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Method and system for eliminating printing image sawteeth

A technology for printing images and sawtooth, applied in printing devices, printing, etc., can solve problems that cannot be completely solved, and achieve good quality results

Active Publication Date: 2022-07-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] from Figure 1 to Figure 2 The simple optimization method, although there has been a big improvement, but considering that 18 microns and 14 microns are still a relatively large value relative to the ink droplet diameter of 21 microns, so figure 2 The simple optimization method shown does not completely solve the problem

Method used

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  • Method and system for eliminating printing image sawteeth
  • Method and system for eliminating printing image sawteeth
  • Method and system for eliminating printing image sawteeth

Examples

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Embodiment 1

[0061] A preferred embodiment of the present invention discloses a method for eliminating the jaggedness of a printed image, comprising the following steps:

[0062] S1. Calculate the size of each pixel according to the resolution of the print head, and calculate the height difference between adjacent ink droplets in each group of ink droplets printed on the paper; wherein, the print head includes several printing units, each printing The nozzles in the unit are distributed in m columns, each column has n nozzles, and the m columns of ink droplets printed on the paper are divided into n groups, and the m columns of ink droplets in the same group are printed sequentially in sequence; m≥ 2; n≥1.

[0063] Specifically, the size of each pixel calculated according to the resolution of the print head is:

[0064]

[0065]

[0066] Among them, a*b is the resolution of the print head, that is, there are a ink dots per inch in the horizontal direction and b ink dots per inch in ...

Embodiment 2

[0121] This embodiment discloses an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the steps of the method described in the foregoing embodiments when the processor executes the program .

Embodiment 3

[0123] This embodiment discloses a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of the method described in the foregoing embodiment.

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Abstract

The invention discloses a method and system for eliminating printing image sawteeth, and the method comprises the steps: S1, calculating the size of each pixel according to the resolution of a printing head, and calculating the height difference between adjacent ink droplets in each group of ink droplets printed on paper; s2, calculating a coordinate compensation value corresponding to each ink dot according to the size of each pixel and the height difference between adjacent ink droplets in each group of ink droplets printed on the paper; and S3, during rasterization, subtracting the corresponding coordinate compensation value from the sampling coordinate, and rounding to obtain an ink dot coordinate. According to the method and system for eliminating the printing image sawteeth, the offset characteristic of ink droplets in the printing process is fully considered, the coordinate compensation value of each ink dot is calculated firstly, the corresponding coordinate compensation value is subtracted from sampling coordinates during rasterization, and the coordinates of the ink dots are obtained through rounding. According to the invention, the plurality of pixel points in each group are arranged in a downward inclined manner after rasterization, and the physical position of the ink droplet is fully considered, so that the printed image can obtain better quality.

Description

technical field [0001] The present invention relates to the technical field of digital inkjet printing, and in particular, to a method and system for eliminating the jaggedness of a printed image. Background technique [0002] There are two mainstream technologies for print heads used in digital inkjet printing, namely thermal foaming and piezoelectric technology. The thermal foaming technology is to heat the nozzle to make the ink generate bubbles and spray it onto the printing medium, which belongs to the high temperature and high pressure printing technology. Its working principle is: using thin film resistors, the ink less than 5 picoliters is instantly heated to more than 300 ℃ in the ink ejection area, forming countless tiny bubbles, and the bubbles gather into large bubbles at an extremely fast speed of less than 10 microseconds. expansion, forcing the droplet to eject from the nozzle. Piezoelectric inkjet printing technology belongs to normal temperature and normal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/07B41J2/075B41J2/11B41J29/393
CPCB41J2/07B41J2/075B41J2/11B41J29/393
Inventor 姜博文周文赵海旭刘文韬缪永杰樊荣顾文超程龙廉凯成杨晨柴志雷
Owner JIANGNAN UNIV