Transparent Object Reconstruction via Coded Transport of Intensity
Supplemental Video
Paper ID: 846
Turb
ulen
ce /
Gas
Flam
eW
ater
Glas
s
Transparent Objects
Aero
nauti
cal
Engi
neer
ing
ApplicationsGr
aphi
c Re
nder
ing
Live
Cel
l Im
agin
g
Light Field Probes
Intrusive Methods
Wet
zste
in e
t al.,
ICCP
201
1
Schlieren Imaging
Yu e
t al.,
CVP
R 20
13At
ches
on e
t al.,
SIGG
RAPH
Asia
200
8
Impe
rical
Col
lege
Lod
on
Hulli
n et
al.,
SIG
GRAP
H 20
08Tr
ifono
v et
al.,
EGS
R 20
06Related Work
Non-intrusive Methods
Collimated Coded Illumination
Moveable Sensor PlaneObject
Our Method
We propose to reconstruct transparent object using two different intensity projections based on transport of intensity equation.
Transport of Intensity
( ) ( ( ) ( , ) )c
I x I x n x z dsz x
In Volumetric Object Case: In Thin Object Case:
( ) ( ( ) ( ))I x I x n xz x
( ) ( , )v
zz
I x v l x v dvz x
Obtaining Outgoing Light Field via Transport of Intensity Equation
Collimated Coded Illumination
Moveable Sensor PlaneObject
Estimate Ray-ray Correspondences Using Spatial Intensity Codes
Light Path ApproximationCollimated
Coded IlluminationMoveable
Sensor PlaneObject
( )I x const ( )I x CodedPattern
Tomographic Volume ReconstructionCollimated
Coded IlluminationMoveable
Sensor PlaneObject
Rotating
Diffe
rent
pers
pecti
ves
3D V
olum
e
Collimated Coded Illumination Moveable Sensor Plane
Object
Sensor 1
Sensor 2
Illumination 2
Illumination 1
Sensor 3
Illumination 3
Dynamic Volume Reconstruction
…
……
…
Experimental Results
Simulation Results: Thin refractive objectSi
mul
ation
Setti
ngRe
cons
truc
tion
Target Object
Simulation Results: Homogeneous Volume
Reconstructed 2D Projections of 3D Refractive Index Field
Simulation Results: Homogeneous Volume
Reconstructedvolume
Target Object
Simulation Results: Inhomogeneous Volume
Reconstructed Isosurface and Refractive Index Field
Target Object
Our Prototype
ProjectorRefractive sample
CollimatinglensCamerasBeam splitter
& screens
Prototype Result: Thin refractive objectTa
rget
Obj
ect
Reco
nstr
ucte
dRe
nder
ed
Prototype Result: Dynamic refractive index fields
Targ
et O
bjec
t
Reco
nstr
ucte
d
Imag
e Pa
irs
Imag
e Pa
irs
Prototype Result: Refractive Volumetric Reconstruction
Reco
nstr
ucte
dvo
lum
e
Targ
et O
bjec
t
Reconstructed Refractive Index
Surface Reconstruction
-90° -45° 0° 45° 90°