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Pipeline processing involves a string of data processed in a chain reaction. This means the output of the first data point processing is the input of the next processing point. Vector processing involves a CPU and only one-dimensional arrays of data. This is similar to how a basic computer functions.
Raster.
raster
Main difference is that you can enlarge vector graphics without lose of quality. Vector graphics can be scaled and changed at any time without any lose of quality or appearance while raster images can lose sharpness and quality when you scale or change them.
Raster graphics are stored as pixels, vector graphics are stored as geometric primitives. Images of the latter type can, in principle, be scaled infinitely, and pixelization will not occur.
Photoshop is a raster/pixel-based program, and is also a product you have to purchase. Inkscape is a vector drawing program that's free.
Illustrator is a vector based program that can export raster images.
raster image = monitor, laser printer or ink-jet printer vector image = graphics plotter
There is always a confusion among the newbies about the difference between Image Processing and Computer Graphics. Unless specifically mentioned , Computer Graphics is all about Synthesizing a new image from Geometry , Lighting parameters , Materials and Textures . The Emphasis is on Digital Image Synthesis. Image Processing is the process of manipulating an image acquired through some device . The image too often will be acquired from photographs,scanners , medical equipments. The emphasis is on Analysis and Enhancement of the image. Computer Vision is an area where Image Analysis is used a lot. Raster Operations dominate in the case of image processing. In the case of Computer Graphics , you will mix vector and raster operations to generate the final image.
Raster and Vector
Raster images are made up of pixels, Vector images are made up of paths. Raster images (sometimes called bitmap images) are made up of a grid of pixels, each of which can be a different colour.Vector images, on the other hand, rely upon mathematical relationships between points in order to make up paths, which when all combined, make up a full image.Bitmaps are better for photographs or images with complex shading. Vectors are better typefaces and illustrations. Vectors also scale much better than bitmaps.
Vector does not lose quality when resized, which is ideal for logos.