DAFU-CAD: Depth-assisted Feature Unraveling for Sketch-based Robust CAD Modeling

Sketching is a quick ideation and multimedia tool for effectively expressing design intent. By translating simple strokes into CAD models, it allows non-expert users to create editable designs, reducing the learning curve associated with traditional CAD software. However, current sketch-based CAD modeling methods are often limited to basic shapes and require structured inputs, making them less robust when dealing with varied sketch styles. To overcome these challenges, we propose a novel sketch-based modeling framework DAFU-CAD, that is both efficient and robust. Our approach features a Depth-Assisted and Feature-Unraveling sketch classification module that categorizes sketches into corresponding modeling operations, independent of their drawing style. A parameter regression and optimization module then estimates the modeling parameters, ensuring consistent and stable model reconstruction across different sketch inputs. To support this, we compile a diverse sketch dataset with a range of modeling categories and abstraction levels. Experimental results show that our method outperforms existing approaches in terms of both robustness and versatility.