensional (3D) map and the extracting comprises extracting a ridge from the 3D map generated based on the identification and the time.
4 more elements
A pattern extraction method comprising:
- receiving an event signal indicating an event from an event-based sensor;
- extracting a pattern, which represents a motionless object, based on an identification and time included in the event signal;
- and
- outputting the pattern,
- wherein the extracting comprises:
- generating a plurality of maps corresponding to a plurality of depth regions based on the identification and the time;
- and
- extracting a ridge from at least one of the plurality of maps.
5 more elements
A pattern extraction apparatus comprising:
- an event-based sensor configured to output an event signal indicating an event, the event signal comprising time and an identification of the event;
- and
- a processor configured to extract a static pattern, which represents an object, based on the event signal and to output the extracted static pattern outside the pattern extraction apparatus,
- wherein the identification comprises location information of each of a plurality of pixels of the event-based sensor that sensed the event and the time comprises a time point in which the event is detected by a respective pixel from among said each pixel, and
- wherein the processor is configured to extract the static pattern by generating a map comprising a plurality of elements corresponding to the location information of the plurality of pixels of the event-based sensor in which the time point is a value of a respective element from among the plurality of elements, and
- wherein the processor is configured to extract a ridge from the map, which is a 3D map.
3 more elements
A display apparatus comprising
- a motion sensor comprising a plurality of sensing pixels and configured to output a signal representing a motion of an object, wherein the motion of the object is represented by time and corresponding location information indicating at least one pixel sensing the motion of the object among the plurality of sensing pixels;
- a processor configured to generate at least one map based on the location information and the time, extract elements storing time within a threshold time interval among a plurality of elements included in the map, generate a new threshold time interval by adjusting a length of the threshold time interval based on a number of the extracted elements, and extracting new elements within the new threshold time interval, and detect the object based on the elements and the new elements, extracted by the processor,
- wherein the processor is configured to extract a ridge from the map, which is a 3D map.
A pattern extraction apparatus comprising:
- an event-based sensor configured to generate time information and identification information in response to an event, and output an event signal including the time information and the identification information;
- and
- a memory configured to store the time information and the identification information,
- wherein the event-based sensor is configured to determine whether a change in a log intensity of light detected by at least one pixel among a plurality of pixels of the event-based sensor, after the event, exceeds a threshold, and to generate an ON event signal or an OFF event signal based on whether the change in the log intensity, after the event, exceeds the threshold,
- wherein the identification information comprises location information of each of the plurality of pixels of the event-based sensor that sensed the event and the time information comprises a time point in which the event is detected by a respective pixel from among said each pixel, and
- wherein, based on the event signal, a pattern, representing an object, is extracted, by generating a 3D map comprising a plurality of elements corresponding to the location information of the plurality of pixels of the event-based sensor in which the time point is a value of a respective element from among the plurality of elements, and extracting a ridge from the 3D map.
3 more elements
A pattern extracting apparatus comprising:
- an event-based sensor configured to generate time information and identification information based on a movement of an object;
- and
- a processor configured to extract a static pattern corresponding to an appearance of the object in a state in which the object stops based on the time information and the identification information,
- wherein the identification information comprises location information of each of a plurality of pixels of the event-based sensor that sensed the movement of the object and the time comprises a time point in which the movement of the object is detected by a respective pixel from among said each pixel,
- wherein the processor is configured to extract the static pattern by generating a map comprising a plurality of elements corresponding to the location information of the plurality of pixels of the event-based sensor in which the time point is a value of a respective element from among the plurality of elements, and
- wherein the processer is further configured to track the static pattern to adjust a thickness of an edge of the static pattern to be equal or less than a threshold thickness.
3 more elements
Dependencies are inferred from the claim text.