Laser scanning technology has been used to acquire point cloud data of real-world objects and has been utilized in various fields. In the field of cultural heritages, digital archiving is an activity in which cultural heritages are digitized, preserved, and utilized. Visualization of these data can help us to understand the complicated internal structure of such cultural heritages. Especially, transparent multi-view 3D visualization based on 3D point clouds is effective for understanding their complicated 3D structure. However, the position and depth information may become unclear when three-dimensional data are rendered transparently. We examined whether the proposed method of visualizing structures by edge highlighting information affects depth perception of transparent multi-view 3D objects. We also examined the effect of edge opacity on depth perception. We tested two types of figures: vertically and horizontally combined shapes and diagonally combined shapes, which were extracted from the point cloud data of cultural heritages. We conducted psychophysical experiments, and the results suggest that edge highlighting improves the accuracy of depth perception in the two data sets. Moreover, the effect of edge highlighting was more significant when in depth cues such as binocular disparity and motion parallax were available
