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Trapping method and device

A technology of trapping and the other side, applied in the direction of image communication, electrical components, etc., can solve problems such as gaps in the trapping area, and achieve the effect of improving the aesthetics

Active Publication Date: 2011-06-08
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the object of the present invention is to provide a trapping method and device, which can solve the problem of trapping regions caused by adjacent color blocks containing inks of the same color when performing trapping processing. The problem of gaps, generate smooth trapping areas, improve the aesthetics of trapping areas

Method used

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  • Trapping method and device

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the drawings and embodiments of the specification.

[0037] Such as Figure 5 As shown, a trapping device includes the following modules:

[0038] Trapping object conversion module 51: used to convert the trapping object into a simple color block, and obtain the common boundary of adjacent color blocks by scanning all the color blocks;

[0039] Boundary trapping processing judging module 52: used to judge whether each common boundary satisfies the conditions for trapping processing, and if so, determine the trapping direction;

[0040] Trapping direction update module 53: used to search for adjacent color blocks containing ink of the same color, and update the trapping direction of the common boundary;

[0041] Trapping processing module 54: for performing trapping processing according to the updated trapping direction.

[0042] In this embodiment, the working process of the trapping ...

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Abstract

The invention discloses a trapping method and device, which belong to the technical field of package printing. The method comprises the following steps of: firstly, determining trapping directions of public boundaries which meet a trapping processing condition; secondly, sequentially judging each non-trapped public boundary, and determining that a public boundary e is trapped in the same trappingdirection as a boundary e1 if oil ink of a color lump P1 on one side of the public boundary e comprises oil ink of a color lump P2 on the other side of the public boundary e and oil ink of an adjacent color lump P3 on the other side of the adjacent boundary e1 on the P2 on the public boundary e is oil ink obtained by subtracting the lump P2 from the color lump P1; and lastly, performing trapping processing in the updated trapping direction. By applying the method and the device, the problem of breaches on trapping regions of adjacent color lumps comprising the same type of oil ink during trapping can be solved, and the appearances of the trapping regions are enhanced.

Description

technical field [0001] The invention relates to the technical field of packaging printing, in particular to a trapping method and device. Background technique [0002] Trapping, also known as trapping in the printing industry, is also called expansion and contraction, mainly to make up for the gap between two adjacent different colors caused by printing overprinting. When people face printed matter, they always feel that the dark color is closer to the human eye, while the light color is far away from the human eye. The dark color above remains the same. In this way, even if a small offset occurs, the overprinted ink can cover up the misregistration error without distorting the shape of the object, so as to ensure that the visual effect is not affected. [0003] Overprinting objects do not need to be trapped because there is no leakage due to misregistration. In actual prepress production, prepress personnel will set smaller text and other small objects to overprint, or s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/58
Inventor 贾文华李平立张琴姜建军
Owner PEKING UNIV
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