Image in Pixels and Binary (AQA GCSE Computer Science): Flashcards

Picture element

Pixels

1

0

$\text{width} \times \text{height}$

Resolution

Better quality but larger file size

How many different colours each pixel can represent

$2^1 = 2$ colours

$2^2 = 4$ colours

$2^8 = 256$ colours

$2^{24} =$ over 16 million colours

$\text{width} \times \text{height} \times \text{bits per pixel}$

Divide by 8

Image dimensions ($\text{width} \times \text{height}$) and colour depth