When working with two-dimensional graphics, it is very important to understand the basics of its structure and the principles by which it will change, in a word, to represent how the computer sees it. Of the two main types of images - vector and raster - each finds its application in a certain field, and also has its advantages.
The units that make up bitmap images are pixels. These are small monitor squares that carry and transmit color information. With their help, raster images are puzzled and perceived as a whole. The quality of the monitor display of such images depends on the number of pixels per inch. Basically, all modern computers are produced with a resolution of 72 or 96 pixels per inch (the value varies depending on the screen settings).
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The raster format is most suitable for those who use the creation of complex realistic shadows, as well as other three-dimensional effects and textures, when working with images. And, of course, photographers who process their photos in Photoshop are shown only a raster type of graphic image.