Graphics Applications

Pixel - Oriented Graphics Program
It's the set of dots as large as the screen or resolution. As you draw a picture on the screen, the computer keeps track of the colors of each dot. Provides us with electronic canvas. Paint programs enable users to create a drawing and then color it. Whatever you draw on the screen becomes part of the whole drawing. Because the canvas is a bit map, you must erase or draw over any part with which you are dissatisfied. A typical paint program is Paintbrush, which is distributed with Microsoft's Windows. The typical items in a paint program are the drawing area, graphics cursor, main menu, tool box, line size box, and color palette.
Vector or Object - Oriented Graphics Program
Enables the user to create two and three dimensional images that can be manipulated in many ways within the overall image. Because draw software relies on vector graphics, a specific object can be dealt with independently. Computer-aided design (CAD) (vector oriented) - lets a designer draw a wire frame model that can be rotated to show different views and filled to create a three dimensional solid model. Specialized CAD packages are available to help architects with the design of buildings.
Presentation - (mixed) Oriented Graphics Program
Enables users to create a wide variety of visually appealing and informative presentation graphics. Presentation graphics software makes it easy to prepare charts, graphs, and bulletted lists that summarize the presentation goals, persuasive points and conclusions. To let presenters focus on their message, rather than on the technology, many presentation graphics packages include professionally designed templates, such as maps, clip art, drawing tools. A typical presentation software is Power Point. Compression
There are two types of compression -- lossy and lossless. Lossy compression is when you compress an image, but you can't get the entire original back when it's decompressed. Thus, some of the image is lost. This would be done for pictures and graphics. Two major techniques are: JPEG - designed for still pictures
MPEG - used for motion pictures. Two types of lossy compression are symmetric and asymmetric. Symmetric take the same amount of time to encode as it takes to decode. Asymmetric takes longer either to encode or to decode.
The other type of compression is lossless compression in which you get back the original when the information is decompressed. There are several techniques that can accomplish lossless compression. Two major techniques are RLE (run length encoding) and Huffman Encoding.