Image processing apparatus, image processing method, and program
US10915999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 2017 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Oct 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are an apparatus and a method for generating a high quality SDR image without significant reduction in image average luminance by matrix conversion for an HDR image. An image signal processing unit that converts the HDR image into the SDR image converts a pixel value of the HDR image into a pixel value of the SDR image, applying one conversion matrix to low luminance region pixels having luminance that is a prescribed threshold or less among constituent pixels of the HDR image. A high luminance region pixel having higher luminance than the prescribed threshold is set as a highest output pixel of the SDR image after conversion. The conversion matrix to be applied is a matrix having setting in which a change rate of a memory color set in a Macbeth color chart becomes smaller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.