The Portable Document Format (PDF) is the worldâs leading language for describing the printed page, and the first one equally suitable for paper and online use. In this chapter, we take a tour of its uses, features, and history. The file types. PNG is also a lossless storage format. However, in contrast with common TIFF usage, it looks for patterns in the image that it can use to compress file size. The compression is exactly reversible, so the image is recovered exactly. GIF creates a table of up to 256 colors from a pool of 16 million. Sap frontend download. Jan 15, 2013 At IDR Solutions we have being developing a range of PDF software since 1999. We have a Java PDF Viewer and SDK, an Acrobat forms to HTML5 converter, a PDF to HTML5 converter and a Java ImageIO replacement). This has given us a lot of experience with the PDF file format and we have tried to share this knowledge on our blog.
We all download images or make memes to share them on the social media casually or for professional work. But because turning everything into PDF solves quality issues, we donât seem to need to look into the image file formats. But whatâs the harm in knowing which image file formats are best suited for which purpose? This post discusses the following image file formats and tells you which image format is suited for which occasions:
PNG vs JPG vs GIF vs BMP vs TIF
We all have heard about most of these file formats, and many of us know exactly when to use which, but many others donât. So, here is a quick tutorial.
Raster vs. Vector
Before we go into the five file formats picked, it is good to know that there are two main graphic families, Raster and Vector, and all the image file formats listed below belong to the Raster family. The Raster graphics are made of pixels while Vector graphics are made of paths. Also, when you are talking about BITMAP, you mean Raster.
Lossy vs Lossless compression
Again, image file formats can be distinguished based on the compression effects:
Uncompressed file format takes the most amount of data and is the exact representations of the image.
JPG/JPEG/JFIF images
Full form: Joint Photographic Experts Group.
Extension: .jpg/.jpeg
The commonest image file format that digital cameras save their images in. JPEG files apply the lossy compression method which can help reduce the file size significantly without compromising the quality. This is the default format for Microsoft Paint files.
Cons: This format is not immune to generational degradation. This means with every edit and resave; the image quality will deteriorate.
Application: Still images, image capture device storage, light, and darkness focused images.
PNG image format
Full form: Portable Network Graphics
Extension: .png
This free open-source alternative to GIF offers 16 million colors. This is the best file format for true-color images that need perfect tone balance. The animated file format of PNG is available with the APNG format. These files have a transparent background.
Cons: Works best with larger file sizes. The PNG format itself doesnât support animated graphics.
Application: Image editing, web images, images involving layers, like transparency or fading effects. It creates web friendly images.
TIF file extension
Full form: Tagged Image File Format.
Extension: .tif/.tiff
Flexible and easily extensible file format capable of handling device specific color spaces. These files have a transparent background. They are perfect for company logos.
Cons: Not ideal for web browsers.
Application: Photographic file standard in print. OCR software packages.
GIF file format
Full form: Graphics Interchange Format
Extension: .gif
Though this one has low compression ratio than most video formats, it is the most common image animation format.
Cons: Limited to the 8-bit palette (256 colors), not suitable for photographic images or dithering.
Application: Graphics that require few colors, example simplistic diagrams, logos, and animations that have large portions of a single color.
BMP image file format
Full form: Stands for Bitmap
Extension: .bmp
These large uncompressed files are associated with graphic files inside the Windows OS.
Cons: This format is lossless, meaning it cannot be compressed.
Application: Their simplistic structure makes them ideal for Windows programs.
These are the commonest image file formats we use. Now that you know which one is ideal for what purpose, you will be able to manage your image files better.
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Youcan validate PDF content against PDF/X, PDF/A, PDF/VT or PDF/E criteria.You can also save a copy of the PDF as PDF/X, PDF/A, or PDF/E, providedit complies with the specified requirements. For example, undercertain circumstances, an ICC profile that describes the destinationdevice is required for PDF/X-1a, PDF/X-3, and PDF/X-4 compliance.If your document doesnât have an embedded ICC output profile, youcan embed one before saving.
What is microsoft visual c. You can convert a PDF to a standards-compliantPDF using the Standards wizard. This wizard explains the intentsof specific formats as it guides you through the process. If youare familiar with the standards, you can use a built-in profile,or a profile created via the wizard, to convert a PDF.
Note:
Youcan also create PDF/X-, and PDF/A-compliant files using AcrobatDistiller.
![]() Convert to PDF/X, PDF/A, or PDF/Eusing a profile
If the conversion succeeds, a green check mark appearsin the Preflight dialog box. If the conversion fails, a red X appearsin the Preflight dialog box.
Verify a PDF against PDF/X, PDF/A,PDF/VT, or PDF/E criteriaPdf File Format Example
PDF/X, PDF/A, PDF/VT, and PDF/E files can be created in various ways, such as by using Acrobat Distiller or the File > Save AsOther command. If you open a PDF that conforms to one of these standards, you can view the standards information in the Navigation pane. (Choose View > Show/Hide > Navigation Panes, and then click the Standards.) The Standards menu and panel are available only if the PDF conforms to a standard. The Standards panel is present in all versions (Acrobat Professional, Standard, and even Reader). However, Verify Conformation functionality is only present in Acrobat.
The Conformance information indicates the standard used to create the file, the ISO name, and whether the file has been verified as PDF/X-, PDF/A-, PDF/VT-, PDF/UA-, or PDF/E-compliant. The Output Intent information indicates the color settings associated with the file. To verify the standards conformance for the file, click Verify Conformance.
You can remove all PDF/X-,PDF/A-, or PDF/E-specific information, such as the output conditionor the GTS_PDFX version key. This action is useful if a file has beenmodified, if you want to start over, or if an ICC profile increasesthe file size too much.
If the operation is successful, a green check mark appears in the Results tab of the Preflight dialog box. If the operation fails, a red X appears in the Results tab of the Preflight dialog box.
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