Unlock instant, AI-driven research and patent intelligence for your innovation.

Error-diffusion half-tone image treatment system and method

A technology of error diffusion and image processing, applied in image communication, electrical components, etc.

Inactive Publication Date: 2008-04-30
SUNPLUS TECH CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an error diffusion halftone image processing system and method, so as to avoid the problem of fixed frequency lines produced by the known technology, and to reduce the unpleasant phenomenon in the picture to human eyes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Error-diffusion half-tone image treatment system and method
  • Error-diffusion half-tone image treatment system and method
  • Error-diffusion half-tone image treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 2 It is a block diagram of the error diffusion halftone image processing system of the present invention. The halftone image processing system processes a continuous tone image and generates a halftone image. A continuous-tone image consists of a two-dimensional array of pixels (i, j), where (i, j) is the pixel at column i and row j of the image, and the color of pixel (i, j) can be cyan or magenta and yellow, and their values ​​are represented by C(i, j), M(i, j) and Y(i, j) respectively. The system includes an adder 210 , a threshold generator 220 , a comparison device 230 , a subtractor 240 and an error diffusion device 250 .

[0026] The first input terminal of the adder 210 is used to receive the kth color of a pixel (i, j). In this embodiment, cyan color C(i, j) is taken as an example, and the same principle can also be applied to magenta and yellow . The second input terminal is used to receive a feedback cyan error diffusion signal to generate a modif...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Based on image in continuous tone, the invention generates image in halftone. image in continuous tone is composed of pixel (i, j) in 2D, where (i, j) pixel in i row and j column. The method includes following steps: (1) based on Kth color value of pixel (i, j) to select threshold level for Kth color; (2) comparing Kth color value of pixel (i, j) with threshold level of Kth color value; (3) outputting a two norm levels relevant Kth color value of pixel (i, j); and two norm levels based on comparison result in step (2); (4) deciding errors of Kth color value of pixel (i, j) and two norm levels; (5) diffusing errors to Kth colors of pixels adjacent to pixel (i, j).

Description

technical field [0001] The invention relates to the technical field of halftone image processing, in particular to an error diffusion halftone image processing system and method. Background technique [0002] In the operation of printing with a printer, due to the low resolution of the human eye, if a group of dots are densely arranged on a small area, the human eye can no longer distinguish the difference between individual dots, but can only feel the overall quality of these dots. The average reflectance formed, so as long as the density of these points is controlled, different gray scales can be formed during the printing process. Generally, a half-tone technique is used to determine the positions of individual points in the clustered dots, so as to achieve a preset gray scale and reduce the unpleasant phenomenon in the picture. [0003] The halftone technique is often applied to binary image output devices, such as inkjet printers and laser printers. These binary image...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/405H04N1/40
Inventor 林志杰
Owner SUNPLUS TECH CO LTD