User talk:AR Wickramasinghe

Graphic Design
Graphic Design Contents
 * Graphic Design Introduce
 * Vector & Raster Graphics
 * Graphics Formats
 * Photoshop
 * Corel Draw

Graphic Design
Graphic design as “the art or profession of visual communication that combines images, words, and ideas to convey information to an audience.” A graphic designer is responsible for arranging and using elements on different types of media (such as a poster, a package or a website), most likely with the use of a graphics software program such as Adobe Illustrator, Corel Draw & Photoshop.

Vector & Raster Graphics

 * Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon(s), which are all based on mathematical expressions, to represent images in computer graphics. "Vector", in this context, implies more than a straight line.


 * Vector graphics is based on images made up of vectors (also called paths, or strokes) which lead through locations called control points. Each of these points has a definite position on the x and y axes of the work plan. Each point, as well, is a variety of database, including the location of the point in the work space and the direction of the vector (which is what defines the direction of the track). Each track can be assigned a color, a shape, a thickness and also a fill. This does not affect the size of the files in a substantial way because all information resides in the structure; it describes how to draw the vector.


 * A bitmap corresponds bit-for-bit with an image displayed on a screen, generally in the same format used for storage in the display's video memory, or maybe as a device-independent bitmap. A bitmap is technically characterized by the width and height of the image in pixels and by the number of bits per pixel (a color depth, which determines the number of colors it can represent).�

GRAPHIC FORMATS
1.Use BMP to print graphics such as logos or icons. With BMP, file quality can be maintained when file is resized, and it loads quickly since it is not compressed. But, it cannot be used on the Web and it has a large file size.

2.Use TIF for scanned images and photographs. TIF images can be very high resolution and can be used by most scanning and graphics programs. However, it also has large file size, but it supports various lossless compression schemes (image isn’t degraded when file is compressed), so they can be smaller than a corresponding BMP image without a loss of quality.

3.Use GIF for line drawings and pictures, drawings with large areas of solid color and animations. GIF format has small file size, can be used on any browser, can be animated, transparent, or regular, has lossless compression (image doesn’t degrade when file size is reduced). Unfortunately, it can contain only 256 colors or fewer and is 8-bit only. Never send a gif to a printer or a design agency for artwork that is designed to be printed. The end result will look terrible and the designer will not thank you for it.

4.Use JPG for photographic images and images with subtle color gradations. JPG's contain millions of colors (24-bit palette). On the other hand, they use a lossy compression scheme -- when files are reduced in size, image is degraded because of a LOSS of information -- and may take longer to load because of decompression time.

5.Use PNG for any type of Web graphic except animations. This image type can be 8-bit, 24-bit or 32-bit, has lossless compression, is endorsed by the World Wide Web Consortium (W3C), can store alpha channel (variable) transparency, supports gamma correction (cross-platform control of image brightness), and supports two-dimensional interlacing (a method of progressive display). The drawback is that it is not supported by older browsers.

6.Use .eps (photoshop or illustrator) for logos or graphics you wish to import into programmes such as InDesign. These preserve vectors and are less likely to cause print issues. However, .png sequences can be exported from many applications such as Maya or 3D Studio Max and are excellent for use in film and animations when used in software such as Adobe Premiere or After Effects.