Image pickup apparatus, control method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsGenjiro Shibagami, Naoki Iwasaki
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Abstract
An image pickup apparatus capable of achieving in-focus photographing with a reduced time lag. A system controller of the image pickup apparatus detects an in-focus state of image while moving a focus lens in an optical axis direction, and detects a state of a photographing scene at image acquisition. When detecting a change in photographing scene, the system controller moves the focus lens to a movement start position. When detecting that a photographing scene has been decided by a photographer, the controller detects an in-focus state while moving the focus lens.
Claims12
An image pickup apparatus comprising:
- an image pickup unit adapted to acquire an image by photoelectric conversion of an object image formed by a focus lens;
- a focus detection unit adapted to detect an in-focus state of the image while moving the focus lens in an optical axis direction;
- and
- a state detection unit adapted to detect a state of a photographing scene at acquisition of the image,
- wherein said focus detection unit is adapted to move the focus lens to a movement start position in a case where said state detection unit detects a photographing scene change, and
- wherein said focus detection unit is adapted to detect an in-focus state while moving the focus lens in a case where said state detection unit detects that a photographing scene has been decided.
A control method for an image pickup apparatus, comprising:
- an image pickup step of acquiring an image by photoelectric conversion of an object image formed by a focus lens;
- a focus detection step of detecting an in-focus state of the image while moving the focus lens in an optical axis direction;
- and
- a state detection step of detecting a state of a photographing scene at acquisition of the image,
- wherein the focus lens is moved to a movement start position in said focus detection step in a case where a photographing scene change is detected in said state detection step, and
- wherein an in-focus state is detected while moving the focus lens in said focus detection step in a case where it is detected in said state detection step that a photographing scene has been decided.
A computer-readable storage medium storing a program for causing a computer to execute a control method for an image pickup apparatus, the control method comprising:
- an image pickup step of acquiring an image by photoelectric conversion of an object image formed by a focus lens;
- a focus detection step of detecting an in-focus state of the image while moving the focus lens in an optical axis direction;
- and
- a state detection step of detecting a state of a photographing scene at acquisition of the image,
- wherein the focus lens is moved to a movement start position in said focus detection step in a case where a photographing scene change is detected in said state detection step, and
- wherein an in-focus state is detected while moving the focus lens in said focus detection step in a case where it is detected in said state detection step that a photographing scene has been decided.
Dependencies are inferred from the claim text.