What is a PDF file? Unlock the Benefits Today!

PDF

What is a PDF file? A PDF (Portable Document Format) file represents documents in a manner independent of the hardware, software, and operating system used to create them. This portability allows any device with a PDF reader to open and view PDF files.

PDF files employ a unique file format that uses the PostScript programming language for document representation. The structure of a PDF file comprises several different elements:

  • A header that contains information about the PDF file format’s version, encryption (if any), and other metadata.
  •  A body that contains the document’s content.
  • Text, images, vector graphics, and other types of data can all be included.
  • An index that allows the PDF reader to locate specific objects within the file quickly.
  • A table of contents or outline that allows the user to navigate through the document.
  • A cross-reference table, which is optional, that lists the location of each object in the file.

An optional trailer containing file information such as the index location and total number of objects in the file.

PDF files can also have extra features like interactive forms, annotations, and hyperlinks.

A PDF file’s internal structure consists of a series of objects that represent the document’s various elements, such as text, images, and interactive elements. The document object model is a tree-like structure that organizes these objects to represent the logical structure of a document and to define the relationships between its various objects.

A PDF file contains a series of dictionaries and streams that contain metadata and other information about the document. This includes information such as the document’s author, title, and subject, as well as the fonts and colors used.

PDF files have a specific structure that includes a variety of objects.

  • The document information dictionary contains metadata about the PDF document such as the title, author, subject, and keywords.
  • Page tree: A tree-like structure that defines the layout and order of the PDF document’s pages.
  • Pages: A page object represents each page in a PDF document, defining the size and orientation of the page as well as any content displayed on the page.
  • Content streams: These streams contain the PDF document’s actual content, such as text, images, and graphics. To reduce the size of the PDF file, you usually compress the content streams.
  • Resources are objects that the content streams use to display the content of the PDF document. Fonts, images, patterns, and color spaces are examples of resources.
  • You can add interactive elements like links, buttons, and form fields to a PDF document by using annotations. Outlines: These objects define the PDF document’s hierarchical structure, allowing the user to navigate through the document by clicking on headings or other defined elements.
PDF files include metadata, which provides information about the document not contained in the content itself.This can include keywords, the author of the document, and the software used to create it.
 
You can use a variety of software tools to create PDF files, including Adobe Acrobat, LibreOffice, and GhostScript. Adobe Acrobat or other PDF viewers allow for viewing and editing these files.

Mapsoft and PDF

If you’re looking for a company with unparalleled expertise in PDF, look no further than Mapsoft. Our Technical Director, Michael Peters, was instrumental in developing the first-ever PDF Export for Adobe PageMaker in collaboration with Adobe Systems, Inc. With years of experience in this domain, we have an array of plug-ins that operate seamlessly within Adobe Acrobat, and we’re also proud to be an OEM licensee of the Adobe PDF Library. Whether you need customized PDF solutions or products, we’ve got you covered. Get in touch with us today to learn more.
 
Contact Info:
mpeters@creativeaddonshub.com
https://www.linkedin.com/in/mpmapsoft/
https://creativeaddonshub.com
 
 

What is a PDF file and Why It Matters

Why Plugins Matter?

Plugging Plug-ins – Why Third-Party Software Matters

Any professional racing driver will tell you that there’s no such thing as too much power.  Give them a new, 1000-horsepower engine and after 5 laps, they’ll pull into the pits and say:  “Great, but can you give me 1100bhp?”   It’s just the same with software – especially software that’s as versatile as Adobe Acrobat and CC products such as Adobe InDesign, Adobe Illustrator and Adobe Photoshop.

The Inevitable Limitations of Software Applications

No matter how powerful, flexible or easy-to-use the application, as soon as users get to grips with it, they’ll find it doesn’t quite do exactly what they want it to.  Or they’ll want it to be just that bit easier to do a certain function or perhaps be able to batch functions together. This isn’t greed, or customers being niggly – on the contrary, it’s actually a compliment that the original application is proving useful.  It simply underlines that there’s no such thing as the perfect program.

Bridging User Needs with Third-Party Solutions

Users often don’t express their exact needs initially. Instead, they highlight desired improvements to existing solutions. This scenario opens opportunities for third-party developers and their plugins. These developers typically engage closely with user communities, such as forums, to understand their needs. Questions like “How can I do this?” or “Is there a tool for that?” signal potential market gaps.

For instance, repeated requests to mask sensitive information in PDF documents indicate a demand for new solutions. This was the case for Mapsoft. By aligning closely with the Adobe user community, Mapsoft identified and filled such needs, expanding its range of plugins.

Among its offerings, Impress Pro stands out. This plugin allows adding text stamps to documents, serving as watermarks or headers and footers. Other innovative solutions include MaskIt, for hiding confidential content, and DogEars, a tool that marks pages for easy reference, akin to a physical bookmark. Additionally, TOCBuilder offers the creation of a linked and printable table of contents, enhancing document navigation.

So what should you look for in a third-party developer?

Evaluating a Developer’s Endorsement and Partnerships

Firstly, consider if the developer is endorsed by the main vendor’s partner programme. This is crucial. For instance, Mapsoft, an Adobe Business Partner, boasts over 30 years of experience developing plugins for Adobe products.

Assessing Product Integration with Main Vendor’s Technology

Secondly, evaluate how the developer’s products integrate with the main vendor’s technology. Products should be developed using the main vendor’s core technology to ensure reliability and seamless functionality. Mapsoft exemplifies this by licensing A dobe’s core technology for their plugins and customized products.

Opportunities for Product Evaluation

Thirdly, check if the product can be evaluated before purchase. This is vital to ensure it meets user needs. Developers confident in their solutions typically offer evaluation versions. Mapsoft, for example, provides free evaluation versions of all their plugins on their website.

Developer Support and User References

Finally, consider the developer’s support and the availability of user references. This indicates a long-term commitment to quality and customer satisfaction. With over 30 years in the sector and partnerships with high-profile companies like Network Rail, Xerox, and Hallmark Cards, Mapsoft demonstrates its expertise and dedication. They also offer one year of free support for their software solutions.

Conclusion

By keeping these points in mind, you can ensure you choose effective and reliable plugins that enhance your main application, streamline tasks, and add valuable features and functionality.

Contact info:

mpeters@creativeaddonshub.com

https://www.linkedin.com/in/mpmapsoft/

https://creativeaddonshub.com

 Related Links:

Is PDF accessible?

Is PDF accessible?

Overview

Accessibility in software refers to the design and development of software that is usable by people with disabilities. Keyboard shortcuts, screen reader compatibility, and high contrast modes are examples of such features. It also includes ensuring that the software can be used with assistive technology, such as screen readers and magnifiers, and that it can be navigated using only a keyboard. Text-to-speech and speech-to-text functionality can also be included in accessible software, making it easier for people with disabilities to interact with the software.
Accessible software is essential because it ensures that everyone, regardless of ability, can use and benefit from it. Making sure that people with disabilities have equal access to information and technology is not only a legal requirement, but also a moral imperative.

The Portable Document Format (PDF) is a file format developed by Adobe Systems. PDF makes it possible to distribute documents with original formatting intact. PDF files are created by scanning an original print document or by using a variety of popular software applications. 

Accessibility

The popularity of PDF has created concerns about accessibility, particularly for users of screen readers and for those who have low vision. While Adobe has taken steps to permit access to those who use screen readers, it is essential that documents be correctly marked up (commonly referred to as “tagged”) so that screen readers have the information they need to identify items such as headings and alt text for images. Tables must also be marked up so that screen reader users can navigate them and clearly understand the association of data with appropriate column and row names.

Tagged PDF

Few authors are currently creating tagged PDF files, either because this requires additional effort or because of lack of awareness. Authors are also limited by the capabilities of their word processing or desktop publishing tools, many of which have PDF export capabilities that do not currently support tagged PDF. Microsoft Office, particularly with its most recent versions, does provide good PDF exporting, assuming that appropriate styles are used when first creating a document in Word.

Available Documentation

Adobe provides accessibility documentation at adobe.com/accessibility. Among other resources available from this site, Adobe has developed a variety of Acrobat accessibility training resources that describe in detail the process of creating accessible PDF documents using Word, InDesign, and Acrobat. 

Support In Operating Systems

PDF accessibility also requires support from operating system and assistive technology developers. In Microsoft Windows, both JAWS and NVDA support tagged PDF. However, there is currently no support for tagged PDF in other operating systems.

Is PDF the Correct Choice of Format

Despite advances in accessibility, many users and advocacy groups continue to recommend that PDF documents be accompanied, or replaced, by alternative format documents that are more universally accessible, such as HTML. PDF unfortunately is still not indexed as well as HTML and so if content is to be used for SEO then it is often converted to HTML. 

Contact Info:

mpeters@creativeaddonshub.com

https://www.linkedin.com/in/mpmapsoft/

https://creativeaddonshub.com

Adobe PDF Base-14 Fonts

Adobe PDF Base-14 Fonts

A number of fonts are included with Adobe Acrobat and therefore don’t need to be embedded in PDF files. In our products Impress, Impress Pro and TOCBuilder these fonts are marked in the font lists in Red:

  • 4 font sets in the Helvetica family: normal, bold, and bold italic, with any size. XSL-FO “sans-serif” font family is normally mapped to “Helvetica”.
  • 4 font sets in the Times family: normal, bold, and bold italic, with any size XSL-FO “serif” font family is normally mapped to “Times”.
  • 4 font sets in the Courier family: normal, bold, and bold italic, with any size. XSL-FO “monospace” font family is normally mapped to “Courier”.
  • 1 font sets in the Symbol family: normal, with any size. “Symbol” is normally used for Greek alphabets and some symbols like: Ω, φ, ≠, ©.
  • 1 font sets in the ZapfDingbats family: normal, with any size. “ZapfDingbats” is normally used for Zapf dingbats like: ✌, ✍, ❀, ☺.
Also see our blog on the demise of Type 1 fonts: Type 1 Font Support Ending
Contact Info:
mpeters@creativeaddonshub.com
https://www.linkedin.com/in/mpmapsoft/
https://creativeaddonshub.com

Camelot Project – the Precursor to PDF and Acrobat

The Camelot Project

 J. Warnock 

This document describes the base technology and ideas behind the project named “Camelot.” This project’s goal is to solve a fundamental problem that confronts today’s companies. The problem is concerned with our ability to communicate visual material between different computer applications and systems. The specific problem is that most
programs print to a wide range of printers, but there is no universal way to communicate and view this printed information electronically. The popularity of FAX machines has given us a way to send images around to produce remote paper, but the lack of quality,
the high communication bandwidth and the device specific nature of FAX has made the solution less than desirable. What industries badly need is a universal way to communicate documents across a wide variety of machine configurations, operating systems and communication networks. These documents should be viewable on any display and should be printable on any modern printers. If this problem can be solved, then the fundamental way people work will change. 

The invention of the PostScript language has gone a long way to solving this problem. PostScript is a device independent page description language. Adobe’s PostScript interpreter has been implemented on over 100 commercially available printer products.
These printer products include color machines, high resolution
machines, high speed machines and low-cost machines. Over 4000 applications output their printed material to PostScript machines.
This support for PostScript as a standard make the PostScript
solution a candidate for this electronic document interchange. 

Within the PostScript and Display PostScript context the “view and print anywhere” problem has been implemented and solved. Since most applications have PostScript print drivers, documents from a wide variety of applications can be viewed from operating systems that use Display PostScript. PostScript files can be shipped around communication networks and printed remotely. “Encapsulated PostScript” is a type of PostScript file that can be used by many applications to include a PostScript image as part of a page the application builds. 

The reason the Display PostScript and PostScript solutions are not a total solution in today’s world is that this solution requires powerful desktop machines and PostScript printers. The Display PostScript and PostScript solutions are the correct long-term solution as the power of machines increases over time, but this solution offers little help for the vast majority of today’s users with today’s machines. 

The Camelot Project is an attempt to define technologies and
products that will give the value that Display PostScript and
PostScript delivers to the vast number of installed machines that exists today. For the purposes of this discussion these machines include 640K Intel 286/386/486 machines (PC compatibles), Apple Macintosh machines, mainframes, and workstations. The displays must include CGA, EGA, VGA and any other higher resolution or color displays supported by the above machines.

Our vision for Camelot is to provide a collection of utilities,
applications, and system software so that a corporation can
effectively capture documents from any application, send electronic versions of these documents anywhere, and view and print these documents on any machines. 

There are at least two technical approaches to the Camelot project. Both solutions depend on the PostScript technology. One approach is to try to make Display PostScript and PostScript implementations smaller and faster so that they can run on the vast majority of today’s machines. This approach has been tried and is extremely difficult. 

A second approach is to divide the problem into smaller problems. This approach would allow each piece to run independently on the smaller machines while achieving acceptable performance and a solution for the complete problem. This latter approach requires that the problem be divided in a way that is natural for users, and provides a solution for every user. An approach to the Camelot project will now be described that will divide the problem into smaller pieces. This solution depends on a unique property of the PostScript language. 

PostScript, as an interpretive language, has some properties that other interpretive languages do not have. In particular, the semantics of operators is not fixed. Operators can be redefined to have any desired behavior. This property of PostScript allows the execution of a PostScript file to have side effects that are very different from the normal printing of a page. An example might be instructive. Suppose a PostScript file draws 10 sided polygon with the following PostScript procedure: 

				
					/poly 

    {1 0 moveto 

        /ang 36 def 

        10 {ang cos ang sin lineto 

         /ang ang 36 add def 

     }repeat 

 }def 
				
			

This procedure will build a path that is a ten sided polygon. In this procedure the verbs: “moveto” and “lineto” have the standard semantics of building a PostScript path within the PostScript Language. 

By redefining “moveto” and “lineto” very different things can
happen. For example, if these operators are defined as follows: 

				
					/moveto 

    {exch writenumber writenumber (moveto) writestring}def 

/lineto 

    {exch writenumber writenumber (lineto) writestring}def 
				
			

then when the “poly” procedure is executed a file is written that has the following contents: 

				
					1.0 0.0 moveto 

0.809 0.588 

lineto
0.309 0.951 

lineto
-0.309 0.951 

lineto
-0.809 0.588 

lineto
-1.0 0.0 

lineto
-0.809 -0.588 

lineto
-0.309 -0.951 

lineto
0.309 -0.951 

lineto
0.809 -0.588 

lineto
1.0 0.0 

lineto
				
			

In this example the new redefined “moveto” and “lineto” definitions don’t build a path. Instead they write out the coordinates they have been given and then write out the names of their own operations.
The resulting file that is written by these new definitions draws the same polygon as the original file but only uses the “moveto” and “lineto” operators. Here, the execution of the PostScript file has allowed a derivative file to be generated. In some sense this derivative file is simpler and uses fewer operators than the original PostScript file but has the same net effect. We will call this operation of processing one PostScript file into another form of PostScript file “rebinding.“ 

The above example illustrates a capability of the PostScript language that is not frequently used. This “rebinding” of the language, however, is extremely valuable. The Camelot project depends on variations on this idea. 

The approach we will take with Camelot is to define a new language of operators and conventions. For the purposes of this discussion we will call this language “Interchange PostScript” or IPS. IPS will primarily contain the graphics and imaging operators of PostScript.
The language will be defined so that any IPS file is a valid PostScript file. The file will have the appropriate baggage so that it is a valid EPS file. IPS files will print on PostScript printer and will be able to be used by applications that accept EPS files. IPS will also be structured so that the complete PostScript parser is not necessary to read any file written in IPS. IPS will have an adequate set of operators so that any practical document expressed in PostScript can be represented in IPS. There will be situations in IPS where the IPS file cannot represent visual situations that can be theoretically generated in PostScript. However we believe these situations are extremely rare, and all practical application documents can be represented efficiently in IPS. The right way to think about IPS is as it relates to English. No person in the world knows every English word, but a small subset of the English words, and certain usage patterns enable people to consistently communicate. 

Once we have defined IPS, we will build a version of the PostScript interpreter (IPS binder) that will read any PostScript file and rebind that file into an IPS file. The IPS binder can be quite small in that it does not need the graphics, font or device machinery contained in full PostScript interpreter. Another function of the IPS binder will be to include reconstituted fonts into the IPS file. The idea here is to include just the characters of a font that are actually used in the document. A result of including the necessary characters from the fonts used is that an IPS file will be completely self contained. In other words, when I send a file around the country, I don’t have to worry about whether the receiving location has all the fonts required
by the document. The current situation is that complex font
substitution schemes are used to deal with locations not having the appropriate fonts. 

Once IPS is defined and the IPS binder implemented, then users can capture any PostScript file emitted by a PostScript driver, and convert that file to a self contained IPS file. This file can be shipped anywhere around the network and printed on any PostScript machine (management utilities will be written to ease this printing process.) 

In addition to the IPS binder, a viewer and browser will be written that will read IPS files, and render those files on displays or to dumb raster printers. It is believed that IPS interpreters can be substantially simpler, and smaller than full PostScript interpreters. It is also believed that an IPS interpreter can have acceptable performance on small machines. The real hope is to make the IPS viewer and browser small enough so that it can co-exist with other applications. It is interesting to think about what those applications can be. 

One obvious application for the IPS viewer is in its use in electronic mail systems. Imagine being able to send full text and graphics documents (newspapers, magazine articles, technical manuals etc.) over electronic mail distribution networks. These documents could be viewed on any machine and any selected document could be printed locally. This capability would truly change the way information is managed. Large centrally maintained databases of documents could
be accessed remotely and selectively printed remotely. This would save millions of dollars in document inventory costs. 

Specific large visual data bases like the value-line stock charts,
encyclopedias, atlases, Military maps, Service Manuals, Time-Life Books etc. could be shipped on CD-ROM’s with a viewer. This would allow full publication (text, graphics, images and all) to be viewed and printed across a very large base of machines. 

Imagine if the IPS viewer is also equipped with text searching
capabilities. In this case the user could find all documents that
contain a certain word or phrase, and then view that word or phrase in context within the document.
Entire libraries could be archived in electronic form, and since IPS files are self-contained, would be printable at any location. 

One of the central requirements of the Camelot Project is that the IPS file format is device independent. This is essential because it is necessary to be able to print the documents on color or black and white machines — on low or high resolution machines. This requirement is also essential in order to visualize the documents at various magnifications on the screen. For example, it is imperative that the user be able to magnify portions of complex maps, so that subportions of the image are easy to read even on low resolution displays. 

To accomplish the above requirement it is necessary that consistent font rendering machinery be available to the viewer. For this reason the viewers will need to contain the full ATM implementations as part of each system. 

In considering all the requirements of corporations regarding
documents, it is important to structure Camelot components so that they can be sold in ways that are useful to the corporations. Several ideas have come to mind. 

Components of Camelot are generally not interesting to single users. The exception to this is in the distribution of large generally useful databases. If someone produced a CD-ROM with “maps of the world” on it, then one can imagine selling a retail package with one viewer and the CD-ROM. 

In most other applications, the distribution of information is to many people. In these latter cases a corporation would like a copy of the viewer for every PC. One can imagine viewers integrated into mail systems, or as general stand-alone browsing systems. In any event corporations should be interested in site-licensing arrangements.
(more to come)

Author: John Warnock

Editor for the purposes of this page:  Michael Peters

mpeters@creativeaddonshub.com

https://creativeaddonshub.com

History of PDF

A Short History of PDF (Portable Document Format)

Adobe Systems made the PDF specification available free of charge in 1993. In the early years PDF was popular mainly in desktop publishing workflows and the first PDF Export was created for PageMaker 5 by Mapsoft. PDF competed with a variety of formats such as DjVu, Envoy, Common Ground Digital Paper, Farallon Replica and even Adobe’s own PostScript format.

Released as an ISO standard

 

PDF was a proprietary format controlled by Adobe until it was released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008,[5][6] at which time control of the specification passed to an ISO Committee of volunteer industry experts. In 2008, Adobe published a Public Patent License to ISO 32000-1 granting royalty-free rights for all patents owned by Adobe that are necessary to make, use, sell, and distribute PDF-compliant implementations.[7]

PDF 1.7, the sixth edition of the PDF specification and the version accompanying Acrobat version 8 became ISO 32000-1, includes some proprietary technologies defined only by Adobe, such as Adobe XML Forms Architecture (XFA) and JavaScript extension for Acrobat, which are referenced by ISO 32000-1 as normative and indispensable for the full implementation of the ISO 32000-1 specification. These proprietary technologies are not standardized and their specification is published only on Adobe’s website, and many of them are also not supported by popular third-party implementations of PDF.

In December, 2020, the second edition of PDF 2.0, ISO 32000-2:2020, was published, including clarifications, corrections and critical updates to normative references.[13] ISO 32000-2 does not include any proprietary technologies as normative references.[14]

Information taken in part from Wikipedia

Author:  Michael Peters

mpeters@creativeaddonshub.com

https://creativeaddonshub.com

Mapsoft is a member of the PDF Association https://pdfa.org/.

Summary of the Structure of PDF files

Deeper Insight into the Complex Structure of PDF Files and Their Key Components.

PDF file format structure can be looked upon as a combination of different file types presented in a single container. The reason for this is that a PDF file contains Text, vector art, images, fonts and other file format can be embedded – even the native files that were used to create the PDF in the first place.

The complex structure of PDF files consists of objects where items can be connected directly or indirectly to each other. Often the indirection is because an object might is used multiple times as would be the case for a logo, font, color.

The objects within a PDF file can be divided into the following types:

Dictionaries

A group containing direct or references to indirect objects. Dictionaries can be seen as the glue holding together the elements in a PDF files. The example below shows the structure of a typical page dictionary:

The Contents stream has an attributes dictionary that contains a filter name and the length of the stream
The CropBox array contains the coordinates of the rectangle that defines the area that is visible on the page.
The MediaBox array contains the coordinates of the rectangle that defines the media size. This will typically match a standard media size such as Letter or A4 and will allow the PDF page to be reliably printed on a device that contains these standard media sizes.
The Resources dictionary contains references and information for elements that are needed to reliably output the visual elements of the page such as colors, fonts and Images.

Streams

The collection of operators outputting information onto the page. Normally the stream will also require elements of the page resources dictionary such as colors and fonts. Streams are either stored as a single element or in an array.
 
				
					q
567.48 61.011 -540 720 re
W* n
q
/GS0 gs
0 720 -541.1399536 0 567.4799194 61.0105438 cm
/Im0 Do
Q
Q
/CS0 cs 0.302 0.302 0.302  scn
1 i 
/GS1 gs
56.7 286.911 m
56.7 295.191 56.7 303.471 56.7 311.751 c
59.1 311.751 61.5 311.751 63.9 311.751 c
63.9 306.831 63.9 301.911 63.9 296.991 c
65.88 296.991 67.8 296.991 69.72 296.991 c
69.72 301.191 69.72 305.391 69.72 309.591 c
72 309.591 74.22 309.591 76.5 309.591 c
76.5 305.391 76.5 301.191 76.5 296.991 c
81.06 296.991 85.62 296.991 90.18 296.991 c
90.18 293.631 90.18 290.271 90.18 286.911 c
79.02 286.911 67.86 286.911 56.7 286.911 c
f*
				
			
You can see that there are several references to items in the page resources dictionary:
GS0 is a reference to a graphics state and gs is the operator that sets it.
Im0 is an XObject image and the Do operator draws the image.
CS0 is a reference to a color dictionary and the scn operator assigns it to strokes.
 
You can also see usage of several path operators re – rectangle, m – moveto, c – curve f* – fill.
 

Text strings

These can either be ANSI (single byte characters) or Unicode (multi-byte). The example here is the representation of the last date modified in the catalog dictionary.These can either be ANSI (single byte characters) or Unicode (multi-byte). The example here is the representation of the last date modified in the catalog dictionary.

Images

Images are normally held within the page resources and the stream will also have an associated Attributes dictionary that will describe the attributes of the data within the stream. BitsPerComponent size of the data that is used to define a single pixel (dot) within the image. The ColorSpace dictionary describes the colour model that is used to define the colors within the image.

Names

Used normally to provide a name that can be used to refer to a dictionary or dictionary item. For example, the pages dictionary has a name “Type” with the value “Pages” and a single page has a name of “Type” with a value of “Page”.

Arrays

Fixed length data holding types and/or references to other elements. For an example see the Real Numbers example below.

Real numbers

Decimal numbers. In this example they are being used to define the rectangle of the page media box:

Integers

Whole numbers. For example to show the total number of  pages in the PDF file.

For further details on pdf file format structure see the PDF Specification at https://www.adobe.com/devnet/pdf/pdf_reference.html
 
Contact:
 
Michael Peters

Understanding of Color and Color models

Understanding Color Models: A Beginner's Guide to Color Theory

I am only going to cover 2 of the many color models here because they are the most often used.

RGB

This color model is primarily used to describe light. It is used mainly in cameras and scanners. It has 3 color elements that when added together at 100% represent white or pure light. The 3 different colors are Red, Green and Blue. The color model is almost infinite in its range and this in itself is ok until printing is required and that printing is being done through the CMYK color model. The model uses 3 values with each being in a range between 0 and 255 as in the Windows and applications such as Photoshop or as a decimal number up to a maximum of 1 in PDF for example. 
 
RGB is an additive color model. Adding all of the colors in equal amounts will result in white.

In the web world RGB colours are represented by hex number combinations (the numbering system is ). So for example Red would be #FF0000, Green would be #00FF00 and Blue would be #0000FF. Black is #000000 and White is #FFFFFF. 

CMYK

What color model is used in printed designs? This is usually Cyan/Magenta/Yellow/Black (CMYK) color model and is mainly used in color printing.
 

Printing the colors on top of each other creates the colors necessary to achieve the required shades. Overlaps may be necessary at the edges (trapping) to prevent visibility of spaces as different paper types can expand and shrink when applying ink/toner. Compared to RGB, the CMYK color model offers a much more limited range, necessitating careful conversion from RGB to CMYK. Color management systems, the addition of extra colors to the print run (such as Hexachrome), or the use of pre-mixed Spot colors like Pantone can accomplish this. The resolution of the input and output and the paper stock used in printing, including the surface quality and base color of the media type as well as the ink attributes, affect printing. Moreover, varnishes such as UV and foils can modify and enhance output effects and colors to provide metallic effects.

The CMYK color model assigns 4 values, each representing a percentage of the four colors: cyan, magenta, yellow, and black.

CMYK operates as a subtractive color model, where adding all colors in equal amounts theoretically results in black. However, CMYK typically produces a dirty color, so incorporating the K (black) achieves a true black for printing.

This is a simple look at color and I will expand on this in a future blog.

Amazon link

Victor Perez’s “The Color Management Handbook for Visual Effects Artists” is a vital resource aimed at demystifying color management for VFX professionals. This guide, grounded in research from leading color scientists, navigates through the nuances of high dynamic range (HDR) and Academy Color Encoding System (ACES) workflows. It’s designed to educate artists at all levels, ensuring a solid grasp of color management principles to enhance the quality of visual effects globally. This comprehensive book covers from basic color theory to sophisticated digital imaging techniques, promoting a unified approach from camera to screen.

What is an Acrobat Plugin?

What is an Acrobat Plugin?

An Adobe Acrobat plugin is a software component that can extend the functionality of the Adobe Acrobat reader/viewer application, a popular program for viewing, creating, and editing PDF documents. Plugins can add new features to Acrobat, such as the ability to create interactive forms, add watermarks, or perform advanced document processing tasks. Some plugins are developed by Adobe, while others are created by third parties. These plugins can be installed within the Acrobat application such as our TOCBuilder plugin are typically activated when a particular action or task is performed within the software.

Adobe Acrobat Reader plugin

Why do we need plugins?

To make Adobe Acrobat more flexible and applicable to a broader range of industries and organizations, the number of built-in features must be restricted to the wider community. This is because adding features that serve only a small portion of Acrobat’s user base would unnecessarily increase the application’s size. Consequently, plugins are required to add functionality as required by the user.

Can Acrobat plugins be used in the Adobe Reader?

Special support needs to be added to the plugin so that it can run under Adobe Reader. However the Reader plugin will require a special license and needs to go through an approval process with Adobe Systems Inc. – https://www.adobe.com/devnet/reader/ikla.html.

Are plugins specific to a particular version of Adobe Acrobat?

We have plug-ins that we developed for Acrobat 6 that still run without modification in Acrobat DC. However, if new features are used that are specific to a later version then it won’t work under later versions. If earlier versions used the Adobe Dialog Manager (ADM) then they won’t now work in current versions of Acrobat.
 

Update:

Probably the biggest change in this last year was the introduction of the 64bit version of Acrobat which has also meant the rebuilding of our Acrobat Plugins to support it.. This has basically meant a rebuild of all plug-ins so that they will run on both platforms. In this process we decided to remove a number of our products that are now decades old and concentrate on maintaining and improving a subset of the products.

Examples of Plugins

  • New security handlers that might be specific to a particular organisation. For example, we have developed security handlers that do not allow PDF files to be viewed outside a particular organisations offices. 
  • New annotations types. For example, we created a plugin that supported all of the British Standard Markups.
  • Flattening annotations and form fields into the main document. This ensured that they could not be changed or modified and that they would print as part of the document even if the printing of annotations was switched off.
  • Adding text and images to PDF files.
  • Creating a table of Contents for PDF files
  • Automating the creation of bookmarks based on the styles in a pdf file.
  • Adding fields for variable data printing
  • Hardware integration of Adobe Acrobat into whiteboards and interactive tables

DiamondTouch Table and Adobe Acrobat Integration

DiamondTouch Table and Adobe Acrobat Integration

The worlds first multi-user touch table and a plug-in developed by Mapsoft running under Adobe Acrobat. 

Transcript

(00:00) hello my name is adam bogue and this is the diamond touch table 

(00:04) it’s the first instill only multi-user touch 

(00:07) technology capable of supporting multiple simultaneous users 

(00:12) and it knows who’s who here let me show you how diamond touch is different than 

(00:16) other multi-touch displays that you might have seen before (00:22) so obviously this is a touch screen but the thing that makes it different 

(00:26) is that diamond touch is multi-user and i have a little demo that illustrates 

(00:30) what i mean by that so when i touch it’s blue and 

(00:35) when these guys touch do you see how each of us is a different color (00:40) no matter where you touch diamond touch knows who’s who (00:43) and the point here is we wanted to create a new type of computer interface (00:47) to support small group face-to-face collaboration 

(00:51) laptops tablets smartphones those were all designed for individual users 

(00:57) of course you can use these devices to connect to other individuals 

(01:01) but if you’re in the same place with other people and you’re trying to work 

(01:04) together you know these devices get in the way 

(01:07) that’s why people often print things out when they’re going to meet 

(01:11) the best a traditional computer can do is to let one person drive while 

(01:15) everybody else kind of looks over that person’s shoulders 

(01:18) and that’s no good with diamond touch everybody can be face to face 

(01:22) and everyone can drive at once so here’s my desktop my finger’s a mouse 

(01:30) here’s another big difference between diamond touch and other touch screens 

(01:33) you know how windows only has one cursor well right now i have it 

(01:38) and if someone tries to take it from me they can’t have it until i let go and 

(01:44) then they can have it this is a subtle point but other touch 

(01:48) screens can’t do that other touch screens kind of freak out 

(01:51) when multiple people touch the cursor jumps around and you’d never 

(01:55) get anything done that’s why most tabletop touch screens 

(01:59) avoid the frustration by making it only work with special 

(02:03) applications specifically designed for their hardware 

(02:06) whereas diamond touch works with anything 

(02:14) that’s a double click my fist is a scroll wheel (02:19) yeah you got it now because most business software is 

(02:24) single user what we’ve been doing is to make other people’s software 

(02:28) multi-user aware and here’s an example diamond touch can be used by engineers 

(02:32) and architects for design review meetings 

(02:35) of course a long time ago these design review meetings 

(02:38) took place about a large piece of paper a blueprint or a schematic 

(02:43) and people were face to face now with everything done in cad 

(02:48) people are making their design review comments in the computer 

(02:51) one person at a time and it’s a lot less efficient 

(02:55) people don’t have the opportunity to be face to face 

(03:02) so this is a drawing of a building it’s a pdf 

(03:06) what we did is we made a plug-in tool for adobe acrobat that lets you 

(03:10) do some new things it makes it diamond touch or multi-user aware 

(03:14) first of all you can do the two-finger zoom this is a pan gesture 

(03:18) now if we’re doing commenting for design review 

(03:21) we can do it multi-user style so we have these tools here this is mine 

(03:26) and that’s yours when i draw here you can see that shows 

(03:31) up here in the comment pane with my name on it 

(03:34) now when you guys draw right so we can all be working at the same 

(03:39) time here i can highlight this text i can open up a tool like this 

(03:50) and automatically a keyboard pops up if you’re meeting with a client you can 

(04:02) capture the customer approval right here in the document with these 

(04:05) stamps and again because we know who’s who 

(04:07) we know who it was that approved the document and when 

(04:11) and when this is another example of something that you can only do 

(04:16) on the diamond touch table because it knows who’s who 

(04:19) not just multi-touch multi-user touch

Video Summary

The video features Adam Bogue introducing the Diamond Touch table, a unique multi-user touch technology that supports multiple simultaneous users and distinguishes between them. 

Unlike other multi-touch displays, Diamond Touch allows each user to interact with the screen in a distinct color, enabling a collaborative environment where multiple people can work together face-to-face without the barriers typically introduced by personal devices like laptops, tablets, and smartphones. 

The technology is designed to enhance group collaboration, making it ideal for settings where face-to-face interaction and simultaneous input from multiple users are beneficial, such as in design review meetings or collaborative projects. 

Diamond Touch also integrates with existing software, making it versatile and adaptable to various applications. The demonstration highlights features like multi-user commenting on a PDF document, showcasing how Diamond Touch can make software multi-user aware and facilitate more efficient and interactive meetings.