![]() ![]() A computational introduction to digital image processing (2nd ed.). In general, vector images require less memory to store necessary data compared to raster images. A vector image can be converted into a bitmap image of the required resolution, but it is rather difficult to convert the bitmap image into a vector without loss of quality. It is noteworthy that vector graphics can be easily transferred to raster format. Thus, vector images are based on geometrical formulas, while raster pictures have pattern dots. The Adobe Illustrator and CorelDraw programs are more appropriate for working with vector images. As such, vector graphics don’t use DPI or PPI because those values change based on the image’s dimension. Each point in a vector graphic corresponds to a master x-y axis that keeps everything in order, so a fresh image is generated at each new size. Although Adobe Photoshop allows working with vector images, it is still a raster editor. While raster graphics store image data as pixels, vectors store it as equations. For example, various logos, business cards, and banners for websites need vector images in terms of design. ![]() Vector images are especially useful when there is a need to increase a photo or any other picture without losing its quality. In other words, a vector image includes information in the form of formulas and mathematical calculations, having a small size regardless of the actual scale of the depicted canvas (McAndrew, 2015). A vector image contains information about the positions of points as well as data about the line passing through the reference points. Vector images do not consist of dots containing color information, but reference points and vector lines connecting them. As a result, the image is distorted, and its small details become illegible. To reduce the raster pattern, one has to transform several neighboring points into one or throw away extra points. To enlarge an image, it is necessary to increase the size of the squares, and then it becomes stepped. According to McAndrew (2015), the mentioned images are also difficult to scale and even harder to edit. The computer remembers the colors of all the squares in a row in a certain order, which explains why bitmaps require more memory to store information. A raster image, unlike a vector image, is capable of transmitting a realistic image with a lot of small details. For example, any digital photo consists of these multicolored dots. ![]() Looking at the screen with thousands of dots of different colors and shades, people identify objects and images composed from them (McAndrew, 2015). The more points on the plane and the smaller they are, the more one sees the image. In bitmap images, each square called raster has its color and brightness, composing a mosaic. ![]()
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