Raster and vector graphics

Raster and vector graphics

Vector graphics

Vector graphics is a collection of mathematical curves and surfaces. Unlike raster graphics, in vector is not taken into account the individual pixels, but images, created from the basic geometric shapes and graphics commands. Vector graphics is, figuratively speaking, several fixed points and curves between the two points.

Vector device used, rather, before the era of computer graphics. The reason was quite simple. For storing graphics information, devices using less system resources, than when storing raster graphics. vector type device displays graphics as, as if they were painted on paper handle.

Compared with the pixel (raster) graphics, vector graphics offers more advantages - you can freely zoom in and out, without loss of quality.

The use of vector graphics. There are many ways to use vector graphics, despite the fact, that nowadays most commonly used raster graphics. It can be used, eg, for all printing methods, creating artwork or logo.

Programs for work with vector graphics: Inkscape, Zoner Callisto 5, CorelDRAW, Adobe Illustrator and other.

 

Raster graphics

Compared with vector graphics, Raster graphics consists of individual points (pixels), which is patterned. All points of the image creates the content of the image.

Raster device came into use later, in particular, because of their demands for memory. Raster display work in the same way, as well as TV.

Bitmap images can not be arbitrarily increased or decreased without loss of quality, in the case of vector graphics.

Program for working with raster graphics: Adobe Photoshop, GIMP.

Common formats for raster graphics:

 

  • TIFF (Tagged Image File Format) - One of the most important formats for exchanging data with the print preparing.
  • JPEG image format (Joint Photographic Experts Group) - On the internet is the most common graphic format for photos.
  • GIF (Graphics Interchange Format) - A graphical format, which allows lossless well compress images with a smaller range of colors (256 different colors).
  • PNG (ortable Network Graphics) - It has been developed as a replacement for the older GIF format.

More about vector and bitmap formats page http://matrixblog.ru/vektornye-i-rastrovye-formaty/.

 

Raster graphics creates images based on points, which are arranged in a grid. These dots are called pixels, squares are, are stored in rows and columns of the table, and create the final image.

Vector graphics creates images based on various geometric shapes, such as a segment, point, curve or polygon. Each of these figures can be expressed mathematically by the equation.

 
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