Core Concepts
Neural radiance fields (NeRFs) are leveraged to generate realistic multi-view training data for feature detection and description models, achieving competitive performance with less training data.
Abstract
This paper introduces a novel approach using NeRFs to create a diverse multi-view dataset for training feature detectors and descriptors. The methodology adapts state-of-the-art methods to train on NeRF-synthesized views supervised by perspective projective geometry. Results show competitive or superior performance on various benchmarks with significantly less training data.
Abstract:
Learning-based methods have surpassed traditional techniques in feature point detection.
NeRFs are used to generate multi-view training data for improved model generalizability.
Proposed methodology achieves competitive performance on standard benchmarks with less data.
Introduction:
Learning-based approaches have replaced handcrafted techniques in multi-view problems.
NeRFs provide more realistic multi-view training data compared to homography-based simulations.
New dataset created from indoor and outdoor scenes using NeRFacto.
Related Work:
Focus on creating invariant representations for geometric transformations and illumination conditions.
Deep learning enables learning of invariance properties from training data.
Success of deep feature extraction in learning-based interest point detectors and descriptors.
Methodology:
NeRF dataset created for 10 scenes with synthetic images, intrinsic/extrinsic parameters, and depth maps.
Point re-projection process ensures stable re-projection around edges for foreground objects.
Implementations:
SiLK-PrP:
Trained end-to-end on the NeRF dataset with ADAM optimizer.
SuperPoint-PrP:
Trained through two rounds of Projective Adaptation on the NeRF dataset.
Experiments:
Homography Estimation:
PrP models outperform baselines on HPatches metrics but fall behind in rotation or scale invariance.
Relative Pose Estimation:
PrP models consistently surpass baseline models across all angular pose error thresholds indoors and outdoors.
Pairwise Point Cloud Registration:
SuperPoint PrP shows marginal enhancements over the baseline model, while SiLK PrP remains competitive with the baseline model.
Stats
Neural radiance fields (NeRFs) are used to synthesize novel views requiring multi-view data generation.
The proposed methodology achieves competitive performance on standard benchmarks with significantly less training data compared to existing approaches.
Quotes
"Learning-based methods have surpassed traditional handcrafted techniques."
"Our experiments demonstrate that the proposed methods achieve competitive or superior performance."