OptiTrack made by Natural Point was used as a motion sensor system for motion tracking. Two computer servers for motion tracking and real-time image generation, respectively, are used for the virtual aquarium system. In order to reflect user's actual motions, we set up a 7 m × 7 m space where motions can be tracked by motion tracking equipment and painted the floor and walls green for the sake of real-time image composition. In this system, a total of 10 reference gestures have been defined for the sake of interactions with the fish in the virtual aquarium (Figure 3). ![]() ![]() Procrustes analysis makes input gestures optimally overlapped on reference gestures by appropriately conducting operations like translating, rotating, and scaling on the input gestures. ![]() This is because their 3D positions and directions do not correspond at all as the user does not look in a certain single direction but does freely move about in the virtual gesture space. In order to compare current input gestures and reference gestures, we should compare the two types of gestures to clarify how similar they are, but it is difficult to simply compare the two. Here, Procrustes analysis is used as a method to compare current input gestures with reference gestures. When the length corresponds to the number of samples, it is examined whether it corresponds to the relevant reference gestures. For this, the system provides the functions of marker-based motion tracking with sensors, recognition of user's motions, real-time actual image rendering, and multiview to realize a system to simulate more intuitive and natural virtual space interactions, which can be used for the construction of motion-based realistic/experiencing systems, which increasingly attract interest.įor gesture sensing, the number of 3D samples from hands motion tracking taken successively from the user is compared with the length of the trajectory composing all the reference gestures. Also, the system allows audiences to share experiences by providing them with virtual synthetic images from a third-person perspective including a user after taking the user in the real space with a camcorder on which motion tracking markers are attached. These images are transmitted to the user's immersing image devices. ![]() We attach markers on users and camera devices in a real space designed in the one-to-one size as the virtual space to trace user and camera motions, which is reflected in real time to generate virtual world images. A virtual reality system needs more natural and intuitive interfaces so as to enhance users' immersion. We realized a real space-based virtual aquarium equipped with a multiview function that provides images for users and audiences at the same time through motion tracking sensors. All subjects Allied Health Cardiology & Cardiovascular Medicine Dentistry Emergency Medicine & Critical Care Endocrinology & Metabolism Environmental Science General Medicine Geriatrics Infectious Diseases Medico-legal Neurology Nursing Nutrition Obstetrics & Gynecology Oncology Orthopaedics & Sports Medicine Otolaryngology Palliative Medicine & Chronic Care Pediatrics Pharmacology & Toxicology Psychiatry & Psychology Public Health Pulmonary & Respiratory Medicine Radiology Research Methods & Evaluation Rheumatology Surgery Tropical Medicine Veterinary Medicine Cell Biology Clinical Biochemistry Environmental Science Life Sciences Neuroscience Pharmacology & Toxicology Biomedical Engineering Engineering & Computing Environmental Engineering Materials Science Anthropology & Archaeology Communication & Media Studies Criminology & Criminal Justice Cultural Studies Economics & Development Education Environmental Studies Ethnic Studies Family Studies Gender Studies Geography Gerontology & Aging Group Studies History Information Science Interpersonal Violence Language & Linguistics Law Management & Organization Studies Marketing & Hospitality Music Peace Studies & Conflict Resolution Philosophy Politics & International Relations Psychoanalysis Psychology & Counseling Public Administration Regional Studies Religion Research Methods & Evaluation Science & Society Studies Social Work & Social Policy Sociology Special Education Urban Studies & Planning BROWSE JOURNALS
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