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Last Updated on February 13, 2013 by nghiaho12 I’ve been fascinated for the past months or so on using RBM (restricted Boltzmann machine) to automatically learn visual features, as oppose to hand crafting them. Alex Krizhevsky’s master thesis, Learning Multiple Layers of Features from Tiny Images, is a good source on this topic. I’ve been attempting to replicate the results on a much smaller set o
Last Updated on June 29, 2013 by nghiaho12 I’ve been experimenting with convolutional neural networks (CNN) for the past few months or so on the CIFAR-10 dataset (object recognition). CNN have been around since the 90s but seem to be getting more attention ever since ‘deep learning’ became a hot new buzzword. Most of my time was spent learning the architecture and writing my own code so I could un
Last Updated on June 20, 2014 by nghiaho12 I’ve been mucking around with video stabilization for the past two weeks after a masters student got me interested in the topic. The algorithm is pretty simple yet produces surprisingly good stabilization for panning videos and forwarding moving (eg. on a motorbike looking ahead). The algorithm works as follows: Find the transformation from previous to cu
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