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Image Processing

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.
What is a pixel?
a)
Tiny squares of colour on a screen.
b)
A fairy like creature that lives in a forest.
c)
A whole picture.
d)
A binary code.
2.
What happens the further you zoom in on a picture?
a)
The less pixels you can see.
b)
The pixels are easier to see.
c)
The pixels jump.
d)
The pixels swap places.
3.
Which of the following is an image file format?
a)
.ppt
b)
.avi
c)
.gif
d)
.mpg
4.

Which image file format will NOT let you have a transparent background?

a)

GIF

b)

BMP

c)

JPG

5.

Which file format has the lowest quality?

a)

BMP

b)

JPG

c)

GIF

6.

Which file formats have the highest quality? (choose 2!)

a)

BMP

b)

GIF

c)

JPG

7.

Would I use JPG for a cinema poster?

a)

Yes

b)

No

8.

Would I use GIF for a website banner?

a)

Yes

b)

No

9.
Which file type supports animation and transparency?
a)
GIF
b)
JPG
c)
PNG
d)
EPS
10.
An athletic company wants to use an animated graphic on its website.
Which file is the best option to use?
a)
sport.jpg
b)
sport.gif
11.
Miss Solly is taking pictures of her sister at the zoo to post on her family website. Which file format would be most appropriate?
a)
JPEG
b)
GIF
12.
Why are vector files often high quality, even when you zoom in or out of the image?
a)
Because the precise position of each part of the image can be recalculated using the coordinates and mathematical formulae
b)
Because engineers and people that use vector files often use more powerful computers than people at home
c)
Because screens and printers are much more detailed than they used to be
13.
What is resolution?
a)
It is the total number of pixels in an image
b)
It is a measure of how many pixels are used in a given area
c)
It is a measure of how much an image has been compressed
d)
It is a measure of how big an object is
14.
What does 'dpi' mean?
a)
The number of colours supported by the image format
b)
The number of dots that can be plotted each second on a screen or printer
c)
The number of digits per item
d)
The number of dots used per horizontal inch in the image
15.
Why do bitmap images often appear blocky if you enlarge them too much?
a)
Because there is only a limited amount of detail in the bitmap image
b)
Because of rounding errors in the calculations for the coordinates and formulae being used to draw the image
c)
Because adding new pixels to the image would take up all of the computer's memory as you zoom in
d)
The computer is  unable to correctly display it
16.
Which of these formats uses lossless compression?
a)
GIF
b)
JPG
c)
PNG
d)
MP3
17.

Typically, a .jpg file will be a larger file than a .txt file

a)

True

b)

False

18.

What is a vector image?

a)

An image composed of many tiny pixels, in which each individual pixel can be edited

b)

An image or graphic taken from the internet

c)

An image that can be scaled up or down with no loss of quality

d)

An image constructed using proportional formulas rather than pixels.

19.
What is an advantage of a vector image?
a)
Images can be scaled up or down with no loss of quality
b)
Individual pixels can be changed, which makes very detailed editing possible
c)
They have a large file size
d)
They look real
20.

Identify the common file formats for raster images:

a)

.html, .htm

b)

.svg, .eps, .xml

c)

.doc, .ppt, .xls

d)

.bmp, .jpg, .gif, .jpeg

21.

Which of the following describes a low resolution graphic?

a)

Low number of pixels, low quality image, low file size

b)

Low number of pixels, high quality image, high file size

c)

High number of pixels, high quality image, low file size

d)

High number of pixels, high quality image, high file size

22.

Vector graphics can be easily edited using a computer software.

a)

TRUE

b)

FALSE

23.

After enlarging a graphic, our screen shows the above. We can confirm that it is a ______ graphic.

a)

bitmap

b)

vector

24.

After enlarging a graphic, our screen shows the above. We can confirm that it is a ______ graphic.

a)

bitmap

b)

vector

25.
A vector graphic is made up of 
a)
points, lines, and fills
b)
pentagons
c)
pixels 
d)
diamonds
26.
The best example of a bitmap image would be a digital photograph.
a)
True
b)
False
27.
Image programs save graphics with specific extensions indicating the file format.
a)
True
b)
False
28.
Type of compression that deletes or changes some pixels while making the file size smaller.
a)
Lossless compression
b)
Lossy compression
29.
Type of compression that reduces the file size without losing any pixel information.
a)
Lossless compression
b)
Lossy compression
30.

Nick wants to use an image to enhance his document but does not want to spend a long time creating the image. What type of graphic should he use? (Disadvantages of Vectors)

a)

Raster

b)

Vector

c)

Clip art

d)

Illustrator

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