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A method for evaluating digital printing definition of a silk fabric

A technology of digital printing and evaluation methods, applied in image data processing, instruments, calculations, etc., can solve the problems of high customer recognition rate, color block noise, unstable evaporation, etc., to achieve accurate clarity and clarity evaluation. Effect

Active Publication Date: 2019-03-01
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) The proofing effect is good, and the customer recognition rate is high. Digital printing and traditional printing belong to different systems. Many professional and technical personnel are worried that the proofing effect of digital printing machine is too good, and traditional printing cannot achieve such an effect. In fact, this kind of worry is unnecessary
(1) Front and back processing supporting issues: For all digital printing processing enterprises, front and rear processing are very important issues, especially for small workshop digital printing production enterprises, the most troublesome thing is the supporting problems of front and rear processing equipment
(2) Ink problem: more than 80% of the quality problems of digital printing are caused by ink, including the aforementioned unstable steaming, which has a lot to do with ink
(3) Digital printing still has the problem of "cloth running" and the problem of color block noise
At present, the research on the clarity of digital printing on fabrics generally focuses on the ink, the machine itself, etc., but there is little research on the clarity of digital printing on the structure of fabrics
Especially for digital printing on silk fabrics, the clarity of patterns has not been reported

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A method for evaluating digital printing definition of a silk fabric
  • A method for evaluating digital printing definition of a silk fabric
  • A method for evaluating digital printing definition of a silk fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] combine Figure 1 to Figure 13 Describe this embodiment in detail. The present invention relates to a method for evaluating the clarity of digital printing of silk fabrics, including printing positive lines, negative lines, circles, gradient strips and complex images on the selected silk fabrics, using positive lines, negative lines, circles, and gradient strips, using There is no reference image quality evaluation method for objective evaluation, and the printed complex patterns are subjectively evaluated.

[0084] Modulate printing ink, print positive lines, negative lines, circles, gradient strips and complex images on silk fabrics; print positive lines and negative lines in the warp and weft directions of silk fabrics, and the number of positive lines and negative lines is 11. The length of the line is not less than 1.27mm; the color of the gradient bar printed along the vertical direction is blue, pink, yellow and black.

[0085] In this embodiment, the selected ...

Embodiment 2

[0132] combine Figures 12 to 19 , a method for evaluating the clarity of digital printing of silk fabrics involved in this embodiment will be described in detail. The difference between the present embodiment and the first embodiment is that the printed positive lines, negative lines, circles, and gradient bars are objectively evaluated by a non-reference image quality evaluation method, and the evaluation method adopted is the gray scale variance algorithm.

[0133] The formula of the gray variance algorithm is:

[0134]

[0135]

[0136] in, is the mean value of the gray value of the image, s is the variance of the gray value of the image, and f(x, y) represents the gray value at point (x, y) of the image.

Embodiment 3

[0138] to combine Figure 12 , 13 and Figure 20-25 , a method for evaluating the clarity of digital printing of silk fabrics involved in this embodiment will be described in detail. The difference between this embodiment and Embodiment 1 is that, for the printed yang lines, yin lines, circles, and gradient bars, a non-reference image quality evaluation method is used for objective evaluation, and the evaluation method adopted is the area energy algorithm.

[0139] The area energy algorithm is to calculate the sum of the absolute values ​​of the gray value differences of four adjacent diagonal pixels, and its formula is:

[0140]

[0141] In the formula, M and N are the width and height of the image respectively; f(x, y) represents the gray value of point (x, y) in the image; s is the calculation result of the area energy algorithm.

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Abstract

The invention discloses a method for evaluating the digital printing definition of a silk fabric, which comprises the following steps of: (1) preparing printing ink, and printing a sunny line, a shadyline, a circle, a transition strip and a transition strip printed by a complex image along the vertical direction on the silk fabric; (2) performing objective evaluation on the printed image by adopting a no-reference image quality evaluation method; and (3) evaluating the printed complex image by adopting an MOS subjective evaluation method. According to the method for evaluating the digital printing definition of the silk fabric, edge seepage definition evaluation is conducted on the sunny line and the shady line through the seepage degree, internal seepage definition evaluation is conducted on the sunny line, the shady line, the circle and the gradual change strip through the gray entropy algorithm, and finally subjective evaluation is conducted on a complex image through a single stimulation method. According to the method, a method of combining objective evaluation and subjective evaluation is adopted, and compared with a single evaluation method of objective evaluation and subjective evaluation, the definition degree of digital printing of the silk fabric is accurately evaluated.

Description

technical field [0001] The invention relates to the technical field of fabric digital printing evaluation, in particular to an evaluation method for digital printing clarity of silk fabrics. Background technique [0002] Digital printing technology is the product of the combination of digital technology and traditional printing and dyeing technology, and it is a revolutionary breakthrough in the traditional printing and dyeing industry. In the era of digitalization and networking, digital printing represents the technological development direction of the printing and dyeing industry in the future. my country's textile digital printing has experienced about ten years from the recognition of its application, and people in the industry have reached a consensus on its superiority, and called it "a revolution in textile printing technology" or "universal printing technology". . Therefore, the industry has placed high expectations on this technology. Compared with traditional pr...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T7/0004G06T2207/30168
Inventor 马辉高普申晓星曹建达
Owner JIAXING UNIV