Digital camera recording dynamic range compression information
US7286167B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2003 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jan 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/134
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital camera has a feature to photograph a subject and record the image data onto a recording medium in a dynamic range wider than that required for printing, the digital camera further having a feature to store tag information into an image file, together with the image data, and record the image file onto the recording medium, the tag information including: range compression information indicating whether dynamic range compression has been made; maximum range information indicating the maximum subject reflection factor before and after the dynamic range compression; and knee point information indicating the subject reflection factor assumed when the dynamic range compression was made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.