Method for high-fidelity print outputting L*a*b* image

Abstract

The invention discloses a method for printing and outputting an L<*>a<*>b<*> image in a high-fidelity manner. The method is carried out according to the following steps: step 1, firstly arranging a CMYK electronic color target, and then measuring the L<*>a<*>b<*> value of each color block aiming at a colored output device and through taking the CMYK electronic color target arranged as an input image after being printed and output, and corresponding and storing the CMYK value and the L<*>a<*>b<*> value of each color block to obtain source data for describing the characteristic of the device; step 2, reading the data of the L<*>a<*>b<*> image and carrying out color gamut compression; and step 3, establishing color conversion relation between L<*>a<*>b<*> and CMYK to convert the L<*>a<*>b<*> image into a CMYK image, and printing and outputting. The invention has the advantages that a CMYK printer is taken as an output device, thereby achieving the highly-accurate conversion from the L<*>a<*>b<*> and the CMYK, and achieving the purpose of printing the L<*>a<*>b<*> image in a high-fidelity manner.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a high-fidelity print output L * a * b * image method. Background technique [0002] At present, various color images are mainly based on RGB, CMYK and L * a * b * Three color spaces for recording, RGB and CMYK are device-dependent color spaces, so this type of image can be directly output on devices such as monitors and printers; L * a * b * It is a uniform color space and a device-independent color space, so this type of image cannot be directly output by a color device. due to L * a * b * space is a non-device color space, so when outputting such an image, it must first be converted to a device color space value. However, at present, the CMYK printer is used as the output device, and the L * a * b * The conversion method to CMYK is complex and time-consuming, with low precision and large color differences, making it difficult to achieve high-fidelity prin...

AI Technical Summary

Problems solved by technology

[0003] The object of the invention is to provide a high-fidelity print output L * a * b * The image method solves the existing method to convert the image from L * a * b * The problems of complex time-consuming, low precision and large color difference in the process of converting to CMYK

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