What is a raster image and vector images?

raster and vecto

All computer images are divided into two basic types: raster images (also known as a bitmap) and vector images. In some cases suggested the use of vector graphics, others, depending on the nature of the project it is advisable to use a bitmap image. 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 optimal use of them.

What is a raster image (bitmap)?

Raster images are created by a digital camera (picture), they are scanned or created on a PC in a different program such as Adobe Photoshop. Raster images consist of many pixels. Resolution raster images or scanned image is expressed in dots per inch or dpi. Scanner or printer resolution is also measured in dots per inch.

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

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

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

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

Whether vector images?

Vector is a synonym for the word line. Image of vector is a collection of lines connected and curves that make up the object. When a vector image made into a vector illustration program lines and curves that connect the dots. Each node, lines and curves defined graphically by the software uses a mathematical description.

vector elements have a huge advantage to not lose quality when enlarged or reduced. For this reason they are used mainly for print. Vector files have small size and can be easily transmitted via email.

A drawing program will allow users to click on the object and determines the color. Coloring vector images a lot easier than the bitmap.

With vector graphics as possible to create logos, illustrations, elements for your website or print and vector art (composition). Vector extensions are: CDR, AI, EPS, SVG.