Search Results for author: Kristin Branson

Found 12 papers, 2 papers with code

Evaluation metrics for behaviour modeling

no code implementations23 Jul 2020 Daniel Jiwoong Im, Iljung Kwak, Kristin Branson

A primary difficulty with unsupervised discovery of structure in large data sets is a lack of quantitative evaluation criteria.

Imitation Learning

Are skip connections necessary for biologically plausible learning rules?

no code implementations NeurIPS Workshop Neuro_AI 2019 Daniel Jiwoong Im, Rutuja Patil, Kristin Branson

Backpropagation is the workhorse of deep learning, however, several other biologically-motivated learning rules have been introduced, such as random feedback alignment and difference target propagation.

Detecting the Starting Frame of Actions in Video

1 code implementation7 Jun 2019 Iljung S. Kwak, Jian-Zhong Guo, Adam Hantman, David Kriegman, Kristin Branson

In this work, we address the problem of precisely localizing key frames of an action, for example, the precise time that a pitcher releases a baseball, or the precise time that a crowd begins to applaud.

Action Recognition

Importance Weighted Adversarial Variational Autoencoders for Spike Inference from Calcium Imaging Data

no code implementations7 Jun 2019 Daniel Jiwoong Im, Sridhama Prakhya, Jinyao Yan, Srinivas Turaga, Kristin Branson

The Importance Weighted Auto Encoder (IWAE) objective has been shown to improve the training of generative models over the standard Variational Auto Encoder (VAE) objective.

Stochastic Neighbor Embedding under f-divergences

no code implementations3 Nov 2018 Daniel Jiwoong Im, Nakul Verma, Kristin Branson

A common concern with $t$-SNE criterion is that it is optimized using gradient descent, and can become stuck in poor local minima.

Quantitatively Evaluating GANs With Divergences Proposed for Training

no code implementations ICLR 2018 Daniel Jiwoong Im, He Ma, Graham Taylor, Kristin Branson

Generative adversarial networks (GANs) have been extremely effective in approximating complex distributions of high-dimensional, input data samples, and substantial progress has been made in understanding and improving GAN performance in terms of both theory and application.

Network-size independent covering number bounds for deep networks

no code implementations2 Nov 2017 Mayank Kabra, Kristin Branson

We give a covering number bound for deep learning networks that is independent of the size of the network.

An empirical analysis of the optimization of deep network loss surfaces

no code implementations13 Dec 2016 Daniel Jiwoong Im, Michael Tao, Kristin Branson

The success of deep neural networks hinges on our ability to accurately and efficiently optimize high-dimensional, non-convex functions.

Stochastic Optimization

Learning recurrent representations for hierarchical behavior modeling

no code implementations1 Nov 2016 Eyrun Eyjolfsdottir, Kristin Branson, Yisong Yue, Pietro Perona

We propose a framework for detecting action patterns from motion sequences and modeling the sensory-motor relationship of animals, using a generative recurrent neural network.

Action Detection motion prediction

Understanding Classifier Errors by Examining Influential Neighbors

no code implementations CVPR 2015 Mayank Kabra, Alice Robie, Kristin Branson

As computing the influence of each training example is computationally impractical, we propose a novel distance metric to approximate influence for boosting classifiers that is fast enough to be used interactively.

Sample complexity of learning Mahalanobis distance metrics

no code implementations NeurIPS 2015 Nakul Verma, Kristin Branson

Metric learning seeks a transformation of the feature space that enhances prediction quality for the given task at hand.

Metric Learning

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