Real world scenes with multiple global illumination effects

Fruit Basket

Depth-maps
Errors due to inter-reflections
Errors due to inter-reflections
Errors due to sub-surface scattering
Conventional Gray Codes
(11 images)
Phase Shifting
(18 images)
Modulated Phase Shifting
(162 images)
Our Code Ensemble
(41 images)
This scene has both inter-reflections (corner of the fruit-basket) and sub-surface scattering on the fruits. Conventional Gray codes and phase-shifting result in errors due to inter-reflections. On the other hand, modulated phase shifting produces errors on the translucent fruits due to low direct component. Our technique using an ensemble of codes results in significantly fewer errors.
Bowls and Milk

3D reconstructions using the code ensemble
Errors due to inter-reflections
Errors due to inter-reflections
Depth-maps
Conventional Gray Codes
(11 images)
Phase Shifting
(18 images)
Our Code Ensemble
(41 images)
3D reconstructions using the code ensemble
Ikea Lamp

Depth-maps
Conventional Gray Codes
(11 images)
Our Code Ensemble
(41 images)
3D reconstruction using the code ensemble
The goal here is to reconstruct the shape of the shown Ikea lamp. The lamp is made of thin translucent paper. Consequently, light diffuses inside the lamp, bounces around and comes back out. Because of this, conventional Gray codes result in errors near the periphery of the lamp.
Paper Cups

Depth-maps
Conventional Gray Codes
(11 images)
Modulated Phase Shifting
(162 images)
Our Code Ensemble
(41 images)
Errors due to strong high-frequency inter-reflections
The paper cups have glazed white interiors, resulting in strong high-frequency inter-reflections. Consequently, conventional Gray codes result in significant errors. Because of high-frequency nature of inter-refletions, modulated phase-shifting also produces incorrect results. Depth map using our ensemble of codes has considerably fewer errors.
Flower Vase and Candles

Depth-maps
Conventional Gray Codes
(11 images)
Modulated Phase Shifting
(162 images)
Our Code Ensemble
(41 images)
Phase shifting
(18 images)