Enhanced visualization of detected 3D geometric differences

Palma G., Sabbadin M., Corsini M., Cignoni P.

Visualization  Perceptually based rendering  Rendering  Interaction  Interaction techniques  Computer Graphics and Computer-Aided Design  Scientific visualization 

The wide availability of 3D acquisition devices makes viable their use for shape monitoring. The current techniques for the analysis of time-varying data can efficiently detect actual significant geometric changes and rule out differences due to irrelevant variations (such as sampling, lighting and coverage). On the other hand, the effective visualization of such detected changes can be challenging when we want to show at the same time the original appearance of the 3D model. In this paper, we propose a dynamic technique for the effective visualization of detected differences between two 3D scenes. The presented approach, while retaining the original appearance, allows the user to switch between the two models in a way that enhances the geometric differences that have been detected as significant. Additionally, the same technique is able to visually hides the other negligible, yet visible, variations. The main idea is to use two distinct screen space time-based interpolation functions for the significant 3D differences and for the small variations to hide. We have validated the proposed approach in a user study on a different class of datasets, proving the objective and subjective effectiveness of the method.

Source: Computer graphics forum (Online) 35 (2018): 159–171. doi:10.1111/cgf.13239

Publisher: Blackwell Publishers., Oxford, Regno Unito

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