Image generating device, image generating method and printing device
US8040566B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | May 12, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image generating method comprises the steps of extracting elliptical shape parameters (specifying an elliptical shape), gradation pattern parameters (specifying a gradation pattern to be drawn in the elliptical shape) and drawing area parameters (specifying a drawing area) from an instruction for drawing an elliptical radial gradation, generating a transformation matrix for transforming the elliptical shape into a perfect circular shape based on the elliptical shape parameters, calculating an inverse matrix of the transformation matrix, transforming the gradation pattern parameters using the transformation matrix, transforming a first area containing the drawing area using the transformation matrix, drawing a radial gradation in the perfect circular shape in a second area containing the transformed first area based on the transformed gradation pattern parameters, and generating the elliptical radial gradation for the drawing area by inversely transforming the second area (in which the radial gradation has been drawn) using the inverse matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.