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Method, equipment and computer program of changed digital color image

A computer program and color image technology, applied in biochemical equipment and methods, typewriters, image communication, etc., can solve the problem of lack of fidelity of color tones, etc.

Inactive Publication Date: 2005-11-09
OCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] A problem with the known method is that the color shades obtained after transformation lack fidelity

Method used

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  • Method, equipment and computer program of changed digital color image
  • Method, equipment and computer program of changed digital color image
  • Method, equipment and computer program of changed digital color image

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Embodiment Construction

[0029] The invention is particularly useful for high quality reproduction of images captured with scanners or digital cameras. Image reproductions can be found at Figure 5 Execute on the printing device partially shown in . As shown in the figure, the inkjet printer includes a printer drum 40 driven to rotate in the direction of arrow A for conveying paper 42 serving as an image recording medium. The printhead 44 is mounted on a carriage 46 and is guided on guide rails 48 to move back and forth along the printer cylinder 40 in the direction of arrow B to scan the paper 42 . Printhead 44 includes four nozzles 50, one for each of the primary colors yellow, magenta, cyan and black. Ink is supplied to the head 50 from an ink container (not shown) through a pipe. On the side facing the paper 42 , each spray head 50 has a linear array 52 of nozzles. The head 50 is activated according to the image information of the image to be printed on the paper 42 . The signal is sent to pr...

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Abstract

A first digital colour image with pixels having colour values is transformed to a second digital colour image with pixels having transformed colour values, the colour values being defined in a selected colour space. Pixel clusters are formed for the first digital colour image whereby pixels of a pre-defined category are grouped into a particular cluster in the selected colour space. The colour values of the pixels in a particular cluster are transformed such that transformed colour values belong to a pre-defined area associated to the particular cluster in the selected colour space, the pre-defined area consisting of memory colours of the same pre-defined category. The second digital colour image can be rendered on a display screen or on a print medium.

Description

technical field [0001] The present invention relates to a method of transforming a digital color image wherein a first digital color image whose pixels have color values ​​is transformed into a second digital color image whose pixels have transformed color values ​​defined in a selected color space, the method includes the step of forming clusters for the first digital color image, thereby classifying pixels of a predetermined class into specific clusters of a selected color space. Background technique [0002] In various areas of the desktop distribution and graphics technology industries, it is highly desirable to reproduce some color images with a satisfying perceived quality. In other words, the reproduced image should please the viewer's vision. Digital image data may be computed with a computer system, generated from scans of photographic images, digital photography, or other sources. Digital color images can be reproduced on many reproduction devices such as printin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/281A61K31/7088A61K35/74A61K35/76A61K36/00A61K36/06A61K38/00A61K39/395A61K48/00A61P37/08C07K14/435C07K16/18C12N1/19C12N1/21C12N5/10C12N15/09C12P21/02C12Q1/68G01N30/88H04N1/62
CPCH04N1/628H04N1/62A61P37/08
Inventor C·M·-P·鲍斯特
Owner OCE TECH