arXiv Machine Learning

Rethinking Amortized Neural Representations for High-Resolution Terrain Elevation Data

arXiv:2606. 00404v1 Announce Type: cross Abstract: Implicit neural representations (INRs) model a signal as a continuous coordinate-to-value function.

arXiv Machine Learning
Aug 19

ImplicitTerrainV2: Wavelet-Guided Spatially Adaptive Neural Terrain Representation

ImplicitTerrainV2 introduces a wavelet-guided, spatially adaptive neural representation for digital elevation models (DEMs). It uses a wavelet complexity field to localize high-frequency capacity to complex terrain, adaptive sampling to focus training, and gradient matching to preserve smooth manifold structure. After mixed-precision quantization and entropy coding, the model achieves 1.23 bpp with only a 0.28 dB PSNR loss, outperforming prior work by 5.70 dB while using 3.2× fewer parameters and training in 55 s per tile on a single GPU.

By Haoan Feng, Xin Xu, Leila De Floriani
arXiv AI
Sep 15

Multimodal-Multiresolution Foundation Model for Lunar Remote Sensing

The paper introduces a multimodal foundation model for lunar remote sensing, trained from scratch on SomBench—a dataset of nearly two million co‑registered tile bundles across 11 modalities at 1 m and 100 m resolutions. The model extends the TerraMind masked‑token architecture with lunar‑specific features such as explicit acquisition geometry and joint training of two spatial scales, and employs FlexiViT patch embeddings for adaptable patch sizes. Evaluation on crater detection, irregular mare patch segmentation, and polar ice prospectivity regression shows that the pretrained model matches or surpasses ImageNet‑pretrained baselines, with notable label efficiency and effective adaptation via LoRA.

By Paolo Fraccaro, Gabby Nyirjesy, Daniela Szwarcman, Himanshu Patil, Vishal Gaur, Rohit Lal, Rachel A. Slank, Geoffrey Dawson, Hiyam Debary, Michael K. Barker, Andrew Annex, Vishnu Viswanathan, Zachary Morse, Ethan I. Schaefer, Nikolaos Dionelis, Ankur Kumar, Campbell D. Watson, Manil Maskey, Rebekah I. Dawson-Rigas, Juan Bernab\'e-Moreno, Rahul Ramachandran, Sujit Roy
arXiv Computer Vision
Aug 28

SIMPLER: Efficient Foundation Model Adaptation via Similarity-Guided Layer Pruning for Earth Observation

SIMPLER is a pre‑fine‑tuning method that reduces inference and deployment costs for Earth Observation foundation models by pruning redundant layers. It uses layer‑wise representation similarity on unlabeled task data to identify and remove up to 79% of parameters without requiring gradients, magnitude heuristics, or hyperparameter tuning. Experiments on Prithvi‑EO‑2, TerraMind, and ImageNet‑pretrained ViT‑MAE show that SIMPLER retains 94% of baseline performance while achieving 2.1× faster training and 2.6× faster inference.

By V\'ictor Barreiro, Johannes Jakubik, Francisco Arg\"uello, Dora B. Heras
arXiv Computer Vision
Sep 17

Generalizable Neural Reconstruction of High-Fidelity Surfaces via Sparse Volumetric Representations

The paper introduces SVRecon, a generalizable neural surface reconstruction framework that uses sparse volumetric representations to achieve high-resolution 3D reconstruction. It employs a two-stage architecture: first predicting occupied voxels with an occupancy network, then rendering only within those regions using specialized sparse algorithms. This approach allows reconstruction at resolutions up to 512³ on 32 GB hardware, producing smoother and more precise surfaces, especially in sparse-view scenarios.

By Aoxiang Fan, Corentin Dumery, Nicolas Talabot, Ming Xu, Hieu Le, Pascal Fua