Introducing *Edit-by-Track*, a framework that enables precise video motion editing via 3D point tracks. Our method supports a wide range of motion editing applications, including object removal, shape deformation, dynamic view synthesis, and many more! Video explainer: youtu.be/aAj6PIgx20o

Wondering how DeepSeek v3.2 rivals SOTA models (e.g., GPT5/Gemini 3 pro) while being ~30x cheaper? 🤔 Let's learn how the base model works! We'll focus on attention, the need for KV caching, and key ideas for improving attention (MQA/GQA/MLA/DSA). youtu.be/Y-o545eYjXM

Sharing the slides for a talk on faculty job search Hope it's helpful to people exploring and preparing for the process. Feedback is welcome! www.dropbox.com/scl/fi/p7xdt...

How to organize your talk? I used to present like this, thinking that I was being "academic", "organized", and "professional". BUT, from the audience's viewpoints, this sucks. 😱 Look how far they need to hold a long-term context to just make sense of what you're saying!

Muon is a (relatively) new optimizer that powered large-scale training of recent foundation models, e.g., Kimi K2 and GLM 4.5. Interested in learning how it works? Check out the video here: youtu.be/bO5nvE289ec

How AI Taught Itself to See Self-supervised learning is fascinating! How can AI learn from images only without labels? In this video, we’ll build the method from first principles and uncover the key ideas behind CLIP, MAE, SimCLR, and DINO (v1–v3). Video link: youtu.be/oGTasd3cliM

New video! A quick dive into the recent Hierarchical Reasoning Model (HRM) through the lens of algorithm synthesis. Check it out: youtu.be/RK7lysjz_G0

Diffusion LLMs are promising ways to overcome the limitations of autoregressive LLMs. Less error propagation, easier to control, and faster to sample! But how do Diffusion LLMs actually work? 🤔 In this video, let's explore some ideas on this fascinating topic! youtu.be/8BTOoc0yDVA

In an era of billion-parameter models everywhere, it's incredibly refreshing to see how a fundamental question can be formulated and solved with simple, beautiful math. - How should we orient a solar panel ☀️🔋? - Zero AI! If you enjoy math, you'll love this! Video: www.youtube.com/watch?v=ZKzL...

Why is the "Title and Content" slide layout BAD? Most people prepare their presentation from this default layout. I used it for years without questioning it. BUT, this essentially guides you toward developing poor presentation. Why? 🤔

Kids’ summer camp just kicked off, and that means... I finally have time to make new videos! What topics are you most interested in right now?

Why More Researchers Should be Content Creators Just trying something new! I recorded one of my recent talks, sharing what I learned from starting as a small content creator. youtu.be/0W_7tJtGcMI We all benefit when there are more content creators!

Fresh out of the oven! 🍞 @jbhuang0604.bsky.social breaks down Mean Flow from Kaiming’s group in his latest video. Video: youtu.be/swKdn-qT47Q?...

Policy gradient methods rock! These are the core techniques for making your transformer "chat" and "reason", a robot that manipulates objects, and a drone that maneuvers in a complex environment. BUT, how do we learn all the developments in the past 30+ years?

Awesome! 🤩 So glad to hear the authors enjoyed the video, totally made my day!

We had a blast at CVPR2025! There was so much to learn! I am particularly excited to meet many new friends and reconnect with old ones. I feel energized. Already looking forward to the next one!

Kullback–Leibler (KL) divergence is a cornerstone of machine learning. We use it everywhere, from training classifiers and distilling knowledge from models, to learning generative models and aligning LLMs. BUT, what does it mean, and how do we (actually) compute it? Video: youtu.be/tXE23653JrU

My X/Twitter account has been hacked... Please don't believe what they said! Trying to get it back in the meantime. Sorry for the inconvenience!

RL is so back! Reinforcement learning is a key driver in aligning LLMs and enhancing their reasoning capabilities. BUT, it’s a tricky topic to wrap your head around (at least for myself 😵‍💫). So, I put up a video breaking down the basics in a way that clicked for me. I hope it helps you, too!

I find TRPO's idea of learning from others' experiences fascinating. So, I started running TRPO for my group, making all (previously individual) feedback on experiments, writing, rebuttals, and presentations public. Now everyone gets to learn from each other’s trajectories!

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Exploration is key for robots to generalize, especially in open-ended environments with vague goals and sparse rewards. BUT, how do we go beyond random poking? Wouldn't it be great to have a robot that explores an environment just like a kid? Introducing Imagine, Verify, Execute (IVE)!

Solving high-impact real-world problems with multimodal foundation models

Check out UrbanIR - Inverse rendering of unbounded scenes from a single video! It’s a super cool project led by the amazing Chih-Hao! @chih-hao.bsky.social is a rising star in 3DV! Follow him! Learn more here👇

Interesting! I didn't realize how important a video title/packaging is until now. It's the same video, but with a better packaging it gets much more attention.

How a 40-Year-Old Trick Solves Seamless Image Blending Laplacian pyramid blending is a simple yet effective tool for many applications, including object composition, seamless panorama stitching, and exposure fusion. Let’s learn this classic method that still works so well today.

Fifth year grad students to incoming ones at the prospective student visit day:

How to schedule your thesis defense? So you think publishing top-tier papers is hard? Wait until you need to schedule your prelim/defense! Some common mistakes and tips:

Amid all the super-duper research advances, I am excited to share my video on a super-duper basic topic: How to sample your signals? Here we discuss sampling, why aliasing occurs, and how to prevent it. It's fascinating to view this through the lens of frequency analysis. youtu.be/fTJjPGaPsq4

computer vision researchers’ conversations with friends be like

The real challenge of a PhD defense is to get five academics to agree that they will show up in the same room at the same time.

How does Template Matching Work? Template matching is a crucial technique for detecting and locating objects in images. It is widely applied in object recognition, medical imaging, and quality inspection. Let's build the algorithm and use it to find Waldo! Full video: youtu.be/EO1-MCWfXCU

Yay! Expressive Text-to-Image Generation with Rich Text now has a journal version (in IJCV 2025)! rich-text-to-image.github.io

How Blur Filters Work? Blur filters reduce noise, extract image structures across scales, and create beautiful shallow depth-of-field effects. But HOW and WHY do they work? Let's find out together! Full video: youtu.be/xvDeFABiwrg

Protip: How to cheer up grad students

This is arguably the most interesting workshop! Looking forward to learning more there!

How do we go beyond colors and recover the intrinsic scene properties? 🤔 👁️ IRIS: Inverse Rendering of Indoor Scenes IRIS estimates accurate material, lighting, and camera response functions given a set of LDR images, enabling photorealistic and view-consistent relighting and object insertion.

Live view of the AI/ML grad school application process

How can we reconstruct 3D objects under *extreme lighting variations*? ☀️🌤️🌥️🌆🌃 How about ... 🤔 appearance embedding? BUT it cannot capture view-dependent appearances. 🤔 inverse rendering? BUT it suffers from ambiguities. 💡 Our idea: Relighting comes to the rescue!

As my kids are singing APT non-stop these days, I did a bit of reverse engineering of the APT music video and tried to understand why the MV is so addictive. Here is what I learned.

3D illusions are fascinating! 🤩 But it takes exceptional artistic skills to make one. We present Illusion3D - a simple method for creating 3D multiview illusions, where the interpretations change depending on your perspectives. Let's play Where's Waldo, shall we? 😆

Vaibhav, one of the undergrad students on this project, is looking for a research-oriented MS program. He is concerned about whether his profile is sufficiently competitive for a PhD program (due to a lack of pubs). He is awesome! You'd be crazy not to admit him into your program.

3D illusions are fascinating! 🤩 But it takes exceptional artistic skills to make one. We present Illusion3D - a simple method for creating 3D multiview illusions, where the interpretations change depending on your perspectives. Let's play Where's Waldo, shall we? 😆

Things you should avoid saying during your presentation ... and the brutally honest thoughts of your audience. 🧵

I will be teaching a 1-credit course. It is a course for first-year PhD students at UMD CS. What are the essential skills/knowledge should we teach in that course?

How to schedule a meeting? When you ask for a meeting with others, you are asking for their time. You are asking for their most valuable, finite resource to benefit yourself (e.g., for advice, networking, questions, and opportunities). Here are some tips that I found useful.

How to design your presentation? Presentation is an essential skill for academics. After attending so many meetings, prelims, thesis defenses, research talks, and lectures, I’ve realized that I may have been approaching it all wrong ... Some (bitter) lessons I learned. 👇

Every night, my kids ask me to stay in bed for three minutes before they sleep. Sometimes, I feel anxious with work waiting. Last night, my little one said, 'I can sleep alone now. Good night.' It hit me. I suddenly realized that these little moments won't last forever.

POV: me getting on social media

I am thrilled to participate in the #3DV2025AMA series! Happy to answer any questions!