Reduction/enlargement processing system for an image processing

Details Reduction/enlargement processing system for an image processing Reduction/enlargement processing system for an image processing

1989-11-30

1993-02-23

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358428, 358448, H04N 1393

Patent

active

051895293

ABSTRACT:
A reduction/enlargement processing system for an image processing apparatus of the type in which a line sensor is moved in a secondary scan direction while an image on an original is read by the line sensor in a main scan direction, comprising, line buffers for retaining image data for two lines, an interpolation processing circuit for applying a 2-point interpolation to the image data when the image data is written into or read out of the buffers, and a control circuit for controlling the writing data to and read data from the buffers and the interpolation circuit. Further, selectors are provided on the data input side and the data output side, and on the buffer side. The interpolation circuit is connected between the selectors. The line buffers are alternately selected for the read/write of image data. With use of the selectors, the 2-point interpolation may be applied to the image data or the image data may be directly processed. This provides a simple data processing that is performed in accordance with the reduction/enlargement mode.

REFERENCES:
patent: 4712141 (1987-12-01), Tomohisa et al.
patent: 4809345 (1989-02-01), Tabata et al.
patent: 4893258 (1990-01-01), Sakuragi
patent: 4920571 (1990-04-01), Abe et al.
patent: 4933775 (1990-06-01), Shimura
patent: 5029017 (1991-07-01), Abe et al.

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