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 secVoice-over is AI-generated; the script is written and checked by Kajal Ma'am. Confirm anything you plan around against your official board document. We never ask for a password or an OTP.