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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: 2013-03-27
PEKING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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] Trapped object conversion module 51: used to convert the trapped object into simple color blocks, and obtain the common boundary of adjacent color blocks by scanning all color blocks;

[0039] Boundary trapping processing judging module 52: used to judge whether each public boundary meets the conditions for trapping processing, and if it is satisfied, determine the trapping direction;

[0040] Trap direction update module 53: used to find adjacent color blocks containing inks of the same color, and update the trap direction of the common boundary;

[0041] The trapping processing module 54 is used to perform trapping processing according to the updated trapping direction.

[0042] In this embodiment, the workflow of the trapping direction update module ...

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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 trapping direction 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] Trap, also known as trapping in the printing industry, is also called expansion and contraction, mainly to compensate for the leakage between two adjacent different colors caused by inaccurate printing. When people face the printed matter, they always feel that the dark color is close to the human eye, and the light color is far away. Therefore, when trapping the original manuscript, always try to prevent the light color under the dark color from revealing. The dark color above remains unchanged. In this way, even if a small offset occurs, the overprinted ink can conceal the error of inaccurate overprinting without causing the shape of the object to be distorted, thus ensuring that the visual effect is not affected. [0003] The overprinting object does not need to be trapped because there is no inaccurate overprin...

Claims

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Application Information

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Patent Type & Authority Patents(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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