×

Curved wavelet transform for image and video compression

  • US 7,418,144 B2
  • Filed: 03/01/2005
  • Issued: 08/26/2008
  • Est. Priority Date: 03/03/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of image transformation comprising:

  • transforming an n-dimensional image, wherein n≧

    2, into a wavelet-transformed image comprised of wavelet coefficients by performing one-dimensional wavelet transformations on image values along a plurality of curved paths dependent upon content of the image, using the steps of;

    a) determining the plurality of curved paths within the image;

    b) determining image values along each of the curved paths;

    d) performing the one-dimensional wavelet transformations on the image values along the curved paths using a low-pass 1-D wavelet filter and a high-pass 1-D wavelet filter along each of the curved paths to obtain a low-pass filtered image comprised of low-pass wavelet coefficients and a high-pass filtered image comprised of high-pass wavelet coefficients; and

    ,e) down-sampling the low-pass and the high-pass filtered images along the first coordinate to obtain down-sampled low-pass and high-pass filtered images.

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