Multi-bit rendering method and arrangement for continuous tone picture representation and printing
AssigneeEastman Kodak Company
InventorHwai-Tzuu Tai
Life of this patent
Estimating the term…
Abstract
A method and arrangement for reproducing an original image, scans and digitizes an original image into pixels of a digitized image. A dot template, a bit-depth, and a dot type structure are selected. A set of gray dot patterns are generated from the dot template, pixel bit-depth and dot type structure that are selected. A 4-quadrant tone reproduction on the set of gray dot patterns is then performed to produce a set of thresholding values at each pixel of the digitized image. A first signal corresponding to a gray level halftoned representation of the digitized image using the thresholding values is then produced. From the first signal, a gray level halftoned reproduction of the original image is printed.
Claims10
An arrangement for reproducing an original image, comprising:
- a scanner which scans and digitizes the original image into pixels;
- a controller coupled to the scanner to receive the digitized original image, and which produces a first signal corresponding to a gray level halftoned representation of the digitized original image;
- and
- a printer coupled to the controller to receive said first signal and which produces a gray level halftoned reproduction of the original image;
- wherein the controller includes means for obtaining a set of thresholding values at each pixel from a specified set of gray dot patterns by 4-quadrant tone reproduction.
A method of reproducing an original image, comprising:
- scanning and digitizing an original image into pixels of a digitized image;
- selecting a dot template;
- selecting a bit-depth;
- selecting a dot type structure;
- generating a set of gray dot patterns from the dot template, pixel bit-depth and dot type structure selected;
- performing 4-quadrant tone reproducing on the set of gray dot patterns to produce a set of thresholding values at each pixel of the digitized image;
- producing a first signal corresponding to a gray level halftoned representation of the digitized image using the thresholding values;
- and
- printing from the first signal a gray level halftoned reproduction of the original image.
Dependencies are inferred from the claim text.