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Color copying method

A technology of color and tone, applied in the direction of color separation/tone correction, photographic plate-making process of pattern surface, instruments, etc., can solve problems such as missing user judgment

Inactive Publication Date: 2004-07-07
WEYERHAEUSER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When getting the final result, this method takes more computing power into consideration but leaves out some of the user's judgment
[0006] So far, there is no really satisfactory way to approach full color images using only two inks

Method used

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Examples

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Embodiment Construction

[0029] Detailed Description of Preferred Embodiments

[0030] In the following description, terms such as "record", "separate" and "channel" are used somewhat interchangeably. When halftone printing plates originated from the use of photographic contact negatives, the term "image record" was introduced in color process printing. The production of radiant colors by devices or objects that emit or generate their own light (sun, television, etc.) involves additive color systems. Red, green, and blue are well-known additive primary colors ( figure 1 ). An incredible number of colors can be produced and differentiated by mixing these primary colors in varying amounts. Landscapes and images were recorded through separate photography through red, green, and blue filters. These provide a negative grayscale record of the spectral components. For example, a red record (negative) defines the amount and position of cyan ink (red's complementary color). Similarly, the red-recorded po...

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PUM

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Abstract

A color print method using only two transparent inks to copy original image includes such steps as regulating the contrast, brightness and color balance of original digital image coded by red, green and blue, coverting it to be coded by green, fuchsin and yellow, choosing two channels from these channels for representing the channels of the master colours of original image to the best, determining the key colors to be precisely copied in original image, choosing the relative colors from the ink palette, designing the colors to chosen channels, overlapping two channels to form a synthetic image, regulating gray scale, generating the separated colors of positive film, and transforming to image on negative film.

Description

[0001] The present invention relates to a color separation method that converts an original red-blue-green encoded image into a two-pass encoded image that can be tinted with two transparent inks while maintaining remarkable fidelity to the original image. The ink may or may not be a colored ink. The third channel, which is not ultimately printed, can be used to simulate intermediate colors. This allows the grayscale values ​​of the other two channels to be adjusted accordingly for optimal performance. Alternatively, a third pass can be used to define an opacity mask image to be printed before or after the two transparent inks are printed. Background of the invention [0002] Color imaging in figurative art has been established for many years. In the past, halftone plates were typically produced by photographing an image through separate red, green, and blue filters. This negative serves as a color separation positive for each ink. The printing inks used for these plates a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/21B41M1/14B41M3/00G01D11/00G03F3/00H04N1/56
CPCH04N1/56
Inventor 戴维·L·李休·韦斯特
Owner WEYERHAEUSER CO
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