System and method for displaying a color image using vector error diffusion
US5561751A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/001
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for displaying a color image with a display device using vector error diffusion. Each pixel of the color image is represented by an active color vector, which typically, but not necessarily, is an RGB (red, green, blue) triplet. Often, the display device cannot display the exact color vector desired, so it displays the closest active color to the desired color, thereby resulting in an error vector for each pixel. The method computes the error vector by vector subtracting a color vector representing the active color displayed from the color vector of the desired color. The computed error vector is diffused to adjacent pixels by adjusting the color vectors of the adjacent pixels by fractions of the computed error value. Preferably, the method characterizes each color that can be displayed on the display device by measuring the color directly using a colorimeter which eliminates errors caused by non-linear combinations of the color coordinates of the color vectors. Preferably, the method also adjusts the desired color vector for each pixel to compensate for color bleeding between pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.