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Preprocessing method and system before trapping

A preprocessing and one-to-one technology, applied in the direction of digital output to printing unit, visual demonstration using printer, electrical components, etc., can solve the problems such as the inability to determine the thin waist of the color block and the position of the needle tip, and the inability to fill the slit, etc., to achieve the guarantee Trapping effect, the effect of making up for design errors

Active Publication Date: 2012-02-01
PEKING UNIV +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

This method cannot determine the position of the thin waist and needle point inside the color block, nor can it fill the thin gap between adjacent color blocks

Method used

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  • Preprocessing method and system before trapping
  • Preprocessing method and system before trapping
  • Preprocessing method and system before trapping

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Embodiment Construction

[0066] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0067] A preprocessing system before trapping, including the following devices:

[0068] Waist and needle point removal device, used to scan the border of the color block and remove the waist and needle point inside the color block;

[0069] A color block slit scanning device, used to scan the boundaries of adjacent color blocks, and determine the color block slit area between adjacent color blocks;

[0070] The color block slit filling device fills the color block slit according to the trapping direction between the color blocks on both sides of the color block slit and the intersection of the natural extension line of the color block and the adjacent color block.

[0071] A trapping device, which is used to judge whether the trapping conditions are satisfied, determine the trapping direction, generate the shape of the trapping area...

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PUM

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Abstract

The invention relates to a preprocessing method and system before trapping, and belongs to the technical field of packaging and printing. Before carrying out the trapping process, the present invention first scans the color block boundary to remove the thin waist and needle tip inside the color block; then scans the adjacent color block boundary to determine the color block fine seam area between the adjacent color blocks; finally, according to the color block The direction of trapping between the color blocks on both sides of the slit and the intersection of the natural extension line of the color block and the adjacent color blocks, fill in the slits of the color blocks. By using the method and system of the present invention, the inner waist and needle tip of the color block can be removed before trapping, and the thin seam between adjacent color blocks can also be filled, so as to make up for design errors and ensure the correct trapping effect.

Description

technical field [0001] The invention belongs to the technical field of packaging printing, in particular to a preprocessing method and system before trapping. Background technique [0002] In packaging and printing typesetting, multiple color blocks on the same layout are adjacent to each other. Because the color blocks are not set correctly or the color blocks are shifted after setting the color blocks, there is a certain distance between the color blocks; If the distance between the color blocks is greater than the threshold specified by the user, the two color blocks are not related. If the distance between the color blocks is smaller than the threshold specified by the user, it is called a slit of color blocks. Therefore, before the color block is trapped, it is necessary to fill in the fine seams of the color block to make the printing beautiful. In the prior art, the slits of the color blocks are filled only when the color blocks are trapped, and the method of filling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/58G06F3/12G06K15/02
Inventor 贾文华李平立姜建军张琴
Owner PEKING UNIV
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