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Denoising method of color block before trapping

A color block, a pair of technology, applied in the field of color block noise removal before trapping, can solve the problems of not being able to determine the slender waist of the color block and the position of the needle point, and unable to fill the thin seam, so as to ensure the trapping effect and make up for design errors. Effect

Active Publication Date: 2010-07-07
PEKING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Denoising method of color block before trapping
  • Denoising method of color block before trapping
  • Denoising method of color block before trapping

Examples

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Embodiment Construction

[0059] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] A method for denoising color blocks before trapping, the steps comprising:

[0061] (1) Scan the boundary of the color block, and determine a pair of starting points within the range of the thin waist and needle point inside the color block on the same color block boundary as a pair of current points.

[0062] In step (1), the method for determining a pair of starting points within the thin waist and needle tip range of the same color block on the boundary of the same color block includes the following steps:

[0063] A. select any endpoint Q of the color block boundary, and the endpoint refers to the endpoint of each line segment after the color block boundary is segmented;

[0064] b. Scan from the endpoint Q along the color block boundary path to find the first scanning point P whose distance from the endpoint Q is less tha...

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PUM

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Abstract

The invention relates to a denoising method of a color block before trapping, which belongs to technical field of packaging printing. Before the trapping in the invention, one denoising method of the color block before trapping is to scan the color block border, to remove slender waist and needle tip inside the color block. The other denoising method of the color block before trapping is to scan the color block border, to determine the color block slit region, and then, to fill the color block slit according to the trapping direction between color blocks at both sides of the color block slit and the intersection situation between the color block natural extension line and the adjacent color block. The adoption of the method provided by the invention not only can remove the slender waist and the needle tip inside the color block before trapping, but also can fill the slit between the adjacent color blocks and make up for design mistakes and ensure correct trapping effect.

Description

technical field [0001] The invention belongs to the technical field of packaging printing, in particular to a method for removing noise of color blocks 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. [0003] In the prior art, regarding the inspection of image data, there are also some related patents abroad, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/58G06F3/12G06K15/02
Inventor 李平立贾文华袁晗光姜建军
Owner PEKING UNIV
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