Granted Patent B2

US 12,457,416 · App. 18/425,418 · Granted Oct 28, 2025

Inventors: Naoki Maruyama (Tokyo, JP); Junya Mizutani (Tokyo, JP)

Assignee: Canon Kabushiki Kaisha

H04N23/675H04N23/611

Abstract

Claims (34)

1 . A control apparatus comprising:

one or more memories storing instructions; and

one or more processors that, upon execution of the stored instructions, are configured to:

perform determination processing to determine a focus degree of each of two or more partial areas in a captured image acquired by a camera; and

select, based on the determined focus degree of each of the two or more partial areas, a subject detection area in the captured image acquired by the camera,

wherein the one or more processors are further configured to perform adjustment processing to adjust a focus position of the camera,

wherein, based on distance information about a subject detected from the captured image, the one or more processors are configured to change the focus position in the adjustment processing, and change the subject detection area, and

wherein the one or more processors are configured to set an adjustment amount of the focus position by the adjustment processing based on hyperfocal distance information obtained from an imaging condition based on the distance information about the subject.

2 . The control apparatus according to claim 1 , wherein, in the determination processing, the one or more processors are configured to divide an imaging area of the camera into a plurality of partial areas of a predetermined size, and determine a focus degree of each partial area.

3 . The control apparatus according to claim 1 ,

wherein the one or more processors are further configured to perform detection processing to detect a subject from an image, and

wherein, in the determination processing, the one or more processors are configured to detect a focus degree of a partial area in the captured image that corresponds to the subject detected by the detection processing.

4 . The control apparatus according to claim 1 ,

wherein the one or more processors are further configured to perform setting processing to set a priority related to the selection of the subject detection area, and

wherein the one or more processors are configured to select the subject detection area in the captured image based on the focus degree of each partial area that is determined by the determination processing and the priority set by the setting processing.

5 . The control apparatus according to claim 4 , wherein the one or more processors are configured to select the subject detection area in the captured image based on a result of subject detection in the captured image and the focus degree of each partial area in the captured image that is weighted based on the priority.

6 . The control apparatus according to claim 1 , wherein, in the determination processing, the one or more processors are configured to detect the focus degree in the image based on at least one of a contrast value, the distance information about the subject, a pattern matching degree, and attribute information about a detection target object.

7 . The control apparatus according to claim 1 , wherein, in a case where detection processing of detecting one or more subjects including a first subject in a first detection area corresponding to distance information about the first subject is completed, the one or more processors are configured to change the focus position of the camera to a second focus position which is based on distance information about a second subject in the adjustment processing.

8 . The control apparatus according to claim 1 , wherein the one or more processors are configured to perform detection area control processing to select the subject detection area based further on a camera setting of the camera in performing imaging.

9 . The control apparatus according to claim 8 , wherein the camera setting is at least one of a setting of an evaluation area related to autofocus control and a setting of an evaluation area related to automatic exposure control.

10 . The control apparatus according to claim 1 , further comprising the camera.

11 . The control apparatus according to claim 1 , wherein the one or more processors are configured to perform authentication processing on a subject detected from the subject detection area.

12 . A control method that a control apparatus performs, the control method comprising:

determining a focus degree of each of two or more partial areas in a captured image acquired by a camera;

selecting, based on the determined focus degree of each of the two or more partial areas, a subject detection area in the captured image acquired by the camera;

performing adjustment processing to adjust a focus position of the camera,

changing, based on distance information about a subject detected from the captured image, the focus position in the adjustment processing, and change the subject detection area; and

setting an adjustment amount of the focus position by the adjustment processing based on hyperfocal distance information obtained from an imaging condition based on the distance information about the subject.

13 . A non-transitory computer-readable storage medium that stores a program for causing a computer to:

determine a focus degree of each of two or more partial areas in a captured image acquired by a camera;

select, based on the determined focus degree of each of the two or more partial areas, a subject detection area in the captured image acquired by the camera;

perform adjustment processing to adjust a focus position of the camera,

change, based on distance information about a subject detected from the captured image, the focus position in the adjustment processing, and change the subject detection area; and

set an adjustment amount of the focus position by the adjustment processing based on hyperfocal distance information obtained from an imaging condition based on the distance information about the subject.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (21)