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Method of and apparatus for generating reduced image

  • US 5,615,281 A
  • Filed: 12/14/1994
  • Issued: 03/25/1997
  • Est. Priority Date: 09/26/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for generating a reduced image based on original image data representing an original image having linework including plural pixels, the original image data including pixel data for each pixel in said original image, each said pixel data expressed in one of plural color codes, the apparatus comprising:

  • an image memory for storing original image data representing said original image, said original image being divided into a plurality of regions each having a predetermined shape;

    a priority memory for storing an order of priority of said color codes;

    extraction means for extracting only one representative pixel data from plural pixel data within each region of a predetermined shape in said original image according to said order of priority, wherein said extraction means includes judging means for judging whether said color code of each of said plural pixel data is stored in said priority memory and representative pixel data selection means for selecting said only one representative pixel data having a color code with a highest priority according to said order of priority when at least one said color code is stored in said priority memory; and

    reduced image generation means for receiving said extracted only one representative pixel data and displaying a reduced image without omission of lines in the linework based upon said extracted only one representative pixel data for each region in said original image,said representative pixel data selection means of said extraction means further comprising;

    means for selecting pixel data at a predetermined pixel position in each region as said representative pixel data when said color code is not stored in said priority memory.

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