KwickClips Computer Systems · 43 sec · free
How many colours do 8 bits give?
Short answer. 256.
What does more pixels give?
More detail.
Image terms
| Term | Means |
|---|---|
| Pixel | one dot |
| Resolution | width x height |
| Colour depth | bits per pixel |
Remember
| More pixels: more detail |
| 8 bits: 256 colours |
Zoom into a photo. What are those tiny squares? Three terms. A pixel is one dot. Resolution is pixels wide times high. Colour depth is bits for each pixel. Remember. More pixels, more detail. Eight bits give two fifty six colours.
This clip is from the full lesson: Representing Images and Sound, and Calculating File Size — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: Cambridge IGCSE Grade 9 Computer Science (0478), Cambridge IGCSE Grade 10 Computer Science (0478), Cambridge IGCSE Grade 10 Computer Science (0478), Edexcel GCSE GCSE Computer Science (1CP2)
More KwickClips from this lesson
What is sampling rate measured in?42 sec
What do you divide bits by to get bytes?40 sec
Name one reason file size matters.40 secDisclaimer. KwickAcademy is free study material for general learning and revision. Parts of it, including the voice-over, are produced with the help of AI tools and may contain errors; if you spot one, please tell us and we will correct it. Syllabus, marks and exam details follow the latest official board publications available to us, and boards can change them at any time, so always confirm against your board's official website and your school. Using this material does not guarantee any marks or result. Board names and trademarks belong to their owners; Kwickprep is not affiliated with or endorsed by any examination board. We never ask for passwords, OTPs or ID numbers. Your progress is saved only in this browser. Full disclaimer · Privacy