Imagesetter VS platesetter
Imagesetter and platesetter are two protagonists in the DTP working environment. They are often misinterpreted as phototypesetting machines, which are obviously inappropriate because the full name of the phototypesetting machine is the phototypesetting machine, whose English is phototy, pesetting machine, phototypesetter, photosetter, filmsetter, etc. If a Chinese person mentions an imagesetter, when the translator cannot think of imagesetter, it is easy to translate them into photosetter and pass it on, which will cause misunderstanding. Besides, the imagesetter has a clear concept, that is, relying on the word template to make the text be taken on the film or printing paper, and then used to print. Therefore, the translation of imagesetter into image imagesetter is obviously a mistake to reduce its high-efficiency function to the level of imagesetter. The etymology of Imageseetter is indeed from the typeetter that uses the electronic imagesetter to type text. With this symmetry, it is derived that the collection of characters, graphics, images, etc. is screened together and output, which becomes a new type of output device and forms a unique supply and demand market. Some people call it an image output machine, which is also inappropriate, because the word output machine is a general concept. The output itself does not indicate the process of the process, only the result of the operation. Besides, many similar devices can be called output machines. , Such as printer, copier, etc. Moreover, the meaning of setter and output machine does not correspond, and the reduction is poor. In terms of structure and mechanism, imagesetter is completely different from typesetter. It can process not only text, but also images, photos, etc .; not only has the exposure and transmission mechanism been greatly improved, but the dot generation technology has also been improved accordingly. Specifically, the typeetter should be translated as a text typesetting machine, which uses a plane transmission method to expose the photosensitive material. During the exposure while moving the photosensitive material, there is a disadvantage of poor registration accuracy, which can only be used for black and white text deal with. However, imagesetter has been developed to output four-color separation films. The solution is to expose when the inner side of the inner drum is at a stop state, so there will be no misregistration. Later, imagesetters in the form of external drums were introduced. The photosensitive material was wound on the outside of the drum to receive exposure. It can output high-precision four-color separation films with improved accuracy and stability. Not only is it a great change in the internal structure, but also from its new functions and appearance, it can be seen that it is very different from the imagesetter. According to the above situation, the understanding of imagesetter should be: a device for high-precision film imaging using document data obtained by page description language. Considering its technical connotation and taking into account the correspondence between Chinese and foreign languages, it is considered appropriate to translate imagesetter as "image integration machine". Because the word "integration" has been widely adopted in the field of electronic physics, it has the meaning of bringing together text, graphics, images, photos, etc. That is to say, the connotation of the setter equipment is to put together several images with different tones to fully express the intention of generating a finished image on high-precision film, and it is easy to restore from Chinese to English. Another protagonist in the working environment of DTP, platesetter is not a composite of plates and photosetter. Translating it into a plate-type imagesetter clearly does not match the facts. Imagine what you want to do with a phototyper when you have a printing plate? The phototypesetting machine is used to produce the bottom plate. In principle, it is not directly related to the printing plate. From the Chinese standard, it is not appropriate to use the printing plate to modify the phototypesetting machine. Besides, the platesetter is completely different from the imagesetter in structure or appearance, and its role and placement in the DTP working environment are also independent of the imagesetter. In fact, platesetter is a relative of imagesetter. In terms of mechanism, it is divided into internal scanning method, external scanning method, plane scanning method and inkjet method. The film used on Imagesetter has been replaced with a plate-making plate on the platesetter. The plate here uses paper-based or polyester film-based, that is, directly on the paper-based plate or polyester-based plate. Formed on the layout, including text, graphics, images, printing resistance is 10,000 to 20,000. The process of imaging on the plate material depends on the relationship between direct thermal imaging of infrared light or ultraviolet light, which should be translated into a plate imaging machine. The finished product it obtains is a pattern, thus getting rid of the concept of backward phototypesetter. Countries in Europe and America have advocated the integration of DTP and CEPS technologies, and Japan has followed suit. The CEPS referred to here refers to the Color Electronic prepress System May wish to briefly introduce the technical integration effect of the two. CEPS is an electronic plate-making system with high image processing capabilities. Incorporating CEPS into the DTP operating environment can greatly improve image quality. After merging the two, it is for effective operation. First of all, in terms of CEPS, a plate-making scanner is used to decompose high-quality images for revision. Then give the user the data with low resolution, please arrange the layout for it. The data designed by the version is transferred to CEPS, and the low-resolution image is converted into a high-resolution image. Because image processing is processed on CEPS, it is necessary to re-edit on CEPS when using editing data. In order to carry out a good fusion operation according to the above, the size of the photo must be adjusted to some extent at the time of color separation. At this time, you should pay attention to the operation: once you use an application software other than layout software to correct the image, the original image cannot be replaced. Even if you use low resolution data to draw the layout, you can also enlarge, reduce, Shift, etc. However, changes to the image magnification will cause image degradation, so I hope to control it within the range of 80% to 120% to solve it. If you need to zoom in or out beyond this range, you need to perform color separation processing again when you need to zoom in and out beyond this range. In addition, during image conversion, if the file name is not the same as the original data and file name, it cannot be converted, so the file name cannot be changed at will. At the time of receiving the manuscript, the low-resolution image files used must be placed in the same folder as the prepared files. The following may illustrate the technical environment in which DTP and CEPS are integrated, and clarify the roles and positions of imagesetter and platesetter in this environment, so that it can be concluded that an appropriate title should be chosen for them. 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