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Method of compressing and decoding shape-data

  • US 5,740,281 A
  • Filed: 12/27/1994
  • Issued: 04/14/1998
  • Est. Priority Date: 12/27/1993
  • Status: Expired due to Fees
First Claim
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1. A method of compressing shape-data used in an image generating apparatus, said method comprising:

  • a first step of inputting shape-data for a plurality of parts into the image generating apparatus, wherein the plurality of parts are obtained from partitioning a whole shape;

    a second step of obtaining a distribution of coordinate values of the shape-data for each part and determining quantizing parameters for quantizing each coordinate value of the shape-data for each part based on the respective distribution obtained;

    a third step of quantizing each coordinate value of the shape-data for each part using the quantizing parameters determined in said second step; and

    a fourth step of inputting part coordinate transformation parameters, which consist of data relating to the positional relationship of the plurality of parts, into the image generating apparatus and obtaining parameters of an inverse quantizing and coordinate transformation by calculating the part coordinate transformation parameters based on inverse quantizing parameters for inverse-quantizing the coordinate values which were quantized.

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