Image Formats
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File Formats

Tif files are used for InDesign.

JPG files are used for pictures/photographs on web sites.

GIF files are used for clipart and line drawings for the web.

Png Portable network graphic.  (Note: Very versatale for use in PowerPoint, InDesign, web design, etc.)
For complete details and an example goto:  http://morris-photographics.com/photoshop/articles/png-format.html

bulletTagged Image File Format (.tif): TIF files are uncompressed, so they don't lose data information and color information.  The file size is larger.   This file format is best for use in newspapers, such as the Lancer Ledger, flyers, brochures and any other desktop publishing assignment.
bulletJoint Photographic Experts Group (.jpeg, .jpg): JPEG files are used to save photographs (millions of colors) and are used for web pages (also a good choice for powerpoint). The file size is smaller than that of a tif file. 
bulletGraphical Interchange Format (.gif): This is also used on the web in the form of clip art and line drawings.  It is not recommend to save photos in gif format.  Gifs are also the file format used in many animations and for transparent backgrounds.
bulletVector Graphics (Adobe Illustrator, CAD programs, Macromedia Freehand):  Drawing programs allow you to create vector graphics.  The images are made up of mathematical formulas that connect vectors or simple geometric shapes such as lines and arcs.  Vector graphics are smoother than bitmapped images.  Vector images can be resized without losing the quality of the image.  In Publications we convert clipart into a vector graphic in Adobe Illustrator.
bullet A note about Vector graphics (sometimes called vector shapes or vector objects) are made up of lines and curves defined by mathematical objects called vectors, which describe an image according to its geometric characteristics.
Example of a vector image at different levels of magnification

You can freely move or modify vector graphics without losing detail or clarity, because they are resolution-independent—they maintain crisp edges when resized, printed to a PostScript printer, saved in a PDF file, or imported into a vector-based graphics application. As a result, vector graphics are the best choice for artwork, such as logos, that will be used at various sizes and in various output media.

The vector objects you create using the drawing and shape tools in Adobe Creative Suite are examples of vector graphics. You can use the Copy and Paste commands to duplicate vector graphics between Creative Suite components.
Copyright Adobe Inc.

bulletPortable Document Format (.pdf): This is the format used for many documents that are displayed on the web.  Think of it as a picture of a document.  This is ideal so that you don't lose any of the formatting.  If you have the Adobe Acrobat program, you can make changes in a PDF file.  Otherwise, the free Adobe Acrobat Reader program is available free on the net.
bulletPng Portable network graphic.  (Note: Very versatale for use in PowerPoint, InDesign, web design, etc.)
For complete details and an example goto:  http://morris-photographics.com/photoshop/articles/png-format.html

        NOTE:  With Adobe Acrobat you can create forms that can be filled in on the Internet.  The areas that are filled in are actually fields that were created.

Resolution--is a measurement of the output quality of an image.

PPI-Pixels per inch Screen Resolution
DPI-Dots per inch Print resolution

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