Stereo and motion cues effect on depth perception of volumetric data

Abstract

; "Stereo and motion cues effect on depth judgment of volumetric data," Stereoscopic Displays and Applications XXV (SD&A2014),. IS&T / SPIE Electronic Imaging 2014, Vol. 9011, February 2-6, 2014. Stereo and Motion Cues Effect on Depth Perception of Volumetric DataIsaac Cho, Zachary Wartell, Wenwen Dou, Xiaoyu Wang and William Ribarsky Charlotte Visualization Center, University of North Carolina at Charlotte, Charlotte, NC, USA 28213-0001 ABSTRACTDisplays supporting stereoscopic and head-coupled motion parallax can enhance human perception of containing 3D surfaces and 3D networks but less for so volumetric data. Volumetric data is characterized by a heavy presence of transparency, occlusion and highly ambiguous spatial structure. There are many different rendering and visualization algorithms and interactive techniques that enhance perception of volume data and these techniques' effectiveness have been evaluated. However, how VR display technologies affect perception of volume data is less well studied. Therefore, we conduct two formal experiments on how various display conditions affect a participant's depth perception accuracy of a volumetric dataset. Our results show effects of VR displays for human depth perception accuracy for volumetric data. We discuss the implications of these finding for designing volumetric data visualization tools that use VR displays. In addition, we compare our result to previous works on 3D networks and discuss possible reasons for and implications of the different results.

Reevaluating Reconstruction Filters for Path‐Searching Tasks in 3D

“…The results are, however, within the range of depth discrimination tasks using stereoscopic DVR with angiography‐like data sets. [CWD*14] reports 67.59%, [RSH06] reports approximately 72% and [KOCC14] reports 64.8%. The differences suggest that surface–base renderings, as used in the previous path‐searching tasks, produce less ambiguity, and therefore the use of low opacity must be carefully considered when using DVR.…”

“…Similarly, for a similar task performed by novices and experts, Kersten reports that enhanced monoscopic depth cues were capable of producing better results than stereo [KOCC14]. In [CWD*14], in contrast, for depth discrimination, tasks using simulated angiography‐like data sets stereoscopic displays proved more effective in most cases against 2D displays. Recently, [ABKP15] investigated methods to enhance MR angiography images by combining contour enhancement with stereopsis for DVR.…”

“…Whilst the use of noise simulates some properties of real data sets, the use of a single large cylinder is abstract. By using multiple overlapping cylinders, a more realistic data set can be produced reminiscent of blood vessels, in which case participants are required to determine the correct depth ordering of the cylinders [CWD*14, BBD*09].…”

Quality measures of reconstruction filters for stereoscopic volume rendering

“…These include the depth ordering evaluations of Refs. [1,3] where volume rendered cylinders were displayed and participants had to find their ordering, as well as the more common relative depth tasks requiring participants to find which highlighted feature is closest to themselves [16,17], and path-searching tasks [11,18]. These studies give values using the task's accuracy rates to compare the quality of one rendering method or display system over another but do not give any information as to how participants perceive any visual differences.…”

“…This can lead to conflicting depth information and can make it difficult for observers to understand the detailed layout of the objects in the scene. Several attempts have been made to aid in the understanding of depth in images produced by direct volume rendering (DVR), including the analysis of semitransparency [1,2] as well as the use of stereoscopic displays [3][4][5].…”