Information processing apparatus, information processing method, and storage medium for displaying am image indicating a pixel where a luminance change occurs based on a signal
An apparatus according to the present invention includes a detection unit configured to detect an event based on a signal indicating a location of a pixel where a luminance change occurs and time when the luminance change occurs, and a display control unit configured to display an image indicating the pixel where the luminance change occurs based on the signal. In a case where the event is not detected, the image includes additional information indicating the event previously detected.
1. An apparatus comprising:
at least one memory storing instructions; and
at least one processor that executes the stored instructions that cause the at least one processor to:
acquire a signal indicating a location of a pixel where a luminance change occurs and time when the luminance change occurs from an image capture device;
acquire an event that is detected based on the signal;
cause a display device to display a first image indicating the pixel where the luminance change occurs based on the acquired signal in a case where the event is detected; and
cause the display device to display a second image, which includes a third image where the event was previously detected, in a case where the event is not detected.
2. The apparatus according to claim 1 , wherein the event depending on presence or absence of the pixel where the luminance change occurs is detected.
3. The apparatus according to claim 2 , wherein the event is detected in a case where the number of connected pixels indicating the number of continuous pixels in the signal acquired during a first period is more than or equal to a first threshold.
4. The apparatus according to claim 2 , wherein the event is detected in a case where the signal acquired during the first period is similar to feature point data indicating a contour of a subject, the feature point data being preliminarily stored.
5. The apparatus according to claim 1 , wherein the event is detection of a moving subject.
6. The apparatus according to claim 5 , wherein, in a case where the moving subject detected in a preceding frame is not detected in a current frame, the second image is displayed.
7. The apparatus according to claim 1 , wherein the stored instructions further cause the at least one processor to generate an image indicating a location of a pixel where a luminance change occurs based on the number of output event address signals in respective pixels acquired at intervals.
8. The apparatus according to claim 7 , wherein the third image is generated based on the signal acquired during a period.
9. The apparatus according to claim 8 , wherein the third image is generated based on the signal acquired during the period dynamically determined.
10. The apparatus according to claim 1 , wherein the third image is displayed with at least one of hue, saturation, and brightness of the third image changed.
11. The apparatus according to claim 10 , wherein the second image is displayed with at least one of hue, saturation, and brightness of a subject in the third image.
12. The apparatus according to claim 1 , wherein a frame corresponding to a subject is displayed in the second image.
13. The apparatus according to claim 1 , wherein the second image is generated by superposing the third image onto a fourth image based on a signal when the event is not detected.
14. The apparatus according to claim 1 , wherein the second image is generated by combining the third image with a fourth image based on a signal when the event is not detected.
15. The apparatus according to claim 1 , wherein the signal is output from a sensor configured to detect a change in luminance of each pixel, and in a case where no luminance change is detected, the signal is not output, or that no luminance change is detected is indicated.
16. The apparatus according to claim 1 , wherein the signal is output from a photoelectric conversion element including a pixel for outputting a signal based on photon incidence.
17. A method comprising:
acquiring an event based on a signal indicating a location of a pixel where a luminance change occurs and time when the luminance change occurs from an image capture device;
acquiring an event that is detected based on the signal;
causing a display device to display a first image indicating the pixel where the luminance change occurs based on the acquired signal in a case where the event is detected; and
causing the display device to display a second image, which includes a third image where the event was previously detected, in a case where the event is not detected.
18. The method according to claim 17 , wherein the detecting detects the event depending on presence or absence of the pixel where the luminance change occurs.
19. A non-transitory computer-readable storage medium storing a program for causing a computer to perform a method, the method comprising:
acquiring an event based on a signal indicating a location of a pixel where a luminance change occurs and time when the luminance change occurs from an image capture device;
acquiring an event that is detected based on the signal;
causing a display device to display a first image indicating the pixel where the luminance change occurs based on the acquired signal in a case where the event is detected; and
causing the display device to display a second image, which includes a third image where the event was previously detected, in a case where the event is not detected.
20. The non-transitory computer-readable storage medium storing a program according to claim 19 , wherein the detecting detects the event depending on presence or absence of the pixel where the luminance change occurs.