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Method and apparatus for determining a motion vector

  • US 5,682,438 A
  • Filed: 06/21/1995
  • Issued: 10/28/1997
  • Est. Priority Date: 06/21/1994
  • Status: Expired due to Fees
First Claim
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1. An image motion vector detection method of detecting a motion vector representing movement of an objective area in a first image of a plurality of successive images, said method comprising:

  • an objective area determining step of determining the objective area in the first image;

    a polynomial determining step of determining both a degree and the number of terms of a polynomial, said polynomial including a variable corresponding to predetermined coordinates within said first image, the polynomial approximately expressing a distribution of the sum of the differences between comparison areas determined in a second image and the objective area of said first image;

    a comparison area determining step of determining both the number and positions in the second image of the comparison areas, which are sufficient for determining coefficients for the terms in the polynomial;

    a total sum of the differences calculating step for obtaining a value of the n-th power of a total sum of the differences of the objective area and the comparison area with respect to the plurality of comparison areas by using a predetermined power n;

    a coefficient calculating step for calculating the coefficients of the polynomial by using the values of the n-th power of the total sums; and

    a minimum value calculating step of obtaining coordinates, in which a minimum value is obtained in the polynomial having the calculated coefficients, as coordinates of an area in the second image representing movement of the objective area.

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