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Catégory : PDF

Using PDF Layers or Optional Content Groups (OCG) in GdPicture.NET

March 23, 2020

Communicating ideas in digital documents can often be made much clearer through the use of layers. Layers have been supported in PDF documents since version 1.5 through optional content groups (OCGs), also known as PDF layers. “Optional” is key here. OCGs allow us to group images or annotations together, then control their visibility based on […]

Methods with Losses: Mixed Raster Content (MRC) Compression

December 20, 2019

Previously in our PDF Optimization In-depth Series: 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compression of Streams and Fonts 4. Methods with Losses: JPEG 2000 and JBIG2 5. Methods with losses: resizing, color detection, and other techniques MRC compression in PDF documents […]

Methods with losses: resizing, color detection, and other techniques.

December 6, 2019

Previously in the PDf Optimization In-depth Series. 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compression of Streams and Fonts 4. Methods with Losses: JPEG 2000 and JBIG2 Resizing images Resizing images can provide significant gains in occupancy. For example, decreasing unnecessary high […]

Methods with Losses: JPEG2000 and JBIG2

November 29, 2019

Previously published in the PDf Optimization In-depth Series: 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content 3. Lossless Methods: Compression of Streams and Fonts Sometimes, when acceptable or necessary, it may be interesting to recompress images already included in an existing PDF file to reduce the […]

How to redact sensitive PDF content…efficiently.

November 4, 2019

Don’t get your fingers burned with uncovered sensitive data Have you ever heard of PDF Redaction? If not, well either you don’t have sensitive content to hide, either you are doing it the wrong way. If yes, ask yourself: am I redacting my files properly? In this article, you will learn how to redact PDF […]

Lossless Methods: Compression of Streams and Fonts

October 22, 2019

Here are the links for the two previous articles of the series: 1. Introduction to the Optimization of Existing PDF files: Methods 2. Lossless Methods: Optimization of Document Content A PDF document is composed of various data structures, described as different objects. In the scope of optimization, one is particularly important: the stream object. This […]

Lossless Methods: Optimization of Document Content

October 17, 2019

The first article of our PDF Optimization In-depth Series is available here. The PDF format is interactive.  During the release cycle of a PDF document, different people will use tools such as forms, annotations, attachments, and more. Archived PDF documents generally do not have the same use as those in circulation in a collaborative context. […]

Introduction to the Optimization of Existing PDF files: Methods

October 10, 2019

This paper was originally a presentation in French delivered at the PDF Day – France by Loïc Carrère, CEO of ORPALIS, in April 2019. Organized by the PDF Association, the PDF days are the meeting place of the PDF industry, where experts conduct educational (non-commercial) presentations, panel, and discussion-based sessions about the format. The richness […]

ZUGFeRD, Factur-X, and GdPicture.NET

October 1, 2019

ZUGFeRD and Factur-X – do you know these words? They both represent standardized e-invoices formats used widely on the European market, especially in Germany and German-speaking countries for ZUGFeRD, and Germany and France for Factur-X.  If you are wondering, like one of our users: “ I have an invoice as a PDF document and an […]

PDF 2.0 Support in GdPicture.NET

August 14, 2019

Hi everyone, It’s been some time since the ISO (International Organization for Standards) has released PDF 2.0 (ISO 32000-2:2017), a long-awaited update of the standardized version of the PDF format, PDF 1.7 (ISO 32000-1:2008). The “next generation of PDF” introduces a wide range of much-awaited features based on the collaborative work of the ISO technical […]