Repeating band print artifact evaluation
US8243998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2010 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Apr 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30144
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for evaluating the severity in a printed image of a repeating band print artifact. After electronically capturing the printed image, each of a plurality of patches taken from captured image is analysed to produce an artifact severity measure for the patch; an overall artifact severity value is then determined for the printed image from the patch severity measures. The analysis of each patch involves producing a spatial intensity profile across the patch substantially at right angles to an expected direction of extent of any repeating band print artifact present; a Fourier-related transform is then applied to the spatial intensity profile and the patch artifact severity measure generated by summing the resultant spatial frequency coefficients in a limited range about a frequency of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.