Image scanner

Abstract

Abstract PURPOSE:To eliminate printing at an unnecessary part other than an original by detecting the position and size of the original placed on a platen, and extracting image information on only the original. CONSTITUTION:An original set on a platen is scanned, as shown by arrows D and E, by solid scanning elements 1 and 2 to read image information, which is transferred to A/D converters 14 and 15 by a clock generated by a clock generator 13, thereby storing A/D-converted information in registers 16 and 17. At this time, original-position counters CL and C2, and L1 and L2 inputting the clock counts the position of the original. Under the control of a readout control part 8, the contents of registers 16 and 17 are readout to a gate control part 9, which performs switching to obtain image information by a single serial scan, which is stored in an image memory 10 successively. Then, only image information on the original part in the memory 10 is readout to a user unit 12 under the control of the CPU11, thus eliminating printing at an unnecessary part other than the original.

Inventors

• 👤 Tadashi Yoshida

Bibliographic Details