Bitmap vs Vector Graphics: Types, Tools, Advantages, Disadvantages and Comparison, Lecture notes of Technology

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Graphics

(Bitmap Vs Vector)

S1 Technology

Learning Intentions/Success

Criteria

• Learning Intentions • Success Criteria

Bitmap Graphics

• Bitmap graphics are made up of pixels of different colours.
• Pixels are small dots that make up a graphic.
• When you take a photograph using a digital camera or scan an image from a magazine, you are creating a bitmap graphic.

Bitmap Graphic Tools

(Paint)

Advantages/Disadvantages of

Bitmap Graphics

Advantages

• A bitmap graphic is composed of many tiny parts, called pixels , which are often many different colours.
• It is possible to edit each individual pixel.

Disadvantages

• Since the computer has to store information about every single pixel in the image, the file size of a bitmap graphic is often quite large.
• When you resize a bitmap graphic, it tends to lose quality.

Vector Graphics

• Made up of objects.
• It is possible to edit each object separately, for example, change the shape, colour, size and position.
• Even if an object is quite large, it doesn't need a lot of computer memory and therefore the file size is very small.
• You can resize object without losing quality.
• Used to create logos and graphic designs.

Activity 2

Complete Tasks 3-5.

Vector Graphics

(Advantages and Disadvantages)

Advantages

• Edit each object separately, for example, change the shape, colour, size and position.
• A large object will not require a lot of computer memory (small file size).
• When you resize images, they do not lose quality.

Disadvantages

• You cannot edit individual pixels.
• Lots of layered objects will require a lot of storage space.
• Graphics have a flat perspective and only suited to creating logos, cartoons, diagrams and simple illustrations.

Comparison of Bitmap and Vector

Graphics

Bitmap graphics Vector graphics

What are they made up of?

Pixels of different colours Objects

What can be edited?

Individual pixels Individual objects

Is the file size big or small?

Large, as the computer stores details of every pixel

Small, as the computer stores details of objects, which do not require much memory

What happens when they are resized?

They lose quality They do not lose quality

How real do they look?

Real Not real (many of them look like cartoon images)

Common file formats

.bmp, .dib, jpeg, gif, tiff, .png .cgm, .svg, .odg, .eps, .xml

Activity 4

Complete Tasks 7-9.