Table-printing machine system and method with halftone monocoloure treatment

A printing machine and half-tone technology, applied in printing and other fields, can solve problems such as inability to obtain printing grayscale values, re-projection errors, ink waste, and affecting printing quality

Inactive Publication Date: 2007-02-28
SUNPLUS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional error diffusion system architecture does not take into account the characteristics of the actual output device, such as the size and shape of inkjet ink dots, which will not only cause ink waste, but also fail to obtain accurate printing grayscale values ​​and re-projection errors. affect the print quality
Therefore, the halftone monochrome processing method of known printing machine system still has many deficiencies and has the necessity of being improved.

Method used

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  • Table-printing machine system and method with halftone monocoloure treatment
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  • Table-printing machine system and method with halftone monocoloure treatment

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Embodiment Construction

[0027] FIG. 4 shows a block diagram of a printer system with halftone monochrome processing according to the present invention. The image 440 printed by the printer system is composed of a two-dimensional array of pixels 450, where pixels (i, j) 450 is the pixel in the i-th column and j-th row of the image 440. The pixels marked B1, B2, B3, and B4 are previously processed pixel values, and the relative positional relationship between them and the pixel (i, j) is shown in FIG. 4.

[0028] The printer system includes an update device 400, a threshold device 410, an error determination device 420, and a filter device 430. The first input of the update device 400 is used to receive the value P(i,j) of the pixel (i,j) to be printed transmitted by the printer system (that is, the pixel value currently processed), and the second The input terminal is used to receive a feedback error signal to correct the pixels (i, j+1), (i+1, j-1), (i+1, j), (i+1, j+1) value. In this embodiment, after t...

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Abstract

The present invention provides a table printer system with halftone monochrome processing function and its method. Said column-printed image is formed from a two-dimensional array of pixels, and these pixels are arranged according to several column directions. Said table printed system includes the following components: an adder, a crilial value device and an energy decision device. Said invention also provides the concrete action of the said every component and concrete steps of said invented method.

Description

Technical field [0001] The present invention relates to the technical field of printers, in particular to a printer system and method with halftone monochrome processing. Background technique [0002] In the implementation of printing with a printer, since the resolution of the human eye is not high, if a group of dots are densely arranged on a small area, the human eye can no longer distinguish the difference of individual dots, but can only feel The average reflectivity formed by these dots as a whole, so as long as the density of this group of dots is controlled, different gray scales can be formed during the printing process. Generally, half-tone technology is used to determine the positions of individual points in the group of dense points, so as to achieve a preset gray scale and reduce the unpleasant phenomenon in the picture. The halftone technique has two methods: dithering and error diffusion. [0003] The main meaning of the Dithering method is to represent different g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/01
Inventor 何文政
Owner SUNPLUS TECH CO LTD
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