6e Vector and Bitmap Graphics ***

Question 0

Some of the images used in the presentation are vector graphics.
Evaluate the suitability of using vector graphics in the airline’s presentations.(4 marks)

Answer 0

Any 4
3 from:
Image can be enlarged without loss of quality (1) moving from small to large presentation does not require new images (1)
Size of the image is small (1) making it easier to transfer between devices / load (1)
Vectors based on lines (1) so more use when drawing maps (1) Lack of detail in images (1) cannot display photographs (1)
1 for evaluation of suitability.

Question 1

The company uses bitmap graphics for the photographs on its website.
Describe two characteristics of bitmap graphics (4 marks)

Answer 1

2 from, with expansion:
Made up of pixels (1) each pixel can be a different colour/pixel is a square of colour (1)
Blurs/pixelates (1) when you zoom in/enlarge (1)
Takes up a lot of memory (1) each pixel stored individually (1) Can be compressed (1) into smaller file size (1)
Created by camera/scanner (1) in RAW or compressed format (1)

Question 2

The company is creating a website advertising its move to new premises. The website will contain bitmap images.
(a) Identify two features of a bitmap image that make it suitable for use on a website.(2 marks)

Answer 2

2 from:
Standardisation/uniform acceptance (1)
Low memory processing to display (1)

Question 3

Identify two differences between vector and bitmap graphics.(2 marks)

Answer 3

One mark for each difference, 2 from:
Vector does not pixelate on enlargement/bitmap pixelates on enlargement (1)
Vector takes up less file space/Bitmap takes up more file space (1)
Vector requires a lot of processing/bitmap requires low processing (1)
Vector cannot be compressed/bitmap can be compressed (1)
Vector is lines (1) [2] Bitmap is squares of colour/pixels (1).

Question 4

The company could use vector or bitmap images in the presentation.
Describe three differences between vector and bitmap images (6 marks)

Answer 4

3 from, 2 marks each e.g: 6 Bitmap made of pixels (1) vector made of geometric information
(1)
Bitmap takes up large amounts of memory (1) vector files are
small in size (1)
Bitmap uses low processing to display (1) vector uses high processing (1)
Bitmap cannot be enlarged without pixelation (1) vector can be enlarged with no distortion (1)