coursera-gan-specialization | Programming assignments and quizzes from all courses | Machine Learning library

 by   amanchadha Jupyter Notebook Version: Current License: MIT

kandi X-RAY | coursera-gan-specialization Summary

kandi X-RAY | coursera-gan-specialization Summary

coursera-gan-specialization is a Jupyter Notebook library typically used in Artificial Intelligence, Machine Learning, Deep Learning, Pytorch, Tensorflow, Generative adversarial networks applications. coursera-gan-specialization has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Generative Adversarial Networks (GANs) are powerful machine learning models capable of generating realistic image, video, and voice outputs. Rooted in game theory, GANs have wide-spread application: from improving cybersecurity by fighting against adversarial attacks and anonymizing data to preserve privacy to generating state-of-the-art images, colorizing black and white images, increasing image resolution, creating avatars, turning 2D images to 3D, and more. As computing power has increased, so has the popularity of GANs and its capabilities. GANs have opened up many new directions: from generating high amounts of datasets for training machine learning models and allowing for powerful unsupervised learning models to producing sharper, discrete, and more accurate outputs. GANs have also informed research in adjacent areas like adversarial learning, adversarial examples and attacks, model robustness, etc.
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              coursera-gan-specialization has a low active ecosystem.
              It has 333 star(s) with 243 fork(s). There are 5 watchers for this library.
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            Community Discussions

            Trending Discussions on coursera-gan-specialization

            QUESTION

            Gradient of Image in PyTorch - for Gradient Penalty calculation in WGAN
            Asked 2022-Apr-02 at 17:11

            I am following this Github Repo for the WGAN implementation with Gradient Penalty.

            And I am trying to understand the following method, which does the job of unit-testing the gradient-penalty calulations.

            ...

            ANSWER

            Answered 2022-Apr-02 at 17:11
            For the line

            good_gradient = torch.ones(*image_shape) / torch.sqrt(image_size)

            First, note the Gradient Penalty term in WGAN is =>

            (norm(gradient(interpolated)) - 1)^2

            And for the Ideal Gradient (i.e. a Good Gradient), this Penalty term would be 0. i.e. A Good gradient is one which has its gradient_penalty is as close to 0 as possible

            This means the following should satisfy, after considering the L2-Norm of the Gradient

            (norm(gradient(x')) -1)^2 = 0

            i.e norm(gradient(x')) = 1

            i.e. sqrt(Sum(gradient_i^2) ) = 1

            Now if you just continue simplifying the above (considering how norm is calculated, see my note below) math expression, you will end up with

            good_gradient = torch.ones(*image_shape) / torch.sqrt(image_size)

            Since you are passing the image_shape as (256, 1, 28, 28) - so torch.sqrt(image_size) in your case is tensor(28.)

            Effectively the above line is dividing each element of A 4-D Tensor like [[[[1., 1. ... ]]]] with a scaler tensor(28.)

            Separately, note how norm is calculated

            torch.norm without extra arguments performs, what is called a Frobenius norm which is effectively reshaping the matrix into one long vector and returning the 2-norm of that.

            Given an M * N matrix, The Frobenius Norm of a matrix is defined as the square root of the sum of the squares of the elements of the matrix.

            Source https://stackoverflow.com/questions/71685494

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install coursera-gan-specialization

            This is the first course of the Generative Adversarial Networks (GANs) Specialization.
            Learn about GANs and their applications, understand the intuition behind the basic components of GANs, and build your very own GAN using PyTorch.
            Assignment: Your First GAN
            Build a more sophisticated GAN using convolutional layers. Learn about useful activation functions, batch normalization, and transposed convolutions to tune your GAN architecture and apply them to build an advanced DCGAN specifically for processing images.
            Assignment: Deep Convolutional GAN (DCGAN)
            Reduce instances of GANs failure due to imbalances between the generator and discriminator by learning advanced techniques such as WGANs to mitigate unstable training and mode collapse with a W-Loss and an understanding of Lipschitz Continuity.
            Assignment: Wasserstein GAN with Gradient Penalty (WGAN-GP)
            Understand how to effectively control your GAN, modify the features in a generated image, and build conditional GANs capable of generating examples from determined categories.
            Assignments: Build a Conditional GAN Controllable Generation
            This is the second course of the Generative Adversarial Networks (GANs) Specialization.
            Understand the challenges of evaluating GANs, learn about the advantages and disadvantages of different GAN performance measures, and implement the Fréchet Inception Distance (FID) method using embeddings to assess the accuracy of GANs.
            Assignment: Evaluating GANs / Fréchet Inception Distance
            Find out the disadvantages of GANs when compared to other generative models, discover the pros/cons of these models — plus, learn about the many places where bias in machine learning can come from, why it’s important, and an approach to identify it in GANs.
            Quiz: Analyzing Bias
            Assignment: Bias
            Lab: Variational Autoencoder (VAE)
            Understand how StyleGAN improves upon previous models and implement the components and the techniques associated with StyleGAN, currently the most state-of-the-art GAN with powerful capabilities
            Assignment: Components of StyleGAN
            Optional Notebooks: Components of BigGAN StyleGAN2

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