Method and apparatus for lightness imaging
US4384336A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1980 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Aug 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/94
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention provides mechanisms that detect the large dynamic range of radiant intensities in the natural environment, that use novel strategies to calculate an approximation of visual properties of objects, and that represent a scene with an image having a specific dynamic range that is optimal for display media such as photography, television and printing. Photographs and other images are made according to the foregoing mechanisms from lightness fields produced from multiple comparisons between information associated with a different segmental areas of an image field. Different comparisons involve different groups of segmental areas, and different groupings have at least one spatial parameter different from other groupings of areas. Comparisons advantageously are made in succession with an ordered sequence of the spatial parameter and employing results of prior comparisons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.