Understand what a pixel is and be able to describe how pixels relate to an image and the way images are displayed. "Describe the following for bitmaps: size in pixels, colour depth.
Know that the size of a bitmap image in pixels (width x height) is known as the image resolution."
Describe how a bitmap represents an image using pixels and colour depth.
Describe using examples how the number of pixels and colour depth can affect the file size of a bitmap image.
Calculate bitmap image file sizes based on the number of pixels and colour depth.
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Q 1/12
Score 0
What are images made up of?
30
Waves
Binary
Pixels
Pictures
Q 2/12
Score 0
What is a pixel?
30
A collection of colours in a graphic image
The name given to the colours used in images
A square in a graphic image with an assigned colour
A black or white image
12 questions
Q.
What are images made up of?
1
30 sec
3.3.6.a
Q.
What is a pixel?
2
30 sec
3.3.6.a
Q.
Why are pixels encoded into binary representations?
3
30 sec
3.3.6.a
Q.
What does image resolution refer to?
4
30 sec
3.3.6.a
Q.
What is the correct formula for calculating the file size of an image?
5
30 sec
3.3.6.a
Q.
What does the term colour depth mean?
6
30 sec
3.3.6.a
Q.
What is a bitmap?
7
30 sec
3.3.6.a
Q.
What does reducing the image resolution mean for the file size?
8
30 sec
3.3.6.a
Q.
Which of these is not an image file format
9
30 sec
3.3.6.a
Q.
Which of these file formats results in lossy compression?
10
30 sec
3.3.6.a
Q.
Why does saving a thumb nail from google, offer a lower quality image than the source file?
11
30 sec
3.3.6.a
Q.
How many colours can be represented in a colour depth of 8 bits?
