neural networks

172 posts
Here’s how a neural network works

Daniel Smilkov and Shan Carter at Google put together this interactive learner for how a neural network works. In case you’re unfamiliar with the method: It’s a technique for building a computer program that learns from data. It is based very loosely on how we think the human brain works. First, a collection of software “neurons” are created and connected together, allowing them to send messages to each other. Next,...

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Playing with fonts using neural networks

Erik Bernhardsson downloaded 50,000 fonts and then threw them to the neural networks to see what sort of letters a model might come up with. These are all characters drawn from the test set, so the network hasn’t seen any of them during training. All we’re telling the network is (a) what font it is (b) what character it is. The model has seen other characters of the same font...

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Fast image classifications in real-time

NeuralTalk2 uses neural networks to caption images quickly. To demonstrate, the video below shows a webcam feed that continuously updates with new image captions based on what the computer sees. It's not perfect of course, but the performance is impressive. Tags: classification, images, neural networks

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Neural Network for selfie analysis

To introduce Convolutional Neural Networks, Andrej Karpathy looked at millions of selfies, left the computer to its own devices, and tried to find what makes a good selfie. Okay, so we collected 2 million selfies, decided which ones are probably good or bad based on the number of likes they received (controlling for the number of followers), fed all of it to Caffe and trained a ConvNet. The ConvNet "looked"...

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Automated Super Mario World gameplay through machine learning

Seth Bling made a bot — MarI/O — that automatically learns how to play Super Mario World. It's based on research by Kenneth O. Stanley and Risto Miikkulainen from 2002 that uses neural networks that evolve with a genetic algorithm. MarI/O starts out really dumb, just standing in place, but after enough simulations it get smart enough to navigate the world. Code available here and the paper from Stanley and...

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Translating images to words

With Google's image search, the results kind of exist in isolation. There isn't a ton of context until you click through to see how an image is placed among words. So, researchers at Google are trying an approach similar to how they translate languages to automatically create captions for the images. Now Oriol Vinyals and pals at Google are using a similar approach to translate images into words. Their technique...

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