If r be the gray-level of image before processing and s after processing then which expression defines the negative transformation, for the gray-level in the range ?

If r be the gray-level of image before processing and s after processing then which expression defines the power-law transformation, for the gray-level in the range ?

A

? ] s = L – 1 – r

B

0, L-1

C

0, L-1

D

0, L-1

The power-law transformation is given as: s = crᵞ, c and ᵞ are positive constants, and r is the gray-level of image before processing and s after processing. Then, for what value of c and ᵞ does power-law transformation becomes identity transformation?

A

c = 1 and ᵞ < 1

B

c = 1 and ᵞ > 1

C

c = -1 and ᵞ = 0

D

c = ᵞ = 1

If r be the gray-level of image before processing and s after processing then which expression helps to obtain the negative of an image for the gray-level in the range ?

A

? ] s = L – 1 – r

B

0, L-1

C

0, L-1

D

0, L-1

The digitization process i.e. the digital image has M rows and N columns, requires decisions about values for M, N, and for the number, L, of max gray levels is an integer power of 2 i.e. L = 2k, allowed for each pixel. If we assume that the discrete levels are equally spaced and that they are integers then they are in the interval __________ and Sometimes the range of values spanned by the gray scale is called the ________ of an image. and static range respectively b) and dynamic range respectively c) and static range respectively d) and dynamic range respectively

A

and static range respectively

B

0, L – 1

C

0, L – 1

D

0, L – 1

Which expression is obtained by performing the negative transformation on the negative of an image with gray levels in the range ?

A

? ] s=L+1-r

B

0,L-1

C

0,L-1

D

0,L-1

Let x(t) and y(t) (with Fourier transforms X(f) and Y(f) respectively) be related as shown in the figure. Then Y(f) is
Signal Processing mcq question image

A

$$ - \frac{1}{2}X\left( {\frac{f}{2}} \right){e^{ - j2\pi f}}$$

B

$$ - \frac{1}{2}X\left( {\frac{f}{2}} \right){e^{j2\pi f}}$$

C

$$ - X\left( {\frac{f}{2}} \right){e^{j2\pi f}}$$

D

$$ - X\left( {\frac{f}{2}} \right){e^{ - j2\pi f}}$$

The power-law transformation is given as: s = crᵞ, c and ᵞ are positive constants, and r is the gray-level of image before processing and s after processing. What happens if we increase the gamma value from 0.3 to 0.7?

A

The contrast increases and the detail increases

B

The contrast decreases and the detail decreases

C

The contrast increases and the detail decreases

D

The contrast decreases and the detail increases

A contrast stretching result been obtained by setting (r1, s1) = (rmin, 0) and (r2, s2) = (rmax, L – 1), where, r and s are gray-values of image before and after processing respectively, L is the max gray value allowed and rmax and rmin are maximum and minimum gray-values in image respectively. What should we term the transformation function if r1 = r2 = m, some mean gray-value.

A

Linear function

B

Thresholding function

C

Intermediate function

D

None of the mentioned

Consider a system whose input r and output y are related by the equation $$y\left( t \right) = \int\limits_{ - \infty }^\infty {x\left( {t - \tau } \right)} h\left( {2\tau } \right)d\tau $$
Signal Processing mcq question image

Where h(t) is shown in the graph
Which of the following four properties are possessed by the system? BIBO: Bounded input gives a bounded output
Causal: The system is causal.
LP : The system is low pass.
LTI: The system is linear and time-invariant.

A

Causal, LP

B

BIBO, LTI

C

BIBO, Causal, LTI

D

LP, LTI

The magnitude and phase of the complex Fourier series coefficient a_k of a periodic signal x(t) are shown in the figure. Choose the correct statement from the four choices given. Notation: C is the set of complex number, R is the set of purely real numbers, and P is the set of purely imaginary numbers.
Signal Processing mcq question image

A

$$x\left( t \right) \in R$$

B

$$x\left( t \right) \in P$$

C

$$x\left( t \right) \in \left( {C - R} \right)$$

D

The information given is not sufficient to draw any conclusion about x(t)

If r be the gray-level of image before processing and s after processing then which expression defines the negative transformation, for the gray-level in the range ?

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