Patent ID: 6292169
Filing Date: 2001-09-18
Classification: G06F,G06K,H04N

Abstract:
An information input apparatus for obtaining a difference image between object images corresponding to irradiated and non-irradiated states, comprising:a light emitter for irradiating an object with light;an area image sensor having imaging units constructed by a two-dimensional matrix of a plurality of light-receiving elements that perform photoelectric conversion, and a plurality of charge coupled device (CCD) type charge transfer sections for transferring and outputting charges obtained by said imaging units; andcontrol means for controlling charge transfer timings from the light-receiving elements to the CCD type charge transfer sections to alternately arrange charges received when said light emitter emits light and charges received when said light emitter does not emit light in a predetermined sequence in all or the individual CCD type charge transfer section of said area image sensor.