Raster points technique

A raster image is generally defined as an array of values known as pixels. Each pixel (picture element) is a small colored square. It is associated with one or more digits that define the color that it should display. In the simplest form of description of an image, each pixel is defined by three groups of eight bits (24 bits total), with values between 0 and 255, defining the amount of red, green and blue combine to obtain a certain color. The correct proportions of red, green and blue can be combined to form black, white, gray 254 and a wide variety of colors (16,777,216 total). Raster images are resolution dependent they are. This is expressed in dots per inch (dots per inch) or dpi. Resizing a raster image can be a deceiver. Decrease they generally do not raise problems. A reduction of pixel size which makes it often becomes more accurate picture. Image bitmap / raster is composed of a fixed number of pixels. Increasing its size leads to creating more of the same color pixels and consequently reduce image quality. Because of this they can appear jagged, losing the details when they are enlarged or printed at a resolution higher than that of FAP has.