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Motion4D: Learning 3D-Consistent Motion and Semantics for 4D Scene Understanding Contributions: • We propose Motion4D, a model that integrates 2D priors from foundation models into a dynamic 3D Gaussian Splatting representation. This achieves consistent motion and semantic modeling from monocular videos. • We design a two-part iterative optimization framework comprising: - Sequential optimization, which updates motion and semantic fields in consecutive stages to maintain local consistency. - Global optimization, which jointly refines all attributes to ensure long-term coherence. • We introduce iterative motion refinement using 3D confidence maps and adaptive resampling to enhance dynamic scene reconstruction, alongside semantic refinement to correct 2D semantic inconsistencies through iterative updates with SAM2. • Our Motion4D significantly outperforms both 2D foundation models and existing 3D methods in tasks including video object segmentation, point-based tracking, and novel view synthesis.
Paper: https://t.co/WFqbtsThCk Project: https://t.co/SEmM7IIDB5


Whenever I see programmer salary numbers from Europe, I always have to do a double take. It's hard to fathom that we work in the same industry. With bonuses this year, many of our folks are at $400,000+, and we're not even in any AI-hype sector.
Father of three, Creator of Ruby on Rails + Omarchy, Co-owner & CTO of 37signals, Shopify director, NYT best-selling author, and Le Mans 24h class-winner.


RT @TechFundies: Databricks held a webinar on agentic AI with 3 large enterprise CIOs / AI specialists. My punchline takeaway is that agen…
Professor at NYU. Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.


in retrospect, something i like with our synth announcement: we never mention france or the eu. for all mankind.
Artisanal baker of reasoning models @pleiasfr


in retrospect, something i like with our synth announcement: we never mention france or the eu. for all mankind.
Artisanal baker of reasoning models @pleiasfr


in retrospect, something i like with our synth announcement: we never mention france or the eu. for all mankind.
Artisanal baker of reasoning models @pleiasfr
