Still video camera and device for adjusting control data for amo

Details Still video camera and device for adjusting control data for amo Still video camera and device for adjusting control data for amo

1994-04-26

1995-08-01

Greening, Wendy R.

Television

Camera, system and detail

With object or scene illumination

354415, H04N 5235

Patent

active

054383676

ABSTRACT:
An amount-of-light-emission control data for controlling the amount of light-emission is corrected so that the amount of strobe light-emission becomes proper. In the adjustment process after manufacturing a digital still camera, a subject is placed in a predetermined position, and is photographed by determining a predetermined guide number GN. A guide number GN corresponding to the amount of light-emission of a strobe 45 is calculated from a video signal obtained by the photography. The predetermined actual guide number GN and the guide number GN corresponding to the actual amount of light-emission are compared with each other, to correct the value of control data for determining the amount of light-emission so that there is no difference therebetween. The corrected or updated value of control data in which the predetermined updated corrected guide number GN and the guide number GN corresponding to the actual amount of light-emission are approximately equal to each other is stored in a memory 6. At the time of actual photography, the updated corrected value of control data is read out from the memory 6 in conformity with the updated corrected guide number GN, and the data read out is applied to an amount-of-light-emission control circuit 30, so that a strobe flash is fired.

REFERENCES:
patent: 5231447 (1993-07-01), Takagi
patent: 5257063 (1993-10-01), Ishimura et al.

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