Introduction to Computer Vision and Image Processing Week 3

Course Name: Introduction to Computer Vision and Image Processing

Course Link: Introduction to Computer Vision and Image Processing

These are answers of Introduction to Computer Vision and Image Processing Week 3 Quiz

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Practice Assessment

Q1. You select the learning rate
Using the validation data
The learning rate should always be one
Randomly

Answer: Using the validation data

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Q2. Support Vector Machines for Image classification may use kernels. There are different types of Kernels, which of the following is not a type of Kernel?
Polynomial
Linear
Histogram of Oriented Gradients
Radial Basis Function

Answer: Histogram of Oriented Gradients

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Q3. The difference between Logistic Regression and Softmax is
Softmax is used for Multi-class Classification
only Logistic Regression has probabilistic outputs
they are the same

Answer: Softmax is used for Multi-class Classification

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These are answers of Introduction to Computer Vision and Image Processing Week 3 Quiz

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Q4. Other methods to convert a two-class classifier to multiclass classifier they include
One-vs-rest
One-vs-one
support vector machines (SVM)

Answer: One-vs-rest, One-vs-one

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Q5. What methods can you use for Multiclass classification with no alteration
Logistic Regression
k-nearest neighbors
Support Vector Machines
Softmax

Answer: k-nearest neighbors, Softmax

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These are answers of Introduction to Computer Vision and Image Processing Week 3 Quiz

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Graded Quiz

Q1. You train a Support Vector Machine and obtain an accuracy of 100% on the training data and 50% on the validation data. This is an example of:
Overfitting
Underfitting
A good model

Answer: Overfitting

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Q2. When dealing with image classification, what kind of challenges do we face with images?
Variations due to scaling
Variations due to illumination
Image occlusion.
All of the above

Answer: All of the above

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These are answers of Introduction to Computer Vision and Image Processing Week 3 Quiz

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Q3. Support Vector Machines for Image classification may use a kernels. There are different types of Kernels, which of the following is not a type of Kernel?
Linear
Polynomial
Radial Basis Function
Histogram of Oriented Gradients

Answer: Histogram of Oriented Gradients

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Q4. In a sequence of array, what does the argmax function return?
It will return 0
The sequence of array in ascending order
The index corresponding to the minimum value
The index corresponding to the maximum value

Answer: The index corresponding to the maximum value

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Q5. You train a Support Vector Machine with a RBF kernel and obtain an accuracy of 100% on the training data and 50% on the validation data. What should you do to the parameter Gamma?
Increase Gamma
Decrease Gamma
Leave Gamma unchanged

Answer: Decrease Gamma

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These are answers of Introduction to Computer Vision and Image Processing Week 3 Quiz

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