Digital Image Processing Second Order Derivative Enhancement Online Exam Quiz
Digital Image Processing Second Order Derivative Enhancement GK Quiz. Question and Answers related to Digital Image Processing Second Order Derivative Enhancement. MCQ (Multiple Choice Questions with answers about Digital Image Processing Second Order Derivative Enhancement
A Laplacian for an image f(x, y) is defined as: is given by ________
Options
A : [f(x + 1, y) + f(x – 1, y) – 2f(x, y)] and [f(x, y + 1) + f(x, y – 1) – 2f(x, y)] respectively
B : [f(x + 1, y + 1) + f(x, y – 1) – 2f(x, y)] and [f(x , y + 1) + f(x – 1, y) – 2f(x, y)] respectively
C : [f(x, y + 1) + f(x, y – 1) – 2f(x, y)] and [f(x + 1, y) + f(x – 1, y) – 2f(x, y)] respectively
D : None of the mentioned
A mask of size 3*3 is formed using Laplacian including diagonal neighbors that has central coefficient as 9. Then, what would be the central coefficient of same mask if it is made without diagonal neighbors?
Options
A : 5
B : -5
C : 8
D : -8
The Laplacian ?2 f=[f(x + 1, y) + f(x – 1, y) + f(x, y + 1) + f(x, y – 1) – 4f(x, y)], gives an isotropic result for rotations in increment by what degree?
Options
A : 90o
B : 0o
C : 45o
D : None of the mentioned
The Laplacian incorporated with diagonal directions, i.e. ?2 f=[f(x + 1, y) + f(x – 1, y) + f(x, y + 1) + f(x, y – 1) – 8f(x, y)], gives an isotropic result for rotations in increment by what degree?
Options
A : 90o
B : 0o
C : 45o
D : None of the mentioned
Which of the following gives an expression for high boost filtered image fhb, if f represents an image, f blurred version of f, fs unsharp mask filtered image and A ? 1?
Options
A : fhb = (A – 1) f(x, y) + f(x, y) – f x, y)
B : fhb = A f(x, y) – f(x,y)
C : fhb = (A – 1) f(x, y) + fs(x, y)
D : All of the mentioned
If we use a Laplacian to obtain sharp image for unsharp mask filtered image fs(x, y) of f(x, y) as input image, and if the center coefficient of the Laplacian mask is negative then, which of the following expression gives the high boost filtered image fhb, if ?2 f represent Laplacian?
Options
A : fhb = A f(x, y) – ?2 f(x,y)
B : fhb = A f(x, y) + ?2 f(x,y)
C : fhb = ?2 f(x,y)
D : None of the mentioned
Applying Laplacian produces image having featureless background which is recovered maintaining the sharpness of Laplacian operation by either adding or subtracting it from the original image depending upon the Laplacian definition used. Which of the following is true based on above statement?
Options
A : If definition used has a negative center coefficient, then subtraction is done
B : If definition used has a positive center coefficient, then subtraction is done
C : If definition used has a negative center coefficient, then addition is done
D : None of the mentioned
A filter is applied to an image whose response is independent of the direction of discontinuities in the image. The filter is/are ________
Options
A : Isotropic filters
B : Box filters
C : Median filter
D : All of the mentioned
In isotropic filtering, which of the following is/are the simplest isotropic derivative operator?
Options
A : Laplacian
B : Gradient
C : All of the mentioned
D : None of the mentioned
The Laplacian is which of the following operator?
Options
A : Nonlinear operator
B : Order-Statistic operator
C : Linear operator
D : None of the mentioned
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