Electronic camera
AssigneeSanyo Electric Co., Ltd.
InventorAkira Okasaka
Life of this patent
Estimating the term…
Abstract
A digital camera (10) includes a CCD imager (16). An image signal corresponding to an optical image is output from the CCD imager (16), and an incident light amount to the CCD imager (16) is restricted by an aperture unit (14). A CPU (40) adjusts an exposure time period of the CCD imager (16) on the basis of an average luminance value of a normal evaluation area assigned to the center of a screen out of the image signals output form the CCD imager (16). The CPU (40) also adjusts an aperture amount of the aperture unit (14) on the basis of an average luminance value of a specific evaluation area assigned to the end of the screen out of the image signals output form the CCD imager (16).
Claims8
An electronic camera, comprising:
- an imaging device for outputting an image signal corresponding to an optical image;
- an aperture member for restricting an incident light amount to said imaging device;
- a first adjustment means for adjusting an exposure time period of said imaging device on the basis of a first part image signal belonging to a first part area assigned to a center of a screen out of the image signals output from said imaging device;
- and
- a second adjustment means for adjusting an aperture amount of said aperture member on the basis of a second part image signal belonging to a second part area assigned to an end of the screen out of the image signals output from said imaging device.
An exposure control program which is executed by a processor of an electronic camera having an imaging device outputting an image signal corresponding to an optical image and an aperture member restricting an incident light amount to said imaging device, comprising:
- a first adjusting step for adjusting an exposure time period of said imaging device on the basis of a first part image signal belonging to a first part area assigned to a center of a screen out of the image signals output from said imaging device;
- and
- a second adjusting step for adjusting an aperture amount of said aperture member on the basis of a second part image signal belonging to a second part area assigned to an end of the screen out of the image signals output from said imaging device.
An exposure control method which is executed by an electronic camera having an imaging device outputting an image signal corresponding to an optical image and an aperture member restricting an incident light amount to said imaging device, comprising:
- a first adjusting step for adjusting an exposure time period of said imaging device on the basis of a first part image signal belonging to a first part area assigned to a center of a screen out of the image signals output from said imaging device;
- and
- a second adjusting step for adjusting an aperture amount of said aperture member on the basis of a second part image signal belonging to a second part area assigned to an end of the screen out of the image signals output from said imaging device.
Dependencies are inferred from the claim text.