1.2: MEMORY AND STORAGE 3.0

Question 1

ADVANTAGES of LOSSLESS compression: (3)

Answer 1

• file is compressed without the loss of data.
• No bits are lost after the image has been restored.
• crucial for files where missing data would result in a negative impact eg; missing text from source code

Question 2

DISADVANTAGES of LOSSLESS compression: (1)

Answer 2

-data is restored after file has been uncompressed therefore file size is not massively reduced (larger file size).​

Question 3

explain 3 ways that file size of an image can be reduced?

Answer 3

• reduce the number of bits per pixel, thereby reducing the overall amount of data per pixel
• reduce the dimensions/ physical size of the image thereby data about fewer pixels are stored
• use lossy compression: some data is removed and discarded, thereby reducing the overall size of the file