Image reader

Details Image reader Image reader

1996-10-24

1999-09-07

Tran, Phuoc

Image analysis

Image transformation or preprocessing

Changing the image coordinates

382296, 382299, 348561, 348581, 348704, 358451, 36471507, G06K 932, H04N 544, H04N 974, H04N 1393

Patent

active

059499230

ABSTRACT:
In an image reader, a main scanning start point of a magnification-changing processing is stored in a main scanning start point register. An increment corresponding to a magnification-changing ratio is stored in an incremental register. A pixel number to be outputted as a magnification-changing output is stored in a multiple-changing output pixel number register. A pixel counter counts the number of pixels to be outputted as the magnification-changing output. An adder serially adds an increment to the main scanning start point and outputs it to a latch. A line memory stores original image data to be read, and the sum of the output value of the latch and +1 is given as a read address. A mean value arithmetic unit calculates a mean value of two adjacent pixels and outputs it as data after the magnification-changing processing.

REFERENCES:
patent: 4827433 (1989-05-01), Kamon
patent: 4878126 (1989-10-01), Ichikawa
patent: 5001768 (1991-03-01), Mita et al.
patent: 5036545 (1991-07-01), Iida et al.
patent: 5191623 (1993-03-01), Moriya
patent: 5424852 (1995-06-01), Funada
patent: 5465166 (1995-11-01), Kamo
patent: 5465305 (1995-11-01), Ueno
patent: 5608541 (1997-03-01), Yamada

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