A three-dimensional representation method that makes viewers perceive different surface images depending on their viewing distance

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K19830
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 62:Applied informatics and related fields
• Research Institution: Sapporo City University
• Principal Investigator: Fujiki Jun 札幌市立大学, デザイン学部, 教授 (10457418)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: 距離 / イメージ / 計算式 / 鏡

Outline of Final Research Achievements

This research aims to develop a method of expression that enables different images to be presented to viewers depending on their viewing distance. This research uses a three-dimensional structure in which flat plates with reflective properties on both sides are arranged in a horizontal row at regular intervals to form a series of laminated mirrors that present arbitrary pattern patterns from the rear direction. As a result of the research, a mathematical formula was derived to identify the relevant part of the pattern that appropriately presents the image, based on the parameters of the distance from the object to the viewer and the three-dimensional structure. We also confirmed the reproducibility of the effect and the range of limitations of the method, which is that the appearance of the 3D structure changes significantly when it is moved from the frontal position to the side.

Free Research Field

メディアアート

Academic Significance and Societal Importance of the Research Achievements

視線距離に応じたイメージ像の提示については、距離センサや距離画像が取得可能なデバイス装置の利用することで生活支援やアート・エンタテインメント分野等において応用されています。一方、心理学分野におけるハイブリッドイメージは空間周波数に対する人間の知覚特性を利用し、異なる空間周波数を持つ複数のイメージを合成することで視線距離に応じて異なるイメージを閲覧者に知覚させますがその効果は閲覧者の視力に効果が依存します。こうしたなか、本研究は閲覧者の視力に依存せず、対象から任意の距離だけ離れた閲覧者に意図するイメージ像を提示可能とする表現手法を開拓することで有効な情報提示が可能になる意義があります。