Image processing apparatus
US8228562B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jan 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40075
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Described is an image processing apparatuses, which makes it possible to accurately remove a periodicity from a halftone dot pattern included in an image. The apparatus includes: a periodicity pattern analyzing section to acquire periodicity information indicating the periodicity of the halftone dot pattern; a smoothing area determining section to determine a smoothing area, constituted by either a pair of rectangular areas contacting with each other or a single rectangular area, based on the periodicity information; a spatial filter creating section to create a spatial filter within which the smoothing area is includible, and in which a weighted coefficient of each of pixels is established corresponding to an overlapping area of a concerned pixel overlapping with the smoothing area; and a smoothing calculation section that applies a convolution arithmetic calculation processing to the image data representing the processing objective image with the spatial filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.