Method for correcting soft proofing display colors

Abstract

The invention provides a soft proofing display color correction method. The method comprises the steps: printing a color code image, and detecting the L * a * b * value of each color block; convertingthe RGB value and displaying the RGB value on a screen; respectively shooting and recording a color code image displayed on the screen and a hard copy color code image adhered to the surface of the screen by using a digital camera; extracting RGB values of color blocks in the digital photo; converting into an L * a * b * value; the L * a * b * value of the screen display color recorded by the camera is used as an independent variable; and establishing a mapping relationship by using the L * a * b * value dependent variable for detecting the hard copy, and obtaining an output value by using the L * a * b * value of the hard copy color block recorded by the camera as an independent variable for manufacturing a characteristic file of simulation equipment, so that the color displayed by the screen is consistent with the hard copy color. According to the method, the hard copy color, recorded by the camera, under the specific environment light source serves as the benchmark, the display color, recorded by the same camera, under the same environment light source is corrected, the display color is close to the hard copy color, and the accurate screen soft proofing effect is achieved.

Description

technical field [0001] The invention relates to the field of color proofing in the printing process, in particular to a method for using screen simulation to display hard copy colors as a color reference in the printing process. Background technique [0002] Soft proofing refers to the method of using the display screen to simulate and display the color of the hard copy to realize the color proofing of the image reproduction process such as printing. Compared with traditional digital proofing, soft proofing is easy to use, can save the cost of printing equipment and printing consumables, and save the time and cost of printing and sample transmission. [0003] However, in the existing open color management technology of the International Color Consortium ICC, when printing equipment is characterized, the L of the hard copy is calculated with the D50 standard illuminant and a 2° field of view as the observation condition. * a * b * However, in actual production, the ambient...

AI Technical Summary

Problems solved by technology

This method can make up for the influence of screen reflected light on the display effect to a certain extent, but by measuring the reflectivity of the screen at a certain angle and the ambient light radiation power, the calculated tristimulus value of reflected light and the actual impact of reflected light on the human eye The difference is large, and the correction effect is not ideal

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