Compression

Question 1

Lossy

Answer 1

• Removes non essential information
• Smaller files
• Loss of quality

Question 2

Lossless

Answer 2

Records patterns rather than actual data

• Preserves all info
• Processing overhead on reading

Question 3

Run Length encoding

Answer 3

• Runs of identical pixels replaced with pixel value and number of consecutive identical pixels

Question 4

Dictionary based compression

Answer 4

• Dictionary is made with key : value pairs

i. e. abbreviations