Wataru Hashimoto

Verification of Stereoscopic Effect Induced Parameters of 3D Shape Monitor Using Reverse Perspective

In the field of optical illusion, reverse perspective is used to draw a scene that is opposite to the actual perspective. When the viewing position is changed, a farther object seems to be always coming toward and following the viewer instead of going away. Therefore, we considered whether the reverse perspective can be applied to a dynamic representation of computer animation using multiple combined monitors. In this research, we arranged three monitors in the shape of a corner cube and tried to determine whether the viewer can recognize the concave corner of the cube as the convex corner through the reverse perspective illusion. Furthermore, we developed a virtual environment that enabled us to simulate the reverse perspective illusion by changing the position, angle, and shape of the screen using a head-mounted display and controllers.

Generating Training Images Using a 3D City Model for Road Sign Detection

In order to prevent traffic accidents due to mistakes in checking road signs, a method for detecting road signs from an image shot by an in-vehicle camera has been developed. On the other hand, Deep Learning which is frequently used in recent years requires preparing a large amount of training data, and it is difficult to photograph road signs from various directions at various places. In this research, we propose a method for generating training images for Deep Learning using 3D urban model simulation for detecting road signs. The appearance of road signs taken in the simulation depends on the distance and direction from the camera and the brightness of the scene. These changes were applied to Japanese road signs, and 303,750 types of sign images and their mask areas were automatically generated and used for training. As a result of training YOLO detectors using these training images, in detection for some road sign class groups, the F values of 66.7% to 88.9% could be obtained.

Projection Simulator to Support Design Development of Spherical Immersive Display

This research aims to develop a simulator that supports the construction of a spherical immersive display, which is a system that can provide a realistic presence, as if the user exists in another space. In general, when developing a display, it is necessary to perform optical design of the projection system in considering special distortion correction on the dome screen. However, accuracy of the optical system that is actually manufactured is not guaranteed to be when it is simulated, and fine adjustment is again necessary when the display is used. In this research, we report on the development of a projection simulator that can perform optical system adjustment and distortion correction simultaneously during optical design of the projection system.