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A method for detecting and characterizing the quality of star-marked printed matter

A technology of star marks and printed products, which is applied in the field of detection and characterization of the quality of star-marked printed products, and can solve problems such as unfavorable quantitative research and data management, lack of quantitative data, and insufficient accuracy

Active Publication Date: 2021-10-26
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although simple and convenient, but without quantitative data, it can only be explained qualitatively, which is not accurate enough, and is not conducive to quantitative research and data management

Method used

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  • A method for detecting and characterizing the quality of star-marked printed matter
  • A method for detecting and characterizing the quality of star-marked printed matter
  • A method for detecting and characterizing the quality of star-marked printed matter

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Embodiment Construction

[0065] The method for detecting and characterizing the quality of star-marked printed matter of the present invention comprises the following steps:

[0066] 1. This embodiment is a quality inspection and characterization process of a digital printing machine printing / printing star marks on three kinds of paper and an inkjet printer on one kind of paper (see 1# to 4# samples in Table 1 for details) .

[0067] like figure 1 As shown, it is the digital manuscript of the star mark pattern used in this embodiment, which is the digital manuscript figure of the star mark vector pattern in pdf format. Among them, the star pattern is composed of 36 pairs of bright radiating lines and dark radiating lines with equal angular width, and each bright line and dark line has a fixed angular width of 5°; the horizontal axis direction is 0° and 180° in the radial direction. One dark line center line, two dark line center lines at 90° in the vertical axis direction and two dark line center li...

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Abstract

The invention relates to a method for detecting and characterizing the quality of star-marked printed products, which belongs to the technical field of printing / printout; it includes the following steps: (1) 36 pairs of equiangular wide bright lines and dark lines radiating from one point to the surroundings The star pattern and its surrounding symmetrical straight line segments are used as the digital manuscript; (2) output the digital manuscript to obtain the detection pattern of the star print; (3) calibrate the light reflectance of the imaging system; (4) obtain the star print The RGB digital image of the detection pattern; (5) obtaining the grayscale image of the light reflectance; (6) extracting and quantifying the quality attribute characteristics of the star mark on the grayscale image of the light reflectance obtained in step (5). The detection and characterization method for the quality of star-marked printed products established by the present invention can quantify and characterize the dark line angle width, the size and shape of the central fuzzy area, and the filling rate of the central area of ​​the star-marked printed products, making it commonly used in visual inspection of printing quality. The star pattern for reviews has quantified quality descriptions.

Description

technical field [0001] The invention relates to a method for detecting and characterizing the quality of star-marked printed products, and belongs to the technical field of printing / printing. Background technique [0002] In the traditional printing technology represented by offset printing, the ink is carried by dots of different sizes and transferred to the substrate to form a pattern. In the printing technology represented by electrostatic and inkjet imaging technology, the toner or ink is carried by recording dots of different sizes. Transfer or spray onto the substrate to form a pattern, the commonality is that the color material is positioned on the substrate according to the dot or recording point information, so it can also be collectively referred to as printing. In fact, digital printing is mainly electrostatic and inkjet imaging technology. [0003] The process of positioning the colorant on the substrate according to the dot information can be described as the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84G01N21/88G06T7/00G06T7/62G06T7/90
CPCG01N21/84G01N21/8851G01N2021/8887G06T7/0002G06T2207/10008G06T2207/30204G06T7/62G06T7/90
Inventor 徐艳芳金杨张碧芊廉玉生
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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