Imaging system with scaling/normalizing
US5999663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1994 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Sep 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An arrangement for extracting and processing image data to form an array of re-scaled pixel data, this arrangement being part of a Normalizer/Scaler stage in an image lift/processing system, and including: a scaler for storing N different selectible scaling algorithms; a scaler-output; an input for receiving scanned lines of pixel data and feeding it sequentially line-by-line, pixel-by-pixel to the scaler, the input including "scale factors" for selecting an algorithm; while the scaler includes a mapping stage for executing a two-dimensional mapping of adjacent pixel values and adjacent scanline values; this arrangement also including a command store for storing scaling algorithms, with a command register input for the scale factors. Preferably the scaler also includes a First ROM for storing pixel values at prescribed addresses; a Second ROM for similarly storing previous pixel values, being input in parallel with the First ROM; a Latch to which the ROMs are output; and a pixel Counter reset with each new scan line; with a "current pixel" value input to a prescribed address in the First ROM, along with a "pixel count" number from the Counter, plus an associated scale factor; with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.