COVI White Paper

no code implementations • 18 May 2020 • Hannah Alsdurf, Edmond Belliveau, Yoshua Bengio, Tristan Deleu, Prateek Gupta, Daphne Ippolito, Richard Janda, Max Jarvie, Tyler Kolody, Sekoul Krastev, Tegan Maharaj, Robert Obryk, Dan Pilat, Valerie Pisano, Benjamin Prud'homme, Meng Qu, Nasim Rahaman, Irina Rish, Jean-Francois Rousseau, Abhinav Sharma, Brooke Struck, Jian Tang, Martin Weiss, Yun William Yu

Manual contact tracing of Covid-19 cases has significant challenges that limit the ability of public health authorities to minimize community infections.

BIG-bench Machine Learning

Randen - fast backtracking-resistant random generator with AES+Feistel+Reverie

1 code implementation • 4 Oct 2018 • Jan Wassenberg, Robert Obryk, Jyrki Alakuijala, Emmanuel Mogenet

Replacing existing generators with Randen can protect randomized algorithms such as reservoir sampling from attack.

Cryptography and Security Data Structures and Algorithms 94A60 G.3

Guetzli: Perceptually Guided JPEG Encoder

1 code implementation • 13 Mar 2017 • Jyrki Alakuijala, Robert Obryk, Ostap Stoliarchuk, Zoltan Szabadka, Lode Vandevenne, Jan Wassenberg

Guetzli is a new JPEG encoder that aims to produce visually indistinguishable images at a lower bit-rate than other common JPEG encoders.

Perceptual Distance Quantization

Users prefer Guetzli JPEG over same-sized libjpeg

no code implementations • 13 Mar 2017 • Jyrki Alakuijala, Robert Obryk, Zoltan Szabadka, Jan Wassenberg

We report on pairwise comparisons by human raters of JPEG images from libjpeg and our new Guetzli encoder.