Princeton > CS Dept > PIXL > Lunch Local Access 

The PIXL lunch meets every Monday during the semester at noon in room 402 of the Computer Science building. To get on the mailing list to receive announcements, sign up for the "pixl-talks" list at

Upcoming Talks

Monday, March 25, 2019
Yueqi Duan, Tsinghua University

Monday, April 08, 2019

Monday, April 15, 2019

Monday, April 22, 2019
Felix Yu, Ethan Tseng

Monday, April 29, 2019
Amir Rosenfeld

Previous Talks

Monday, February 04, 2019
Yuke Zhu, Stanford University

Robots and autonomous systems have been playing a significant role in the modern economy. Custom-built robots have remarkably improved productivity, operational safety, and product quality. These robots are usually programmed for specific tasks in well-controlled environments, but unable to perform diverse tasks in the real world. In this talk, I will present my work on building more powerful and generalizable robot autonomy by closing the perception-action loop. I will discuss examples of my research that establish a tighter coupling between perception and action at three levels of abstraction, including learning primitive motor skills from raw sensory data, transferring knowledge between sequential tasks in visual environments, and learning compositional task structures from video demonstrations.

Monday, February 11, 2019
Presenting three works: From potential bias in image-to-image translation models to semi-supervised and unsupervised techniques for landmark localization.
Sina Honari

In the first part of the talk, I discuss how image-to-image translation models, such as CycleGAN, can inject bias due to matching the data distribution in the target domain, regardless of the critical information in the source domain.

In the second part of the talk, I present a semi-supervised model for landmark localization. The model leverages weaker labels (e.g. head pose, hand gesture) to guide the landmark localization network. It also uses an unsupervised technique by proposing any transformation applied to the image should modify the landmarks equivariantly.

In the last part of the talk, I present an unsupervised technique for depth estimation over landmarks. This is done by transforming one face onto another unpaired face using an affine transformation and creating a bottleneck where only the depth is unknown, hence giving the depth to us for free. We then leverage the estimated depth for other tasks such as face rotation and face replacement.

Sina Honari is a PhD student at Mila and University of Montreal under supervision of Pascal Vincent and Christopher Pal. His broad domains of research are deep learning and computer vision. His past works have focused on unsupervised and semi-supervised learning techniques, generative models, and representation learning in computer vision.

Monday, February 25, 2019

Everyone gives a 5 minute talk about what they are doing.

Monday, March 04, 2019
From relations to distributions: combining graph reasoning with generative models.
Zhiwei Deng, Simon Fraser University

Graphs are a general formalism to represent data and are prevalent in many applications including knowledge graphs, natural language semantics, and visual understanding. In the first part of the talk, I’ll present my work on how to combine graph relational reasoning with deep neural networks and apply them in computer vision tasks. In the second part, I’ll discuss my work on combining relational models, and reusable functions with generative models. I will show that incorporating high-level modules can help to build models with stronger generalization. Simultaneously, bringing generative models into graph can lead to a general learning to reason framework in graph neural networks.

Zhiwei Deng is a PhD student at Simon Fraser University supervised by professor Greg Mori. He’s broadly interested in computer vision and machine learning techniques. His main research focuses are video analysis, graphical model with deep learning and generative modeling.