WorksheetsIMAGE PROCESSING 2
Total questions: 50
Worksheet time: 25mins
A_________shows the number of pixels (y-axis) that have a particular value, for all possible pixel values (x-axis).
filter process
point process
Histogram
Spatial Filtering
A pixel's grey value is changed without any knowledge of its surrounds.
filter process
point process
Histogram
Spatial Filtering
To change the grey level of a given pixel we need only know the value of the grey levels in a small neighborhood of pixels around the given pixel.
filter process
point process
Histogram
Spatial Filtering
A process that moves a subimage from point to point in an image, with the response at each image point predefined.
filter process
point process
Histogram
Spatial Filtering
When using image filtering the subimage called
filter
mask
coefficients
matrix
When using image filtering the values of subimage called
filter
mask
coefficients
matrix
The process of image filtering in spacial domain called
covariance
convolution
summation
integration
When using image Linear filtering the process might bring the intensity outside the display range, so we have to
Delete values
Clip values
Scaling transformation values
Some filters can be implemented by successive application of two simpler filters.
True
False
for image a measure of the amount by which gray values change with distance.
gray level
frequency
high frequency
low frequency
for image a small changes in gray values over small distances.
gray level
frequency
high frequency
low frequency
for image edges considered as
gray level
frequency
high frequency
low frequency
Based on the given function in equation 1, determine the output pixel (highlighted pixel) for the given grayscale image?
s = intensitymax - r -- > (1)
14
200
241
240
Which of the following expression is used to denote spatial domain filtering process?
g(xy)=T[f(xy)]
f(x+y)=T[g(x+y)]
g(x,y)=T[f(x,y)]
All of the above
In contrast stretching, if r1 =s1 and r2 =s2 then which of the following is true?
The transformation is not a linear function that produces no changes in gray levels
The transformation is a linear function that produces no changes in gray levels
The transformation is a linear function that produces changes in gray levels
The transformation is not a linear function that produces changes in gray levels
What is the set of pixels of 8-neighbors of pixel p at coordinates (x, y)?
(x+1, y), (x-1, y), (x, y+1), (x-1, y-1), (x+1, y), (x-1, y), (x-1, y+1), (x-1, y-1)
(x+1, y), (x-1, y), (x, y+1), (x, y-1), (x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1)
(x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1), (x+2, y+2), (x+2, y-2), (x-2, y+2), (x-2, y-2)
(x+2, y), (x-2, y), (x, y+2), (x, y-2), (x+2, y+2), (x+2, y-2), (x-2, y+2), (x-2, y-2)
Power law transformation is useful in
purification
none
radar
MRI image display
In a dark image, the components of histogram are concentrated on which side of the gray scale?
High
Medium
Low
Evenly distributed
Decomposing an image into 1-bit planes is
contrast slicing
intensity slicing
bit plane slicing
gray plane slicing
Spatial filter consists of neighbourhood & predefined filtering operation
True
False
Smoothing linear filters
identifies and highlights sharp transitions
reduces sharp transitions in image intensities
removes pixels with high intensities
removes pixels with lower intensities
1.Dark characteristics in an image are better solved using ____________________.
a) Laplacian Transform
b) Gaussian Transform
c) Histogram Specification
d) Power-law Transformation
2. Which of the following fails to work on dark intensity distributions?
a) Laplacian Transform
b) Gaussian Transform
c) Histogram Equalization
d) Power-law Transformation
3. An alternate approach to median filtering is ______________
a) Use a mask
b) Gaussian filter
c) Sharpening
d) Laplacian filter
4. Which of the following is the primary objective of sharpening of an image?
a) Blurring the image
b) Highlight fine details in the image
c) Increase the brightness of the image
d) Decrease the brightness of the image
Which of the following color possess the longest wavelength in the visible spectrum?
Yellow
Red
Blue
Violet
Blurring an image with the help of a smoothing filter may lead to noise reduction.
True
False
What is the output of a smoothing, linear spatial filter?
Median of pixels
Maximum of pixels
Minimum of pixels
Average of pixels
Smoothing filter is used to remove __________ from an image.
Smooth transitions of brightness levels
Smooth transitions of gray levels
Sharp transitions of brightness levels
Sharp transitions of gray levels.
The technique of Enhancement that has a specified Histogram processed image, as a result, is called?
Histogram Linearization
Histogram Equalization
Histogram Matching
None of the above
The Euclidean Distance between a point p with co-ordiantes (0,0) and a point q with coordinates (3,3) is
sqrt(18)
18
9
3
How does picture formation in the eye vary from image formation in a camera?
Fixed focal length
Varying distance between lens and imaging plane
No difference
Variable focal length
What is Digital Image Processing?
It’s an application that alters digital videos
It is the processing digital images by means of a digital computer.
It’s a system that manipulates digital medias
It’s a machine that allows altering digital images
What are the categories of digital image processing?
Image Enhancement
Image Classification and Analysis
Image Transformation
All of the mentioned
Which of the following is the first and foremost step in Image Processing?
Image acquisition
Segmentation
Image enhancement
Image restoration
What is digital image processing?
Enhancing a dark image by making it brighter.
Reducing the size of an image.
Removing imperfections by restoration techniques.
All of the above.
Which digital imaging process takes place when an image's visual appearance is improved
Manipulation
Restoration
Enhancement
Compression
When the file size of an image is reduced but the quality remains the same, this means that the compression format used is
Lossy
Loseless
lossless
loose
Which digital imaging process is used here?
Enhancement
Manipulation
Restoration
Compression
The Euclidean Distance between a point p with co-ordiantes (0,0) and a point q with coordinates (3,3) is
sqrt(18)
18
9
3
Digital imaging is done using
Gamma rays
X-rays
UV/IR rays
visible light
All the above
•Histogram Equalization is a process in which
a) a histogram is created
b) the contrast of an image is adjusted by using its histogram.
c) An equal size histogram for an image is created.
d) the pixel values are increased.
Typically, a .jpg file will be a larger file than a .txt file
True
False
Black and white pixels of image are represented in matrix as
1 and 2
0 and 1
0 and 2
0 and -1
Identify the common file formats for raster images:
.html, .htm
.svg, .eps, .xml
.doc, .ppt, .xls
.bmp, .jpg, .gif, .jpeg
