N5S3 - Data Rep - Graphics - Bitmap Flashcards
1
Q
What are bitmapped graphics?
A
A bitmapped graphic is a 2D array of pixels
2
Q
What is the resolution?
A
It is the total number of pixels in an image (usually measured in ppi or dpi)
3
Q
What is the bit depth?
A
It is the number of colours that can be used/stored in an image
4
Q
The more bits allocated to each pixel…
A
…the larger the file size
5
Q
What is the colour depth?
A
number of bits used to represent the colour of each pixel.
6
Q
Describe a high resolution image
A
- small pixels
- many pixels
- good quality
7
Q
Describe a low resolution image
A
- large pixels
- fewer pixels
- poor quality
8
Q
Give one advantage and disadvantage of bitmapped graphics
A
Advanatage - They can be manipulated at pixel level
Disadvantage - The image becomes jagged when scaled
