Blue sky color detection technique
US8351724B2 · kind B2 · utility
1Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 2009 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Jan 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/628
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image enhancement technique includes a filter that receives an input image and provides a low-pass filtered image that maintains a substantial number of edges therein. The low pass filtered image is provided a likelihood of being a sky color for each pixel of the low pass filtered image. The low-pass filtered image is filtered based upon a user selection to selectively enhance the sky color. The low-pass filtered image and the filtered low-pass filtered image are blended based upon the user selection based upon the likelihood. The blended image is combined with a high pass filtered input image to provide an enhanced image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.