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Embedding Information in 3D Printed Objects with Curved Surfaces Using Near Infrared Fluorescent Dye

Authors:
Piyarat Silapasuphakornwong
Hideyuki Torii
Kazutake Uehira
Siravich Chandenduang

Keywords: 3D printer, information hiding, near infrared light, fluorescent dye

Abstract:
This paper presents a technique to embed barcodes in the curved surfaces of objects fabricated with a 3D printer. The objects are fabricated using resin material, and the barcodes patterns inside an object are formed using the same resin material as other regions but containing a small amount of fluorescent dye. When these objects are irradiated with near-infrared rays, fluorescent dyes are excited, and they emit near-infrared fluorescence. Therefore, the internal barcode patterns can be captured as high-contrast images using a near-infrared camera, and the information expressed by the barcodes inside the objects can be nondestructively read out. We conducted experiments to demonstrate that this technique can also be applied to objects with curved surfaces. A sample was prepared using a 3D printer with two-head fused deposition modeling. The experimental results show that we can hide a barcode inside an object so that no one can see it from the outside and that we can decode all barcodes correctly with 100% accuracy.

Pages: 19 to 23

Copyright: Copyright (c) IARIA, 2020

Publication date: February 23, 2020

Published in: conference

ISSN: 2308-4448

ISBN: 978-1-61208-772-6

Location: Lisbon, Portugal

Dates: from February 23, 2020 to February 27, 2020