Method of correcting printer spectrum characterization model

A spectral feature and printer technology, applied in color/spectral feature measurement, printing, computer parts, etc., can solve the problems of waste of consumables such as ink and paper, reduced accuracy of spectral characterization models, and inconformity with energy conservation and environmental protection. Effects of waste and inconvenience, compensation for loss of accuracy

CN102180003AInactive Publication Date: 2011-09-14ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method of correcting a printer spectrum characterization model. The method can substantially improve the situation that precision of a spectrum characterized model is reduced due to changes of printing environment, such as ink, paper, temperature, air humidity, etc, and the method is applicable to a plurality of printer spectrum characterized model. The method comprises selecting 20 to 50 correcting samples (reflectivity of ink formula to spectrum) which basically cover colour gamut of the printer, printing and measuring under a new printing environment, after comparative analysis, obtaining corresponding correction factors of forward wavelength and reverse wavelength to correct an input or output parameter of the original spectrum characterized model, and finally realizing a precise prediction of the original forward and reverse spectrum characterized model under the new printing environment. The method avoids cost and inconvenience brought by remodeling, meanwhile overcomes the problem that the precision of the model is substantially reduced due to changes of printing environment. Besides, the method is easy to implement.
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Description

technical field

[0001] The invention relates to a method for correcting a spectral characterization model of a printer, in particular to a method for correcting a reduction in the precision of a spectral characterization model caused by printing environment changes such as different inks, papers, temperature and air humidity. Background technique

[0002] Printer spectral characterization models typically include both positive and negative directions. The forward spectral characterization model refers to the establishment of the relationship between the device-related ink formulation (such as digital device drive values ​​of cyan, magenta, yellow, and black) and the device-independent spectral reflectance; conversely, it is called Characterize the model for the inverse spectrum. Since one often expects a certain color to be available through printing, the reverse model is generally more practical. The establishment of printer spectral characterization models often requires...

Examples

Embodiment

[0031] Taking a CMYK (cyan, magenta, yellow, black) four-ink printer as an example, the specific implementation method of the above characterization model correction method is described. It should be noted that the present invention is not limited to four-ink printers, and is applicable to correction of spectrum-based characterization models of various multi-ink printers.

[0032] The establishment of a printer spectral characterization model based on a certain printing environment is a prerequisite for model correction. There are two types of forward spectral characterization models for printers: model method and empirical method. The model method is to simulate the coloring mechanism of the equipment through a physical model, and establish the corresponding relationship between the ink formula and the spectral reflectance, such as the Kubelka-Munk model, the Clapper-Yule model, the Neugebauer model, and the Cellular Yule-Nielsen Neugebauer model. Orientation models are ofte...