Image sensing apparatus, control method for illumination device, flash photographing method, and computer program product
AssigneeCanon Kabushiki Kaisha
InventorHideo Kawahara
Life of this patent
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Abstract
It is an object of this invention to provide an apparatus which can properly expose a main object regardless of the background conditions. In order to achieve this object, there is provided an apparatus comprising a photometric unit for receiving object light and converting the object light into luminance signals of a plurality of areas, and a control unit for calculating the histogram of the luminance distribution on the basis of the luminance signals of the plurality of areas converted by the photometric unit, and controlling the operation of an illumination device for illuminating the object on the basis of the calculation result.
Claims26
An apparatus comprising:
- (A) a photometric unit for receiving object light and converting the object light into luminance signals of a plurality of areas;
- and
- (B) a control unit for calculating a histogram of a luminance distribution on the basis of the luminance signals of the plurality of areas converted by said photometric unit, said control unit controlling operation of an illumination device for illuminating an object based on a result of the calculating.
An apparatus comprising:
- (A) a photometric unit for receiving object light and converting the object light into luminance signals of a plurality of areas;
- and
- (B) a control unit for calculating a histogram of a luminance distribution on the basis of the luminance signals of the plurality of areas converted by said photometric unit, said control unit controlling flash photographing operation based on a result of the calculating.
An illumination device control method comprising:
- receiving object light, converting the object light into luminance signals of a plurality of areas, calculating a histogram of a luminance distribution on the basis of the converted luminance signals of the plurality of areas, and controlling operation of an illumination device for illuminating an object based on a result of the calculating.
A flash photographing method comprising:
- receiving object light, converting the object light into luminance signals of a plurality of areas, calculating a histogram of a luminance distribution on the basis of the converted luminance signals of the plurality of areas, and controlling flash photographing operation based on a result of the calculating.
A computer program product for supplying a control program for an illumination device, comprising
- receiving object light, converting the object light into luminance signals of a plurality of areas, calculating a histogram of a luminance distribution on the basis of the converted luminance signals of the plurality of areas, and controlling operation of an illumination device for illuminating an object based on a result of the calculating.
A computer program product for supplying a flash photographing control program, comprising
- receiving object light, converting the object light into luminance signals of a plurality of areas, calculating a histogram of a luminance distribution on the basis of the converted luminance signals of the plurality of areas, and controlling flash photographing operation based on a result of the calculating.
Dependencies are inferred from the claim text.