Information processing apparatus for controlling parameter to detect object, information processing method, and storage medium

1. An apparatus comprising:

a photoelectric conversion device that outputs an event signal indicating both a position of a pixel and a time at which a luminance change has occurred;

at least one processor; and

a memory coupled to the at least one processor, the memory storing instructions that, when executed by the at least one processor, cause the at least one processor to:

detect an object based on the event signal output by the photoelectric conversion device; and

change at least one parameter in a case where a time period during which the object is not detected, is longer than a predetermined time period.

2. The apparatus according to claim 1 , wherein the parameter includes a parameter to change at least one of a position, a shape, or a luminance value of an image of the object on a plane.

3. The apparatus according to claim 2 , wherein the parameter includes a direction of a capturing device that obtains the event signal.

4. The apparatus according to claim 3 , wherein the parameter is a parameter for changing an angle of view of the capturing device.

5. The apparatus according to claim 3 , wherein the parameter is a parameter for changing a focus position of the capturing device.

6. The apparatus according to claim 1 ,

wherein the apparatus is an imaging apparatus including at least one of an aperture, a light absorption filter, or an illumination unit, and

wherein the parameter is a control value for adjusting an amount of light incident on a conversion device configured to obtain the event signal.

7. The apparatus according to claim 6 , further comprising at least one of a light absorption filter that selectively absorbs light with a specific wavelength, or an illumination device that emits light with a specific wavelength,

wherein the parameter is a control value for adjusting a range of a wavelength of light received by the conversion device.

8. The apparatus according to claim 1 , wherein, in a case where the object is not detected even though the parameter has been changed, an amount of change with respect to the changed parameter, or a parameter of a different type from the changed parameter among the parameters is changed.

9. The apparatus according to claim 1 , further comprising a storage unit configured to store a position of the detected object,

wherein the event signal is output related to a pixel with a luminance change exceeding a predetermined threshold value, and

wherein the predetermined threshold value is increased in a case where the object is detected after changing the parameter at a position that is a same as the stored position of the object.

10. The apparatus according to claim 9 , wherein the predetermined threshold value is decreased in a case where the object is detected after changing the parameter at a position different from the stored position of the object.

11. The apparatus according to claim 9 , wherein, in a case where a range has become wider by changing the parameter, the predetermined threshold value is decreased in a case where the object is detected.

12. The apparatus according to claim 1 , further comprising an output unit configured to output the event signal or a detection result of the object,

wherein the output unit outputs a notification in a case where the parameter is changed.

13. The apparatus according to claim 12 , wherein the output unit outputs a notification to a user in a case where the object is not detected even though the parameter has been changed.

14. The apparatus according to claim 12 , further comprising a generation unit configured to generate a frame image based on the event signal,

wherein the output unit outputs, in a case where a direction as the parameter is controlled, the generated frame image on which a position of the object is changed based on the direction, and

wherein the output unit outputs, in a case where an angle of view as the parameter is controlled, a part of the generated frame image.

15. The apparatus according to claim 1 , wherein a predetermined object is detected based on a position of a pixel having a predetermined signal included in the event signal.

16. The apparatus according to claim 1 , wherein the event signal is output by a conversion device including a pixel that outputs a signal in response to an input of a photon.

17. A non-transitory storage medium storing a program for causing a computer to execute a method, the method comprising:

obtaining an event signal indicating both a position of a pixel and a time at which a luminance change has occurred;

detecting an object based on the event signal; and

changing at least one parameter, in a case where a time period during which the object is not detected is longer than a predetermined time period.

18. The non-transitory storage medium according to claim 17 , wherein the parameter includes at least one of a position, a shape, or a luminance value of an image of the object on a plane.

19. A method comprising:

obtaining an event signal indicating both a position of a pixel and a time at which a luminance change has occurred;

detecting an object based on the event signal; and

changing at least one parameter, in a case where a time period during which the object is not detected is longer than a predetermined time period.

20. The method according to claim 19 , wherein the parameter includes a parameter to change at least one of a position, a shape, or a luminance value of an image of the object on a plane.