In digital printing, page description technology, image processing technology, digital pre-press technology and digital hardware are indispensable support, of which RIP (rasterized image processor) and digital itself are the most critical. The advancement of page description technology in digital printing has promoted the development of digital printing production, especially the development of RIP, which plays a key role in digital printing to output the pages that users want. , It can be digitally output on a specific medium. Because digital printing can be 100% variable information, two adjacent prints can be completely different, and require a high output speed (should be comparable to the speed of traditional paper offset presses), so RIP is required to have a very high Processing speed. In addition, with the continuous improvement of digital printing quality, the resolution is constantly increasing, which increases the requirements for RIP speed and function, so image processing technology is the key technical foundation of digital printing technology.
Digital image processing technology has laid the foundation for digital printing production. Among the three objects of printing and copying, namely text, graphics and images, image processing is the most important and complex. Digital image processing is a technology that converts analog image signals into digital image signals and processes them according to specific requirements. It is necessary for prepress image processing technology and is also important for digital printing. In fact, digital image processing technology Infiltrating the entire process of digital printing, from the input of the manuscript to the digitization to the processing output, all require the support of digital image processing technology.
Digital prepress technology is a direct driving force for digital printing production. Digital prepress technology integrates all the prepress processes such as manuscript input, image processing, word processing, image design and production, typesetting, color separation, screening, and output. Combined, using digital work methods, continuously improve work efficiency and improve product quality. The development of digital prepress technology extends to the postpress process, and the page information is directly output to the printing medium, that is, digital printing is produced.
Digital is actually a high-speed hard copy conversion, which is responsible for high-speed conversion of digital pages into high-quality monochrome or color hard copies, that is, printed matter. At present, there are five kinds of digital methods used in electrophotography, inkjet imaging, electrocoagulation imaging, magnetic recording imaging, and ion deposition imaging. Among them, electrophotography (laser imaging, dry powder) and inkjet imaging are the main digital imaging methods.
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