Some still hold the opinion that graphics and art is a mind thing and one cannot become a graphics artist just by tweaking some shots in a computer. Creativity may still be elusive but there is little doubt that computer generated imagery and graphics have taken art to a new level. With the availability of new and better graphics tools an artist has more time to do things which he does best ......creating . It used to be domain of Mac's, high end graphics workstations with the whiz kids hunched on its big impressive screen. But soon a slew of PC based graphics suites hit the market, turning every kid into a master craftsman. Adobe Photoshop may be considered to be a pioneer in this field. Corel's Photopaint and Paint Shop Pro were and are being used widely even today. Windows based graphics software has made computer graphics accessible to the common man. With the advent of digital cameras, need for enhancing and improving family photos has lead to phenomenal growth of home grown studios. The pace has quickened with cameras mounted on mobile phones. The number of formats for graphics files has also increased with the times. Starting with the humble bit map file, bmp other popular formats are JPEG, TIFF, GIF and TARGA (.tga).
Adobe Photoshop
The field of computer graphics would not be complete without the mention of Adobe Photoshop. In fact, it can be considered as the Microsoft windows of the graphics world. The Photoshop tools make retouching, manipulation and color correction possible within a few minutes as compared to many days used by professional photographers using traditional tools. Photoshop uses its own native format .psd for storing files. The layer information can be preserved in this format, permitting the user to effect changes at a later date. However the native format .psd gives rise to large and heavy files which are rather difficult to transfer to other computers. Photoshop can also work with several other graphics file formats like BMP, JPEG, and Gif etc. It is also capable of importing vector graphics. In the latest version, it is also possible to work on several digital camera formats making it easy for home users to manipulate digital images.
Along with several other Adobe software, Photoshop can be used to create images not only for the print media but also for the internet, animation and motion pictures.
An important feature of Photoshop is the plug-ins. With plug-ins the capability of Photoshop is extended phenomenally. In fact, a sub culture or mini world has developed under the umbrella of plug-ins. Effects such as grain, lens flare, degauss etc. are quite popular. Color correction and manipulation is an important feature of Photoshop, lending magic to real world images.
Adobe Photoshop software is a pioneer in the field of computer graphics. It is moderately priced and is suitable for manipulating high resolution graphics. It can convert into a variety of graphics formats which are suited both for the print as well as web-sites.
Copyright (c) 2007 Dean Barnard
How To Computer Graphics
Graphic images on your computer come in two different forms, raster images and vector images. Raster images are made by programs such as Photoshop and Corel Photopaint. Vector images are produced by Adobe Illustrator, Freehand, and CorelDraw. While the results from these different programs can look similar, the ways in which they are made are very different.
Raster images are made up of millions of individual squares, or pixels, of various colors. The more pixels you have, the better the image will look. The number of pixels, or resolution, is usually expressed in dots per inch (dpi). Images on the Web are shown at 72 dpi. A high-resolution image would run 300 dpi or higher. Some types of printing can get into the 1600 dpi range. Much like a mosaic, a raster image can look smooth from a distance but as you zoom in closer you can see the individual pixels.
A vector image is drawn from mathematical formulas for lines and curves and is redrawn each time you zoom in for a closer look. The quality of the image stays the same regardless of the level of magnification. Vector files, since they are formulas instead of information on millions of individual pixels, tend to use less memory than raster files.
The edge of a circle, rendered as a raster image, may look smooth initially, but eventually as you zoom in you will see a jagged stairstep edge of the individual square pixels that make up the image. A lower resolution image will look jagged or pixellated much sooner than a high resolution image. A circle's edge in vector form will always be smooth no matter how close you zoom in since it is recalculated each time you change the view.
Raster based programs are best at working with photo-realistic images and make subtle (or bold) changes in color, shadow and texture. Vector based programs excel at easy control of edges and tend to produce a more graphic style of art. Regardless of the type of image, higher resolution is always better for producing a good result. While your image may be vector or raster, or even a combination of the two, the Art Staff at ExpertShirt.com will work hard to translate it into the best textile printing possible.
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