Focus adjustment apparatus and method, image capturing apparatus, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorNAOKI IWASAKI
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Abstract
A focus adjustment apparatus includes a subject detection unit configured to detect a subject from an image, a motion detection unit configured to detect a motion and store a history of the motion for the detected subject, a focus adjustment unit configured to focus on a subject; and a prediction unit configured to predict, when the focus adjustment unit shifts from a state of focusing on a first subject to a state of focusing on a second subject, a focus adjustment position for the focus adjustment unit to focus on the second subject based on a history of a motion of the second subject stored by the motion detection unit.
Claims10
A focus adjustment apparatus comprising at least one processor or circuit configured to function as:
- a subject detection unit configured to detect a subject from an image;
- a motion detection unit configured to detect a motion and store a history of the motion for the detected subject;
- a focus adjustment unit configured to focus on a subject;
- and
- a prediction unit configured to predict, when the focus adjustment unit shifts from a state of focusing on a first subject to a state of focusing on a second subject, a focus adjustment position for the focus adjustment unit to focus on the second subject based on a history of a motion of the second subject stored by the motion detection unit.
A focus adjustment method comprising:
- executing subject detection for detecting a subject from an image;
- executing motion detection of detecting a motion and storing a history of the motion for the detected object;
- executing focus adjustment for focusing on a subject;
- and
- predicting, when shifting from a state of focusing on a first subject to a state of focusing on a second subject in the focus adjustment, a focus adjustment position for focusing on the second subject in the focus adjustment based on a history of a motion of the second subject stored in the motion detection.
A non-transitory computer-readable storage medium storing a program for causing a computer to execute each step of a focus adjustment method, the focus adjustment method comprising
- executing subject detection for detecting a subject from an image;
- executing motion detection of detecting a motion and storing a history of the motion for the detected subject;
- executing focus adjustment for focusing on a subject;
- and
- predicting, when shifting from a state of focusing on a first subject to a state of focusing on a second subject in the focus adjustment, a focus adjustment position for focusing on the second subject in the focus adjustment based on a history of a motion of the second subject stored in the motion detection.
Dependencies are inferred from the claim text.