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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 problem of unable to determine the thin waist and needle point position of the color block, unable to fill the fine seam, etc., to ensure the trapping effect and make up for design errors. Effect

Active Publication Date: 2011-10-05
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

[0055] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0056] A method for denoising color blocks before trapping, the steps of which include:

[0057] (1) Scan the color block boundary, and determine a pair of starting points within the range of the inner waist and needle tip of the color block on the same color block boundary as a pair of current points.

[0058] In step (1), the method for determining a pair of starting points within the range of the inner waist and the needle tip of the color block on the border of the same color block includes the following steps:

[0059] a. Select any end point Q of the color block boundary, and the end point refers to the end point of each line segment after segmenting the color block boundary;

[0060] b. Scan along the color block boundary path from the end point Q, find out the first scanning point P whose distance from the end point Q is less t...

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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 and printing, and particularly relates to a method for denoising color blocks before trapping. Background technique [0002] In the packaging and printing layout, multiple color blocks on the same layout are adjacent, because the color blocks are not set correctly or the color blocks are shifted after the color block is set, so that there is a certain distance between the color blocks; if the color blocks are If the distance between the color blocks is greater than the user-specified threshold, the two color blocks are not related. If the distance between the color blocks is less than the user-specified threshold, it is called the color block slit. Therefore, before the color blocks are processed for trapping, it is necessary to fill the fine seams of the color blocks to make the printing beautiful. [0003] In the prior art, regarding the inspection of image data, there are also some related p...

Claims

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Application Information

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Patent Type & Authority Patents(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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