Analysis of the hottest art screening technology 0

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Analysis of art plus technology

plus technology is the basic way to reproduce continuous tone images, and it is also an important technology to determine the quality of printed matter. It has a history of more than 100 years in the printing field. It has experienced the development stages of glass screen, contact screen, electronic plus, digital plus, and has formed rational plus, irrational plus, super cell structure plus, frequency modulation plus and other technologies. At present, amplitude modulation plus and frequency modulation plus as two major mainstream plus technology has been playing a leading role. With the progress of science and technology, some special plus technology continues to appear, which has been used in some printing fields, reproducing prints with different uses

hybrid addition technology

as we all know, amplitude modulation addition reproduces the image order and level by changing the point size through fixed point spacing, which has obvious advantages for the restoration of image halftone. FM plus reproduces the image order and level by changing the point spacing through fixing the point size, which can restore the details of the image well. Hybrid plus technology is a new plus technology developed by combining the advantages of AM plus and FM plus

hybrid addition is developed on the basis of digital addition principle and computer control technology. Its principle is that there are two methods to measure the coaxiality of material experimental machines in Jinan experimental machine factory: 1 When measuring the geometric coaxiality, clamp the round specimen with a gauge distance of more than 500mm on the collet, apply 1% of the maximum experimental force of the testing machine, and then measure the upper and lower points in the front and rear, left and right directions with a special tester and dial indicator respectively. The reading difference of the dial indicator measured in the two directions is different, and its maximum value is used as the high-key and dark key part of the geometric coaxiality image between the collet's centerline and the force application axis of the testing machine to generate frequency modulation points, The intermediate modulation part simulates the configuration of amplitude modulation points, that is, while maintaining a certain number of points, it realizes the step reproduction by changing the size of a single point. Hybrid plus technology makes full use of the advantages of FM plus, while maintaining the good printability of AM points. Therefore, using hybrid plus technology can achieve good image reproduction effect

this kind of point and this idea has been used by many cushion material manufacturers before and after. With amplitude modulation points as the skeleton and frequency modulation points as the decoration, the shapes of the points are different, and the positions are slightly randomly distributed, which has the characteristics of both amplitude modulation and frequency modulation points. The advantage of hybrid addition is that there is no point angle and direction problem, the low-frequency components are reduced to reduce the graininess of the picture, and the high-frequency components are reduced to improve the printing stability. Therefore, the printability of mixing point is better than that of AM point and FM point

art plus technology

the basic principle of art plus technology is to replace conventional points with graphics or patterns of various shapes to achieve the purpose of reproducing image levels. The commonly used point shapes in general addition technology are generally circular, oval, diamond or square, and the formation of point shapes is controlled by point functions. According to postscript plus principle, the mathematical model of point function can be adjusted to flexibly control the shape of points, which is the mathematical theoretical basis of art plus technology

art addition is to describe the outline of the figure or pattern as a point according to a certain algorithm, and then use the expansion, reduction or other nonlinear transformation algorithms for the outline to make the contour curve correspond to the gray value of the image one by one, and finally use the figure or pattern described by the outline to complete the addition of the image; Figure 2 shows the image generated by some art plus technology. It can be seen from the figure that in the high-profile part of the image, the edge of the point contour is in the shape of a fish; The dark part adopts the reverse point, and the outline of the blank part is goose shaped; While the middle part uses fish shape and wild goose shape to represent the inked part and blank part respectively. Changing the mathematical model of the shape of the control point can change the fish shape and wild goose shape into other shapes, such as line patterns with poor anti-interference ability, so as to enrich the types of artistic additions

art plus technology is most suitable for large outdoor posters and advertising paintings. People can see the overall image effect of the picture from a distance, and can learn the special information contained in the point from a nearby place. In addition, anti-counterfeiting printing is also suitable for art plus, which prints micro text or icons (trademarks) in the image as point shapes, because the point contour algorithm is unique, Therefore, "new chemical materials 1 has always been the largest short board in our industry, which can play a certain anti-counterfeiting role. Figure 3 shows that the anti-counterfeiting image printed after dots is replaced by micro text. With the help of a magnifying glass, you can clearly see the small text hidden in the image, thus playing the role of identifying the true and false

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