Images with spatially varying spatial and gray level resolution
US6091511A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1997 |
| Grant date | Jul 18, 2000 |
| Priority date | — |
| Expiry date | Aug 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing method comprising: providing a digital, continuous-tone, input image represented by an array of pixels, the array having a predetermined pixel resolution and each pixel having a gray level; dividing the array of pixels into a plurality of sub-arrays of pixels; determining a gray level contrast for each of the sub-arrays; if the gray level contrast of a given sub-array exceeds a preselected threshold, generating a high resolution, narrow gray level range, sub-array corresponding to the given sub-array; and if the gray level contrast of the given sub-array is below the preselected threshold, generating a low resolution, wide gray level range, sub-array corresponding to the given sub-array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.