Visual Guide to Improving Depth Perception in See-Through Visualization of Laser-Scanned 3D Point Clouds

The activity of saving and utilizing cultual heritage items as digital data by three-dimensional (3D) measurement is called digital archive. Digital archiving requires visualization that is accurate and easy for the observer to understand the structure. Therefore, visualization combining see-through visualization and stereoscopic presentation is considered effective. In previous studies, it has been reported that the depth is perceptually underestimated in see-through stereoscopic vision of 3D point clouds. In this research, in order to solve the problem, we propose an edge highlighting method for the 3D structure of data and show its effectiveness by an evaluation experiment. Moreover, in this research, new depth information is added by applying the method of dashed lines to the extracted edge. We conduct another evaluation experiment and show that these dashed lines have influences on perceived depth.