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About this paper
Jeongeun Park, Janghyeok Han, Geonung Kim, Hyun-Seung Lee, Kyuha Choi, Youngseok Han, Sunghyun Cho
HL-OutPaint, a framework developed by POSTECH and Samsung Electronics researchers, proposes a two-stage coarse-to-fine approach for high-resolution, long-range video outpainting. This method synthesizes spatio-temporally coherent content across large spatial extrapolations and extended video durations, achieving superior visual fidelity and consistency compared to existing techniques.
Key insights
- A coarse-to-fine approach effectively decouples global structural establishment from high-resolution detail synthesis, enabling coherence over large spatio-temporal extents.
- Integrating information from both global keyframes and local temporal windows through a 'global-local frame swapping' mechanism is crucial for maintaining long-term structural consistency and short-term motion integrity.
- Joint spatio-temporal compression in the Global Coarse Guidance (GCG) is essential for stable and coherent outpainting, preventing artifacts like disappearing objects or structural repetitions.
Summary by alphaXiv.
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