Image forming apparatus, image forming method, image density measuring apparatus, and image density measuring method
US8964246B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2011 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jul 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus includes a control section extracting a color composition of each color ranging from a first to an nth color from input image data, on the color composition of an mth color, the m being 1 to n−1, performing a first and a second gamma corrections correcting a gradation of the color composition respectively based on a gamma curve for the mth color to obtain a first corrected gradation value, and based on a gamma curve for an (m+1)th color to obtain a second corrected gradation value, and interpolating the first and the second corrected gradation values to determine an output value for the color composition, on the color composition of the nth color, correcting a gradation of the color composition based on a gamma curve for the nth color to obtain an output value for the color composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.