WorksheetsDigital Image Processing Unit 1 and unit 2
Total questions: 25
Worksheet time: 25mins
The spatial coordinates of a digital image (x,y) are proportional to:
Position
Brightness
Contrast
Noise
An image is considered to be a function of a(x,y), where a represents:
Height of image
Width of image
Amplitude of image
Resolution of
image
What is pixel?
Pixel is the elements of a digital image
Pixel is the elements of an analog image
Pixel is the cluster of a digital image
Pixel is the cluster of an analog image
Which of the following step deals with tools for extracting image components those are useful in the representation and description of shape?
Segmentation
Representation & description
Compression
Morphological processing
How is image formation in the eye different from that in a photographic camera ?
No difference
Variable focal length
Varying distance between lens and imaging
plane
Fixed focal
length
The absence of receptors is in the retinal area called _____________
Lens
Ciliary body
Blind spot
Fovea
What is the function of Iris?
Source of nutrition
Detect color
Varies focal length
Control amount
of light
Ratio of number of rods to the number of cones is _______
1:20
1:02
1:01
1:05
After digitization process a digital image with M rows and N columns have to be positive and for the number, L, max gray levels i.e. an integer power of 2 for each pixel. Then,
b=M*N*k
b=M*N*L
b=M*L*k
b=L*N*k
The smallest discernible change in intensity level is called ____________
Intensity Resolution
Contour
Saturation
Contrast
What are the basic quantities that are used to describe the quality of a chromatic light source?
Radiance, brightness
and wavelength
Brightness and luminence
Radiance, brightness and luminence
Luminence and
radiance
How many bit RGB color image is represented by full-color image?
32-bit RGB color image
24-bit RGB color image
16-bit RGB color image
8-bit RGB color image
Two regions are said to be ___________ if their union forms a connected set.
Adjacent
Disjoint
Closed
connected
The Phenomenon of preserving brightness pattern near the boundaries is called
simultaneous contrast
mach band effect
optical illusion
brightness discrimination
The distance between pixels p and q, the pixels have a distance less than or equal to some value of radius r centred at (x,y) is called :
Euclidean distance
City-Block distance
Chessboard distance
squared distance
In which step of the processing, assigning a label (e.g., “vehicle”) to an object based on its descriptors is done?
Object recognition
Morphological processing
Segmentation
Representation & description
What is the correct sequence of steps in image processing?
Image acquisition->Image enhancement->Image restoration->Color image processing->Compression->Wavelets and multi resolution processing->Morphological processing->Segmentation->Representation & description->Object recognition
Image acquisition->Image enhancement->Image restoration->Color image processing->Wavelets and multi resolution processing->Compression->Morphological processing->Segmentation->Representation & description->Object
recognition
Image acquisition->Image enhancement->Color image processing->Image restoration->Wavelets and multi resolution processing->Compression->Morphological processing->Segmentation->Representation & description->Object recognition
Image acquisition->Image enhancement->Image restoration->Color image processing->Wavelets and multi resolution
processing->Compression->Morphological processing->Representation & description->Segmentation->Object recognition
What does a shift up and right in the curves of isopreference curve simply means? Verify in terms of N (number of pixels) and k (L=2k, L is the gray level) values.
Smaller values for N and k, implies a better picture quality
Larger values for N and k, implies low picture quality
Larger values for N and k, implies better picture quality
Smaller values for N and k, implies low picture quality
Assume that an image f(x, y) is sampled so that the result has M rows and N columns. If the values of the coordinates at the origin are (x, y) = (0, 0), then the notation (0, 1) is
Second sample along first row
First sample along second row
First sample along first row
Second sample along second row
A pixel p at coordinates (x, y) has neighbors whose coordinates are given by:(x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1).This set of pixels is called ____________
4-neighbors of p
Diagonal neighbors
8-neighbors
adjacent pixels
If an image contains K disjoint regions, what does the union of all the regions represent?
Background
Foreground
Outer Border
Inner Border
Which expression is obtained by performing the negative transformation on the negative of an image with gray levels in the range[0,L-1] ?
s=L+1-r
s=L+1+r
s=L-1-r
s=L-1+r
The histogram of a digital image with gray levels in the range [0, L-1] is represented by a discrete function:
h(rk)=nk
h(rk )=n/nk
p(rk )=nk
h(rk )=nk/n
If the histogram of same images, with different contrast, are different, then what is the relation between the histogram equalized images?
They look visually very different from one another
They look visually very similar to one another
They look visually different from one another just like the input images
None of the options are correct
The transformation s = T(r) producing a gray level s for each pixel value r of input image. Then, if the T(r) is single valued in interval 0 <=r <= 1, what does it signifies?
It guarantees the existence of inverse transformation
It is needed to restrict producing of some inverted gray levels in output
It guarantees that the output gray level and the input gray level will be in same range
All the options are correct
