Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Digital halftoning with spiral dots

A halftone, halftone technology, applied in the preparation of printing surface, permanent visual display devices, instruments, etc., to achieve the effect of less ink consumption, good printing quality, and ink saving

Pending Publication Date: 2021-11-26
易客发有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the transition from one threshold tile to another can produce density jumps in the printed image, whereby the calibration of said screen technology also takes more service time than AM and FM

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
  • Digital halftoning with spiral dots
  • Digital halftoning with spiral dots
  • Digital halftoning with spiral dots

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0095]

example 2

[0097] .

[0098] The first helix may also be an elliptical helix. In such an embodiment, the major axis of the ellipse is preferably along the screen angle of the raster image ( ) or perpendicular to the screen angle ( ) orientation.

[0099]As already indicated in the Summary of the Invention, the ink channels defined by the second arc or spiral allow controlled spreading of ink printed in the area defined by the first arc or spiral, enabling Higher image quality with less ink than in . In addition, the controlled spreading of the ink also allows for reduced printing mottling. In the prior art, printing mottling is reduced by modification of the substrate surface, for example by applying an ink-absorbing coating prior to printing or by corona or flame treatment. The present invention allows avoiding such modifications to some substrates. In addition, it provides better water absorbency of the paper, making water interference spots less. It can even reduce show-thr...

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

A halftone raster image, suitable for rendering a continuous-tone image, which comprises a plurality of regularly tiled spiral dots. Said spiral dots comprise (i) image pixels arranged as a first arc (200) or as a plurality of arcs which together represent a first spiral (100), and (ii) non-image pixels arranged as a second arc (201) or as a plurality of arcs which together represent a second spiral (101). wherein neighbour halftone dots from said plurality of regularly tiled halftone dots represent a double spiral or triple spiral.

Description

technical field [0001] The invention relates to the field of digital halftoning methods for printing images, in particular by means of lithographic or flexographic printing machines, and by digital printing techniques such as inkjet printing. Background technique [0002] Printing presses and digital presses cannot vary the amount of ink or toner applied to specific image areas except through digital halftoning, also known as dithering or screening. Digital halftoning is the process of rendering the illusion of a continuous-tone image with multiple dots (also known as halftone dots). Digital images produced by digital halftoning are called halftone raster images or screens. Both multilevel and binary halftoning methods are known. Halftone dots produced by the binary method are composed of pixels representing image data and pixels representing non-image data. [0003] Binary digital halftoning is a well-known technique explained in detail in his book "Digital Halftoning" (...

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 Applications(China)
IPC IPC(8): H04N1/405B41M1/04B41M1/06B41J2/205
CPCH04N1/405B41M1/04B41M1/06B41C1/10B41N1/14B41N3/003G06K15/1881H04N1/4057G06K15/1836H04N1/4056H04N1/4055
Inventor R·巴特尔斯
Owner 易客发有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com