Resolution controls how many pixels make up the picture.
Circle one: True False
What is a pixel?
- A whole photo
- A tiny square
- A file type
What does colour depth control?
- Bits per pixel
- How wide the screen is
- How fast the picture prints
The colour depth doubles from 8 to 16 bits. What happens to the file?
- It stays the same
- It halves
- It doubles
A 100 by 100 image uses 8-bit colour. How many bits does it take?
Answer: ______________
What happens when a picture is blown up past its resolution?
- Blurry or blocky
- It gains true detail
- Its file shrinks
A 16 by 16 icon in two colours is stored plainly, one bit per pixel. How many bits?
A 50 by 50 icon uses 8-bit colour. How many bits does it take?
Answer: ______________
Pictures made of tiny squares W1-mt_-Tr40QK8sN-s1
- True · More pixels means higher resolution and a sharper picture.
- A tiny square · Pictures are grids, and each grid square is one pixel.
- Bits per pixel · Depth sets the bits per pixel, which sets the colour count.
- It doubles · Every pixel carries twice the bits, so the total doubles.
- 80000 · 100 times 100 pixels times 8 bits each is 80,000 bits.
- Blurry or blocky · Each pixel must cover more space, and guessed colours look rough.
- 256 · 16 times 16 pixels times 1 bit each is 256 bits.
- 20000 · 50 times 50 pixels times 8 bits each is 20,000 bits.