arXiv AI By Yeobin Hong, Hyojun Go, Dohun Lee, Jeongjae Lee, Sunghwan Hong, Federico Tombari, Zhaochong An, Jong Chul Ye, Konrad Schindler, Dominik Narnhofer

GeoFix: Geometry Fixing for 4D Consistent Generation

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arXiv Computer Vision
Oct 9

WorldAlign: Decoupled 4D Reward for World-Consistent Video Generation

WorldAlign introduces a decoupled 4D reward framework for improving world consistency in generated videos. It separates static regions from dynamic subjects, aligning each with a suitable world prior—geometric priors for static geometry and a vision‑language model for dynamic subjects—using masked reprojection and a VLM‑as‑a‑judge reward. The method enhances both static and dynamic consistency in pretrained image‑to‑video generators without relying on human preference data.

By Jing He, Kaixin Ding, Xingye Tian, Guibao Shen, Wenhang Ge, Xin Tao, Pengfei Wan, Ying-Cong Chen
arXiv AI
Oct 5

LoGo: Local-Global Rewards for Consistent Long-Horizon Video Generation

LoGo introduces a hybrid reward system combining global and spatially localized rewards to improve 3D consistency in camera-controlled video generation. The local reward offers fine-grained credit assignment, reducing object shifts and artifacts, while the global reward maintains camera following and overall video quality. Evaluations on DL3DV and the new TrajectoryBench benchmark demonstrate LoGo’s advantage over existing post-training techniques.

By Ziqi Ma, Shreya Sharma, Mohamed El Banani, Katja Schwarz, Chongjie Ye, Chao-Yuan Wu, Li Fei-Fei, Ben Mildenhall, Georgia Gkioxari, Justin Johnson, Gowthami Somepalli
arXiv AI
Jun 9

VideoGPA: Distilling Geometry Priors for 3D-Consistent Video Generation

arXiv:2601. 23286v4 Announce Type: replace-cross Abstract: While recent video diffusion models (VDMs) produce visually impressive results, they fundamentally struggle to maintain 3D structural consistency, often resulting in object deformation or spatial drift.

By Hongyang Du, Junjie Ye, Xiaoyan Cong, Runhao Li, Jingcheng Ni, Aman Agarwal, Zeqi Zhou, Zekun Li, Randall Balestriero, Yue Wang