| Aspect | Bitmap image |
|---|---|
| Storage | A grid of pixels, each with a colour value |
| Enlarging | Looks pixelated when enlarged, because each pixel gets bigger |
| File size | Larger with more pixels (resolution) or more bits per pixel (colour depth) |
| Best for | Photos and realistic images |
This key facts covers How a Bitmap Image Is Stored within Images & Sound for GCSE Computer Science. Revise Images & Sound in 3.3 Data Representation for GCSE Computer Science with 16 exam-style questions and 14 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 6 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Images & Sound
What does colour depth refer to in a digital image?
Explain the effect of increasing colour depth on a digital image. Refer to both file size and image quality in your answer.