DSIP Digital Signal & Image Processing MCQ's




Question 31 :
Choose lossless statistical method example

  1. Run length encoding
  2. Huffman Encoding
  3. Jpeg
  4. Improved Gray Scale Quantization
  

Question 32 :
Given two pixels P(5,2) and Q(4,7), the D4 distance between them is

  1. 5
  2. 6
  3. 5.099
  4. 1
  

Question 33 :
Which one of the following is not a limitation of the basic high pass filter

  1. It may produce negative response
  2. It may produce response greater than L-1
  3. It destroys all the constant gray level regions
  4. It generates blurring effect
  

Question 34 :
For the Dissemination-in-time FFT algorithm, which of the following is true?

  1. Both input and output are in order.
  2. Both input and output are shuffled.
  3. Input is shuffled and output is in order.
  4. Input is in order and output is shuffled.
  

Question 35 :
DSPs often use special________ architectures that are able to fetch multiple data or instructions at the same time

  1. memory
  2. finite machine
  3. dual
  4. fast
  

Question 36 :
Auto correlation of x(n) = [ 4, 3, 2, 1 ] and its value at lag=0 are

  1. [4, 11, 12, 30, 20, 12,4] and 30
  2. [4, 11, 20, 30, 20, 12,4] and 30
  3. [3, 11, 20, 30, 20, 12,3] and 20
  4. [4, 11, 20, -30, 20, 12,4] and 11
  

Question 37 :
Correlation is used for __________________

  1. quantization
  2. sampling
  3. folding
  4. computing average power in waveforms
  

Question 38 :
Which is a colour attribute that describes a pure colour?

  1. Saturation
  2. Hue
  3. Brightness
  4. Intensity
  

Question 39 :
Human sounds cannot be characterized with which parameter

  1. Pitch
  2. Sensitivity
  3. Loudness
  4. Quality
  

Question 40 :
Linear convolution can be used to find the response of

  1. Rendering
  2. Audio signal processing
  3. Linear filtering.
  4. Sorting
  

Question 41 :
Which of the following condition should hold true for a signal x[n] to be odd?

  1. x[-n] = x[n] • x[n]
  2. x[n] = -x[-n]
  3. x[n] = [x[n]]3
  4. x[n] = x[n]
  

Question 42 :
If the output of the system of the system at any 'n' depends only the present or the past values of the inputs then the system is said to be:

  1. Linear
  2. Non-Linear
  3. Causal
  4. Non-causal
  

Question 43 :
If sampling frequency is below Nyquist frequency , distortion in the present sprectra due to other spectra in the frequency domain is called as ____

  1. Discrete Fourier Transform
  2. Nyquist – Shannon sampling theory
  3. Aliasing
  4. Up sampling
  

Question 44 :
Which of the following step deals with tools for extracting image components those are useful in the representation and description of shape?

  1. Segmentation
  2. Representation - description
  3. Compression
  4. Morphological processing
  

Question 45 :
What is X(0) for four point sequence x(n)={0,1,2,3}?

  1. 6
  2. 0
  3. 12
  4. 3
  

Question 46 :
A relaxed LTI system is one such that

  1. zero input produces zero output
  2. zero input produces an output equal to unity
  3. zero input produces non-zero output
  4. none of the above
  

Question 47 :
DFT is applied to

  1. Infinite sequences
  2. Finite discrete sequences
  3. Continuous infinite signals
  4. Continuous finite sequences
  

Question 48 :
Point, line, edge detectors are based on ____ of an image

  1. Similarity
  2. equality
  3. discontinuities
  4. nature
  

Question 49 :
Speech recognition system consists of the following except

  1. Microphone
  2. DAC
  3. Pattern matching
  4. Parameter extraction
  

Question 50 :
Hough transform is used for finding

  1. Finding points in image
  2. Finding lines in image
  3. Finding objects in image
  4. Finding moments of an image
  

Question 51 :
Image transforms are needed for

  1. conversion information form spatial to frequency
  2. spatial domain
  3. time domain
  4. frequency domain
  

Question 52 :
A random signal is the one

  1. which is discrete in time
  2. which is discrete in value
  3. which varies with respect to only single variable
  4. which can not be represented using an equation or a set of rules
  

Question 53 :
In terms of image enhancement, what does mean and variance refers to?

  1. Average contrast and average gray level respectively
  2. Average gray level and average contrast respectively
  3. Average gray level in both
  4. Average contrast in both
  

Question 54 :
If a discrete time signal x(n) of length l is convolved with a discrete time signal y(n) of length n then the length of output signal is

  1. l+n-1
  2. l-n+1
  3. l*n
  4. l*n-1
  

Question 55 :
Which of the following is true regarding the number of computations required to compute an N-point DFT?

  1. N2 complex multiplications and N(N-1) complex additions
  2. N2 complex additions and N(N-1) complex multiplications
  3. N2 complex multiplications and N(N+1) complex additions
  4. N2 complex additions and N(N+1) complex multiplications
  

Question 56 :
Any arbitrary input signal can be decomposed and represented as a

  1. product of unit sample sequences
  2. product of unit step sequences
  3. weighted sum of unit step sequences.
  4. weighted sum of unit sample sequences.
  

Question 57 :
Which of the following should be done in order to convert a continuous-time signal to a discrete-time signal?

  1. Sampling
  2. Differentiating
  3. Integrating
  4. Quantization
  

Question 58 :
Histogram equalization is used to

  1. Enhance the contrast of an image
  2. Remove the noises present in an image
  3. Find the contours present in an image
  4. Find the equality present in various regions.
  

Question 59 :
If we perform Opening on images then it smooths the image's

  1. Pixels
  2. Lines
  3. Contour
  4. Boundary
  

Question 60 :
The quality of output signal from a A/D converter is measured in terms of:

  1. Quantization error
  2. Quantization to signal noise ratio
  3. Signal to quantization noise ratio
  4. Conversion constant
  
Pages