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Correct CHOICE is (B) PHOTODIODE

The EXPLANATION: Photodiode is the most commonly used single sensor made up of silicon materials.

Right answer is (d) [0, L – 1] and dynamic range respectively

The explanation is: In DIGITIZATION process M rows and N columns have to be positive and for the number, L, of discrete gray levels typically an integer power of 2 for each pixel. If we ASSUME that the discrete levels are equally spaced and that they are integers then they lie in the interval [0, L-1] and Sometimes the range of values spanned by the gray scale is called the dynamic range of an IMAGE.

The correct ANSWER is (a) An INTEGER POWER of 2 i.e. L = 2k

For explanation: Due to processing, storage, and considering the sampling hardware, the NUMBER of gray levels typically is an integer power of 2 i.e. L = 2k.

Right ANSWER is (C) Reseau MARKS

Explanation: These points are called “known” points or “Reseau marks”.

The CORRECT CHOICE is (b) SPATIAL domain

The explanation: OPERATIONS directly on pixels of INPUT image work directly in Spatial Domain.

The CORRECT OPTION is (a) OR

The EXPLANATION: This is CALLED an OR OPERATION.

Right ANSWER is (C) Subset

Easiest explanation: A is CALLED the subset of B.

Correct answer is (B) Masking

To explain I would say: A COMMON use of image MULTIPLICATION is Masking, also CALLED ROI operation.

The correct answer is (c) SUBTRACTION

To explain: A FREQUENT APPLICATION of IMAGE subtraction is in the enhancement of DIFFERENCES between images .

Right option is (a) Mask MODE radiography

Explanation: Mask mode radiography is an IMPORTANT medical imaging area based on Image SUBTRACTION.

The CORRECT answer is (C) HOMOGENEITY

To explain: This property is CALLED homogeneity .

Correct CHOICE is (B) PIXEL by pixel

For EXPLANATION: Any array operation is CARRIED out on a pixel by pixel basis.

Right OPTION is (b) Brightness

Explanation: Brightness embodies the ACHROMATIC notion of INTENSITY and is a KEY factor in DESCRIBING color sensation.

The CORRECT answer is (B) Monochromatic light

Explanation: ACHROMATIC light is ALSO called monochromatic light.(Light VOID of color)

The correct option is (a) Photon

To EXPLAIN I WOULD say: Each bundle of massless energy is CALLED a Photon.

The correct ANSWER is (d) Brightness

Explanation: Brightness is subjective DESCRIPTOR of light perception that is impossible to MEASURE.

Correct option is (b) watts

The EXPLANATION: RADIANCE is the TOTAL amount of ENERGY that flows from the light source and is measured in Watts.

The CORRECT ANSWER is (a) sine wave

For EXPLANATION I would SAY: Electromagnetic waves are visualised as sinusoidal wave.

Correct choice is (b) GAMMA RAYS

Explanation: Gamma Rays come first in the electromagnetic SPECTRUM sorted in the decreasing order of frequency.

The correct ANSWER is (d) Single PIXEL Operation

The EXPLANATION is: It is expressed as a transformation function T, of the FORM s=T(z) , where z is the intensity.

The correct ANSWER is (C) PIXELATION

The BEST I can explain: Because Pixelation deals with enlargement of pixels.

Right OPTION is (a) Spacial Domain

The best EXPLANATION: The section of the REAL plane SPANNED by the COORDINATES of an image is called the Spacial Domain, with the x and y coordinates referred to as Spacial coordinates.

Right answer is (c) False Contouring

The explanation is: It is CALLED so because the RIDGES RESEMBLE the contours of a MAP.

The CORRECT CHOICE is (d) Computerised Axial TOMOGRAPHY

Easy explanation: Industrial Computerised Axial Tomography is based on image acquisition using sensor STRIPS.

Correct choice is (b) nearest neighbour interpolation

Easy explanation: Bilinear interpolation is where the FOUR NEIGHBOURING PIXELS is used to estimate intensity for a NEW LOCATION.

Correct option is (d) NEAREST NEIGHBOUR INTERPOLATION

To elaborate: Its called as Nearest Neighbour Interpolation since for each new location the INTENSITY of the next neighbouring pixel is assigned.

The correct choice is (B) Interpolation

Explanation: Interpolation is the BASIC TOOL used for zooming, shrinking, rotating, etc.

Right option is (a) Intensity Resolution

Easiest explanation: Number of BITS used to quantise intensity of an IMAGE is CALLED intensity resolution.

The CORRECT option is (C) False Contours

The best explanation: This effect arises when the number brightness levels is LOWER that which the human EYE can distinguish.

The correct OPTION is (a) QUANTISATION

The explanation is: The transition between CONTINUOUS VALUES of the image function and its digital equivalent is called Quantisation.

Right option is (d) SAMPLING

For explanation: The sampling POINTS are ORDERED in the plane and their relation is called a GRID.

The correct OPTION is (B) 4096

To elaborate: In digital image of M rows and N COLUMNS and L max gray levels i.e. an integer power of 2 for each pixel. The NUMBER, b, of bits required to store a DIGITIZED image is: b=M*N*k.

For L=16, k=4.

i.e. b=4096.

Correct OPTION is (a) True

The BEST explanation: In an IMAGE if an appreciable NUMBER of pixels exhibit high dynamic range property, the image will have high contrast.

Correct OPTION is (B) HIGH and LOW respectively

To elaborate: An image whose gray-levels SIGNIFIES a large portion of gray scale have High dynamic range, while that with dull, washed out gray look have Low dynamic range.

The correct answer is (a) b=M*N*K

Easiest EXPLANATION: In digital image of M rows and N columns and L max gray LEVELS an integer power of 2 for each pixel. The number, b, of bits REQUIRED to store a digitized image is: b=M*N*k.

Correct answer is (a) M and N have to be positive integer

To elaborate: 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 level. There are no requirements on M and N, other than that M and N have to be positive integer.

Right option is (a) The Digital image then becomes a 2-D function whose COORDINATES and AMPLITUDE values are integers

Explanation: In Quantization PROCESS if the gray levels also are integers the Digital image then becomes a 2-D function whose coordinates and amplitude values are integers.

Right answer is (d) (x, y) are integers from Z2 and f is a function that assigns a gray-level value (from R) to each distinct PAIR of COORDINATES (x, y)

Easy explanation: In the given condition, f(x, y) is a digital image if (x, y) are integers from Z2 and f a function that assigns a gray-level value (that is, a real NUMBER from the set R) to each distinct coordinate pair (x, y).