Worksheets1.2.4. Data Storage - representing images
Total questions: 14
Worksheet time: 11mins
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.
The smallest unit of data stored in an image file is called:
a)
Pixels
b)
Resolution
c)
Alpha
d)
Bitmap.
3.
How many colours can an image with a colour depth of 3 store?
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
4.
How many colours can be displayed by an image with a colour depth of 2 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.
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
7.
Reducing the amount of colours in the image will
a)
Reduce the quality of the image.
b)
Reduce the amount of binary needed for each pixel.
c)
Make the file size larger
d)
Remove pixels from the image.
8.
Which is NOT an example of metadata for an image file?
a)
Resolution
b)
Colour depth
c)
Camera used
d)
Sample rate
9.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
10.
Which is NOT an effect of increasing the resolution in an image?
a)
More colours can be displayed.
b)
More binary will be required to create the image.
c)
Larger file size
d)
Higher quality image
11.
Which is NOT an effect of increasing the colour depth in an image?
a)
More colours can be displayed.
b)
More binary will be needed per pixel to create the image.
c)
Larger file size
d)
More pixels will be displayed in the image.
12.
What would be the colour depth of an image which can use up to 256 colours?
a)
256 bit
b)
8 bit
c)
8 byte
d)
256 byte
13.
An image is 10 pixels wide and 8 pixels high. It has a colour depth of 8. What is the file size of the image in bytes?
a)
8
b)
80
c)
800
d)
64
14.
An image is 16 x 16 pixels in size. It has a colour depth of 16 bits. What is the size of the image in KB?
a)
512
b)
5.12
c)
0.5
d)
51.2
100 %
