Multiple density level stochastic screening system and method
US5696612A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | May 4, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40087
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image rendering system for generating discrete tone image data for representing continuous tone image data to be rendered by a rendering device. The continuous tone image data includes a plurality of pixel values each associated with a pixel. The rendering device renders a colorant in a plurality of colorant densities. The image rendering system comprises a threshold array, preferably stochastic, a colorant density array, and a colorant density supply arrangement. The threshold array comprising a plurality of threshold values. The colorant density array comprises a plurality of array elements, each associated with one of said pixel values and one of said threshold values. Each of the array elements identifies a particular one of a plurality of colorant density values each associated with one of the colorant densities rendered by said rendering device. The colorant density supply arrangement, for each pixel, uses the pixel value associated with the pixel and a threshold value from the threshold array to identify an array element of the colorant density array, whose colorant density value will be rendered by rendering device for the pixel in the rendered image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.