Quiz 1

What operation brightens an image matrix?

• Scalar multiplication

• Matrix inverse

• Matrix determinant

• Matrix transpose

Eigenvalues are associated with which matrix property?

• Transformation scaling

• Zero matrix

• Diagonal elements

• Rank

PCA stands for:

• Principal Component Analysis

• Principal Calculation Analysis

• Projected Component Architecture

• Predictive Classification Algorithm

What is the effect of increasing pixel values using matrix addition?

a)Darkening

What is the effect of increasing pixel values using matrix addition?b)Color inversion

c)No effect

d)Brightening

• Brightening

• Darkening

• Color inversion

• No effect

The eigen values of a covariance matrix from a censored data are 2,5 and 1. Identify the eigen value corresponding to first principal component.

• 5

• 2

• 1

• 3

The matrix formed from a grayscale image is:

• Polynomial

• Boolean

• 2D numerical array

• Vector

In PCA, eigenvectors are used to:

• Identify principal directions

• Find the mean of the data

• Shrink matrix size

• Eliminate noise

What type of matrix is often used in PCA after centering data?

• Transition matrix

• Covariance matrix

• Laplacian matrix

• Adjacency matrix

Which operation enhances contrast in image processing?

• Transpose

• Trace calculation

• Matrix inversion

• Scalar multiplication

Which concept helps reduce the number of features in high-dimensional data?

• Eigenvalue filtering

• Eigenvalue filtering

• Principal Component Analysis (PCA)

• Matrix rotation