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Apparatus and method for picture representation by data compression

  • US 5,510,838 A
  • Filed: 11/22/1994
  • Issued: 04/23/1996
  • Est. Priority Date: 03/22/1992
  • Status: Expired due to Fees
First Claim
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1. A process of picture representation by data compression which comprises the steps of:

  • subdividing the picture into regions;

    registering for each region a set of brightness values;

    fixing for each region a characteristic scale in terms of a number of pixels;

    dividing each region into cells, each of said cells comprising a number of pixels defined by two coordinates, said cells having a linear dimension in the order of said characteristic scale;

    identifying in each cell basic structures chosen from among smooth areas, positive and negative hills, and curvilinear structures chosen from among edges and ridges;

    constructing for said curvilinear structures geometric models comprising lines approximating the center lines of said structures and parameters defining the profiles of said structures;

    associating to each of said smooth areas, positive and negative hills and geometric models of curvilinear structures a mathematical model;

    condensing said mathematical models to define a global mathematical model for the cell;

    quantizing and encoding the data defining said global mathematical model; and

    storing and/or transmitting said data as representing the primary compression for the picture.

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