1. Structure-Aware Lighting Design for Volume Visualization
Perceptual structural differences between images rendered with and without external lighting in direct volume rendering
without external lighting
with external lighting
SSIM
HWSD
Homogeneity-Weighted Structural Dissimilarity Metric (HWSD)

2. Structure-Aware Lighting Design for Volume Visualization
Lighting characteristics based on SSIM and HWSD
Lighting goodness, lighting similarity, lighting stability
Structure-aware automatic lighting design approach
light position sphere
one optimal light
two optimal lights
optimal light parameters