Image processing apparatus and image processing method
US9456106B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2015 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Oct 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4092
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a contour extracting unit, a contour processing unit, a dithering unit and a binarizing unit. The contour extracting unit extracts a contour pixel forming a contour part from pixels of image data having multiple gradation values. The contour processing unit performs adjustment to reduce a gradation value of the contour pixel extracted by the contour extracting unit. The dithering unit binarizes, by using a blue noise dither matrix, the gradation value of the contour pixel subjected to the adjustment by the contour processing unit. The binarizing unit binarizes, of the pixels of the image data, a gradation value of a non-contour pixel which is other than the contour pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.