Imaging apparatus and control method thereof
AssigneeCanon Kabushiki Kaisha
InventorKimihiro Masuyama
Life of this patent
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Abstract
A determination unit determines a weighting coefficient for a second light metering area corresponding to a focus detection area at which a second defocus amount having an absolute value larger than an absolute value of a first defocus amount is acquired relatively smaller than a weighting coefficient for a first light metering area corresponding to a focus detection area at which a first defocus amount is acquired, and changes a difference between the weighting coefficient for the first light metering area and the weighting coefficient for the second light metering area based on a plurality of defocus amounts including the defocus amount of the focus detection area not corresponding to the first light metering area and the second light metering area.
Claims16
An imaging apparatus that has a plurality of focus detection areas and a plurality of light metering areas, comprising:
- a defocus amount acquisition unit configured to acquire a defocus amount of each focus detection area;
- a light metering unit configured to acquire a light metering value of each light metering area;
- and
- a determination unit configured to determine a weighting coefficient for each light metering area;
- wherein the determination unit determines the weighting coefficient for a second light metering area corresponding to a focus detection area at which a second defocus amount having an absolute value larger than an absolute value of a first defocus amount is acquired relatively smaller than the weighting coefficient for a first light metering area corresponding to a focus detection area at which a first defocus amount is acquired, and changes a difference between the weighting coefficient for the first light metering area and the weighting coefficient for the second light metering area based on a plurality of defocus amounts including the defocus amount of the focus detection area not corresponding to the first light metering area and the second light metering area, the plurality of defocus amounts being acquired by the defocus amount acquisition unit.
An imaging apparatus including a plurality of focus detection areas and a plurality of light metering areas, comprising:
- a defocus amount acquisition unit configured to acquire a defocus amount in each focus detection area;
- a light metering unit configured to acquire a light metering value of each light metering area;
- a first calculation unit configured to calculate a first light metering value by performing weighting, based on the defocus amount acquired by the defocus amount acquisition unit, on the light metering value acquired by the light metering unit;
- a second calculation unit configured to calculate a second light metering value without performing weighting, based on the defocus amount acquired by the defocus amount acquisition unit, on the light metering value acquired by the light metering unit;
- an exposure calculation unit configured to calculate an exposure value based on a result of the first light metering value and the second light metering value being subjected to the weighting calculation;
- and
- a determination unit configured to determine a weighting coefficient so that the weighting of the first light metering value becomes smaller in the weighting calculation performed by the exposure calculation unit based on the defocus amounts acquired by the defocus amount acquisition unit.
A method for controlling an imaging apparatus, comprising:
- acquiring a defocus amount of each of a plurality of focus detection areas;
- acquiring a light metering value of each of a plurality of light metering areas;
- and
- determining a weighting coefficient for each light metering area;
- wherein the weighting coefficient for a second light metering area corresponding to the focus detection area at which a second defocus amount having an absolute value larger than an absolute value of a first defocus amount relatively is determined to be smaller than a weighting coefficient for a first light metering area corresponding to the focus detection area at which a first defocus amount is acquired, and a difference between the weighting coefficient for the first light metering area and the weighting coefficient for the second light metering area based on the plurality of acquired defocus amounts including the defocus amount of the focus detection area not corresponding to the first light metering area and the second light metering area.
A method for controlling an imaging apparatus, comprising:
- acquiring a defocus amount in each of a plurality of focus detection areas;
- acquiring a light metering value in each of a plurality of light metering areas;
- calculating a first light metering value by performing weighting based on the acquired defocus amount for the acquired light metering value;
- calculating a second light metering value without performing weighting based on the acquired defocus amount for the acquired light metering value;
- calculating an exposure value based on a result of the first light metering value and the second light metering value being subjected to a weighting calculation;
- and
- determining a weighting coefficient based on the acquired defocus amount so that the weighting of the first light metering value becomes smaller in the weighting calculation.
Dependencies are inferred from the claim text.