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Image signal interface system

  • US 5,359,702 A
  • Filed: 10/29/1992
  • Issued: 10/25/1994
  • Est. Priority Date: 08/31/1988
  • Status: Expired due to Term
First Claim
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1. An image signal interface system for use between a plurality of image signal sources having different γ

  • characteristics and a single image output device for producing a hard copy based on an image signal produced by one of the image signal sources at a time, said image signal interface system comprising;

    a plurality of selectable γ

    correcting tables for converting the image signals from the image signal sources to image signals which match the γ

    characteristics of the image output device;

    at least one density coefficient table for varying at least the maximum density and contrast of the image signals from the image signal sources;

    a lookup table setting unit for converting the image signals from one of the image signal sources according to correction data from said γ

    correcting table and said density coefficient table corresponding to said one of the image signal sources such that γ

    correction and gradation correction occur simultaneously in said lookup table setting unit; and

    control means for initiating transmission of said image signals from said one of the image signal sources and for supplying information from said plurality of γ

    correcting tables and from said at least one density coefficient table to said lookup table setting unit.

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