Virtual Labs

1. Mathematical morphology is primarily concerned with operations that analyze or modify image

a: Forms and shapes of structures Explanation

Explanation

b: File names and formats Explanation

Explanation

c: Audio frequencies Explanation

Explanation

d: Camera exposure settings Explanation

Explanation

2. Which operation decreases the size of foreground objects in a binary image?

a: Dilation Explanation

Explanation

b: Opening Explanation

Explanation

c: Erosion Explanation

Explanation

d: Closing Explanation

Explanation

3. Which operation can connect two objects that are separated by a sufficiently small distance?

a: Erosion Explanation

Explanation

b: Dilation Explanation

Explanation

c: Opening Explanation

Explanation

d: Reflection Explanation

Explanation

4. Which sequence defines the closing operation?

a: Erosion followed by dilation Explanation

Explanation

b: Dilation followed by erosion Explanation

Explanation

c: Dilation followed by reflection Explanation

Explanation

d: Reflection followed by erosion Explanation

Explanation

5. An application contains small gaps along the boundary of a foreground object. Which operation is most appropriate for filling such gaps, when the structuring element is suitably chosen?

a: Closing Explanation

Explanation

b: Erosion Explanation

Explanation

c: Reflection Explanation

Explanation

d: Translation Explanation

Explanation

6. A circular structuring element is preferred for an image containing predominantly circular or non-oriented objects. What principle does this illustrate?

a: The structuring-element shape should be unrelated to the image Explanation

Explanation

b: Only square structuring elements are valid Explanation

Explanation

c: The structuring-element shape should be selected according to the geometric features of interest Explanation

Explanation

d: The structuring-element shape determines the image resolution Explanation

Explanation

7. A binary image contains a thin bulge on the boundary of a larger foreground object. Which operation is described as eliminating such thin boundary bulges?

a: Dilation Explanation

Explanation

b: Closing Explanation

Explanation

c: Translation Explanation

Explanation

d: Opening Explanation

Explanation

8. In grayscale morphology, a neighbourhood has pixel values

20

35

50

, and

80

. According to the extrema-based definition, what value would dilation select from this neighbourhood?

20

Explanation

35

Explanation

50

Explanation

80

Explanation

9. The same structuring element

B

is used for opening and closing. Which statement correctly describes the two operations?

a: Opening applies erosion then dilation, while closing applies dilation then erosion Explanation

Explanation

b: Opening and closing both apply erosion twice Explanation

Explanation

c: Opening applies dilation twice, while closing applies erosion twice Explanation

Explanation

d: The order of operations is irrelevant Explanation

Explanation

Morphological Operations