Patent · US Expired

Image transfer optimisation

US7212678B2 · kind B2 · utility

17Cited by

8References

19Claims

0Family size

Assignee

Canon Kabushiki Kaisha · JP

Inventors

Craig M. Brown · Parramatta, AU
James Philip Andrew · Fawn Drive, AU
Patrice Onno · Rennes, FR

Key dates

Filing date	Oct 25, 2001
Grant date	May 1, 2007
Priority date	—
Expiry date	Sep 16, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG06T9/007
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method of retrieving an image for display is disclosed. The image is stored in a compressed wavelet-based format having blocks encoded substantially independently. Initially, a representation (1300) of the image is provided at a first (low) resolution (1302). The user can then select a portion (1308) of the representation for reproduction at a predetermined, generally a second (higher), resolution. A first set of blocks is then identified (1322) corresponding to the selected portion(1310), which are then retrieved, decompressed and rendered to display. A second set of blocks (associated with the first set of blocks) is then identified (1326–1340), retrieved and decompressed. The rendered first set of blocks is then modified using the decompressed second set and displayed at the predetermined/second resolution.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.