View angle evaluation of a first-person video to support an object-finding task
Takahiro Ueoka, Tatsuyuki Kawamura, Yasuyuki Kono, Masatsugu Kidode · NAIST Digital Library (Nara Institute of Science and Technology) · 2005
The aim of this paper is to investigate an effective view angle of “a first-person video” when a user tries “an object-finding task”, a task to find a target object in his/her everyday environment. The first-person video means a video recorded by a head-mounted camera of a wearable system worn by the user. The objectfinding task can occur when the user forgets where he/she last placed the target object. The first-person video can include some contexts of the event. There are two important contexts required by the user to find the target object; one is “the action” that he/she placed the target object, and the other context is “the location” that the object was placed. The view angle of a lens, which is employed by the camera device, affects the width and the time length of the first-person video. It is important to investigate appropriate range of the angle so that the user can recognize those contexts by watching the first-person video. We conducted experiments that subjects evaluate videos in several width of the angle. We then found that the range of the view angle is from 115 to 125 in degree.