In Computing, JPEG (Pronounced Jay-Peg) Is a Most Commonly Used Standard Method of Lossy

Intro To Photoshop

Adobe Photoshop is a graphics editor (with some text and vector graphics capabilities) developed and published by Adobe Systems. It is the market leader for commercial image manipulation, and probably the most well-known piece of software produced by Adobe Systems. It is usually referred to simply as "Photoshop". Photoshop is currently available for Mac OS and Microsoft Windows; versions up to Photoshop CS 3.

The most common file formats in Photoshop are:

JPEG (mostly used for web based images)

TIFF (mostly used for print images)

EPS (mostly used for print images)

JPEG

In computing, JPEG (pronounced jay-peg) is a most commonly used standard method of lossy compression for photographic images. The file format which employs this compression is commonly also called JPEG; the most common file extensions for this format are .jpeg, .jfif, .jpg, .JPG, or .JPE although .jpg is the most common on all platforms.

The name stands for Joint Photographic Experts Group. JPEG itself specifies only how an image is transformed into a stream of bytes, but not how those bytes are encapsulated in any particular storage medium. A further standard, created by the Independent JPEG Group, called JFIF (JPEG File Interchange Format) specifies how to produce a file suitable for computer storage and transmission (such as over the Internet) from a JPEG stream. In common usage, when one speaks of a "JPEG file" one generally means a JFIF file, or sometimes an Exif JPEG file.

JPEG/JFIF is the format most used for storing and transmitting photographs on the World Wide Web. It is not as well suited for line drawings and other textual or iconic graphics because its compression method performs badly on these types of images.

TIFF

Tagged Image File Format (abbreviated TIFF) is a file format for mainly storing images, including photographs and line art. Originally created by the company Aldus for use with PostScript printing, TIFF is a popular format for high color depth images, along with JPEG and PNG. TIFF format is widely supported by image-manipulation applications such as Photoshop by Adobe, GIMP, and Paint Shop Pro by Jasc, by desktop publishing and page layout applications, such as QuarkXPress and Adobe InDesign, and by scanning, faxing, word processing, optical character recognition, and other applications. Adobe Systems, which acquired the PageMaker publishing program from Aldus, now controls the TIFF specification.

EPS

Encapsulated PostScript, or EPS, is a graphics file format. An EPS file is a PostScript file which satisfies additional restrictions. These restrictions are intended to make it easier for software to embed an EPS file within another PostScript document.

Like the TIFF file, but uses up more space ie: RAM.

* How to change a file format: File > Save > Select Format

Upcoming Preview: Image Resoloution

* Print/Press ready files must be set at 300 dpi – RBG or CMYK colour

* Web ready files must be set at 72 dpi – RGB colour