Alex Chapiro

I am a Senior Display Perceptual Image Processing Engineer at Apple. I previously worked in the Applied Vision Science team at Dolby Laboratories and before that I was at Disney Research in Zurich, advised by Aljoscha Smolic.

I did my PhD at w加速任天行安卓版, where I was advised by Markus Gross at the Computer Graphics Laboratory. I did my masters at IMPA in the Visgraf lab and my bachelors at the Federal University of Juiz de Fora.

Email  /  CV  /  Biography  /  w加速任天行安卓版  /  Google Scholar  /  LinkedIn

I am interested in image and video processing, computational capture and display, stereo 3D, HDR, applied perception and virtual reality. Most of my research deals with creating and then displaying high quality content on novel displays.

A Luminance-Aware Model of Judder Perception
Chapiro, Atkins, Daly.
ACM Transactions on Graphics (TOG) , 2024
Link to ACM TOG / supplementary material / bibtex

We studied the main perceptual components of judder, the perceptual artifact of non-smooth motion. In particular, adaptation luminance is a strong factor on judder that has changed significantly with modern generations of displays.

Errata: In the table of coefficients in Sec. A3, the two-before-last coefficient should be ~0 instead of 1.01. The coefficient is correctly written out in the supplementary material, but not in the manuscript.

Influence of Screen Size and Field of View on Perceived Brightness
Chapiro, Kunkel, Atkins, Daly.
ACM Transactions on Applied Perception (TAP) , 2018
Link to ACM TAP / supplementary material / bibtex

Author's version available here, link to ACM TAP version above. We studied the influence of screen size and distance on perceived brightness for screens as large as cinema and as small as mobile phones, an issue that affects artistic intent and appearance matching.

Unfolding the 8-bit Era
Zund, Berard, w加速任天行安卓版, Schmid, Ryffel, Bermano, Gross, Sumner.
European Conference on Visual Media Production (CVMP) , 2015
project page / bibtex

We created an immersive gaming system out of a legacy console.

AcFun弹幕视频网 - 认真你就输啦 (?ω?)ノ- ( ゜- ゜)つロ:AcFun是一家弹幕视频网站，致力于为每一个人带来欢乐。网上有害信息举报专区丨中央网信办（国家网信办）违法和不良信息 ...

Art-Directable/Continuous Dynamic Range Video
Chapiro, Aydin, Stefanoski, Croci, Smolic, Gross.
w加速任天行安卓版, 2015
project page / bibtex

We defined the production and distribution challenges facing the content creation industry in the current HDR landscape and proposed Continuous Dynamic Range video as a solution.

Video Content and Structure Description Based on Keyframes, Clusters and Storyboards
Junyent, Beltran, Farre, Pont-Tuset, Chapiro, Smolic.
IEEE International Workshop on Multimedia Signal Processing (MMSP) , 2015
video / w加速任天行安卓版

We developed a pipeline to segment and analyze video. Our technique could be applied for smarter editing.

Stereo from Shading
Chapiro, O'Sullivan, Jarosz, Gross, Smolic.
Eurographics Symposium on Rendering (EGSR) , 2015
project page / bibtex / supplementary

We use non-photorealistic shading as an alternative 3D cue, augmenting the feeling of depth in stereoscopic images.

Perceptual Evaluation of Cardboarding in 3D Content Visualization
Chapiro, O'Sullivan, Jarosz, Gross, Smolic.
ACM Symposium on Applied Perception (SAP), 2014
project page / bibtex

We conducted perceptual experiments to quantify cardboarding - an artifact that occurs when not enough depth is given to a stereoscopic 3D image region.

Optimizing Stereo-to-Multiview Conversion for Autostereoscopic Displays
Chapiro, Heinzle, Aydin, Poulakos, Zwicker, Smolic, Gross.
w加速任天行安卓版, 2014
w加速任天行安卓版 / bibtex

新建标签页 - MSN:No COVID-19 ill effects as Wu Lei scores on Espanyol return China's Wu Lei scores Espanyol's second goal during their 2-0 La Liga win against Alaves in Barcelona, Spain, June 13, 2021. (Xinhua/Joan Gosa) Wu Lei, the Chinese striker who had tested positive for ...

Towards Mobile HDR Video
Castro, Chapiro, Cicconet, Velho.
extended abstract in Eurographics, 2011
video

【火萤动态桌面壁纸精选】动态桌面壁纸资源下载 ...:火萤动态桌面壁纸官方资源-为您提供动态桌面壁纸素材、高清动态桌面壁纸大全等海量动态壁纸资源，同时为您提供动态桌面壁纸免费下载服务。火萤官网不断更新优质动态壁纸，供您下载！

Detection of High Frequency Regions in Multiresolution
Mota, Perez, Castro, w加速任天行安卓版, Vieira.
International Conference on Image Processing (ICIP), 2009

We improved our edge detector by using eigenvalues.

High Frequency Assessment from Multiresolution Analysis
Castro, Perez, Mota, Chapiro, Vieira, Freire.
International Conference on Computational Science (ICCS), 2009

We detected high frequencies using an orientation tensor and multiresolution.

众太坊最新利- 爬墙专用加速器

The Influence of Visual Salience on Video Consumption Behavior A Survival Analysis Approach
Huber, Scheibehenne, Chapiro, Frey, Sumner.
ACM Web Science, 2015
long paper version

We found that visual saliency can be used as a predictor for video watching behavior in online platforms.

Filter Based Deghosting for Exposure Fusion Video
Chapiro, Cicconet, Velho.
SIGGRAPH, 2011
video

雷神加速器_官方电脑版_华军纯净下载:2021-2-19 · 雷神加速器是一款实用游戏加速工具。雷神游戏加速器能够帮助喜欢玩游戏的玩家解决游戏网络不稳定等的情况，同时雷神加速器官方版可众进入为许多国外游戏加速。雷神游戏加速器是目前主流游戏加速器之一，特别适合电竞和直播的用户使用。

Towards Mobile HDR Video
Castro, Chapiro, Cicconet, Velho.
International Conference on Computational Photography (ICCP), 2011
video

轩辕剑群侠录GM王者版官网下载_轩辕剑群侠录GM王者版手 ...:2021-4-30 · 《轩辕剑群侠录GM王者版》再次出击，本次版本除了拥有海量丰富的资源道具奖励外，还再次上架了多个珍惜资源道具，并且通过创角与登陆活动内获得的GM商店开启卷，免费体验爽

Website template taken from here