2024-03-28T23:32:35Zhttps://ipsj.ixsq.nii.ac.jp/ej/?action=repository_oaipmhoai:ipsj.ixsq.nii.ac.jp:001731252023-04-27T10:00:04Z01164:03616:08533:08880
3Dプリンター造形物への情報埋め込みと近赤外線透視像による読み出し技術Technique Using Near-Infrared Imaging for Reading Information Embedded Into Objects Fabricated With 3-D Printersjpnhttp://id.nii.ac.jp/1001/00173091/Technical Reporthttps://ipsj.ixsq.nii.ac.jp/ej/?action=repository_action_common_download&item_id=173125&item_no=1&attribute_id=1&file_no=1Copyright (c) 2016 by the Institute of Electronics, Information and Communication Engineers This SIG report is only available to those in membership of the SIG.神奈川工科大学神奈川工科大学神奈川工科大学NTTサーピスエボリューション研究所神奈川工科大学神奈川工科大学鈴木, 雅洋中村, 耕介高沢, 渓吾高嶋, 洋一烏井, 秀幸上平, 員丈筆者らが提案した 3D プリンター用デジタルデータの著作権保護技術について,3D プリンター造形物内部に埋め込まれた著作権情報の近赤外線透視像による非破壊読み出しを検討した.提案技術では,デジタルデータに埋め込まれた著作権情報を 3D プリンター造形物内部にも埋め込み,それを造形物から非破壊で読み出すことで著作権保護を可能とする.近赤外線透視像による非破壊読み出しについてのこれまでの検討では,造形物内部で著作権情報を表現する微小領域構造を目視で確認したのみであった.そこで,本研究では, 自動読み出しのためのアルゴリズムを検討した.低密度造形物の内壁に造形した微小な突起の配列で情報を表現して,配列の周囲には壁状の構造物を造形した.壁状の造形物をリファレンスとした加重平均によるシェーデイング補正を用いたアルゴリズムを検討したところ,情報を読み出すことができて, 自動読み出しが可能であることを確認した.We evaluated our previously proposed technique of protecting copyrights of digital data for 3-D printing. The proposed technique embeds copyright information into not only digital data but also objects fabricated from the data by constructing their inside with fine structure. The proposed technique also nondestructively reads the information embedded inside the objects to confirm illegal acts such as bootleg products. We had evaluated the proposed technique by examining nondestructive reading using near-infrared imaging in our previous studies. However, the experimental results in these studies had only shown that fine stmcture inside fabricated objects was seen by eyesight. Therefore, we examined an algorithm of automatic reading using near-infrared imaging in this study. The test sample used in this study was an object fabricated with low infill density. Embedded information was expressed by constructing protuberances with inner walls, and arrays of the protuberances were surrounded by the stmcture similar to walls. Near-infrared images of the test sample were analyzed by using the stmcture surrounding the arrays as a reference to calculate weighted means for shading compensation. The experimental results indicated that the embedded information was correctly recognized, and we demonstrated the feasibility of automatic reading using near-infrared imaging.AN10438399研究報告オーディオビジュアル複合情報処理(AVM)2016-AVM-9314152016-08-012188-85822016-07-28