PDF has more advantages. In 1993, Adobe launched Acrobat and launched PDF at the same time. It was mainly to solve the problems of file platform, cross-software and cross-lingual information transfer. After continuous improvement and improvement, it has now been developed to PDF 1.2, 1.3, which enables PDF to function and condition as the most suitable page description language for the prepress process. Many well-known manufacturers and Agfa, Heidelberg, and Scitex have supported and used the PDF page description language in their own products. The Agfa technical information is cited here.
With reference to Agfa technical information, it can be concluded that:
Postscript is a general-purpose programming language that includes procedures, variables, and control structures. This means that a certain Postscript file needs to be interpreted first to be able to render the page. Different application software will generate different types of Postscript, which complicates page description, and this complexity leads to unpredictable output. Furthermore, since the imaging operations performed on the subsequent pages in the file depend on the settings that have accumulated from the first page, the Postscript file itself does not have page independence.
PDF files can be converted from Postscript files that contain the same imaging operations as the PostScirpt language files, which can be conveniently described in a database. In PDF files, the pages are completely independent of each other, and Postscript's apparent arbitrariness is avoidable. PDF can provide stable and predictable output for print production systems.
In short, PDF has the following characteristics:
The PDF format is standardized. Although different software may generate different Postscript files, as a book uses multiple grammars to cause trouble for readers, it will impose an additional burden on the workflow. But the conversion from PostScrjpt to PDF turns this book into "single-grammar" PDF: an exquisite, highly standardized and structured approach to using a target database to describe everything on every page. . These goals are easy to access and standardize, and do not require complicated programming skills to describe the content of the page. Each PDF file is just like a target data. This database includes the created file content data, fonts, graphics, annotations, variable data, connections to databases, and connections to digital sounds and images.
The PDF file is a predictable aspect. The PDF file solves many unpredictable problems caused by the page description complexity and output due to different application software may generate different types of Postscript; on the other hand, the PDF file utilizes related software or Soft plug-ins are pre-viewable. Thus, PDF files are predictable.
PDF files are visual and editable PDF files are unrelated to the platform, operating system and build software used. They can also be viewed in Macintosh, Windows and UNIX environments. PDF becomes a usable, identical, stable, consistent and predictable format for all files. Before entering the printing, the relevant soft plug-ins can be used to facilitate the post-stage text editing of PDF files.
The flexibility of the PDF format means that it is easy to change the existing PDF files to different repurposes, such as digital proofing and printing, multimedia CD-ROM, Intranet, and Internet publishing. Since PDF files can be viewed in popular browsers, they can be easily reused for Web sites; or they can be published on their favorite traditional media with only one design.
. PDF files have page independence In PostScirpt, processes, variables, and controls are done on a file (meaning multiple pages); PDF format allows you to focus on a single page. This is very important when different pages need to be processed differently in different files and different files, or only when the specified pages are to be impositioned or modified at the last minute and they need to be completed quickly. Since the PDF format is page-independent, it can be used across all platforms, operating systems, and application software, reflecting its ideal flexibility.
PDF format has better transmission performance It is still difficult to transfer large files today, requiring large and expensive storage space. The amount of information generated by PDF is a small file (PDF files use industry-standard compression algorithms, which are often smaller than comparable Postscript language files), and can be viewed at the top of the mast.å ‹?br>.
The PDF format is ideal for production workflows. PDF files contain fonts, graphics, and images in a single file, and have electronic transfer and pre-check integration capabilities. PDF can be used as "Digital Master" for other media. In addition, PDF files are highly optimized and structured and can considerably reduce the processing time on RIP.
Adobe Acrobat 3.0 and PDF Applicable to the Print Publishing Market Acrobat and PDF, which were developed by Adobe in the early years, focus on solving cross-platform, cross-software, and cross-font file transfer problems. Although the page independence features have been highlighted, they are still missing. Can be used for color high-grade printing, such as color conversion, CMYK output, spot color processing, double-byte processing, overprinting, OPI, some important features and functions, so that for color separation, black generation, background removal, overprint, halftone Images and other difficult to handle. After continuous improvement, according to the Adobe 3.0 PDF workflow, some features of Acrobat 3.0 are: (to be continued)
With reference to Agfa technical information, it can be concluded that:
Postscript is a general-purpose programming language that includes procedures, variables, and control structures. This means that a certain Postscript file needs to be interpreted first to be able to render the page. Different application software will generate different types of Postscript, which complicates page description, and this complexity leads to unpredictable output. Furthermore, since the imaging operations performed on the subsequent pages in the file depend on the settings that have accumulated from the first page, the Postscript file itself does not have page independence.
PDF files can be converted from Postscript files that contain the same imaging operations as the PostScirpt language files, which can be conveniently described in a database. In PDF files, the pages are completely independent of each other, and Postscript's apparent arbitrariness is avoidable. PDF can provide stable and predictable output for print production systems.
In short, PDF has the following characteristics:
The PDF format is standardized. Although different software may generate different Postscript files, as a book uses multiple grammars to cause trouble for readers, it will impose an additional burden on the workflow. But the conversion from PostScrjpt to PDF turns this book into "single-grammar" PDF: an exquisite, highly standardized and structured approach to using a target database to describe everything on every page. . These goals are easy to access and standardize, and do not require complicated programming skills to describe the content of the page. Each PDF file is just like a target data. This database includes the created file content data, fonts, graphics, annotations, variable data, connections to databases, and connections to digital sounds and images.
The PDF file is a predictable aspect. The PDF file solves many unpredictable problems caused by the page description complexity and output due to different application software may generate different types of Postscript; on the other hand, the PDF file utilizes related software or Soft plug-ins are pre-viewable. Thus, PDF files are predictable.
PDF files are visual and editable PDF files are unrelated to the platform, operating system and build software used. They can also be viewed in Macintosh, Windows and UNIX environments. PDF becomes a usable, identical, stable, consistent and predictable format for all files. Before entering the printing, the relevant soft plug-ins can be used to facilitate the post-stage text editing of PDF files.
The flexibility of the PDF format means that it is easy to change the existing PDF files to different repurposes, such as digital proofing and printing, multimedia CD-ROM, Intranet, and Internet publishing. Since PDF files can be viewed in popular browsers, they can be easily reused for Web sites; or they can be published on their favorite traditional media with only one design.
. PDF files have page independence In PostScirpt, processes, variables, and controls are done on a file (meaning multiple pages); PDF format allows you to focus on a single page. This is very important when different pages need to be processed differently in different files and different files, or only when the specified pages are to be impositioned or modified at the last minute and they need to be completed quickly. Since the PDF format is page-independent, it can be used across all platforms, operating systems, and application software, reflecting its ideal flexibility.
PDF format has better transmission performance It is still difficult to transfer large files today, requiring large and expensive storage space. The amount of information generated by PDF is a small file (PDF files use industry-standard compression algorithms, which are often smaller than comparable Postscript language files), and can be viewed at the top of the mast.å ‹?br>.
The PDF format is ideal for production workflows. PDF files contain fonts, graphics, and images in a single file, and have electronic transfer and pre-check integration capabilities. PDF can be used as "Digital Master" for other media. In addition, PDF files are highly optimized and structured and can considerably reduce the processing time on RIP.
Adobe Acrobat 3.0 and PDF Applicable to the Print Publishing Market Acrobat and PDF, which were developed by Adobe in the early years, focus on solving cross-platform, cross-software, and cross-font file transfer problems. Although the page independence features have been highlighted, they are still missing. Can be used for color high-grade printing, such as color conversion, CMYK output, spot color processing, double-byte processing, overprinting, OPI, some important features and functions, so that for color separation, black generation, background removal, overprint, halftone Images and other difficult to handle. After continuous improvement, according to the Adobe 3.0 PDF workflow, some features of Acrobat 3.0 are: (to be continued)
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