StudI/O

Abstract

Projection mapping uses a compensation technique to project images correctly on 3D buildings or real-world objects rather than on ordinary flat projection screens. In this study, we reverse this procedure in order to assist with toy block assembly and scanning methods. In order to assist with toy block assembly, our StudI/O system projects round markers on the studs of a target toy block to indicate the mounting position and direction of the block. When a user places a block in an appropriate location, the stud areas are illuminated exactly, without distortions. These markers are also useful when a user wants to disassemble his/her toy block work to scan the structure. Before removing a certain block, the user can record the size and 3D position of the block by adjusting the projected markers so that they exactly illuminate the target block. This is an effective and practical system that uses only a projector. In addition, because the user manually adjusts the positions during the assembly and scanning task, no sensing devices to detect the position of the user and toy blocks are required.