From: Partially sparse imaging of stationary indoor scenes
Material
ϵ′
ϵ″
Brick
3.8
0.24
Concrete
6.8
1.2
Glass
6.4
0
Wood
2.5
0.05
Sheetrock
2.0
Foam cushion and fabric
1.4
Ground
10
0.6
Human
50
12