Search Results for author: Pulkit Tandon

Found 6 papers, 2 papers with code

Towards a statistical theory of data selection under weak supervision

no code implementations25 Sep 2023 Germain Kolossov, Andrea Montanari, Pulkit Tandon

Given a sample of size $N$, it is often useful to select a subsample of smaller size $n<N$ to be used for statistical estimation or learning.

PIM: Video Coding using Perceptual Importance Maps

no code implementations20 Dec 2022 Evgenya Pergament, Pulkit Tandon, Oren Rippel, Lubomir Bourdev, Alexander G. Anderson, Bruno Olshausen, Tsachy Weissman, Sachin Katti, Kedar Tatwawadi

The contributions of this work are threefold: (1) we introduce a web-tool which allows scalable collection of fine-grained perceptual importance, by having users interactively paint spatio-temporal maps over encoded videos; (2) we use this tool to collect a dataset with 178 videos with a total of 14443 frames of human annotated spatio-temporal importance maps over the videos; and (3) we use our curated dataset to train a lightweight machine learning model which can predict these spatio-temporal importance regions.

Video Compression

An Interactive Annotation Tool for Perceptual Video Compression

1 code implementation8 May 2022 Evgenya Pergament, Pulkit Tandon, Kedar Tatwawadi, Oren Rippel, Lubomir Bourdev, Bruno Olshausen, Tsachy Weissman, Sachin Katti, Alexander G. Anderson

We use this tool to collect data in-the-wild (10 videos, 17 users) and utilize the obtained importance maps in the context of x264 coding to demonstrate that the tool can indeed be used to generate videos which, at the same bitrate, look perceptually better through a subjective study - and are 1. 9 times more likely to be preferred by viewers.

Video Compression

Txt2Vid: Ultra-Low Bitrate Compression of Talking-Head Videos via Text

1 code implementation26 Jun 2021 Pulkit Tandon, Shubham Chandak, Pat Pataranutaporn, Yimeng Liu, Anesu M. Mapuranga, Pattie Maes, Tsachy Weissman, Misha Sra

Video represents the majority of internet traffic today, driving a continual race between the generation of higher quality content, transmission of larger file sizes, and the development of network infrastructure.

Talking Face Generation Talking Head Generation +2

CAMBI: Contrast-aware Multiscale Banding Index

no code implementations29 Jan 2021 Pulkit Tandon, Mariana Afonso, Joel Sole, Lukáš Krasula

Banding artifacts are artificially-introduced contours arising from the quantization of a smooth region in a video.

Quantization

Efficient and Robust Spiking Neural Circuit for Navigation Inspired by Echolocating Bats

no code implementations NeurIPS 2016 Pulkit Tandon, Yash H. Malviya, Bipin Rajendran

We demonstrate a spiking neural circuit for azimuth angle detection inspired by the echolocation circuits of the Horseshoe bat Rhinolophus ferrumequinum and utilize it to devise a model for navigation and target tracking, capturing several key aspects of information transmission in biology.

Computational Efficiency

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