| 摘要 |
An image scanner has both a flat bed (FB) type structure and an automatic document feeding (ADF) type structure, and includes: an image read unit (1) at least including a lamp, a mirror and CCD sensors to read a manuscript which is put on the structure; an image control unit (2) operatively connected to the image read unit to process an image read by the image read unit; a host computer operatively connected to he image control means. The image control unit includes a main printed-circuit board (20) provided for the original functions of the image scanner, a main connector (21) connecting the image control means to the host computer, a user printed-circuit board (23) selectively provided by a user as an extended slot and the board being mounted within the image control unit, and a user connector (22) connecting the main printed-circuit board to the user printed-circuit board. Further, in one embodiment the image scanner has a function of correction for a difference in an image output between the FB type and the ADF type by adjusting a change rate from the white/black reference level, the gain of the amplifier, the lamp current, or a predetermined conversion formula. <IMAGE> |
