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Graphic Design Reference


.gif: Graphic Interchange Format - A format for image files.

.jpg: A standard for the compression of images, acronym for Joint Photographic Experts Group, the creators of the application.

Animation: The creation of a series of graphic images or frames so that they have the look of moving continuously.

Beveled: In graphic design, it is the practice of shading around the edges of an image in order to give the impression that the image is coming off from the page and give a 3D effect.

Bitmap: An image that is composed of rows of small dots. An example of a bitmap is .GIF, whish is a more effective format of for the internet than .BMP.
The Bitmap file format is used for bitmap graphics on the Windows platform only. Unlike other file formats, which store image data from top to bottom and pixels in red/green/blue order, the BMP format stores image data from bottom to top and pixels in blue/green/red order. This means that if memory is tight, BMP graphics will sometimes appear drawn from bottom to top. Compression of BMP files is not supported, so they are usually very large. When saving a file to the BMP format, add the ".bmp " file extension to the end of its file name.

BMP: The accronym for bitmap.

Browser Safe Colors: Computers use 256 colors to display images, however, only 216 of these colors are the same, these are the so-called browser-safe colors or web-safe colors.
 

EPS: The Encapsulated PostScript file format is a metafile format; it can be used for vector images or bitmap images. The EPS file format can be used on a variety of platforms, including Macintosh and Windows. When you place an EPS image into a document, you can scale it up or down without information loss. This format contains PostScript information and should be used when printing to a PostScript output device. The PostScript language, which was developed by Adobe, is the industry standard for desktop publishing software and hardware. EPS files can be graphics or images of whole pages that include text, font, graphic, and page layout information. When saving a file in the EPS format, add the ".eps" file extension to the end of its file name.

GIF:  The Graphics Interchange Format was originally developed by CompuServe in 1987. It is one of the most popular file formats for Web graphics and for exchanging graphics files between computers. It is most commonly used for bitmap images composed of line drawings or blocks of a few distinct colors. The GIF format supports 8 bits of color information or less. In addition, the GIF89a file format supports transparency, allowing you to make a color in your image transparent. (Please note: CompuServe GIF(87) does not support transparency.) This feature makes GIF a particularly popular format for Web images. When saving an image to the GIF format, add the ".gif" file extension to the end of its file name.


JPEG: Joint Photograhic Experts Group - A common image format. Most of the images you see embedded into Web pages are GIFs, but sometimes, especially in art or photographic Web sites, you can click on the image to bring up a higher resolution (larger) JPEG version of the same image.
Like GIF, the Joint Photographic Experts Group format is one of the most popular formats for Web graphics. It supports 24 bits of color information, and is most commonly used for photographs and similar continuous-tone bitmap images. The JPEG file format stores all of the color information in an RGB image, then reduces the file size by compressing it, or saving only the color information that is essential to the image. Most imaging applications and plug-ins let you determine the amount of compression used when saving a graphic in the JPEG format. Unlike GIF, JPEG does not support transparency. When saving a file in the JPEG format, add the ".jpg" file extension to the end of its file name.

PDF: Portable Document Format - A format for creating files so viewable or to be printed using a viewer program and will appear the same on any computer. Developed by Adobe, and viewer available free from Adobe.

PICT: The Picture file format is for use primarily on the Macintosh platform; it is the default format for Macintosh image files. The PICT format is most commonly used for bitmap images, but can be used for vector images as well. Avoid using PICT images for print publishing. The PICT format is "lossless," meaning it does not remove information from the original image during the file format conversion process. Because the PICT format supports only limited compression on Macintoshes with QuickTime installed, PICT files are usually large. When saving an image as a PICT, add the file extension ".pct" to the end of its file name. Use the PICT format for images used in video editing, animation, desktop computer presentations, and multimedia authoring.

PNG: Portable Network Graphic - An extensible image file format that is lossless, portable, and highly efficient. It will more than likely replace .GIF since it has better compression efficiency with indexed-color, greyscale and truecolor images and an optional alpha channel.
The Portable Network Graphics format will likely be the successor to the GIF file format. PNG is not yet widely supported by most Web browsers; Netscape versions 4.04 and later and Internet Explorer version 4.0b1 and later currently support this file format. However, PNG is expected to become a mainstream format for Web images and could replace GIF entirely. It is platform independent and should be used for single images only (not animation). Compared with GIF, PNG offers greater color support and better compression, gamma correction for brightness control across platforms, better support for transparency, and a better method for displaying progressive images. When saving an image to the PNG format, add the file extension ".png" to the end of its file name.

Portable Network Graphic: - .PNG - An extensible image file format that is lossless, portable, and highly efficient. It will more than likely replace .GIF since it has better compression efficiency with indexed-color, greyscale and truecolor images and an optional alpha channel.

TIFF: Tagged Image File Format - A format of graphics developed between Aldus & Microsoft and supported by Mosaic.
The Tag Interchange File Format is a tag-based format that was developed and maintained by Aldus (now Adobe). TIF, which used for bitmap images, is compatible with a wide range of software applications and can be used across platforms such as Macintosh, Windows, and UNIX. The TIFF format is complex, so TIFF files are generally larger than GIF or JPEG files. TIFF supports lossless LZW (Lempel-Ziv Welch) compression; however, compressed TIFFs take longer to open. (For more information about lossless compression, see the description of the PICT format above.) When saving a file to the TIFF format, add the file extension ".tif" to the end of its file name.

 

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