MiCADangelo: Fine-Grained Reconstruction of Constrained CAD Models from 3D Scans

Ahmet Karadeniz (University of Luxemburg) · Dimitrios Mallis (University of Luxemburg) · Danila Rukhovich (Institute of Mechanics) · Kseniya Cherenkova (SnT, University of Luxemburg) · Anis Kacem (SnT, University of Luxembourg) · Djamila Aouada (SnT, University of Luxembourg)

2d patternscad reverse engineeringcomputer-aided designeditable cad modelsfine parametric detailsgeometric detailsgeometry-driven methodshuman designersmulti-plane cross-sectionsparametric representationsreconstruction processsketch-level constraintsstate-of-the-art methodstop-down strategies

Computer-Aided Design (CAD) plays a foundational role in modern manufacturing and product development, often requiring designers to modify or build upon existing models. Converting 3D scans into parametric CAD representations—a process known as CAD reverse engineering—remains a significant challenge due to the high precision and structural complexity of CAD models. Existing deep learning-based approaches typically fall into two categories: bottom-up, geometry-driven methods, which often fail to produce fully parametric outputs, and top-down strategies, which tend to overlook fine-grained geometric details. Moreover, current methods neglect an essential aspect of CAD modeling: sketch-level constraints. In this work, we introduce a novel approach to CAD reverse engineering inspired by how human designers manually perform the task. Our method leverages multi-plane cross-sections to extract 2D patterns and capture fine parametric details more effectively. It enables the reconstruction of detailed and editable CAD models, outperforming state-of-the-art methods and, for the first time, incorporating sketch constraints directly into the reconstruction process.