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Overprinting accuracy detection method and device

A detection method and precision technology, applied in measuring devices, optical devices, instruments, etc., can solve problems such as large errors in overprint accuracy detection

Active Publication Date: 2018-05-08
NEW FOUNDER HLDG DEV LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for overprinting accuracy detection to overcome the technical problem of relatively large overprinting accuracy detection error in the prior art

Method used

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  • Overprinting accuracy detection method and device
  • Overprinting accuracy detection method and device
  • Overprinting accuracy detection method and device

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Embodiment Construction

[0035] figure 1 It is a flow chart of Embodiment 1 of the overprint accuracy detection method of the present invention. Such as figure 1 As shown, the method of this embodiment may include:

[0036] Step 101, collect a target detection image, the target detection image includes at least two overprint marks, and each overprint mark is printed by a nozzle of a different ink color.

[0037] Specifically, in the overprinting process, for example, C (cyan), M (magenta), Y (yellow), K (black) four-color overprinting process, when the substrate passes through the four-color nozzles in sequence, the four-color nozzles will Prints an overprint mark at the same location on the substrate, usually at the edge of the substrate. The target detection image collected in this embodiment is the image containing the four-color overprint marks. The target detection image can be collected by an industrial camera, etc., and the collected target detection image can be input to a computer for anal...

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Abstract

The invention provides a method and device for detecting overprint accuracy. The overprint accuracy detection method of the present invention includes: collecting a target detection image, the target detection image includes at least two overprint marks, each overprint mark is formed by spraying nozzles of different ink colors; determining the overprint of each overprint mark relative to the reference The offset of the mark; the overprint accuracy is determined according to the offset. In the present invention, the overprint accuracy is determined by the offset of the overprint mark, which solves the technical problem in the prior art that the error of the detection method is relatively large.

Description

technical field [0001] The invention relates to digital printing technology, in particular to a method and device for detecting overprint accuracy. Background technique [0002] Overprinting refers to the overlapping registration of graphic and text printing of each color plate during multi-color printing, that is, the monochrome printing plates with different screen line angles obtained after color separation of the original, are overlapped and aligned in sequence according to the color sequence of the printing plate, and the final printing is obtained. Prints with the same level and tone as the original. [0003] The accuracy of overprinting is a key factor affecting the printing quality of printed matter. In the prior art, manual inspection is usually used to check the overprint accuracy of the printed matter, that is, the overprint accuracy is judged by naked eyes. [0004] However, there are relatively large errors in the overprint accuracy of printed matter through m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/02
Inventor 曾伟
Owner NEW FOUNDER HLDG DEV LLC
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