×

Block matching for picture motion estimation using gray codes

  • US 5,654,762 A
  • Filed: 05/01/1995
  • Issued: 08/05/1997
  • Est. Priority Date: 05/01/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of determining a best fit for block matching for motion estimation comprising the steps of:

  • quantizing each pixel of a reference block from a first picture frame in a sequence of picture frames and each corresponding pixel in a search area of a next picture frame;

    converting the quantized pixels each to a corresponding Gray code;

    comparing corresponding pixel values from the reference block and the search area to determine a match if the respective Gray codes are within one of each other;

    calculating a tally of the pixel pair matches within the reference block;

    repeating the quantizing, converting, comparing and calculating steps for each new position of the reference block within the search area; and

    identifying a block in the search area corresponding to the reference block which has the largest tally as the best fit.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×