Image processing method and image processing apparatus
US8131101B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2006 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Apr 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4072
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object of the invention is to adequately remove a halo in an image processing method and apparatus for conversion of an image into an image suitable for image recording and displaying by compression of the dynamic range of the image. As means for solution, an image processing method that compresses the dynamic range of image data includes: an input process of inputting image data; a low frequency component calculation process of calculating, for each pixel, a low frequency component of image data inputted through the input process; an image processing process of calculating an image-processed value for each pixel, according to the below-described equation; and an output process of outputting image data including the image-processed value calculated by the image processing process. Snp=a1·Snus+a2·(Snf−Snus), wherein Snp represents an image-processed value; a1 and a2 are represent factors (0<a1<1 and 0<a2<1); Snus represents a low frequency component, of each pixel, calculated through the low frequency component calculation process; and Snf represents an image data value, of each pixel, inputted through the input process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.