# Objective Question Answer of Image Sampling and Quantization Quiz

1. A continuous image is digitised at _______ points.

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

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

2. 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

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

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

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

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

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

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

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

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

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

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

6. 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

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

7. 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 neighbour interpolation
C. bilinear interpolation
D. bicubic interpolation

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

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

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

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

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

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

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

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

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

Quantitatively, spatial resolution cannot be represented in

A. line pairs
B. pixels
C. dots

All the options can be used to represent spatial resolution.

11. The most familiar single sensor used for Image Acquisition is

A. Microdensitometer
B. Photodiode
C. CMOS
D. None of the Mentioned

The most familiar single sensor used for Image Acquisition is Photodiode. The photodiode is the most commonly used single sensor made up of silicon materials.

12. A geometry consisting of an in-line arrangement of sensors for image acquisition

A. A photodiode
B. Sensor strips
C. Sensor arrays
D. CMOS

Sensor strips are very common next to a single sensor and use an in-line arrangement.

13. CAT in imaging stands for

A. Computer-Aided Telegraphy
B. Computer-Aided Tomography
C. Computerised Axial Telegraphy
D. Computerised Axial Tomography

Industrial Computerised Axial Tomography is based on image acquisition using sensor strips.

14. The section of the real plane spanned by the coordinates of an image is called the _____________

A. Spacial Domain
B. Coordinate Axes
C. Plane of Symmetry
D. None of the Mentioned

The section of the real plane spanned by the coordinates of an image is called the Spatial Domain, with the x and y coordinates referred to as Spacial coordinates.

15. The difference in intensity between the highest and the lowest intensity levels in an image is ___________

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