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Information Science
1000 Digital Image Processing
Quiz 2
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Q.1
What is the procedure done on a digital image to alter the values of its individual pixels known as?
a) Geometric Spacial Transformation
b) Single Pixel Operation
c) Image Registration
d) Neighbourhood Operations
Q.2
Points whose locations are known exactly in the input and reference images are used in Geometric Spacial Transformation.
a) Known points
b) Key-points
c) Réseau points
d) Tie points
Q.3
___________ is a commercial use of Image Subtraction.
a) MRI scan
b) CT scan
c) Mask mode radiography
d) None of the Mentioned
Q.4
Approaches to image processing that work directly on the pixels of incoming image work in ____________
a) Spatial domain
b) Inverse transformation
c) Transform domain
d) None of the Mentioned
Q.5
Which of the following in an image can be removed by using a smoothing filter?
a) Sharp transitions of brightness levels
b) Sharp transitions of gray levels
c) Smooth transitions of gray levels
d) Smooth transitions of brightness levels
Q.6
Region of Interest (ROI) operations is generally known as _______
a) Masking
b) Dilation
c) Shading correction
d) None of the Mentioned
Q.7
Which of the following comes under the application of image blurring?
a) Image segmentation
b) Object motion
c) Object detection
d) Gross representation
Q.8
Which of the following filter’s responses is based on the pixels ranking?
a) Sharpening filters
b) Nonlinear smoothing filters
c) Geometric mean filter
d) Linear smoothing filters
Q.9
Which of the following illustrates three main types of image enhancing functions?
a) Linear, logarithmic and power law
b) Linear, logarithmic and inverse law
c) Linear, exponential and inverse law
d) Power law, logarithmic and inverse law
Q.10
Which of the following is the primary objective of sharpening of an image?
a) Decrease the brightness of the image
b) Increase the brightness of the image
c) Highlight fine details in the image
d) Blurring the image
Q.11
Which of the following operation is done on the pixels in sharpening the image, in the spatial domain?
a) Differentiation
b) Median
c) Integration
d) Average
Q.12
________ is the principle objective of Sharpening, to highlight transitions.
a) Brightness
b) Pixel density
c) Composure
d) Intensity
Q.13
_________ enhance Image Differentiation?
a) Pixel Density
b) Contours
c) Edges
d) None of the mentioned
Q.14
Which of the following fact is correct for an image?
a) An image is the multiplication of illumination and reflectance component
b) An image is the subtraction of reflectance component from illumination component
c) An image is the subtraction of illumination component from reflectance component
d) An image is the addition of illumination and reflectance component
Q.15
Which of the following occurs in Unsharp Masking?
a) Subtracting blurred image from original
b) Blurring the original image
c) Adding a mask to the original image
d) All of the mentioned
Q.16
Which of the following makes an image difficult to enhance?
a) Dynamic range of intensity levels
b) High noise
c) Narrow range of intensity levels
d) All of the mentioned
Q.17
_________ is the process of moving a filter mask over the image and computing the sum of products at each location.
a) Nonlinear spatial filtering
b) Convolution
c) Correlation
d) Linear spatial filtering
Q.18
Which side of the greyscale is the components of the histogram concentrated in a dark image?
a) Medium
b) Low
c) Evenly distributed
d) High
Q.19
Which of the following is the application of Histogram Equalisation?
a) Blurring
b) Contrast adjustment
c) Image enhancement
d) None of the Mentioned
Q.20
Which of the following is the expansion of PDF, in uniform PDF?
a) Probability Density Function
b) Previously Derived Function
c) Post Derivation Function
d) Portable Document Format
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