Web-Based Vascular Flow Simulation Visualization with Lossy Data Compression for Fast Transmission

摘要

In this paper, we present a web-based system for visual¬ization of flow simulation results in the vascular system for use with consumer-level hardware. The presented tool allows users to design, exe-cute and visualize a flow simulation with a simple workflow on a desktop computer or a mobile device. The web interface allows users to select a vascular model, define the flow simulation parameters, execute the simu¬lation, and interactively visualize the simulation results in real time using multiple visualization techniques. The server-side prepares the model for simulation and performs the simulation using Sim Vascular. To provide a more efficient transfer of the large amounts of simulation results to the web client, as well as reduce storage requirements on the server, we introduce a novel hybrid lossy compression method. The method uses an octree data subdivision approach combined with an iterative app¬roach that regresses the data points to a B-Spline volume. The evalua¬tion results show that our method achieves compression ratios of up to 5.7 for the tested examples at a given error rate, comparable to other approaches while specifically intended for visualization purposes.