Kosta Derpanis
@CSProfKGD
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#CS Assoc Prof @YorkUniversity, #ComputerVision Scientist Samsung #AI, @VectorInst Faculty Affiliate, TPAMI AE, @ELLISforEurope Member #CVPR2025 Publicity Chair
Toronto, Ontario
Joined August 2015
Lecture slides for my "Introduction to #ComputerVision" and "#DeepLearning in Computer Vision" courses. 🆕 Lecture on Flow Matching. The included videos do not contain voiceovers yet, planned for a future revision.
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Not going to lie, have a tear in my eye 😢
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Prof. Gilbert Strang the original YouTuber, before there was a YouTube. Thank you for your many contributions!
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Lecture slides for my courses. Introduction to #ComputerVision:. #DeepLearning in Computer Vision:. The included videos do not contain voiceovers, planned for a future revision.
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Tools to Design or Visualize Architecture of Neural Network.
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A new use of the asterisk in the paper author list for credit assignment
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My sons asked me to describe academia to them. Here is my best shot.
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The textbook I use for my #DeepLearning course 😍 HIGHLY recommended!!!.
Are you (or is someone you know) teaching AI / ML / Deep Learning this year? My forthcoming book (freely available at will save you a lot of time. This thread will show you why.
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I lost my dad yesterday. Going to log off for a bit to recalibrate. Thanks dad for being an amazing role model of a father, husband and person. Thanks for your tireless support. Thank you for EVERYTHING. Lost from my sight but always in my heart ❤️ . RIP George Derpanis
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Recommended to generations of #ComputerVision researchers. Gilbert Strang, Linear Algebra and Its Applications. YouTube playlist of Strang lectures:
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Looking for a tutorial on diffusion models with ALL the “gory” mathematical details? Check out all 170 equations in this preprint.
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Recommended to generations of #ComputerVision researchers. A gem in my book collection!. Gilbert Strang, Linear Algebra and Its Applications
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Lecture slides for my "Introduction to #ComputerVision" and "#DeepLearning in Computer Vision" courses. 🆕 Lectures on Diffusion models and Graph Neural Networks. The included videos do not contain voiceovers yet, planned for a future revision.
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Great start to 2021! Draft PDF now available of Kevin Murphy’s book “Probabilistic Machine Learning: An Introduction”.
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Gem of a #deeplearning book by @francoisfleuret, GREAT visuals!. Walking around campus today reading this end-to-end, some may have mistaken me in partaking in a religious exercise 🤓.
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Geoffrey Hinton, How to represent part-whole hierarchies in a neural network, arXiv, 2021.
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New textbook by Gilbert Strang, “Linear Algebra and Learning from Data”, coming January 2019, includes #deeplearning @alfcnz
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Minutes away from Gilbert Strang’s final lecture.
Don't forget, TODAY (May 15) at 11:00am EST is Gilbert Strang's LAST lecture. Check out the live stream!. HUGE thank you Prof. Strang, your books, lectures and enthusiasm to education in all facets have been hugely influential to me and so many others.
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New #computervision textbook coming soon 🤗 Comes with HIGH praise. Shoutout to @KostasPenn for sharing info.
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Teaser alert: It's Backprop week in my #DeepLearning course. Putting the final touches on tomorrow's lecture.
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Old photo of @ylecun vs the #computervision community about learning versus handcrafting representations.
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Saturday afternoon reading. Diffusion Model + Object Detection 🤔
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Updated list of diffusion model tutorial sources, from my lecture on diffusion.
I wrote a tutorial on diffusion models for undergrad and grad students. I tried my best to give intuitive explanations for complicated equations. Your feedback is much appreciated. Thanks to those who suggested various reading materials to me.
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The last thing you ever want to hear at the end of your talk
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Research is where failure is the norm. Don’t let social media posts convince you otherwise. Managing failure is an important skill to develop.
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To break up the monotony of #ECCV2020 accepted papers (congrats to all btw), we had two papers rejected. YES, rejection is part of the research process, learn to deal with it. #academiclife.
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Teaching my #DeepLearning in #ComputerVision course next semester. Looking for blind spots in my content. Share your favourite deep learning course in the thread. Course:
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Shout out to @EigenSteve and his AMAZING lecture series using a lightboard. Truly inspiring!. Check out the YouTube playlist of lectures:
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Paper completed minutes before conference submission deadline.
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Quote of the day: "It was SOTA for about a day or so". 🤓.
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Gilbert Strang’s lecture videos on “Matrix Methods in Data Analysis, Signal Processing, and #MachineLearning”.
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Harmonics of Learning: Universal Fourier Features Emerge in Invariant Networks.
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Did you know ConvNets were initially patented by AT&T Bell Labs?. Source:
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When you forget to measure your kid's height as they are growing up, there is image metrology to the rescue 🤓
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Maybe it’s time to revisit the standard undergrad #ComputerScience curriculum and it’s relationship to #math. I’m advocating for more math (rather than the trend to less) but a more integrated delivery with CS. I’m currently checking out this book. Includes SVD @KostasPenn
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Clip from today's lecture on SGD with momentum. Slides from my full course for #DeepLearning in #ComputerVision:
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Often we take our image datasets for granted. There’s value in actually looking at the pixels. Check out:. Do We Train on Test Data? Purging CIFAR of Near-Duplicates, Björn Barz, Joachim Denzler. Paper:
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Nice!
Our computer vision textbook is released!. Foundations of Computer Vision.with Antonio Torralba and Bill Freeman. It’s been in the works for >10 years. Covers everything from linear filters and camera optics to diffusion models and radiance fields. 1/4
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On the topic of books, I highly recommend Gilbert Strang, Linear Algebra and Its Applications. Must read for #computervision researchers.
Recommended to generations of #ComputerVision researchers. Gilbert Strang, Linear Algebra and Its Applications. YouTube playlist of Strang lectures:
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Happy to share that I will be an Area Chair for #CVPR2021!!! This will be my first time serving as an AC for CVPR.
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We have fully-funded MSc and PhD positions in #ComputerVision and #MachineLearning at @YorkUniversity @LassondeSchool #Toronto for Fall 2022! . Interested? Please consider filling out the following form:
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DEAR workshop organizers, when sending a decision email, CHECK YOUR EMAIL TEMPLATE 🤣
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OK and last two, since they otherwise will sit on my drive unseen. Structure from Motion (Tomasi-Kanade Factorization)
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📢 Research Opportunities!. We’re seeking highly motivated postdocs & PhD students to dive into groundbreaking #ComputerVision research, exploring the future of 3D/4D neural rendering. These are fully-funded positions with supervision from Profs. David Lindell (@DaveLindell),.
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Updated lecture slides for my course on #DeepLearning in #ComputerVision. Link: The included videos do not contain voiceovers, planned for a future revision.
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EXCITED to share starting July 1st, my new home (and launch pad 🤓) will be @YorkUniversity @LassondeSchool EECS in #Toronto!!!. (with audio 😉)
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Vladlen Koltun, David Hafner The h-index is no longer an effective correlate of scientific reputation, arXiv, 2021. arXiv: Project page:
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Among public universities worldwide, Canadian professor salaries are the highest. (All Canadian universities are public.)
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Going to miss the holiday luxury of binge reading & just plain learning 😢 Need to carve out more me time. Cool paper alert: “Diffusion models as plug-and-play priors”,.Alexandros Graikos (@algreco_), Nikolay Malkin, Nebojsa Jojic, Dimitris Samaras.
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It's OFFICIAL!!! Today is my first day as an Associate Prof. in EECS @LassondeSchool @YorkUniversity
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Are you confused and frustrated by the diverse presentations of diffusion models in papers? Check out this wonderful blog by @sedielem that presents an overview of the many perspectives on diffusion.
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End of an era. Legend 🫡.
Prof. Gil Strang's last lecture is . Monday! Watch it via live stream:
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Playing around with the @LumaLabsAI iOS app. For someone who has been in #computervision for many years (and for those that are new too), the progress in 3D computer vision is mind boggling!
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Project page for our #CVPR2017 paper on 3D human pose prediction from a single image #ComputerVision #DeepLearning
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Had to cancel my #CVPR2024 trip today. My parents need my support. Have fun and share pics!.
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After almost a decade at @RyersonU CS, June 30 will be my last day. HUGE thank you to all my students for embracing me! It has been an honour being your instructor/mentor/supervisor. I am also grateful to my close colleagues for their mentorship & encouragement along the way.
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#KostasThoughts: Given its immense utility, I wish SVD was a standard topic in intro linear algebra courses for #ComputerScience students. (Animation: Keynote + After Effects)
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New lecture series alert: Diffusion Models and Their Applications - Fall 2024 (with videos).
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#ICLR2023 review debate: Unethical use of language or nothing wrong? Share thoughts below. Full review:
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1000+ citations 🍾. AMAZING collaboration with AMAZING people! ❤️ @geopavlakos @XiaoweiZhou5 @KostasPenn
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“Shows you why you should never ever ever use pixelation as a redaction technique.”.
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“Motion Without Movement" by William T. Freeman, Edward H. Adelson and David J. Heeger, SIGGRAPH 1991.
Holy crap: None of these cogs is actually turning or moving at all 😲
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Just arrived 🤗
Our computer vision textbook is released!. Foundations of Computer Vision.with Antonio Torralba and Bill Freeman. It’s been in the works for >10 years. Covers everything from linear filters and camera optics to diffusion models and radiance fields. 1/4
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Teaser alert: Next up "optimization" in my #DeepLearning course. Putting the final touches on tomorrow's lecture.
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“Writing a Good Research Paper” by Vincent Lepetit @VincentLepetit2 . Treasure trove of tips! Couldn’t agree more 👇
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Banter between Alyosha Efros and Antonio Torralba on nearest neighbours is all you need, circa 2010.
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Happy to share I will be an Area Chair for #ICCV2021 scheduled 🤞 to be hosted in #Montreal, #Canada 🇨🇦 (my home country)! This will be my first time serving as an AC for ICCV. #ComputerVision
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Don't forget, TODAY (May 15) at 11:00am EST is Gilbert Strang's LAST lecture. Check out the live stream!. HUGE thank you Prof. Strang, your books, lectures and enthusiasm to education in all facets have been hugely influential to me and so many others.
Prof. Gil Strang's last lecture is . Monday! Watch it via live stream:
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