Author

Xiang-Yu Zhao

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Preprint Oct 2026

LoDEOT: Low-Dimensional and Efficient Offset Tokens for Building Footprint Extraction from Off-Nadir Imagery

Instance-level roof-to-footprint offset (RFO) prediction is central to extracting building footprints from off-nadir imagery. Query-based pipelines commonly use high-dimensional instance tokens to predict signed two-dimensional RFOs. We investigate whether RFO prediction can instead use a compact offset token. Under lo...

Kai Li, Zi-Gan Zhou, Zhen-Yang Li et al. · 0 citations

Jul 2026

ObliCity: A Benchmark and Baseline for Roof-to-Ground Projection Displacement Correction

This work reformulates DragOSM into DragRoof, an ODE-based framework inspired by human annotation behavior, and introduces the Oblique City dataset (ObliCity), the first large-scale benchmark that integrates high-resolution UAV imagery and globally distributed satellite data, covering diverse city morphologies and came...

Kai Li, Yupeng Deng, Li-Gao Deng et al. · arXiv.org · 0 citations