  Object locating in virtual reality (VR) has been widely used in many VR
applications, such as virtual assembly, virtual repair, virtual remote
coaching. However, when there are a large number of objects in the virtual
environment(VE), the user cannot locate the target object efficiently and
comfortably. In this paper, we propose a label guidance based object locating
method for locating the target object efficiently in VR. Firstly, we introduce
the label guidance based object locating pipeline to improve the efficiency of
the object locating. It arranges the labels of all objects on the same screen,
lets the user select the target labels first, and then uses the flying labels
to guide the user to the target object. Then we summarize five principles for
constructing the label layout for object locating and propose a two-level
hierarchical sorted and orientated label layout based on the five principles
for the user to select the candidate labels efficiently and comfortably. After
that, we propose the view and gaze based label guidance method for guiding the
user to locate the target object based on the selected candidate labels.It
generates specific flying trajectories for candidate labels, updates the flying
speed of candidate labels, keeps valid candidate labels , and removes the
invalid candidate labels in real time during object locating with the guidance
of the candidate labels. Compared with the traditional method, the user study
results show that our method significantly improves efficiency and reduces task
load for object locating.
