Comparison Between Raster and Vector

Often the question arises: what should be used raster of vector format? We hope the following comparison between the two systems gives you some common information about this question.

Raster - image formed as a sum of pixels. At present it is a dominating method of resulted presentation of graphic information (on raster displays and printers). Also it is used a close notion of bit map (bitmap) - raster saved on memory or disk. The raster image feature is in fact that size of uncompressed file and consequently the loading rate are independent of image complexity. The advantage of raster is a simple method and therefore rapid way of the image bit plane representation on the raster imaging devices or viewers. The limitation of this type of image is in fact that it can't be intentionally scaled because the decreasing of image size may lead to loss of some pixel rows, but increasing accompanied with enlargement of pixel sizes. Raster type of image is useful for pictorial graphics storage, at the same time quite effective shrinking algorithms have been developed for storage of raster data.

Vector - image formed with aid of separate lines, straight or curved. Quality of vector imaging is due to an accuracy output (it is demanded the devices supported vector imaging plotters or vector displays) and nomenclature of supported basic graphic primitives (lines, arches, curves, ellipses, etc.). The main advantage of vector graphic is a scaling convenience with possibility of working on the details of elements of different sizes on the one image. Besides, the advantage of vector graphic is in the fact that a form, spatial location and color of objects describe by mathematical formulas. It provides comparatively small sizes of image file and independence of resolution of print device or display. For representation of vector image it is usually demanded quite complicated software that understands and correctly carries out all nontrivial protocols of drawing commands saved in file of vector graphic format. At the same time the more complicate image is the larger size of respective file and the longer time the image drawing takes.

Vector image has a range of advantages over raster drawing. The main advantages are:
possibility of accurate creating and description of object; possibility of scaling and editing of object without loss the image quality.
Vectorisation - conversion from raster image to vector representation. In the most cases this operation involves loss of information about separate image elements which the program can't correctly describe (mainly quantity of curves is intentionally minimized). Respectively reverse operation is raterisation. Technically this operation is simpler than vectorisation, but we lose possibility of intentional scaling of created image.

Comparison Between Raster and Vector

Vector

Comparison Between Raster and Vector

Comparison Between Raster and Vector
Comparison Between Raster and Vector

Vector

Comparison Between Raster and Vector

Comparison Between Raster and Vector

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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)

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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)
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Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)

Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)

Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)

Somebody That I Used to Know - Walk off the Earth (Gotye - Cover)

Comparison Between Raster and Vector

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Comparison Between Raster and Vector

Comparison Between Raster and Vector
Comparison Between Raster and Vector

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Comparison Between Raster and Vector

Comparison Between Raster and Vector Specifications

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Comparison Between Raster and Vector

Comparison Between Raster and Vector

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Comparison Between Raster and Vector

Vector and Raster Graphics

All computer images are divided into two basic types: raster images (also known as the bitmap) and vector images. In some cases it is recommended the use of vector graphics, in others, depending on the nature of the project it's recommended to use bitmap images. Sometimes, the two formats can be used together. An understanding of the advantages and limitations of each technology and the relationship between them will lead to their optimal use.

Vector and Raster Graphics

Vector and Raster Graphics

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Vector and Raster Graphics

Vector and Raster Graphics

What is a raster image (bitmap)?

Raster images are created by digital cameras (pictures), are scanned or they are created on PC in different programs such as Adobe Photoshop. Raster images are composed from lots of pixels. The resolution of a raster image or a scanned image is expressed in terms of dots per inch or dpi. A scanner or printer resolution is also measured in dots per inch.

A raster image is complex in terms of applied effects, retouching, color variations, etc.

To accurately reproduce an raster image file the software must keep track of large quantities of information, including the exact location and color of each pixel of the combination of pixels. This results in huge file sizes for raster graphics. Higher resolutions (dpi) and higher color depth gives larger files.

When a raster image is created or scanned, the file size becomes a serious problem because large files tend to make your computer processor and hard drive to work overtime.

Raster files extensions are: BMP, GIF, JPEG, JPG, PNG, PICT (Macintosh), PCX, TIFF, PSD (Adobe Photoshop).

What is a vector image?

Vector is a synonym for the word line. The vector image is a collection of connected lines and curves that make up objects. When a vector image is created into a vector illustration program the lines and curves are connecting points. Each node, line and curve is defined graphically by the software using a mathematical description.

Vector elements have the great advantage to not lose quality when enlarged or reduced. For this reason they are used mostly for print. Vector files have small sizes and can be easily transmitted via email.

A drawing program will enable a user to click on an object and define its color. Coloring vector images is much easier than bitmaps.

With vector graphics it's possible to create logos, illustrations, elements for websites or print and vector art (composition). Vector extensions are: CDR, AI, EPS, SVG.

Vector and Raster Graphics