Binary variable gray scale method in high-precision laser engraving rubber platemaking

A laser engraving, high-precision technology, used in printing plate preparation, image data processing, printing, etc., can solve the problems of slow speed and low precision, and achieve the goal of improving quality and speed, accurate and rapid area, and preventing repeated marking of boundary points. Effect

Pending Publication Date: 2020-09-15
LUOYANG NORMAL UNIV
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Problems solved by technology

[0025] Through the above calculations, it can be confirmed that the commonly used bin

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  • Binary variable gray scale method in high-precision laser engraving rubber platemaking
  • Binary variable gray scale method in high-precision laser engraving rubber platemaking
  • Binary variable gray scale method in high-precision laser engraving rubber platemaking

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[0055] The present invention will be further described in detail below in conjunction with the drawings. By describing these implementation examples in sufficient detail, those skilled in the art can practice the present invention.

[0056] The present invention proposes a method of binary gray scale change in high-precision laser engraving rubber plate making. The idea of ​​the method is:

[0057] For a binary image, we traverse from left to right from top to bottom. Whenever a black dot is encountered, it is judged whether the black dot is the boundary point of the dot, that is, it is judged whether there is a white dot or no pixels on the top, bottom, left, and right of the black dot. Whenever a boundary point is traversed, the boundary point can be considered as the boundary point of a certain network point. Starting from this border point of the dot, follow the border point of the dot in a certain direction and walk step by step (traversal). If you can return to the starting...

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Abstract

The invention discloses a binary variable gray scale method in high-precision laser engraving rubber platemaking. The method comprises the following steps: step 1, marking boundary points of dots to be subjected to gray scale treatment; 2, calculating the coverage rate of the dots according to the marked boundary points; 3, according to the marked boundary points and the coverage rate of the dots,carrying out topping and sloping shoulder adding on the dots, wherein a method for marking boundary pointsincludes: selecting a boundary point as a starting point; judging whether a black spot is a boundary point of a dot every time the black spot is encountered; traversing along the boundary points of the lattice points until all boundary points are found, improving the quality and speed of binary variable gray processing, finding out the boundary of the lattice points, and calculating the area of the boundary. In this way, accurate topping and support adding can be realized, and meanwhile,it can also be guaranteed that one piece of on-site topping and inclined shoulder adding are consistent and unified.

Description

technical field [0001] The invention relates to the technical field of laser engraving rubber plate making, in particular to a binary gray scale method in high precision laser engraving rubber plate making. Background technique [0002] Flexographic printing is a method of printing using a flexographic printing plate and transferring ink through an anilox roller, which is a type of letterpress printing process. A flexographic plate is a photosensitive rubber or resin type printing plate [1] . Among flexographic printing plates, direct laser engraving of rubber plates has outstanding advantages. It has the characteristics of simple plate making process, fast speed and less pollution, and has broad development prospects. [0003] The plate making of direct laser engraving rubber sheet includes digital image typesetting and screen dot, binary gray scale, laser engraving and plate cleaning and other processes. The binary gray scale processing is a binary image composed of 0 an...

Claims

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Application Information

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IPC IPC(8): G06T3/00B41C1/05
CPCG06T3/0012B41C1/05Y02P90/30
Inventor 姬孟洛贺秋瑞金彦龄崔战友匡国防娄颖颖
Owner LUOYANG NORMAL UNIV
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