High resolution image compression methods and apparatus
US5127064A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Feb 13, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/403
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides methods and apparatus for rapid compression of images composed of pixels into high-resolutions, compressed icon images, and for dynamic fault imaging of operating faults in integrated circuit devices employing such methods. Displaying a plurality of such icons juxtaposed on a screen permits ready tracing of a fault in an IC device under test, even by persons having little knowledge of the functionality of the devices. In accordance with the invention, an image made up of n.times.n pixels may be compressed into an icon of p.times.p pixels, where n.dbd.P.multidot.q and q is an integer, by dividing the image into p tiles of q.times.q pixels, selecting q pixels from each tile, where each of said selected q pixels is representative of predetermined directional orientations within the tile, and calculating the mean value of the selected q pixels, to produce a single pixel representative of the tile. The pixels representative of said tiles thus form an icon of p.times.p pixels. Each of the selected q pixels is preferably uniquely representative of a horizontal row of q pixels, a vertical column of q pixels, and a pair of mutually-orthogonal diagonal lines of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.