Roey Mechrez

I am a PhD student at the department of Electrical Engineering at the Technion, where I work on computer vision. I work at the Computer Graphics & Multimedia lab under supervision of Prof. Lihi Zelnik-Manor. In my research I've worked on Saliency Manipulation, Image Generation, Super-resolution and normal estimation, Photorealistic synthesis, and Template Matching.

I did my masters and bachelors at Tel Aviv University in Biomedical Engineering (cum laude).

Email  /  CV  /  Biography  /  Google Scholar  /  LinkedIn

News

I'm organizing PIRM2018: Workshop and Challenge on Perceptual Image Restoration and Manipulation at ECCV 2018.

Research

I'm interested in computer vision, machine learning, optimization, image processing, and computational photography. Most of my papers deal with photorealistic image generation and manipulation in the low-mid level such as perceptual super resolution and in the high semantic level such as semantic style transfer.

Maintain Natural Image Statistics with the Contextual Loss
Roey Mechrez*, Itamar Talmi*, Lihi Zelnik-Manor
arXiv, 2018
project page / GitHub / arXiv
Results: BSD100 / PIRM / DIV2K / set5 / set14 / urban100

We use the contextual loss for two image restoration problems: super-resolution and normal estimation and reveal its relation to the KL-divergence.

The Contextual Loss for Image Transformation with Non-Aligned Data
Roey Mechrez*, Itamar Talmi*, Lihi Zelnik-Manor
Accepted to ECCV, 2018
project page / GitHub / arXiv / (Oral Acceptance rate 2.4%)
Resaults: faces / animals / cool politicians / single image animation / puppet control / male2female / female2male

We suggest a new loss function for image manipulation and generation. We show some very cool applications such as semantic style transfer and single image animations.

Saliency Driven Image Manipulation
Roey Mechrez, Eli Shechtman Lihi Zelnik-Manor
WACV, 2018
project page / GitHub / arXiv / video / Best paper (people's choice)

We suggest a new loss function for image manipulation and generation. We show some very cool applications such as semantic style transfer and single image animations.

Photorealistic Style Transfer with Screened Poisson Equation
Roey Mechrez, Eli Shechtman Lihi Zelnik-Manor
BMVC, 2018
project page / GitHub / arXiv / Results

Using the Screened Poisson Equation for photorealism style transfer

Template Matching with Deformable Diversity Similarity
Itamar Talmi*, Roey Mechrez*, Lihi Zelnik-Manor
CVPR, 2017
project page / GitHub / arXiv / (Spotlight Acceptance rate 8%)

Novel measure for template matching named Deformable Diversity Similarity -- based on the diversity of feature matches between a target image window and the template

Patch-Based Segmentation with Spatial Consistency: Application to MS Lesions in Brain MRI
Roey Mechrez, Jacob Goldberger Hayit Greenspan
International Journal of Biomedical Imaging, 2016
paper

MS Lesion Segmentation using a Multi-Channel Patch-Based Approach with Spatial Consistency
Roey Mechrez, Jacob Goldberger Hayit Greenspan
SPIE Medical Imaging. International Society for Optics and Photonics, 2015
Paper

Teaching
computer_vision

EE046746 Applications and Algorithms in Computer Vision - Spring 2017

EE046746 Applications and Algorithms in Computer Vision - Spring 2018