Image processing apparatus and image processing method
US9374508B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Feb 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4092
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image is sharpened without generating, in frequency domain exceeding frequency component in horizontal and vertical direction, frequency component caused by sharpening carried out in horizontal and vertical direction in overlapping manner. An image processing apparatus includes: a vertical filter removing high frequency portion in vertical direction; a horizontal sharpening processing unit generating harmonic in horizontal direction containing frequency higher than frequency component in horizontal direction of the input signal; a horizontal filter removing high frequency portion in horizontal direction; and a vertical sharpening processing unit generating harmonic in vertical direction containing frequency higher than frequency component in vertical direction of the input signal, wherein a horizontal direction processing unit in which the vertical filter is disposed before the horizontal sharpening processing unit and a vertical direction processing unit in which the horizontal filter is disposed before the vertical sharpening processing unit are connected in series, or in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.