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Method for realizing digital printing color correction by modifying character file

A characteristic file and color correction technology, applied in the direction of image communication, electrical components, etc., can solve the problems of poor accuracy, unstable effect, high experience and technical requirements, so as to get rid of the dependence on experience, high color correction accuracy and wide adaptability Effect

Active Publication Date: 2017-11-24
JIANGSU ZHENGHONG COLOR PRINTING CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, these two kinds of corrections are based on the subjective feelings of the human eye, so the accuracy is poor, the operator's experience and technical requirements are high, and the effect is not stable.

Method used

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  • Method for realizing digital printing color correction by modifying character file
  • Method for realizing digital printing color correction by modifying character file
  • Method for realizing digital printing color correction by modifying character file

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Printing technology can be divided into traditional printing technology with printing plate and digital printing technology without printing plate. A digital printing machine includes a control computer and a printing device, etc. A common color management process of a digital printing machine is as follows: figure 1 As shown, the control computer reads the digital file, converts it into a device-independent color value according to the specified source characteristic file, and then converts it into a device-related color value according to the characteristic file of the current printing device. Control ink levels. In theory, through color management, the printed color can simulate the color of the original, but in actual production, due to various equipment and materials, the printed color may deviate from the color of the original be...

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Abstract

The invention discloses a method for realizing digital printing color correction by modifying a character file. The method comprises the following steps: printing a corresponding characterized color code image according to a source character file of a to-be-printed digital file, measuring the L*a*b* value of each color lump, finding out the L*a*b* value of partial color lump with small aberration with the target color lump from the printing color lumps for the target L*a*b* value of each color lump, and then finding out the L*a*b* value of the corresponding color lump in the source character file, establishing a mapping relation by using a polynomial least square regression method, and then computing to obtain the correction value of the corresponding color lump in the source character file by taking the target L*a*b* value as the independent variable; replacing the original source character file by using the corrected feature file, and appointing to the to-be-printed digital file to print. The high-precise and convenient color correction method for digital printing is realized through the method disclosed by the invention.

Description

technical field [0001] The invention relates to the technical field of quality control in the printing process, in particular to a color correction method for digital printing. Background technique [0002] Digital printing refers to the use of computers to read digital files and directly complete the reproduction of images without the need to make printing plates. At present, common methods include electrostatic photography and inkjet. When a digital printing machine reads a source file in RGB mode or CMYK mode, the operator needs to specify a characteristic file for the color information in the source file. The operator can select the property file embedded in the source file as the source property file, and can also designate other property files as the source property file of the source file. The digital printing machine converts the device-related color information in the source file into device-independent color information according to the specified source characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60
CPCH04N1/6075
Inventor 余节约田培娟戴萍
Owner JIANGSU ZHENGHONG COLOR PRINTING CO LTD
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