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Method and system for constructing non-progressive screen dots

A non-progressive, halftone technology, applied in the field of constructing non-progressive dots, can solve the problems such as the technology or method of constructing non-progressive dots without progressive dots, and achieve the effects of significant ink saving, reduced usage, and simple processing methods.

Inactive Publication Date: 2013-05-29
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the dot generation technologies mentioned in the existing literature or systems, there is no technology or method for constructing non-progressive dots for progressive dots

Method used

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  • Method and system for constructing non-progressive screen dots
  • Method and system for constructing non-progressive screen dots
  • Method and system for constructing non-progressive screen dots

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Embodiment 1

[0045] In this embodiment, an example is used to generate a circular dot with a gradient ratio of 100%, and the process is as follows figure 1 Shown, a kind of method of constructing non-progressive network, comprises the following steps:

[0046] First determine the progressive network dot hanging network area (step S11), obtain the gradual change ratio along the progressive direction in the progressive network dot hanging network zone to be 100%, wherein said gradual change ratio along the progressive direction refers to minimum and maximum ink ratio along the progressive direction The ratio of the ink mentioned above is the percentage of the ink area and the blank area in the area where the dot is located. The gradient ratio varies depending on the ink and paper. In practice, the empirical value is generally set according to the printing parameters such as ink and paper. Generally, is greater than or equal to 25% and less than or equal to 1.

[0047] Step S12, judging whet...

Embodiment 2

[0072] Others are identical with embodiment one, and difference is: the threshold value of setting in step 2 is 60%; In step 3, if setting non-progressive dot generation mode is the dot optimization mode, then according to step S15, at first generate progressive dot, as Figure 4 Shown, generate new network point (step S16) according to same function cluster F among the above-mentioned embodiment one then, and in Figure 4 XOR superposition is performed on the generated progressive dots to generate new non-progressive dots (step S14).

[0073] In this embodiment, the function cluster F supports recursive calls, that is, a new dot is generated on the basis of the progressive dot, and a second dot is generated based on the new dot once again, so that the dot ink ratio generated by the function cluster F exceeds the limit value, and then stops. XOR superposition generates non-progressive dots, that is, secondary dots are XORed with primary dots, and the last dots are XORed with p...

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Abstract

The invention relates to a method and system for constructing non-progressive screen dots, belonging to the field of printing and publishing. Multiple layers of annularly embedded non-progressive screen dots are generated through a defined function cluster F, a direct network-hanging method or screen dot optimizing method by using collimation errors that deep color is easy to invade light color on the vision of the human body on the basis of network hanging of the non-progressive screen dots. By adopting the method and the system disclosed by the invention, the printing effect is bright, the progressive effect is smooth and thin, and the new screen dot greatly reduces the continuous area of ink, therefore, the ink consumption is greatly lowered, the printing cost is saved and the environment is protected.

Description

technical field [0001] The invention belongs to the field of publishing and printing, and in particular relates to a method and system for constructing non-progressive dots. Background technique [0002] In color printing, CMYK4 color overprinting is often used, relying on the overprinting of cyan, magenta, yellow, and black pigments to produce color images. These 4 basic colors are combined to present up to 8 colors: red, green, blue, cyan, magenta, yellow, black, and white, and a color image contains far more than 8 colors. By color-separating and correcting the color image into a 4-color grayscale image, the image after color separation is 4 grayscale images with continuous tones. In 4-color printing, only one ink can be used for each printing, and the ink concentration remains unchanged. In order to obtain continuous tone when printing, the grayscale image needs to be screened. Screening, also called screening, is the process of decomposing continuous tone images into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/52G03F5/00
Inventor 李平立贾文华邱翔宇袁梦尤龚健
Owner PEKING UNIV
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