Image transmission for low bandwidth with region of interest
US6882755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2001 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Oct 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4728
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method of transmitting an image adapted to a first display area size, such as a standard computer screen having a particular pixel-by-pixel resolution, to an apparatus having a smaller second display area size by scaling the image through coefficient cropping its frequency domain representation. When the cropped frequency coefficients are used to display an image within the second smaller display area, a scaled version of the image is displayed. In a specific embodiment, frequency domain coefficients are cropped such that a region of interest of the image is scaled down less than the remainder of the image when displayed in the second smaller display area. Scaling in this manner provides the user with a readable region of interest with the remainder of the image scaled down so as to facilitate easy image navigation by the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.