6 GAN Architectures You Really Should Know

September 13, 2022

Generative Adversarial Networks (GANs) first came to be known by the world in 2014. It was conceptualised and materialised by Ian Goodfellow. Since then, GAN has become a new area of research. GANs are deep learning-based generative models. Here a machine is taught to generate an output on data that it has not seen before. It also helps two neural networks to compete with each other in an adversarial fashion. This helps to make the neural network more accurate and deliver the result.

For instance, the image of a new human face can be generated from scratch. The unique feature about this is that every human face is unique, something that has never existed before. But it looks real because it is based on some data that has been trained into the deep learning model. This technique is what Generative Adversarial Network or GAN is all about.

AI and ML engineers have researched it, and within a few years, the research community came up with plenty of unpatented and patented work and progressed the invention of GANs further. This led to the Generative Models showing promising results in producing realistic images. GANs have also displayed tremendous prowess in Computer Vision and have replicated the success in audio and text as well. But most of the work is in the developmental stage.

But there are six important GAN architectures that every AI and ML enthusiast should know about:

  1. PixelRNN

PixelRNNs are GANs that can predict the pixels in an image sequentially. This image should have two spatial dimensions. The modelling is done along the lines of the raw pixels’ discrete probability values, and then the encryption can then complete the sets of dependencies in that specific image.

  1. Text-2-image GAN

Text-to-image is one of the most useful GANs. It is a deep learning model which can generate images from textual descriptions. Earlier, this was done by police sketch artists because of low technological resources. But now, it can be done with the help of text-2-image GANs.

  1. StyleGAN

The StyleGAN is a continuation of the progressive, developing GAN that is a proposition for training generator models to synthesise enormous high-quality photographs via the incremental development of both discriminator and generator models from minute to extensive pictures.

  1. DiscoGAN

A DiscoGAN is a GAN that produces images of products in domain B if an image is given in domain A. These images resemble each other in style and pattern. This is a powerful ability because the relationship can be learned without openly pairing images during training. It also saves time.

  1. CycleGAN

The CycleGAN, or the Cycle Generative Adversarial Network, or CycleGAN, is a training approach for image-to-image translation tasks in a deep convolutional neural network. The Neural Network uses an unpaired dataset to learn the mapping between the input and output images.

  1. LSGAN

Least Squares GAN or LSGAN is a GAN type that accepts the least squares loss function for the role of the discriminator. Therefore, minimising the objective function of LSGAN also minimises the Pearson divergence.

Parting Thoughts

These were some of the GAN architectures being used, and constant research and development are going on in these fields. If you want to read more AI, ML and DL blogs like these, visit the website of E2E Networks.

Reference Link

https://machinelearningmastery.com/what-are-generative-adversarial-networks-gans/

https://developers.google.com/machine-learning/gan/gan_structure

https://www.kaggle.com/roydatascience/introduction-to-generative-adversarial-networks

https://www.geeksforgeeks.org/cycle-generative-adversarial-network-cyclegan-2/

https://neptune.ai/blog/6-gan-architectures

https://medium.com/towards-artificial-intelligence/generating-matching-bags-from-shoe-images-and-vice-versa-using-discogans-8149e2cbc02

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A Complete Guide To Customer Acquisition For Startups

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Reference Links

https://www.helpscout.com/customer-acquisition/

https://www.cloudways.com/blog/customer-acquisition-strategy-for-startups/

https://blog.hubspot.com/service/customer-acquisition

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The testing will also be done on the same parameters, which will also help to create a uniform, cluttered background, or both.

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  • Training used

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  • It can be used in airport security, where concealed shapes can be used for guessing whether a person is armed or is carrying explosives or not.
  • It can also help in completing DNA sequences.

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Reference Links

https://tongtianta.site/paper/68922

https://github.com/natowi/3D-Reconstruction-with-Deep-Learning-Methods

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What is Q-Learning Algorithm?

The process of Q-Learning is important for understanding the data from scratch. It involves defining the parameters, choosing the actions from the current state and also choosing the actions from the previous state and then developing a Q-table for maximizing the results or output rewards.

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Reference Links

https://analyticsindiamag.com/comprehensive-guide-to-deep-q-learning-for-data-science-enthusiasts/

https://medium.com/@jereminuerofficial/a-comprehensive-guide-to-deep-q-learning-8aeed632f52f

This is a decorative image for: GAUDI: A Neural Architect for Immersive 3D Scene Generation
October 13, 2022

GAUDI: A Neural Architect for Immersive 3D Scene Generation

The evolution of artificial intelligence in the past decade has been staggering, and now the focus is shifting towards AI and ML systems to understand and generate 3D spaces. As a result, there has been extensive research on manipulating 3D generative models. In this regard, Apple’s AI and ML scientists have developed GAUDI, a method specifically for this job.

An introduction to GAUDI

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GAUDI can perform multiple functions –

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  • Generative modelling for 3D objects has been used for generating scenes using graf, pigan, and gsn, which incorporate a GAN (Generative Adversarial Network). The generator codes radiance fields exclusively. Using the 3D space in the scene along with the camera pose generates the 3D image from that point. This point has a density scalar and RGB value for that specific point in 3D space. This can be done from a 2D camera view. It does this by imposing 3D datasets on those 2D shots. It isolates various objects and scenes and combines them to render a new scene altogether.
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  • GAUDI also uses this to train data on a canonical coordinate system. You can compare it by looking at the trajectory of the scenes.

How is GAUDI applied to the content?

The steps of application for GAUDI have been given below:

  • Each trajectory is created, which consists of a sequence of posed images (These images are from a 3D scene) encoded into a latent representation. This representation which has a radiance field or what we refer to as the 3D scene and the camera path is created in a disentangled way. The results are interpreted as free parameters. The problem is optimized by and formulation of a reconstruction objective.
  • This simple training process is then scaled to trajectories, thousands of them creating a large number of views. The model samples the radiance fields totally from the previous distribution that the model has learned.
  • The scenes are thus synthesized by interpolation within the hidden space.
  • The scaling of 3D scenes generates many scenes that contain thousands of images. During training, there is no issue related to canonical orientation or mode collapse.
  • A novel de-noising optimization technique is used to find hidden representations that collaborate in modelling the camera poses and the radiance field to create multiple datasets with state-of-the-art performance in generating 3D scenes by building a setup that uses images and text.

To conclude, GAUDI has more capabilities and can also be used for sampling various images and video datasets. Furthermore, this will make a foray into AR (augmented reality) and VR (virtual reality). With GAUDI in hand, the sky is only the limit in the field of media creation. So, if you enjoy reading about the latest development in the field of AI and ML, then keep a tab on the blog section of the E2E Networks website.

Reference Links

https://www.researchgate.net/publication/362323995_GAUDI_A_Neural_Architect_for_Immersive_3D_Scene_Generation

https://www.technology.org/2022/07/31/gaudi-a-neural-architect-for-immersive-3d-scene-generation/ 

https://www.patentlyapple.com/2022/08/apple-has-unveiled-gaudi-a-neural-architect-for-immersive-3d-scene-generation.html

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