Parallax Stereoscopic Printing is Applied in Commercial Advertisements (I)

Three-dimensional printing (3D printing for short) covers a lenticular grating plate on an image and uses a left and right eye parallax to obtain a three-dimensional image printing method. The parallax stereo method is also called a grating plate method. Three-dimensional printing pictures are beautifully produced, can be advertised and have high appreciation value. Its magical changes and unique effects tightly captured people's attention. Three-dimensional printing has been popular in Europe and America for many years. However, its high production cost (strict requirements for each aspect of platemaking and printing process technology) requires a large amount of printing to reduce the unit cost, so that the development cannot be popularized for many years. In China, since the successful development in 1967, the three-dimensional printing technology began to be applied in the 1970s, but it has been developing slowly. It has gradually developed in recent years, showing a thriving scene. In particular, this year, domestic manufacturers claim that they can reduce the cost of lenticular gratings to within one hundred yuan per square meter, which will spur the billboard industry and the market for three-dimensional advertising production.

The principle of three-dimensional printing applications

When people observe objects, they can naturally produce a three-dimensional feeling because the distance between the two eyes of a person is a certain pupil. When observing an object, the left and right eyes observe from different angles and form a visual difference between the two eyes. Various images are reflected in the brain and produce a visually poor three-dimensional effect. Observing a three-dimensional stereoscopic image on a two-dimensional planar image utilizes the above principles, such as stereoscopic mirror method, complementary color method, polarized light mirror method, and parallax stereo method (raster plate method).

Stereoscopic method:

From the two ends of the photographing base film, two 65-mm images (films) that meet the pupil distance are photographed. The two photographs are placed under the same two sets of the same simple optical system. After the photographs are oriented, the two eyes pass through the respective optics. Observe the system (ie, the stereoscope) to obtain the stereoscopic effect of the captured object.

Complementary color method:

The two sets of transmission images (positive films) are overprinted on the same sheet with two complementary colors (such as magenta and green, yellow and blue, and cyan and red). When reading, using the same complementary eyeglasses as the image, each eye sees a transmission image of one color through different lenses. Due to the stereoscopic effect of both eyes, a three-dimensional image can be produced, but only a monochrome image can be formed.

Polarizing light method:

Polarizing light mirror is used to project the two images with the polarized light lens perpendicular to each other. When observing, the viewer wears a polarizer to see the left image with the left eye and the right image with the right eye, and the stereoscopic image is obtained with both eyes.

Raster plate method:

Stereo printing is a printing method that uses a lenticular grating plate to make the image shadows have a three-dimensional sense. It is called parallax stereo, also called three-dimensional printing. The printed stereoscopic images can be viewed without the use of any tools. The traditional three-dimensional printing technology, the "traditional" here is mainly different from today's new printing technology, in the past, its production process is quite complex, three-dimensional camera photographed three-dimensional film, after plate making and printing on paper, after printing on the Glue is aligned with the lens (the alignment is quite accurate, once it is offset, it becomes a waste product, and the reject rate is as high as 15-20%, which is very unfavorable for commercial operations). The most important thing is that if the pattern is first printed on the paper and then affixed to the grating plate, the quality of the picture will often be inferior to the directly printed on the back of the lenticular lens, and the traditional three-dimensional printing is mainly printed by offset printing. If a certain quantity is required and only a few prints are required, it will also have to pay a high cost, which will seriously affect the promotion and application of the technology. Now digital applications have been resolved.

Three-dimensional printing steps

Three-dimensional printing is a systematic project, the main process flow are: modeling design and scenery selection + shooting three-dimensional photos + color screen plus plate + printing + grating plate adhesive forming + inspection + finished product packaging. Let me briefly introduce a set of methods and steps for producing three-dimensional printing:

Step one: Photographing of stereo photos

Stereo printing must first take a three-dimensional photo as a manuscript.

The stereoscopic photography is different from the general photography method in that it requires an accurate calculation of the layout, distance, angle, center point, and spacing of the grating plate before the shooting.

The method of stereo photography is divided into direct method and indirect method. The direct method is a method of photographing directly through a lenticular grating plate. The camera is moved within a certain viewing angle, and the object is photographed continuously, and the effect is better. , is the method most commonly used by people. The indirect rule is to take two or more photos in a well-defined location and then combine them correctly in a space. Compared with the direct method, the three-dimensional effect is good, but the production is troublesome. Shooting still life.

Step 2: Color separation, screening and plate making


The emergence of CTP plate making technology brings light

Computer-to-plate (CTP) technology is a type of computer-to-plate technology. It is a technique in which graphic and text information is directly recorded to a plate by computer, and it is an extension and development of laser image-sequencing technology.

CTP technology appeared in the 1980s. This period is the initial stage of the study of direct plate-making technology. Therefore, during this period, neither the technology nor the quality of the platemaking industry was very mature. In the 1990s, equipment manufacturers and printing manufacturers worked closely to accelerate the pace of research and development of this technology, and during this period reached a level of maturity and industrialization. Thus, at the drupa printing exhibition in 1995, 42 kinds of CTP systems were exhibited. This move immediately caused the printing industry to pay great attention to this technology. In 1995-1997, many large-scale printing companies adopted the CTP system and realized the direct plate-making process. However, due to the fact that the platesetter was still very expensive during this period, it limited the use and promotion of this technology in small and medium-sized enterprises. In the 21st century, the price of the plate-making machine has dropped drastically, and the plate-making version of the plate has begun to mature and develop. Therefore, a large number of small- and medium-sized printing plants have begun to accept and use the CTP technology. For the printing factory. The developed machine format includes open, 8 open, 16 open.

Currently used thermal CTP plates are considered to be the most promising technologies due to their unique features such as high resolution, high printing power, and bright room operation. According to statistics, the thermal CTP plate has accounted for more than 40% of the total sales in recent years.

Three-dimensional computer platemaking and grating composite machines require unique expertise in every aspect of their development. Companies have the ability to design and fabricate computer-engraved plates, gratings, gratings, and mechanical mesh. The use of frequency-modulation technology is now available. Computer technology and plate-making problems have been well solved, and the application of three-dimensional products can be further promoted. Relevant information indicates that the annual output value of several stereoscopic printing companies in Guangdong has exceeded 100 million yuan. This data fully shows that this technology has the potential for market development. The author believes that it has several unique features:

The first: Three-dimensional printing can produce a strong visual impact, three-dimensional, three-dimensional animation, different images and other strange effects, completely different from the traditional plane printing. The three-dimensional printing products are "dynamic" images that are full of "vitality". These features can increase the added value of products, become an excellent means for customers to promote goods and improve the market image, and novel advertising media, which play an effective role in attracting attention.

Second, three-dimensional printing is a representative of fashion and high-tech, and there is a world of difference from traditional graphic printing. The three-dimensional raster image is quite popular in developed countries in Europe and the United States, mainly because it is like a dynamic image advertisement that can express information in a deeper level. In recent years, there are also batches of three-dimensional printing products being used in China. There are also some well-known brand companies that advertise for product promotion. The size and variety of advertisement sizes are many.

Localization of materials, reducing the cost of materials, imported grating materials need nearly 1,000 yuan per square meter, plus production costs, close to 2,000 yuan, ordinary customers can hardly afford this price. Due to the increasing maturity of technology, especially the localization of grating materials, the price has basically declined. According to the different materials, the price per square meter is in the range of tens to hundreds of yuan, and there are even more than ten yuan of direct-printing grating materials. The most concerned about the price of the business has been solved, laying the foundation for three-dimensional printing to meet the needs of the Chinese market. With the development of new technologies, production costs are reduced. Now, with the increasing development of computer technology, it has been widely used in many fields. The production of stereoscopic images also entered the digital age. Using computer software (mainly PHOT0 SHOP software for image processing) and computer-to-plate technology (CTP platemaking), and adopting high-precision printing equipment from <FM network> to ensure the quality of three-dimensional printing and effectively control the production process. Important link. It has played an important role in promoting the development of three-dimensional printing. The development of printing technology, print-free direct print output If you only need to produce a small area of ​​three-dimensional printing, you only need to use the printer to complete the output. In production software, the new production software can automatically calibrate and record functions, allowing users to easily split the images into different layers and then combine them into a three-dimensional image. After the image is completed, it can be adjusted to satisfaction on the display screen repeatedly, and the production process and production quality can be effectively controlled until the user feels satisfied and prints directly on the lenticular (back).