Image transform method for obtaining expanded image data, image processing apparatus and image display device therefor
US7397972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jan 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/403
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
It is an object of the present invention to output a clear, expanded image wherein step-shapes or chain-shapes of oblique lines are reduced, distortion is eliminated and no constituent lines of fonts or graphics are missing. An image transform method, for transforming original input image data into image data expanded by a ratio represented by a rational number or an integer, comprises: a vertical and horizontal interpolation unit, for reducing correlation in the vertical and horizontal directions of interpolated image data linearly expanded from an original image data input unit, and for generating first expanded image data; an oblique interpolation unit, for performing linear interpolation, based on correlation with a target pixel constituting the original image data and neighboring pixels arranged in oblique directions, using the neighboring pixels to generate second expanded image data; and a final result generator for employing the first expanded image data and the second expanded image data to generate a final image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.