21. In the digital image of M rows and N columns and L discrete gray levels, calculate the bits required to store a digitized image for M=N=32 and L=16.

A. 16384
B. 4096
C. 8192
D. 512

Answer: B

In the digital image of M rows and N columns and L max gray levels i.e. an integer power of 2 for each pixel. The number, b, of bits required to store a digitized image is b=M*N*k.
For L=16, k=4.
i.e. b=4096.

21. A continuous image is digitised at _______ points.

A. random
B. vertex
C. contour
D. sampling

Answer: D

The sampling points are ordered in the plane and their relation is called a Grid.

22. The transition between continuous values of the image function and its digital equivalent is called __________

A. Quantisation
B. Sampling
C. Rasterisation
D. None of the Mentioned

Answer: A

The transition between continuous values of the image function and its digital equivalent is called Quantisation.

23. Images quantised with insufficient brightness levels will lead to the occurrence of ____________

A. Pixillation
B. Blurring
C. False Contours
D. None of the Mentioned

Answer: C

The false Contour effect arises when the number of brightness levels is lower than that which the human eye can distinguish.

24. The smallest discernible change in intensity level is called ____________

A. Intensity Resolution
B. Contour
C. Saturation
D. Contrast

Answer: A

The number of bits used to quantize the intensity of an image is called intensity resolution.

The intensity of resolution means the number of pixels per square inch, which determines the clarity or sharpness of an image.

25. What is the tool used in tasks such as zooming, shrinking, rotating, etc.?

A. Sampling
B. Interpolation
C. Filters
D. None of the Mentioned

Answer: B

Interpolation is the basic tool used for zooming, shrinking, rotating, etc.

26. The type of Interpolation where for each new location the intensity of the immediate pixel is assigned is ___________

A. bicubic interpolation
B. cubic interpolation
C. bilinear interpolation
D. nearest-neighbor interpolation

Answer: D

The type of Interpolation where for each new location the intensity of the immediate pixel is assigned is a nearest-neighbor interpolation.

It’s called Nearest Neighbour Interpolation since for each new location the intensity of the next neighboring pixel is assigned.

27. The type of Interpolation where the intensity of the FOUR neighboring pixels is used to obtain the intensity of a new location is called ___________

A. cubic interpolation
B. nearest-neighbor interpolation
C. bilinear interpolation
D. bicubic interpolation

Answer: B

The type of Interpolation where the intensity of the FOUR neighboring pixels is used to obtain the intensity of a new location is called nearest-neighbor interpolation.

Bilinear interpolation is where the FOUR neighboring pixels are used to estimate intensity for a new location.

28. Dynamic range of the imaging system is a ratio where the upper limit is determined by

A. Saturation
B. Noise
C. Brightness
D. Contrast

Answer: A

The dynamic range of the imaging system is a ratio where the upper limit is determined by Saturation. It is taken as the Numerator.

29. For the Dynamic range ratio the lower limit is determined by

A. Saturation
B. Brightness
C. Noise
D. Contrast

Answer: C

For the Dynamic range ratio, the lower limit is determined by Noise. It is taken as the Denominator.

30. Quantitatively, spatial resolution cannot be represented in which of the following ways

A. line pairs
B. pixels
C. dots
D. none of the Mentioned

Answer: D

Quantitatively, spatial resolution cannot be represented in

A. line pairs
B. pixels
C. dots

All the options can be used to represent spatial resolution.