Digital Image Processing Mathematical Tool MCQ [Free PDF] - Objective Question Answer for Digital Image Processing Mathematical Tool Quiz

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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”.

10. 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.

11. To convert a continuous sensed data into Digital form, which of the following is required?

A. Sampling
B. Quantization
C. Both Sampling and Quantization
D. Neither Sampling nor Quantization

Answer: C

The output of most sensors is a continuous waveform and the amplitude and spatial behavior of such waveform are related to the physical phenomenon being sensed.

12. To convert a continuous image f(x, y) to digital form, we have to sample the function in __________

A. Coordinates
B. Amplitude`
C. All of the mentioned
D. None of the mentioned

Answer: C

An image may be continuous in the x- and y-coordinates or amplitude, or both.

13. For a continuous image f(x, y), how could be Sampling defined?

A. Digitizing the coordinate values
B. Digitizing the amplitude values
C. All of the mentioned
D. None of the mentioned

Answer: A

Sampling is the method of digitizing the coordinate values of the image.

14. For a continuous image f(x, y), Quantization is defined as

A. Digitizing the coordinate values
B. Digitizing the amplitude values
C. All of the mentioned
D. None of the mentioned

Answer: B

Sampling is the method of digitizing the amplitude values of the image.

15. “For a given image in one-dimension given by function f(x, y), to sample the function we take equally spaced samples, superimposed on the function, along a horizontal line. However, the sample values still span (vertically) a continuous range of gray-level values. So, to convert the given function into a digital function, the gray-level values must be divided into various discrete levels.”

A. True
B. False

Answer: A

The digital function requires both sampling and quantization of the one-dimensional image function.

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