Mian Wei
ABSTRACT
Bend-a-rule is a physical tool and workflow that enables the robust acquisition of planar contours of 3D shape. Our work exemplifies the design of physical artifacts that subsequently aid in digital design and fabrication. Bend-a-rule is a ruler, fabricated by laser-cutting a periodic pattern on a rigid board. The ruler has unidirectional flexibility, and readily bends to conform to the shape of curved planar contours on physical 3D objects. We present a novel workflow, by which this curved planar contour can be digitally acquired from a single image of the physical ruler. The acquired contour is then used to design laser-cut accessory shapes that attach to physcial 3D objects along the digitally acquired contour. We describe the construction of Bend-a-rule, propose an automatic algorithm for the extraction of a to-scale, planar 3D curve from a Bend-a-rule image, evaluate the resulting curves in comparison to ground truth data, and show example physical 3D objects augmented using Bend-a-rule.
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Index Terms
- Bend-a-rule: a fabrication-based workflow for 3D planar contour acquisition
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