Image Sensing and Acquisition MCQ [Free PDF] - Objective Question Answer for Image Sensing and Acquisition Quiz

16. Which of the following is used for chest and dental scans?

A. Hard X-Rays
B. Soft X-Rays
C. Radio waves
D. Infrared Rays

Answer: B

Soft X-Rays (low energy) are used for dental and chest scans.

17. Which of the following is impractical to measure?

A. Frequency
B. Radiance
C. Luminance
D. Brightness

Answer: D

Brightness is the subjective descriptor of light perception that is impossible to measure.

18. Massless particle containing a certain amount of energy is called

A. Photon
B. Shell
C. Electron
D. None of the mentioned

Answer: A

A massless particle containing a certain amount of energy is called a photon. Each bundle of massless energy is called a Photon.

19. What do you mean by achromatic light?

A. Chromatic light
B. Monochromatic light
C. Infrared light
D. Invisible light

Answer: B

Achromatic light is also called monochromatic light. (Light void of color)

20. Which of the following embodies the achromatic notion of intensity?

A. Luminance
B. Brightness
C. Frequency
D. Radiance

Answer: B

Brightness embodies the achromatic notion of intensity and is a key factor in describing the color sensation.

21. How is array operation carried out involving one or more images?

A. array by array
B. pixel by pixel
C. column by column
D. row by row

Answer: B

Any array operation is carried out on a pixel-by-pixel basis.

22. The property indicating that the output of a linear operation due to the sum of two inputs is the same as performing the operation on the inputs individually and then summing the results is called ___________

A. additivity
B. heterogeneity
C. homogeneity
D. None of the Mentioned

Answer: A

The property indicating that the output of a linear operation due to the sum of two inputs is the same as performing the operation on the inputs individually and then summing the results is called additivity.

23. The property indicating that the output of a linear operation to a constant time as input is the same as the output of operation due to original input multiplied by that constant is called _________

A. additivity
B. heterogeneity
C. homogeneity
D. None of the Mentioned

Answer: C

The property indicating that the output of a linear operation to a constant time as input is the same as the output of operation due to original input multiplied by that constant is called homogeneity.

24. Enhancement of differences between images is based on the principle of ____________

A. Additivity
B. Homogeneity
C. Subtraction
D. None of the Mentioned

Answer: C

A frequent application of image subtraction is in the enhancement of differences between images.

25. A commercial use of Image Subtraction is ___________

A. Mask mode radiography
B. MRI scan
C. CT scan
D. None of the Mentioned

Answer: A

Mask mode radiography is an important medical imaging area based on Image Subtraction.

26. Region of Interest (ROI) operations is commonly called as ___________

A. Shading correction
B. Masking
C. Dilation
D. None of the Mentioned

Answer: B

A common use of image multiplication is Masking, also called ROI operation.

27. If every element of a set A is also an element of a set B, then A is said to be a _________ of set B.

A. Disjoint set
B. Union
C. Subset
D. Complement set

Answer: C

If every element of a set A is also an element of a set B, then A is said to be a subset of set B.

28. Consider two regions A and B composed of foreground pixels. The ________ of these two sets is the set of elements belonging to set A or set B or both.

A. OR
B. AND
C. NOT
D. XOR

Answer: A

Consider two regions A and B composed of foreground pixels. The OR of these two sets is the set of elements belonging to set A or set B or both.

29. Imaging systems having physical artifacts embedded in the imaging sensors produce a set of points called __________

A. Tie Points
B. Control Points
C. Reseau Marks
D. None of the Mentioned

Answer: C

Imaging systems having physical artifacts embedded in the imaging sensors produce a set of points called “known” points or “Reseau marks”.

30. Image processing approaches operating directly on pixels of input image work directly in ____________

A. Transform domain
B. Spatial domain
C. Inverse transformation
D. None of the Mentioned

Answer: B

Operations directly on pixels of input image work directly in the Spatial Domain.

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