![]() ![]() Similarly, Verifiable Smart Packaging uses radio-frequency signals that penetrate through an object's exterior to identify the object by its internal structure. As an example of natural unobtrusive tags, SensiCut senses the micron-scale surface structure of materials using speckle sensing to identify the material's type. To achieve unobtrusive passive tags that do not require object modification, researchers investigated ways to use the inherent characteristics of objects, which may manifest in the form of either naturally occurring or engineered features. ![]() Even though these approaches are relatively low-cost, the barcodes may take away the attention from the physical object itself due to its obtrusiveness, and are typically not as durable as other tags like RFID . Tagging 3D objects without electronics usually involves sticking 1D barcodes and QR codes onto them or carving, printing, or engraving the code patterns directly onto their surfaces . In our mechanical evaluation, we show that StructCodes preserve the structural integrity of laser-cut objects.Īttached to objects for identification, tags are an important part of our everyday lives and used for many applications in packaging , shipping , robotics , and manufacturing. We present and evaluate a tag decoding pipeline that is robust to various backgrounds, viewing angles, and wood types. We demonstrate StructCode through use cases for augmenting laser-cut objects with data such as labels, instructions, and narration. StructCode modifies the lengths of laser-cut finger joints and/or living hinges to represent bits of information without introducing additional parts or materials. We introduce StructCode, a technique to store machine-readable data in laser-cut objects using their fabrication artifacts.
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