Imaging apparatus and lighting control method
AssigneeCanon Kabushiki Kaisha
InventorYasuyoshi Miyazaki
Life of this patent
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Abstract
An imaging apparatus that uses luminance information obtained through a test flash by a flash unit for illuminating a subject to determine a flash quantity of a flash unit for main photographing sets exposure conditions for the test flash based on exposure conditions for the main photographing. The imaging apparatus changes a predetermined test flash quantity for the test flash to compensate a difference between the set exposure conditions and predetermined initial values of exposure conditions for the test flash and performs the test flash based on the set exposure conditions and the changed test flash quantity.
Claims20
An imaging apparatus comprising:
- an acquisition unit configured to acquire information related to a luminance of a subject;
- a main flash quantity determination unit configured to determine a main flash quantity of a flash apparatus based on the information related to the luminance of the subject when said flash apparatus pre flashes, the information acquired by said acquisition unit;
- an exposure determination unit configured to determine an exposure control value used when said flash apparatus pre-flashes, based on the information related to the luminance of the subject when said flash apparatus does not flash, the information acquired by said acquisition unit;
- and
- a pre-flash quantity determination unit configured to determine a pre-flash quantity of said flash apparatus based on the exposure control value determined by said exposure determination unit.
An imaging apparatus comprising:
- an acquisition unit configured to acquire information related to a luminance of a subject;
- a main flash quantity determination unit configured to determine a main flash quantity of a flash apparatus based on the information related to the luminance of the subject when said flash apparatus pre-flashes, the information acquired by said acquisition unit;
- an exposure determination unit configured to determine an exposure control value used when said flash apparatus pre-flashes, based on the information related to the luminance of the subject when said flash apparatus does not flash, the information acquired by said acquisition unit;
- and
- a are-flash quantity determination unit configured to determine a pre-flash quantity of said flash apparatus to bring a lighting control range of said flash apparatus into line with a target range when the exposure control value determined by said exposure determination unit is used
A lighting control method of an imaging apparatus, the lighting control method comprising:
- an acquisition step of acquiring information related to a luminance of a subject;
- a main flash quantity determination step of determining a main flash quantity of a flash apparatus based on the information related to the luminance of the subject when said flash apparatus pre-flashes, the information acquired in said acquisition step;
- an exposure determination step of determining an exposure control value used when said flash apparatus pre-flashes, based on the information related to the luminance of the subject when said flash apparatus does not flash, the information acquired in said acquisition step;
- and
- a pre-flash quantity determination step of determining a pre-flash quantity of said flash apparatus based on the exposure control value determined in said exposure determination step.
A lighting control method of an imaging apparatus, the light control method comprising:
- an acquisition step of acquiring information related to a luminance of a subject;
- a main flash quantity determination step of determining a main flash quantity of a flash apparatus based on the information related to the luminance of the subject when said flash apparatus pre-flashes, the information acquired in said acquisition step;
- an exposure determination step of determining an exposure control value used when said flash apparatus pre-flashes, based on the information related to the luminance of the subject when said flash apparatus does not flash, the information acquired in said acquisition step;
- and
- a pre-flash quantity determination step of determining a pre-flash quantity of said flash apparatus to bring a lighting control range of said flash apparatus into line with a target range when the exposure control value determined in said exposure determination step is used.
Dependencies are inferred from the claim text.