In this article we will talk about : Types of computer graphics , raster and vector graphics , bitmap and vector images .
To begin with, that all the images are divided into: bitmap and vector.
In the terminology of bitmaps called the array of pixels – which consists of identical size and shape of plane geometric figures arranged in the nodes of a regular (all cells have the same size) of the grid. Computer is perceived as an array of information about the color of all pixels ordered in a certain way, such as an image on the TV. Raster image can be likened to a mosaic, it also consists of separate elements, but since they are very small, difficult to see them.
A vector image is a set of more complex and diverse geometric objects (circles, ellipses, rectangles, polygons, line segments and arcs of curves). An important feature of vector graphics is that for each object (class of geometric objects) are defined by control parameters (color, size), specifying its appearance. The computer is a vector image as a list of all the objects that make up the image.
Find the example of a vector image in life is not easy. But imagine the picture painted by many geometric shapes. In the school program vector images is, graphs of functions.
The output raster image on a screen or paper as opposed to simple vector images. Devices that output vector images known as plotters. The process of converting vector images into pixel image is called rendering. Rendering – the merger of screening layers without storing the result in the file.