Which of the following function cannot be a histogram equalization function.
a) f(x) = 3*
b) f(x) = 5-x
c) f(x) = 2x+7
d) f(x) = exp(x)
Which process is used to correct the power-law response?
a) Alpha Correction
b) Gamma correction
c) Luminance Correction
d) None of the above
Log transformation is given by which formula
a) sc log(|r| 1), where c is the scaling constant and r is the input intensity.
b) s = log(1[r]), where r is the input intensity.
c) s = c log(r), where c is the scaling constant and r is the input intensity.
d) sc log(1+[r]), where c is the scaling constant and r is the input intensity.
Which of the following is TRUE, for power law transformation?
T(r) = cry
Where, c and y are positive constants and r is the input intensity
a) y < 1 =>Narrow range of dark input values is mapped into wider range of values and wide range of high intensity values is mapped into narrow range of values
b) y > 1 =>Narrow range of dark input values is mapped into wider range of values and wide range of high intensity values is mapped into narrow range of values
c) y < 1 =>Narrow range of dark input values is mapped into narrow range of values and wide range of high intensity values is mapped into wider range of values
d) None of the above.
For decoding a K L Transformed image at the receiver side, we require
a) Transformed image
b) Transformation matrix
c) Original Image
d) Both Transformed image and transformation matrix.
Which of the following statement is (are) TRUE for KL Transform?
I. No fast computational algorithms are available for its implementation.
II. Transformation matrix is image independent.
III. KL Transform is optimum in the sense that it minimizes mean square error between x and x, where x is the original vector and is the reconstructed vector.
IV. Only transformed matrix is sufficient for inverse K-L transform at receiver.
a) Only I
b) Only I, III
c) Only I, II, IV
d) Only I, II and III
For the following vectors, find the transformation matrix A, for K-L transform
1
a) A √21
b) A=
c) A= 0
d) A= 1 3 1 √10 1 -1
Which of the following can result in forming low contrast image?
a) Poor illumination of the scene to be photographed.
b) Lack of dynamic range of imaging sensor used for image aquisition.
c) Wrong setting of lens aperture during image acquisition.
d) All of the above
For the following vectors, find the transformation matrix A, for K-L transform.
0000 and 1 2 (3 6 8 5 10
G
a) 4 = ( ) A
b) A = (1 )
(41) 4 = (1
d) All of the above
Which of the following are true about Image Negative in image enhancement operation?
i. Image Negative operation produces image equivalent to a photographic negative.
ii. It is used to increase the dynamic range of gray levels images.
111. S = T(r) = L-r -1.
a) Only I
b) Only II
c) Only I and III
d) I, II and III