A brief analysis of Rolling Tipping Paper art mesh technology

A brief analysis of Rolling Tipping Paper art mesh technology

Screening technology is the basic way to reproduce continuous modulation images, but also to determine the quality of printed matter is an important technology, in the field of printing has more than 100 years of history, has experienced glass screen screen, contact screen screen, electronic screening, digital screening and other development stages, and formed rational screening, irrational screening, supracellular structure screening and frequency modulation screening technology. At present, amplitude modulation screening and frequency modulation screening as the two mainstream screening technology has been playing a leading role, with the progress of science and technology, some special screening technology continues to appear, in some printing fields have been used, copy the use of different prints.

Hybrid screening technology

As we all know, amplitude modulation screening reproduces the order and level of the image by changing the dot size with fixed dot spacing, which has obvious advantages over the image intermediate tone. Frequency modulation screening reproduces the order and level of the image by changing the dot spacing and fixing the dot size, which can restore the details of the image well. Hybrid screening technology is a new type of screening technology developed by combining the advantages of amplitude modulation screening and frequency modulation screening.

Hybrid screening is developed on the basis of digital screening principle and computer control technology. Its principle is to generate FM nodes in the high and dark parts of the image, and simulate the amplitude modulation node configuration in the middle part, that is, to maintain a certain number of nodes at the same time, by changing the size of a single node to achieve tone reproduction. Hybrid screening technology makes full use of the advantages of FM screening, while maintaining the good printability of AM dot, so the use of hybrid screening technology can achieve a good image reproduction effect.

This kind of network takes amplitude modulation network as the skeleton and frequency modulation network as the decoration. The shape of the network is different, the position is slightly random distribution, and it has the characteristics of both amplitude modulation and frequency modulation network. The advantage of hybrid screening is that there is no point Angle and direction problems, reduce the low frequency component to reduce the picture granularity, reduce the high frequency component to improve printing stability.

Therefore, the printing adaptability of mixed dot is better than that of amplitude modulation dot and frequency modulation dot.

Art networking technology

The basic principle of art screening technology is to use various shapes of graphics or patterns instead of conventional points, to achieve the purpose of reproducing image levels and levels. The shape of dot commonly used in ordinary screening technology is generally round, oval, diamond or square, and the formation of dot shape is controlled by dot function. According to the principle of Postscript screening, adjusting the mathematical model of dot function can flexibly control the shape of dot, which is the mathematical theoretical basis of art screening technology.

Art screening is to describe the contour of the graph or pattern as a dot according to a certain algorithm, and then use enlargement, reduction or other nonlinear transformation algorithms to make the contour curve correspond to the gray value of the image, and finally use the graph or pattern described by the contour to complete the image screening. In the high profile part of the image, the contour edge of the dot is fish-shaped; The dark part uses the reverse dot, and the blank part shows the en - en shape. In the middle part, the ink part and the blank part are represented by the fish shape and the goose shape respectively. Changing the mathematical model of the shape of the control dot can change the fish shape and goose shape into other shapes, such as various line patterns, to enrich the types of art mesh.

Art screen technology is most suitable for large-scale outdoor posters and advertising pictures, people from the distance to watch the overall image effect of the picture, from the near and can learn the special information contained in the network. In addition, anti-counterfeiting printing is also suitable for the use of art screening, the microform or icon (trademark) as the dot shape printed in the image, because the dot contour algorithm is unique, so it can play a certain anti-counterfeiting role. The security image printed after the dot is replaced by microform text, and the small text hidden in the image can be clearly seen with the help of a magnifying glass, so as to play a role in identifying the authenticity.