Bitmap images (Edexcel GCSE Computer Science): Flashcards

Digital images stored using binary code

Sequences of 1s and 0s

Tiny coloured dots that make up bitmap images

Picture elements

$W \times H$

How many colours each pixel can display

2 colours

256 colours

16,777,216 colours

$2^{\text{number of bits}}$

Pixels per inch

Individual pixels visible when image enlarged

$W \times H \times D$

Divide by 8

Divide by 1024