CV 2
to extract information from image ( or video ) We need all the following except :
Image or video
Sensing Device
Interpreting Device
Object Detector
Which of one these are Uses Of Computer Vision ……………….
Image Captioning
Biometric Scanning
Surveillance and security
All the above
Using Computer vision we can ……..
Detect Faces
Track persons
Do automations
All the above.
Which one of the following does not constitute a fundamental task in the field of computer vision?
Object detection
Image classification
Speech recognition
Image segmentation
………….. Is the process of finding instances of objects in images.
Object detection
Object classification
Object recognition
Object Verification
Assists in categorizing the contents present within an image.
Image Classifier
Image Segmentation
Image Localization
Image Classification
is the task of taking an input image and outputting a class or probability of classes that best describes the image
Image Classification
Image Segmentation
Image Localization
Object Detection
The object of interest may blend into their environment making them hard to identify
Occlusion
Background intersection
Background Clutter
Deformation
.......... Process we remove noise and Sharpen Images
High level
Low level
Mid level
Image Processing
The goal is to recognize objects and provide useful information on it
Computer Vision
Image Recognition
Image Classification
Image Detection
Is the algorithm needs to know the position of a user and the position of all the objects around as the user moves every thing is updated smoothly
Augmented Reality
Virtual Reality
A and B
None of the above
Cv is the same process of computer graphics
True
False
Object recognition Can be Approached through Machine learning or Deep learning
True
False
Deep Learning offers High accuracy but we need a few amount of data
True
False
Machine learning needs a powerful GPU and a lots of labeled training Images
True
False
We use supervised learning if we have known data for the output “Trying to predict”
True
False
image processing works as a post processing step in Computer vision
True
False
What is the critical step in most recognition applications?
Preprocessing
Feature extraction
Feature selection
Reduction
Saying that the color histogram is centered at the left region means that …….
the entire image is bright
The entire image is dark
the entire image is green
None of them
What is the goal of feature selection and reduction in image recognition?
To increase the number of features.
To minimize the probability of assigning wrong labels.
To remove the background from the image.
To obtain an optimal feature subset.
Which type of features should be included in a feature vector for image recognition?
Irrelevant features
Correlated features
Noise features
Representative features
Why is feature extraction preferred before training in image recognition?
To reduce the number of input variables
To increase the accuracy of the model
To handle different types of objects in the image
To speed up the training process
Which of the following features are typically considered as global features in image recognition?
Edge detection
Texture analysis
Color histogram
Key Points
What is the primary focus of local features in image recognition?
Background removal
Color extraction
Edge detection
Noise reduction
The number of inputs across the entire dataset is equal to the product of the number of samples and the number of input variables.
True
False
Global features are focused on a specific something within the image such as the edges.
True
False
Features extracted from images can only be categorized globally, not locally.
True
False
Feature extraction eliminates the need for selecting the most representative set of features.
True
False
Preprocessing is a step that maximizes the probability of successful recognition.
True
False
Which of the following statistical measures can be extracted from the Gray-Level Co-Occurrence Matrix (GLCM)?
Mean and standard deviation
Skewness and kurtosis
Dissimilarity and homogeneity
Entropy and mode
In GLCM, if the distance between two intensity levels is increased, how does it affect the co-occurrence count?
The co-occurrence count decreases.
The co-occurrence count increases.
The co-occurrence count remains the same.
The co-occurrence count is not affected by the distance.
Which of the following is NOT a step in calculating the GLCM?
Converting the image into a binary image
Finding the total number of intensity levels in the image
Creating an LxL matrix for the GLCM
Selecting the appropriate parameters of the GLCM (D, θ)
How can the size of the GLCM matrix be reduced to decrease the length of the feature vector?
By reducing the intensity levels in the image
By applying a median filter to the GLCM matrix
By extracting statistical features from the GLCM matrix
By converting the GLCM matrix into a grayscale image
Which of the following statements about Histogram of Oriented Gradients (HOG) is true?
HOG is primarily used for color-based analysis.
HOG calculates the frequency of intensity levels in an image.
HOG is a feature descriptor used for edge detection
HOG is based on GLCM and calculates the co-occurrence count between intensity levels.
GLCM is an effective method for analyzing color histograms in images.
True
False
GLCM is a spatial-based method that considers the arrangement of pixels in an image.
True
False
GLCM is an efficient technique for edge detection in computer vision.
True
False
GLCM normalization ensures that all elements in the matrix are scaled between 0 and 255.
True
False
HOG is a feature descriptor that quantifies the frequency of intensity levels in an image.
True
False
How does information flow in a feed-forward neural network?
Bidirectional
Unidirectional
No specific direction
Only backward
What is the purpose of the activation function in a neural network?
To calculate the weighted sum
To decide if a neuron should be activated
To determine the number of layers
To adjust the network's weights
What is the purpose of backpropagation in training a neural network?
Forward signal propagation
Initializing network layers
Activating hidden layers
Adjusting weights to reduce cost value
Which type of neural network is known for considering the distance of a point with respect to the center?
Self Organizing Neural Network (SOM)
Modular Neural Network (MNN)
Radial Basis Function Neural Network (RBFNN)
Feedforward Neural Network (FNN)
Which neural network type is best suited for problems with sequential data, such as time series?
Self Organizing Neural Network (SOM)
Recurrent Neural Network (RNN)
Radial Basis Function Neural Network (RBFNN)
Convolutional Neural Network (CNN)
The primary goal of training a neural network is to maximize the cost value until the model's accuracy is satisfactory
True
False
Feedforward Neural Network (FNN) is characterized by the absence of loops in the network.
True
False
Object recognition in images is a problem that neural networks excel at due to their ability to handle highly complex patterns.
True
False
The purpose of the hidden layers in a neural network is to directly produce the final output.
True
False
The local minimum problem in neural networks refers to the challenge of finding the smallest possible input values during training.
True
False
What are the three pillars essential for a successful ML application?
Algorithm, Labels, Output
Data, Features, Model
Complexity, Scale, Rotation
Color, Texture, Edge
Why are representative features considered critical in building an accurate computer vision (CV) application?
They add complexity to the model.
They work well only under specific conditions.
They capture color changes among classes.
They reduce the need for feature selection.
Why is it advised not to use more features than needed in a machine learning model?
To increase model complexity
To enhance accuracy
To minimize feature vector length
To reduce model complexity
What is the primary purpose of feature selection and reduction techniques?
To increase the number of features
To find the maximum set of features
To minimize model accuracy
To find the minimum set of features for an accurate model
One of the ways to reduce the number of input features is
Adding more RGB channels
Using all available channels
Using a single channel instead of all three RGB channels
Increasing the dataset complexity
Increasing the dataset complexity Trying to find ways to reduce the number of input features emphasizes the goal of decreasing model complexity and associated parameters.
True
False
Histograms make it more challenging to visualize intensity values compared to directly looking at the image.
True
False
Feature selection aims to find all possible relevant features.
True
False
Feature reduction is a useful strategy for simplifying models and avoiding overfitting in machine learning applications.
True
False
Feature selection minimizes complexity by identifying the minimum set for accurate ML models
True
False
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