SUFLECA: Scaling Up Feature Learning for CAD-to-image Alignment

• URL: http://arxiv.org/abs/2607.15058v1
• Date: Thu, 16 Jul 2026 14:32:34 GMT
• Title: SUFLECA: Scaling Up Feature Learning for CAD-to-image Alignment
• Abstract summary: CAD-to-image alignment aims to estimate an object's 9D pose from a single RGB image.<n>Recent zero-shot methods use visual foundation models to match image regions to CAD models.<n>We introduce SUFLECA, a weakly-supervised framework for zero-shot CAD alignment.
• Score: 8.675679091961213
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: CAD-to-image alignment aims to estimate an object's 9D pose (rotation, translation, and anisotropic scale) from a single RGB image, enabling applications in robotics and augmented reality. Recent zero-shot methods use visual foundation models to match image regions to CAD models, yet typically their correspondences are appearance-driven and degrade under occlusion or sim-to-real domain shift. To address these limitations, we introduce SUFLECA (Scaling Up Feature LEarning for CAD Alignment), a weakly-supervised framework for zero-shot CAD alignment with two key contributions. First, SUFLECA scales up geometry-grounded feature learning from pretrained visual representations through Normalized Object Coordinates (NOCs) supervision on 674K images spanning 12 real and synthetic datasets, learning compact geometry-aware features that generalize across domains. Second, we propose a geometrically consistent matching algorithm that establishes reliable one-to-one CAD-to-image correspondences. Together, these contributions enable accurate, sub-second alignment per object instance without iterative pose refinement. On ScanNet25k, SUFLECA achieves 33.4%/42.3% category/instance accuracy, outperforming, with a smaller computational footprint, the strongest zero-shot baseline by 10.3/12.2 percentage points and, for the first time on this benchmark, even surpassing fully supervised methods. Code is available at: https://github.com/snt-arg/SUFLECA

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