Patent ID: 7236270
Filing Date: 2007-06-26
Classification: H04N

Abstract:
1. A method of setting reference data of shading corrections comprising: a white reference image input step of inputting a white reference image to an image sensor with a light source lit up; a white reference setting step of setting white reference data every effective photosensor element by inspecting output signals of the image sensor as to the white reference image; a black reference image input step of inputting a black reference image to the image sensor with the light source extinguished after the white reference image input step; a black reference setting step of setting black reference data every effective photosensor element by inspecting output signals of the image sensor as to the black reference image; and a reading step of lighting up the light source after the black reference image has been inputted and before the setting of the black reference data is finished, starting inputting an optical image of a subject to the image sensor before luminous intensity of the light source is stabilized, and outputting image data outputted to the shading corrections with the white reference data and the black reference data.