×

Data processing apparatus having enlargement/reduction functions capable of setting different magnification in different directions

  • US 4,893,258 A
  • Filed: 01/27/1988
  • Issued: 01/09/1990
  • Est. Priority Date: 01/28/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A data processing apparatus comprising:

  • means for displaying data to be processed;

    first designating means for designating an amount of either an enlarging or reducing magnification ratio in a vertical direction of said data displayed on said displaying means;

    second designating means for designating an amount of either an enlarging or reducing magnification ratio in a horizontal direction of said data displayed on said display means; and

    means for changing a displayed size of said data displayed on said displaying means in accordance with said amount of either the enlarging or reducing magnification ratio in a vertical direction designated by said first designating means and said amount of either the enlarging or reducing magnification ratio in the horizontal direction designated by said designating means;

    wherein said first designating means includes;

    means for generating first conversion ratio data representing either the enlarging or reducing ratio in the vertical direction of said data;

    first conversion ratio memory means for storing the first conversion ratio data;

    fixing means for calculating first physical positions of pixels of the data before either enlargement or reduction operation of the data is performed, calculating second vertical positions of the pixels of the data after either the enlargement or reduction operation of the data is performed in accordance with the first vertical positions of the pixels and the first conversion ratio, and calculating either an enlargement or reduction ratio of the data to obtain vertical position determination signals; and

    computing means for computing vertical position data of object pixels after either the enlargement or reduction of the data is performed based on the vertical position determination signals and vertical reference pixels extracted from the pixels of the data before either the enlargement or reduction of the data is performed; and

    wherein said second designating means includes;

    means for generating second conversion ratio data representing either the enlarging or reducing ratio in the horizontal direction of said data;

    second conversion ratio memory means for storing the second conversion ratio data;

    fixing means for calculating first horizontal positions of pixels of the data before either enlargement or reduction operation of the data is performed, calculating second horizontal positions of the pixels of the data after either the enlargement or reduction operation of the data is performed in accordance with the first horizontal positions of the pixels and the second conversion ratio, and calculating either an enlargement or reduction ratio of the data to obtain horizontal position determination signals; and

    computing means for computing horizontal position data of object pixels after either the enlargement or reduction of the data is performed based on the horizontal position determination signals and horizontal reference pixels extracted from the pixels of the data before either the enlargement or reduction of the data is performed.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×