Method for achieving newspaper printing soft-proofing color consistency

Abstract

The invention discloses a method for achieving newspaper printing soft-proofing color consistency. According to the method, a hard copy of a representative printing test chart is used, visual perception L*a*b* values of the hard copy under various region light source environments are calculated through detection, then L*a*b* values of the hard copy L*a*b* values which are displayed by displayers under a D50 illuminating body are calculated, the difference values of the hard copy vision L*a*b* values and the L*a*b* values displayed by the displayers are compared, the hard copy L*a*b* values are corrected until the difference values of the hard copy vision L*a*b* values and the L*a*b* values displayed by the displayers are smaller than the specified tolerance, the corrected L*a*b* values of the hard copy are used for making printing characteristic files, the corrected L*a*b* values are assigned to opened image files by application software, and accordingly the color of the same hard copy and the colors of the displayers at various region can be matched with each other in visual perception. Hence, printing enterprises which are distributed at different regions can conduct printing by referring to the same soft-proofing color approximately, and the color consistency of newspapers printed at various regions can be facilitated.

Description

technical field [0001] The invention relates to a method for realizing consistent color of newspaper printing soft-proofing, in particular to a method for realizing consistent color of screen soft-proofing in different regions when newspapers with the same content are printed in multiple regions. Background technique [0002] Newspapers are generally printed on rotary offset presses. In order to ensure the quality of color reproduction, it is necessary to provide standard proofs as the basis for color adjustment before the official printing and production of newspapers. For newspapers with a large circulation and a wide range of distribution, the same electronic file is often transmitted to multiple printing companies in multiple regions for simultaneous printing. In order to make the colors of newspapers printed by different companies as consistent as possible, each printing company should be provided with the same standard proof. Due to the timeliness requirements of news...

AI Technical Summary

Problems solved by technology

However, the existing screen soft-proofing technology based on open color management specifications realizes the conversion of output colors of different devices through a device-independent color space, which has strict requirements on the performance of the display and the viewing environment. Only when certain conditions are met, the color can be displayed However, the conditions of the newspaper printing workshop are difficult to meet this requirement, which makes it difficult to achieve a good visual match between the soft proof color presented on the display device and the hard copy color under a specific light source. Therefore, it is difficult for the existing soft proof technology to use its The advantages of distributed synchronous proofing meet the requirements of providing consistent reference proofs for printing companies in different regions

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