High dynamic range image generation and rendering
US8606009B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | May 20, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/513
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques and tools for high dynamic range (HDR) image rendering and generation. An HDR image generating system performs motion analysis on a set of lower dynamic range (LDR) images and derives relative exposure levels for the images based on information obtained in the motion analysis. These relative exposure levels are used when integrating the LDR images to form an HDR image. An HDR image rendering system tone maps sample values in an HDR image to a respective lower dynamic range value, and calculates local contrast values. Residual signals are derived based on local contrast, and sample values for an LDR image are calculated based on the tone-mapped sample values and the residual signals. User preference information can be used during various stages of HDR image generation or rendering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.