Platesetter Electronic Photographing Professional Vocabulary Image Processor - IMAGESETTER VS PLATESETTE


Imagesetter and platesefter are the two protagonists in the DTP work environment. They are often mistakenly referred to as imagesetters and are obviously not suitable. Because the full name of the imagesetter is a phototypewriter. Its English phototypesetting machine, phototypesetter, photosetter, filmsetter and so on. If a Chinese person mentions an imagesetter, the translator cannot associate the imagesetter and it is easy to translate photosetters into the past. This can lead to misunderstandings. Let's say that there is a clear concept in the photo-composing machine, that is, relying on the word template to make the text be captured on film or printing paper, and then take the print. Therefore, translating imagesetter into an image photosetter is obviously reducing its efficiency to the level of the imagesetter.

The origins of imagesetters come from the typesetters used in the special arrangement of the images in the electronic imagesetter. Symmetrically derived from these are texts, graphics, images, etc., which are output together after being screened together. They have become a new type of output device and form a unique Supply and demand market. Some people call it an image output machine, it is not appropriate, because the word output machine is a generic concept, the output itself does not declare the process, only the results of the job, say a lot of similar devices can be called output machine, Such as printer, copier, etc., and setter and output does not correspond to the meaning, poor reproducibility.

In terms of structure and mechanism, imagesetter and typesetter are completely different. Not only can they deal with text, but also can process images, photos, etc. Not only the exposure and delivery mechanisms have been greatly improved, but the dot generation techniques have also been correspondingly improved.

Specifically speaking, the typesetter should be translated into a text typesetting machine, which uses a plane transmission method to expose the photosensitive material. In the process of performing exposure while moving the photosensitive material on one side, there is a disadvantage of poor registration accuracy and can only be used in black and white. Word processing.

However, imagesetter has been developed to output four-color separation films. The solution is to expose the inner drum while it is in a stopped state, so no misalignment can occur. Afterwards, an external cylinder-type imagesetter is introduced. The photosensitive material is wound on the outside of the drum to receive exposure, and can output high-precision four-color separation film. Both accuracy and stability have improved. It is not just a great change in the internal structure. It can also be seen from its new features and appearance that it is very different from the image-setter.

According to the above situation, the understanding of the imagesetter should be the equipment for the high-precision film imaging using the document data obtained in the page description language. Taking into account its technical connotation and taking into account the correspondence between Chinese and foreign languages, it is considered that translating imagesetter into an “image integrator” is appropriate. Because the term "integration" has been widely adopted in electronic physics, it has the meaning of bringing together text, graphics, images, and photos. It is possible to integrate the content of setters, that is, images with different tones, to express a full image on high-precision film, and to express it from Chinese to English.

In the other protagonist of DTP's work environment, platesetter is not synonymous with plate and photosetter. Translating it into a printing plate photosetter is obviously inconsistent with the facts. Imagine having a printing plate, but also according to what the arrangement machine does, the phototypesetting machine is used for producing the bottom plate. In principle, it is not directly related to the printing plate. From the Chinese standard, it is also inappropriate to use the printing plate to modify the imagesetter. Besides, the platesetter is completely different from the picture machine in terms of your appearance or appearance, and it has nothing to do with the role or place of placement in the DTP work environment. In fact, platesetter is a relative. In terms of mechanism, it is divided into inner scan mode, outer scan mode, plane scan mode, and inkjet mode. The used film was replaced on the platesetter by the plate for the printing plate. The plate was based on paper or polyester, ie directly on the paper substrate or on the substrate Form a layout including text, graphics, and images, with a print resistance of 1-2 million impressions.

The process of imaging on the plate is based on the infrared photothermal or ultraviolet photothermographic direct imaging relationship, and it should be translated into a relatively clear imaging machine. The finished product it obtained is a pattern. In this way, the concept of the backwards photo machine is eliminated.

Europe and the United States have already promoted the integration of DTP and CEPS technologies, and Japan has followed suit. The CEPS mentioned here refers to the Color Elecironic prepress system.

Let us briefly introduce the technical integration of the two.

CEPS is an electronic platemaking system with a high degree of image processing capabilities. The use of CEPS in the DTP operating environment can significantly improve image quality. After combining the two, in order to effectively carry out the work. First, in CEPS, a plate scanner was used to decompose high-quality images and undergo revision. Then hand over the low-resolution data to the user. Please arrange for the layout. The version of the designed data is sent to the CEPS to convert the low resolution image to a high resolution image.

Because black people are dealing with CEPS, when editing data is used, it is necessary to re-edit it on CEPS.

In order to perform the fusion operation in accordance with the above, it is necessary to make some adjustments to the size of the photo at the time of color separation. At this time, it should be noted that the original image must not be replaced once the image is corrected by application software other than the layout design software. That is, using low-resolution data for the layout, you can also zoom in, zoom out, and shift on the layout design software.

However, the change of the image magnification causes deterioration of the image. Therefore, it is desirable to solve the problem within the range of 80-120%. If you need to zoom out beyond this range, you need to redo the color separation.

In addition, when the image is converted, if the original name of the file name and the file name are not the same, it cannot be converted. Therefore, the name of the file cannot be arbitrarily changed.

At the time of receiving the manuscript, the low-resolution image files used must be saved in the same folder as the compiled files. The following is not to use the graphic to illustrate the technical environment of DTP and CEPS fusion, and to clarify the angle and position of the imagesetter and platesetter in this environment, so that we can conclude that they should be appropriately named.

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