×

Method and apparatus for evaluating a scale factor and a rotation angle in image processing

  • US 6,549,683 B1
  • Filed: 05/02/2000
  • Issued: 04/15/2003
  • Est. Priority Date: 05/02/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for evaluating a scale factor and a rotation angle in image processing, comprising the steps of:

  • (a) providing an input image;

    (b) reducing the input image to provide a smaller image;

    (c) scaling the smaller image according to a plurality of factors to produce a plurality of scaled images;

    (d) rotating the smaller image according to a plurality of factors to produce a plurality of rotated images;

    (e) placing the scaled images and the rotated images into a mosaic arranged by scale and rotation;

    (f) providing a reference template;

    (g) correlating said reference template with said mosaic of scaled and rotated images; and

    (h) providing a scale factor and a rotation angle based on the position in the mosaic of the highest correlation value between the reference template and the scaled and rotated images.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×