Patent ID: 6025933
Filing Date: 2000-02-15
Classification: H04N

Abstract:
An image pickup apparatus comprising:(A) a light source for illuminating an object;(B) image pickup means for picking up an image of the object illuminated by said light source and outputting image signals of a plurality of colors;(C) adjustment means for adjusting a light amount of said light source;(D) a plurality of amplifier means respectively for amplifying said image signals of the plurality of colors output from said image pickup means; and(E) control means for when said image pickup means picks up a reference density member, setting gains of all of said plurality of amplifier means to substantial maximums respectively, controlling said adjustment means to adjust light amount of said light source so that all of maximums of said image signals of the plurality of colors output from said plurality of amplifier means exceed a predetermined value, and subsequently controlling the gains of said plurality of amplifier means so that all of the maximums of said image signals of the plurality of colors output from said plurality of amplifier means become substantially equal to said predetermined value.