DSIP Digital Signal & Image Processing MCQ's

Question 1 :
Condition for splitting an image is

1. Difference of any two pixel values should be less than threshold values
2. Difference of any two pixel values should be greater than equal to threshold values
3. Difference of maximum pixel value and minimum pixel value should be less than threshold values
4. Difference of maximum pixel value and minimum pixel value should be greater than threshold values

Question 2 :
On decompression of file, which technique retrieved exact image without any loss of information

1. Huffman coding
2. Improved grey scale quantization
3. JPEG
4. Vector quantization

Question 3 :
What will be the linear convolution of the sequences x(n)={1,2} and h(n)={2,1} using DFT.

1. {2, 2, 5}
2. {5, 2, 5}
3. {2, 5, 2}
4. {5, 5, 2}

Question 4 :
IIR and FIR systems stand for

1. Infinite Impulse Response and Finite Impulse Response
2. Infinite Impulse Request and Finite Impulse Response
3. Infinite Impulse Response and Finite Impulse Request
4. Infinite Impulse Request and Finite Impulse Request

Question 5 :
The overlap save method is used to calculate

1. The discrete convolution between a sampled signal and a finite impulse response (FIR) filter
2. The discrete convolution between a sampled signal and an infinite impulse response (IIR) filter
3. The discrete convolution between a very long signal and a finite impulse response (FIR) filter
4. The discrete convolution between a very long signal and a infinite impulse response (IIR) filter

Question 6 :
A good representation of the derivative of a step function u(t) is...

1. Another step function
2. A complex exponential
3. A ramp mt, where m is the slope.
4. A delta function δ(t)

Question 7 :
Method generating a processed image having specified histogram is called

1. histogram enhancement
2. histogram normalization
3. histogram equalization
4. histogram matching

Question 8 :
Given image ‘I’ and structuring element ‘s’ , boundary (I) given as

1. I – (I ө s)
2. I + (I ө s)
3. (I ө s) - I
4. (I ө s) + I

Question 9 :
Structuring element runs over image's

1. rows
2. columns
3. edges
4. every element

Question 10 :
All the pixels at Euclidean distance of r from given pixel P form

1. A circle centered at P
2. A square centered at P
3. A triangle centered at P
4. A rectangle centered at P

Question 11 :
Given A={(1,0), (1,1), (1,2), (0,3), (1,3), (2,3), (3,3), (1,4)} and B={(0,0), (1,0)} Result of A eroded B will be

1. {(0,3), (1,3), (2,3)}
2. {(1,3), (2,3), (3,3)}
3. {(0,0), (1,3), (2,3)}
4. {(0,3), (2,3), (3,3)}

Question 12 :
Computation of linear filtering of a sequence using FFT algorithm requires no. of complex additions are

1. (N/2)logN
2. 2NlogN [Base=2]
3. (N/2)logN [Base=2]
4. NlogN [Base=2]

Question 13 :
Thresholding function in contrast stretching creates

1. binary image
2. high quality image
3. enhanced image
4. low quality image

Question 14 :
If component of histogram are concentrated on the lower (towards zero) side of the gray scale then it is a histogram of

1. Dark Image
2. Bright Image
3. Low constrast image
4. High constrast image

Question 15 :
The error in the image due to low tonal resolution is called

1. Checker board effect
2. False contouring
3. Quantization error
4. Blurring effect

Question 16 :
DIT-FFT stands for

1. Discrete In Time Fast Fourier Transform
2. Decompose In Time Fast Fourier Transform
3. Divide In Time Fast Fourier Transform
4. Decimation In Time Fast Fourier Transform

Question 17 :
Wavelet series equation is the sum of _________________

1. scaling and detail
2. row and col inverse
3. spatial and frequency mean
4. row andsummation detail along column

Question 18 :
Fully containment of the Structuring element in an image is required in

1. opening
2. closing
3. erosion
4. dilation

Question 19 :
Which is true about bit plane slicing?

1. Highest order plane contains most of the information of an image
2. Lowest order plane contains most of the information of an image
3. Mid order plane contains most of the information of an image
4. All plane contains equal information of an image

Question 20 :
For a 16-point FFT, the number of complex multiplication and addition is

1. 32 and 64 respectively
2. 16 and 32 respectively
3. 80 and 160 respectively
4. 12 and 24 respectively

Question 21 :
If the impulse response the system is of infinite duration then it is called

1. FIR system
2. IIR system
3. IFR system
4. IIF system

Question 22 :
Which of the following is not among the type of architectures used for DSP processors

1. Von Neumann
2. Harvard
3. SISD
4. Modified Harvard

Question 23 :
When the human eye does not respond with equal sensitivity to all visual information

1. Spatial redundancy
2. Psychovisual redundancy
3. Coding redundancy
4. Temporal redundancy

Question 24 :
DTFT is the representation of

1. Periodic Discrete time signals
2. Aperiodic Discrete time signals
3. Aperiodic continuous signals
4. Periodic continuous signals

Question 25 :
Structuring element is also called

1. pixels
2. lines
3. subimage
4. noise

Question 26 :
Which of the following techniques is based on the Fourier transform?

1. spectral
2. topological
3. statistical
4. structural

Question 27 :
The transform which possess the multi-resolution property in an image is:

1. Fast Fourier Transform (FFT)
2. Discrete Cosine Transform (DCT)
3. Short Term Fourier Transform (STFT)
4. Wavelet Transform

Question 28 :
The basic idea behind Huffman coding is to

1. compress data by using fewer bits to encode more frequently occuring pixels
2. expand data by using fewer bits to encode more frequently occuring pixels
3. compress data by using fewer bits to encode fewer frequently occuring pixels
4. compress data by using more bits to encode more frequently occuring pixels

Question 29 :
Example of an isotropic filter is

1. Robert
2. Sobel
3. Laplacian
4. Prewitt

Question 30 :
The D8 distance is also called

1. Manhattan distance
2. City block distance
3. Chessboard distance
4. Euclidean distance