Image Transformation - Image Processing and Analysis - Geomatics Engineering Previous Year Questions

1

2024 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2024

_____ is a raster image resampling technique that DOES NOT alter any of the output cell values from the input raster dataset.

A

Nearest neighbor

B

Cubic convolution

C

Bilinear

D

Kriging

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2

2024 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2024

The figure given below shows the Fourier spectrum obtained by applying filter on a remote sensing image in frequency domain. Zone A represents the location of _____ components.

A

low frequency

B

mid frequency

C

mid to high frequency

D

high frequency

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3

2024 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2024

Which of the following statements about Principal Component Analysis (PCA) is/are CORRECT?

A

A two-dimensional data set can have up to four principal components.

B

The first principal component accounts for the majority of conceivable data variation.

C

The second principal component attempts to encapsulate the mode of the data.

D

The transformed principal components are linear combinations of the original variables and are orthogonal.

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4

2024 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2024

Which of the following statements about image ratio is/are CORRECT?

A

It cannot be used to suppress the effects of topography

B

It cannot be used to suppress the effects of differential sun-illumination

C

It helps in suppressing the effects of differential sun-illumination

D

It helps in suppressing the effects of topography

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5

2025 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2025

The hue, intensity and saturation values for a pixel are \( H = 0.5 \) rad, \( S = 0.5 \) and \( I = 0.3 \), respectively. If the pixel is converted to RGB color model, then the value of the green pixel would be _____ (rounded off to 2 decimal places).

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6

2022 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2022

In case of Principal Component Analysis (PCA), the variance of a single variable expresses the spread of its values about the

A

Mode

B

Median

C

Mean

D

Standard Deviation

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7

2022 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2022

Choose the CORRECT statement(s).

A

Higher frequencies in an original image predominantly appear around the center of its Fourier Spectrum.

B

Higher frequencies in an original image predominantly appear progressively along the outer edge of its Fourier Spectrum.

C

Horizontal features in an original image appear as vertical components in its Fourier Spectrum.

D

Vertical features in an original image appear as vertical components in its Fourier Spectrum.

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8

2022 · Geomatics Engineering · Image Processing and Analysis · Image Transformation

Geomatics Engineering (GE) 2022

Band ratio in satellite images interpretation is applied to

A

enhance the spectral separation

B

reduce the effects of topography

C

enhance the effects of topography

D

increase spatial differences between bands

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