Compression

Learning Objectives

To be able to:

Differentiate between lossy and lossless compression
Explain the advantages and disadvantages of each

Lossless vs Lossy

Lossless compression is a way of saving an image, so that you are saving space on your device, but you are also keeping a sharp clarity in the image.

Lossy compression will remove parts of data to save extra space, but when you open the image again, you lose some of the sharpness.

Lossless vs Lossy

What can be compressed?

Images

Sound

Video

Text

Documents

All files can be compressed, but what would happen if you used lossy compression on text?

In he gr n spec rum of echnologic l v ncemen s, he inven ion of he compu er s n s s es men o hum n ingenui y n innov ion. his m gnificen ool h s revolu ionise in us ries, cul ures n lives roun he worl .

In the grand spectrum of technological advancements, the invention of the computer stands as a testament to human ingenuity and innovation. This magnificent tool has revolutionised industries, cultures and lives around the world.

Before

After

File Types and their compression

.jpg

.ecw

.wav

.mp3

.png

.zip

.raw

Lossy

Lossless