arXiv AI By Mingzhi Xu, Tao Zhou, Yong Li, Yizhe Zhang

Spatial Lifting for Dense Prediction

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Spatial Lifting (SL) is a new method for dense prediction that lifts 2D inputs into a higher-dimensional space and processes them with networks suited to that dimension, such as a 3D U‑Net. This dimensionality lifting surprisingly yields competitive performance while cutting inference costs and dramatically reducing model parameters. The SL framework naturally produces structured outputs along the lifted dimension, enabling dense supervision during training and single‑forward‑pass self‑consistency‑based quality and uncertainty estimation at test time.

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