The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2005
Filed:
Mar. 10, 2000
Paul Raymond Higginbottom, Castle Hill, AU;
Eric Majani, Rennes, FR;
James Philip Andrew, Waverton, AU;
Paul Raymond Higginbottom, Castle Hill, AU;
Eric Majani, Rennes, FR;
James Philip Andrew, Waverton, AU;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of encoding an digital image () by a discrete wavelet transform (DWT) to a predetermined level of decomposition on a block by block basis, each block () having a specified size in number of coefficients, is disclosed. The image is divided into tiles, each having dimensions required to produce the number of coefficients in a first dimension of the transformed block at the predetermined level of decomposition, and less than the number of coefficients in a second dimension of the transformed block. At a particular DWT level, tiles are decomposed. HH, HL and LH subband coefficients are accumulated to form blocks of specified size, and these are encoded to a bit stream (). A predetermined number of associated LL subband coefficients are similarly accumulated, the process performed recursively per DWT level until the predetermined decomposition level is attained, and the corresponding LL subband coefficients encoded to the bit stream ().