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WorksheetsKS4 - Representing Images
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Colour depth refers to:
a)
How many bits are used in a file to store colour information in every pixel
b)
Resolution divided by the number of colours in an image.
c)
Degree of file compression applied to an image file.
d)
Repeated resampling of an image.
2.
Most graphic formats create many colours from:
a)
Red, green, blue.
b)
Red, pink, yellow.
c)
Red, white, blue.
d)
Black, white, green.
3.
How many colours do we get from 2 bits
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
4.
How many colours do we get from 3 bits?
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
5.
The higher the resolution, the ____ the file size.
a)
Smaller
b)
Larger
6.
The higher the colour depth, the _________the image file size.
a)
Smaller
b)
Larger
7.
What is the calculation to work out how many bits a bitmap is?
a)
height * width * colour depth
b)
height / width * colour depth
c)
height - width + colour depth
d)
height * width / colour depth
8.
What is the calculation to work out how many bytes a bitmap is?
a)
height * width * colour depth / 8
b)
height / width * colour depth / 8
c)
height - width + colour depth / 8
d)
height * width / colour depth / 8
9.
A bitmap image is 20 pixels high and 5 pixels wide, with a colour depth of 2 bits. How many bits is this image?
a)
200 bits
b)
100 bits
c)
500 bits
d)
150 bits
10.
Bitmaps are made up of _______
a)
Shapes and lines
b)
Pixels
11.
Are Bitmaps the only type of Image?
a)
Yes
b)
No
12.
What Does Pixel Stand for?
a)
Image
b)
Plain Element
c)
Picture Element
d)
Picture/Images X-element Language
13.
Which 'bit' image would give the best picture quality?
a)
24
b)
4
c)
8
d)
2
14.
What language do computers use?
a)
English
b)
Binary
c)
UNICODE
15.
What is meant by the resolution of an image?
a)
The number of pixels in an image
b)
The number of bits in each pixel
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