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## Is the brain a generative model?

Under this view, **our brains possess an internal (generative) model of our environment** that we use to predict sensory data, and to explain current data in terms of their causes (Friston et al., 2006).

## Where are GANs used?

**Other use cases of GAN could be:**

- Text-to-Image Translation.
- Face Frontal View Generation.
- Generate New Human Poses.
- Photos to Emojis.
- Face Aging.
- Super Resolution.
- Photo Inpainting.
- Clothing Translation.

## What can generative adversarial networks be used for?

Generative adversarial networks can be used for **translating data from images**. GANs can be utilized for image-to-image translations, semantic image-to-photo translations, and text-to-image translations.

## Are GANs part of deep learning?

**Generative Adversarial Networks, or GANs, are a deep-learning-based generative model**. More generally, GANs are a model architecture for training a generative model, and it is most common to use deep learning models in this architecture.

## Are GANs only for images?

**Not all GANs produce images**. For example, researchers have also used GANs to produce synthesized speech from text input.

## Why do we need GANs?

The main goal of GANs is **to learn from a set of training data and generate new data with the same characteristics as the training data**. It is composed of two neural network models, a generator and a discriminator.

## What is GAN neural network?

A generative adversarial network (GAN) is **a machine learning (ML) model in which two neural networks compete with each other to become more accurate in their predictions**. GANs typically run unsupervised and use a cooperative zero-sum game framework to learn.

## Who created GANs?

Ian Goodfellow

A generative adversarial network (GAN) is a class of machine learning frameworks designed by **Ian Goodfellow and his colleagues** in June 2014. Two neural networks contest with each other in a game (in the form of a zero-sum game, where one agent’s gain is another agent’s loss).

## What is vanilla GAN?

Vanilla GAN: This is **the simplest type GAN**. Here, the Generator and the Discriminator are simple multi-layer perceptrons. In vanilla GAN, the algorithm is really simple, it tries to optimize the mathematical equation using stochastic gradient descent.

## What is the difference between CNN and GAN?

Both the FCC- GAN models learn the distribution much more quickly than the CNN model. A er ve epochs, **FCC-GAN models generate clearly recognizable digits, while the CNN model does not**. A er epoch 50, all models generate good images, though FCC-GAN models still outperform the CNN model in terms of image quality.

## Can GANs be use for data augmentation?

**Generative Adversarial Networks (GANs) are a data augmentation technique that produce NEW data samples**. GANs take random noise from a latent space and produce unique images that mimic the feature distribution of the original dataset.

## Is GAN supervised or unsupervised?

GANs are **unsupervised** learning algorithms that use a supervised loss as part of the training.

## Is VAE a CNN?

For VAE, **Convolutional Neural networks (CNN) based VAE is used**.

## What does an Autoencoder do?

An autoencoder is an unsupervised learning technique for neural networks that **learns efficient data representations (encoding) by training the network to ignore signal “noise.”** Autoencoders can be used for image denoising, image compression, and, in some cases, even generation of image data.

## What is conditional VAE?

Conditional Variational Autoencoder (CVAE) is **an extension of Variational Autoencoder (VAE), a generative model** that we have studied in the last post. We’ve seen that by formulating the problem of data generation as a bayesian model, we could optimize its variational lower bound to learn the model.

## What is convolutional variational Autoencoder?

Unlike a traditional autoencoder, which maps the input onto a latent vector, a VAE **maps the input data into the parameters of a probability distribution, such as the mean and variance of a Gaussian**. This approach produces a continuous, structured latent space, which is useful for image generation.

## What is the difference between traditional Autoencoder and variational Autoencoder?

The encoder in the AE outputs latent vectors. Instead of outputting the vectors in the latent space, the encoder of VAE outputs parameters of a pre-defined distribution in the latent space for every input. The VAE then imposes a constraint on this latent distribution forcing it to be a normal distribution.

## How do you build a variational Autoencoder?

**Simple Steps to Building a Variational Autoencoder**

- Build the encoder and decoder networks.
- Apply a reparameterizing trick between encoder and decoder to allow back-propagation.
- Train both networks end-to-end.

## Which of the following is one of the pros of variational Autoencoder?

The main benefit of a variational autoencoder is that we’re **capable of learning smooth latent state representations of the input data**. For standard autoencoders, we simply need to learn an encoding which allows us to reproduce the input.

## Why is Reparameterization trick done?

So in short, the reparameterization trick **allows us to restructure the way we take the derivative of the loss function so that we can take its derivative and optimize our approximate distribution**, q* [3].

## Why do we need variational Autoencoders?

Variational autoencoders (VAEs) are **a deep learning technique for learning latent representations**. They have also been used to draw images, achieve state-of-the-art results in semi-supervised learning, as well as interpolate between sentences.

## Why is VAE not AE?

So, to conclude, **if you want precise control over your latent representations and what you would like them to represent, then choose VAE**. Sometimes, precise modeling can capture better representations as in [2]. However, if AE suffices for the work you do, then just go with AE, it is simple and uncomplicated enough.

## What is the difference between Overcomplete and Undercomplete autoencoders?

Undercomplete and Overcomplete Autoencoders

**The only difference between the two is in the encoding output’s size**. In the diagram above, this refers to the encoding output’s size after our first affine function (yellow box) and non-linear function (pink box).