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capsnet readme
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Varuna Jayasiri
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<p>Capsule network is a neural network architecture that embeds features
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as capsules and routes them with a voting mechanism to next layer of capsules.</p>
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<p>Unlike in other implementations of models, we’ve included a sample, because
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it is difficult to understand some of the concepts with just the modules.
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it is difficult to understand some concepts with just the modules.
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<a href="mnist.html">This is the annotated code for a model that uses capsules to classify MNIST dataset</a></p>
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<p>This file holds the implementations of the core modules of Capsule Networks.</p>
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<p>I used <a href="https://github.com/jindongwang/Pytorch-CapsuleNet">jindongwang/Pytorch-CapsuleNet</a> to clarify some
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docs/capsule_networks/readme.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
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<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
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<meta name="description" content=""/>
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<meta name="twitter:card" content="summary"/>
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<meta name="twitter:image:src" content="https://avatars1.githubusercontent.com/u/64068543?s=400&v=4"/>
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<meta name="twitter:title" content="Capsule Networks"/>
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<meta name="twitter:description" content=""/>
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<meta name="twitter:site" content="@labmlai"/>
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<meta name="twitter:creator" content="@labmlai"/>
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<meta property="og:url" content="https://nn.labml.ai/capsule_networks/readme.html"/>
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<meta property="og:title" content="Capsule Networks"/>
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<meta property="og:image" content="https://avatars1.githubusercontent.com/u/64068543?s=400&v=4"/>
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<meta property="og:site_name" content="LabML Neural Networks"/>
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<meta property="og:type" content="object"/>
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<meta property="og:title" content="Capsule Networks"/>
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<meta property="og:description" content=""/>
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<title>Capsule Networks</title>
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<link rel="shortcut icon" href="/icon.png"/>
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<link rel="stylesheet" href="../pylit.css">
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<link rel="canonical" href="https://nn.labml.ai/capsule_networks/readme.html"/>
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gtag('config', 'G-4V3HC8HBLH');
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<body>
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<div id='container'>
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<div id="background"></div>
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<div class='section'>
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<div class='docs'>
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<p>
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<a class="parent" href="/">home</a>
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<a class="parent" href="index.html">capsule_networks</a>
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</p>
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<p>
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<a href="https://github.com/lab-ml/labml_nn/tree/master/labml_nn/capsule_networks/readme.md">
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<div class='section' id='section-0'>
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<div class='docs'>
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<div class='section-link'>
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<a href='#section-0'>#</a>
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</div>
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<h1><a href="https://nn.labml.ai/capsule_networks/index.html">Capsule Networks</a></h1>
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<p>This is a <a href="https://pytorch.org">PyTorch</a> implementation/tutorial of
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<a href="https://arxiv.org/abs/1710.09829">Dynamic Routing Between Capsules</a>.</p>
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<p>Capsule network is a neural network architecture that embeds features
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as capsules and routes them with a voting mechanism to next layer of capsules.</p>
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<p>Unlike in other implementations of models, we’ve included a sample, because
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it is difficult to understand some concepts with just the modules.
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<a href="mnist.html">This is the annotated code for a model that uses capsules to classify MNIST dataset</a></p>
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<p>This file holds the implementations of the core modules of Capsule Networks.</p>
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<p>I used <a href="https://github.com/jindongwang/Pytorch-CapsuleNet">jindongwang/Pytorch-CapsuleNet</a> to clarify some
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confusions I had with the paper.</p>
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<p>Here’s a notebook for training a Capsule Network on MNIST dataset.</p>
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<p><a href="https://colab.research.google.com/github/lab-ml/nn/blob/master/labml_nn/capsule_networks/mnist.ipynb"><img alt="Open In Colab" src="https://colab.research.google.com/assets/colab-badge.svg" /></a>
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<a href="https://app.labml.ai/run/e7c08e08586711ebb3e30242ac1c0002"><img alt="View Run" src="https://img.shields.io/badge/labml-experiment-brightgreen" /></a></p>
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</div>
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<div class='code'>
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</div>
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</div>
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</div>
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</div>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-AMS_HTML">
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</script>
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<!-- MathJax configuration -->
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<script type="text/x-mathjax-config">
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MathJax.Hub.Config({
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tex2jax: {
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inlineMath: [ ['$','$'] ],
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displayMath: [ ['$$','$$'] ],
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processEscapes: true,
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processEnvironments: true
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},
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// Center justify equations in code and markdown cells. Elsewhere
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// we use CSS to left justify single line equations in code cells.
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displayAlign: 'center',
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"HTML-CSS": { fonts: ["TeX"] }
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});
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</script>
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</body>
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</html>
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@ -123,7 +123,7 @@
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\hat{A_t^{(\infty)}} &= r_t + \gamma r_{t+1} +\gamma^2 r_{t+1} + ... - V(s)
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\end{align}</script>
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</p>
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<p>$\hat{A_t^{(1)}}$ is high bias, low variance whilst
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<p>$\hat{A_t^{(1)}}$ is high bias, low variance, whilst
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$\hat{A_t^{(\infty)}}$ is unbiased, high variance.</p>
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<p>We take a weighted average of $\hat{A_t^{(k)}}$ to balance bias and variance.
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This is called Generalized Advantage Estimation.
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@ -76,9 +76,9 @@
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<p>This is a <a href="https://pytorch.org">PyTorch</a> implementation of
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<a href="https://arxiv.org/abs/1707.06347">Proximal Policy Optimization - PPO</a>.</p>
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<p>PPO is a policy gradient method for reinforcement learning.
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Simple policy gradient methods one do a single gradient update per sample (or a set of samples).
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Doing multiple gradient steps for a singe sample causes problems
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because the policy deviates too much producing a bad policy.
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Simple policy gradient methods do a single gradient update per sample (or a set of samples).
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Doing multiple gradient steps for a single sample causes problems
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because the policy deviates too much, producing a bad policy.
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PPO lets us do multiple gradient updates per sample by trying to keep the
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policy close to the policy that was used to sample data.
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It does so by clipping gradient flow if the updated policy
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@ -172,7 +172,7 @@ J(\pi_\theta) - J(\pi_{\theta_{OLD}})
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</p>
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<p>Then we assume $d^\pi_\theta(s)$ and $d^\pi_{\theta_{OLD}}(s)$ are similar.
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The error we introduce to $J(\pi_\theta) - J(\pi_{\theta_{OLD}})$
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by this assumtion is bound by the KL divergence between
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by this assumption is bound by the KL divergence between
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$\pi_\theta$ and $\pi_{\theta_{OLD}}$.
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<a href="https://arxiv.org/abs/1705.10528">Constrained Policy Optimization</a>
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shows the proof of this. I haven’t read it.</p>
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@ -659,14 +659,14 @@
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<url>
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<loc>https://nn.labml.ai/rl/ppo/index.html</loc>
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<lastmod>2021-02-23T16:30:00+00:00</lastmod>
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<lastmod>2021-03-05T16:30:00+00:00</lastmod>
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<priority>1.00</priority>
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</url>
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<url>
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<loc>https://nn.labml.ai/rl/ppo/gae.html</loc>
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<lastmod>2021-01-30T16:30:00+00:00</lastmod>
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<lastmod>2021-03-05T16:30:00+00:00</lastmod>
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<priority>1.00</priority>
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</url>
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@ -16,7 +16,7 @@ Capsule network is a neural network architecture that embeds features
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as capsules and routes them with a voting mechanism to next layer of capsules.
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Unlike in other implementations of models, we've included a sample, because
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it is difficult to understand some of the concepts with just the modules.
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it is difficult to understand some concepts with just the modules.
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[This is the annotated code for a model that uses capsules to classify MNIST dataset](mnist.html)
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This file holds the implementations of the core modules of Capsule Networks.
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21
labml_nn/capsule_networks/readme.md
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21
labml_nn/capsule_networks/readme.md
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# [Capsule Networks](https://nn.labml.ai/capsule_networks/index.html)
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This is a [PyTorch](https://pytorch.org) implementation/tutorial of
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[Dynamic Routing Between Capsules](https://arxiv.org/abs/1710.09829).
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Capsule network is a neural network architecture that embeds features
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as capsules and routes them with a voting mechanism to next layer of capsules.
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Unlike in other implementations of models, we've included a sample, because
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it is difficult to understand some concepts with just the modules.
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[This is the annotated code for a model that uses capsules to classify MNIST dataset](mnist.html)
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This file holds the implementations of the core modules of Capsule Networks.
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I used [jindongwang/Pytorch-CapsuleNet](https://github.com/jindongwang/Pytorch-CapsuleNet) to clarify some
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confusions I had with the paper.
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Here's a notebook for training a Capsule Network on MNIST dataset.
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[](https://colab.research.google.com/github/lab-ml/nn/blob/master/labml_nn/capsule_networks/mnist.ipynb)
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[](https://app.labml.ai/run/e7c08e08586711ebb3e30242ac1c0002)
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