三次元ハンディスキャナによる歴史的衣服資料のシルエット計測: レーザー光を用いた光学式三次元計測装置との比較を通して

摘要

With the purpose being to efficiently create the reproduction of clothing as historical materials, an image analysis was conducted with a large three-dimensional measurement instrument (BLS) by means of laser light for clothing with a large billowing due to easing-in, and an attempt was made to grasp this objectively and quantitatively with the silhouette of the clothing as the volume value, and were reported in the previous paper. However, BLS is a large-scale equipment and that cannot measure clothes of dark color, in this study, the reproducibility and effectiveness of silhouette measurements using a small hand-held three-dimensional scanner (HS) with a pattern light were investigated through a comparison with the data obtained by BLS. For the torso measurements, the rate of change of the HS measurement values was seen to have a good reproducibility of approximately 1%, In the measurement by HS, it can be seen that the unevenness and marks that serve as the clues for the alignment of the scan data are needed, and it was proposed attaching thread marks that gives due consideration to not leaving any traces on the clothing and that does not alter the shape of the silhouette be used on the cloth. A high degree of congruence was observed between Hm, the volume value measured with HS attaching thread marks, and B, the volume value measured with BLS.%筆者らは，歴史資料としての衣服の複製を効率的に制作することを目的に，いせこみによる大きなふくらみをもつ衣服について，レーザー光による大型の三次元計測装置(BLS)を用いて画像解析を行い，衣服のシルエットを体積値として客観的•数量的に把握する方法を，既報において提案した.しかし，BLSは，大掛かりな機器であることや，暗色系の衣服の計測ができないことから，本研究では，小型の三次元ハンディスキャナ(HS)を用いたシルエット計測の有用性について，BLSから得られるデータとの比較を通して検討した.ボディを対象としたシルエット計測において，HSによって得られた体積値の変動率は約1%で再現性が良いことがわかった.HSによる計測においては，スキャンデータの位置合わせの手掛かりとなる凹凸や目印が必要であることがわかり，衣服に跡を残さずかつシルエットを変形させないよう配慮した糸印をつけることを提案した.糸印をつけたHSの体積値HmはBLSの体積値Bとの間に高い一致がみられた.