Free Printable Morphological Image Processing

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Worksheets

Morphological Image Processing

Total questions: 65

Worksheet time: 1hrs 5mins

Name

Class

Date

1.

Fill in the blank: The element used to probe and interact with an image in morphological operations is called the _________.

a)

Structuring Element

b)

Kernel Matrix

c)

Pixel Operator

d)

Morph Mask

2.

Fill in the blank: The morphological operation that removes pixels on object boundaries is called _________.

a)

Erosion

b)

Dilation

c)

Opening

d)

Closing

3.

Fill in the blank: The morphological operation that adds pixels to the boundaries of objects in an image is called _________.

a)

Dilation

b)

Erosion

c)

Thresholding

d)

Segmentation

4.

Fill in the blank: The morphological operation that consists of an erosion followed by a dilation is called _________.

a)

Opening

b)

Closing

c)

Thinning

d)

Thickening

5.

Fill in the blank: The morphological operation that consists of a dilation followed by an erosion is called _________.

a)

Closing

b)

Opening

c)

Thinning

d)

Skeletonization

6.

Fill in the blank: The outlook topics mentioned are Hit-and-miss Operation, Thinning, and _________?

a)

Thickening

b)

Sharpening

c)

Smoothing

d)

Blurring

7.

Fill in the blank: A Structuring Element (SE) is a small binary matrix (usually of 1s and 0s) used to ______ or interact with an image during morphological operations.

a)

probe

b)

color

c)

compress

d)

encrypt

8.

What is the purpose of a Structuring Element (SE)?

a)

To define the color of an image

b)

To define the neighborhood or shape used to analyze and process pixels in the input image

c)

To increase the image resolution

d)

To compress the image

9.

Which of the following statements about structuring elements (kernels) is true?

a)

Structuring elements can only have one size

b)

Structuring elements can have varying sizes

c)

Structuring elements always have the value 1

d)

Structuring elements do not have an origin

10.

Usually, element values in structuring elements are:

a)

0, 1, and none

b)

2, 3, and 4

c)

Only 1

d)

Only 0

11.

Fill in the blank: Structural elements have an _______.

a)

origin

b)

end

c)

color

d)

weight

12.

For thinning, other values are possible in structuring elements.

a)

True

b)

False

13.

Empty spots in the structuring elements are called _________.

a)

don't care's

b)

pixels

c)

holes

d)

markers

14.

Refer to the diagram labeled 'Box'. What is the value at the origin of the structuring element?

a)

1

b)

0

c)

2

d)

-1

15.

Refer to the diagram labeled 'Disc'. What is the value at the origin of the structuring element?

a)

1

b)

0

c)

2

d)

-1

16.

Which of the following is a shape example?

a)

Triangle

b)

Square

c)

Pentagon

d)

Hexagon

17.

Which of the following is a shape example?

a)

Rectangle

b)

Octagon

c)

Ellipse

d)

Trapezoid

18.

Which of the following is a shape example?

a)

Disk (circle)

b)

Triangle

c)

Parallelogram

d)

Rhombus

19.

Which of the following is a shape example?

a)

Line

b)

Pentagon

c)

Star

d)

Arrow

20.

Which of the following is a shape example?

a)

Cross

b)

Heart

c)

Diamond

d)

Crescent

21.

Which morphological operation removes pixels from object boundaries based on SE shape?

a)

Erosion

b)

Dilation

c)

Opening

d)

Closing

22.

Which morphological operation adds pixels to object boundaries using the SE?

a)

Dilation

b)

Erosion

c)

Opening

d)

Closing

23.

Which morphological operation is defined as erosion followed by dilation (smooths objects)?

a)

Opening

b)

Closing

c)

Dilation

d)

Erosion

24.

Which morphological operation is defined as dilation followed by erosion (fills gaps)?

a)

Closing

b)

Opening

c)

Erosion

d)

Top-hat

25.

What is the effect of the morphological operation 'Erosion'?

a)

Grow

b)

Shrink

c)

Rotate

d)

Blur

26.

What is the effect of the morphological operation 'Dilation'?

a)

Shrink

b)

Grow

c)

Blur

d)

Rotate

27.

Combining morphological operations to form 'Opening' keeps the general shape but smooths with respect to the _________.

a)

object

b)

background

c)

intensity

d)

color

28.

Combining morphological operations to form 'Closing' keeps the general shape but smooths with respect to the _________.

a)

background

b)

object

c)

edges

d)

center

29.

Erosion _______ foreground and _______ background. (Fill in the blanks)

a)

shrinks foreground and enlarges background

b)

enlarges foreground and shrinks background

c)

enlarges foreground and enlarges background

d)

shrinks foreground and shrinks background

30.

Dilation _______ foreground and _______ background.

a)

enlarges; shrinks

b)

shrinks; enlarges

c)

removes; adds

d)

blurs; sharpens

31.

What is erosion in image processing?

a)

The set of all points in the image where the structuring element fits into

b)

The set of all points in the image where the structuring element does not fit

c)

The process of adding pixels to the image

d)

The process of changing the color of the image

32.

Fill in the blank: In erosion, if the structuring element fits in, write a "___" at the origin of the structuring element.

a)

1

b)

0

c)

X

d)

Y

33.

Which of the following is a simple application of erosion in image processing?

a)

Pattern matching

b)

Color enhancement

c)

Edge detection

d)

Histogram equalization

34.

What are the required inputs for erosion in image processing?

a)

Binary Image (Gray value) and Structuring Element containing only 1s

b)

Color Image and Structuring Element containing only 0s

c)

Binary Image (Gray value) and Color Filter

d)

Histogram and Structuring Element containing only 1s

35.

Erosion is an important ________ operation. (Fill in the blank)

a)

morphological

b)

chemical

c)

thermal

d)

mechanical

36.

Which structuring element is applied in the given example of erosion?

a)

1 0 1 0 1 0 1 0 1

b)

1 1 1 1 1 1 1 1 1

c)

0 1 0 1 1 1 0 1 0

d)

1 1 1 1 0 1 1 1 1

37.

Which of the following is a set of coordinate points for the structuring element used in the erosion example?

a)

{(-1, -1), (0, -1), (1, -1), (-1, 0), (0, 0), (1, 0), (-1, 1), (0, 1), (1, 1)}

b)

{(0, 0), (1, 1), (2, 2)}

c)

{(-1, 0), (0, 0), (1, 0)}

d)

{(0, -1), (0, 0), (0, 1)}

38.

What image processing operation is being demonstrated in the example with the input image: 1 0 0 0 1 1 1 0 1 1 and structuring element: 1 1 1?

a)

Dilation

b)

Erosion

c)

Opening

d)

Closing

39.

Refer to the diagram titled 'Example for Erosion'. What is the structuring element used in the example?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 1

40.

What is the structuring element used in the example for erosion shown in the image?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 0

41.

Given the following input image for erosion: 1 0 0 0 1 1 1 0 1 1, fill in the blank for the structuring element used in this example. Structuring Element: [ _ _ _ ]

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 1

42.

Given the input image: 1 0 0 0 1 1 1 0 1 1 and the structuring element: 1 1 1, fill in the blank for the output image after erosion. Output Image: [ _ _ _ 0 0 1 _ _ _ _ ]

a)

0 0 0 0 1

b)

1 1 0 0 1

c)

0 1 1 0 0

d)

1 0 0 1 1

43.

What is the structuring element used in the given example for erosion?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 1

44.

Refer to the 'Example for Erosion' diagram. What is the structuring element used in the erosion operation?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 1

45.

Refer to the 'Example for Erosion' diagram. What is the output image after applying the structuring element to the input image?

a)

0 0 0 0 1 0 0

b)

1 1 1 0 0 1 1

c)

0 1 0 0 1 1 0

d)

1 0 0 1 0 0 1

46.

What is the input image in the given example for erosion?

a)

1 0 0 0 1 1 1 0 1 1

b)

1 1 0 0 1 0 1 1 0 1

c)

0 1 1 0 0 1 1 1 0 1

d)

1 0 1 1 0 1 0 1 1 0

47.

What is the structuring element used in the given example for erosion?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 0

48.

What is the output image after applying erosion in the given example?

a)

0 0 0 0 1 0 0 0

b)

0 1 1 0 1 1 0 0

c)

1 1 0 0 0 0 1 1

d)

0 0 0 1 0 0 0 0

49.

What happens to the image as a result of erosion?

a)

It gets lighter

b)

It gets darker

c)

It remains the same

d)

It gets blurred

50.

Fill in the blank: In the given example, white is represented by __ and black is represented by __.

a)

white is represented by 0 and black is represented by 1

b)

white is represented by 1 and black is represented by 0

c)

white is represented by 1 and black is represented by 2

d)

white is represented by 2 and black is represented by 1

51.

Why is counting coins difficult according to the image?

a)

Because they are different sizes

b)

Because they touch each other

c)

Because they are different colors

d)

Because they are heavy

52.

What is the solution mentioned in the image for separating touching coins?

a)

Coloring

b)

Binarization and Erosion

c)

Addition

d)

Subtraction

53.

The process of ________ and ________ helps to separate touching coins, as shown in the images below.

a)

Binarization, Erosion

b)

Smoothing, Dilation

c)

Thresholding, Blurring

d)

Sharpening, Morphing

54.

Determine the output image after performing erosion on the given input image. Input Image: 1011110110 Structuring element: 101

a)

0011100000

b)

1011100000

c)

0001100000

d)

0011110000

55.

What is the meaning of the word 'DILATION'?

a)

Dilation is a transformation that changes the size of a figure but not its shape.

b)

Dilation is a transformation that changes the color of a figure.

c)

Dilation is a transformation that rotates a figure.

d)

Dilation is a transformation that reflects a figure over a line.

56.

What is an important morphological operation shown in the example?

a)

Erosion

b)

Dilation

c)

Opening

d)

Closing

57.

Fill in the blank: The applied structuring element for the dilation operation is a 3x3 matrix with all values as ___.

a)

1

b)

0

c)

-1

d)

2

58.

What is dilation in image processing? Fill in the blank: Dilation is the set of all points in the image, where the structuring element '______' the foreground.

a)

touches

b)

ignores

c)

removes

d)

erases

59.

Consider each pixel in the input image. If the structuring element touches the foreground image, what should you write at the origin of the structuring element?

a)

Write a '1' at the origin of the structuring element.

b)

Write a '0' at the origin of the structuring element.

c)

Leave the origin unchanged.

d)

Invert the value at the origin of the structuring element.

60.

Which of the following are required as input for dilation in image processing?

a)

Binary Image

b)

Grayscale Image

c)

Structuring Element containing only 1s

d)

Color Image

61.

Refer to the diagram titled 'Example for Dilation'. What is the input image sequence shown in the example?

a)

1 0 0 0 1 1 1 0 1 1

b)

1 1 0 0 1 1 1 0 1 1

c)

1 0 0 0 1 1 1 1 0 1

d)

1 0 0 0 1 1 1 0 1 1

62.

What is the structuring element used in the dilation example shown in the image?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 1

63.

In the given example for dilation, what is the structuring element?

a)

1 1 1

b)

0 1 0

c)

1 0 1

d)

0 0 0

64.

What is the structuring element used in the dilation example shown in the image?

a)

[1 1 1]

b)

[0 1 0]

c)

[1 0 1]

d)

[1 1 0]

65.

What is the structuring element used in the dilation example shown in the image?

a)

[1 1 1]

b)

[0 1 0]

c)

[1 0 1]

d)

[1 1 0]

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