Reconstructing a shower curtain
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Reconstructed Shapes
Conventional Gray codes
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Phase shifting
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XOR-04 codes
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Light diffuses through the curtain and is reflected from
the background, creating long-range optical interactions.
Consequently, conventional Gray codes and phase shifting
result in large errors and holes in the estimated shape.
The correct shape of the curtain is nearly planar, with
small ripples. Reconstruction using our logical XOR-04
codes is nearly error free, with the same number of input
images as the conventional Gray codes.
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Reconstructing translucent objects
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Translucent materials are often characterized by low direct
component. Since modulated phase shifting relies on explicitly
separating the direct and the global components, it suffers
from low signal-to-noise-ratio for highly translucent materials.
On the other hand, our method does not rely on explicit
direct-global separation, resulting in better quality reconstructions.
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3D Scanning in the presence of Projector Defocus
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A scene consisting of industrial parts is shown. Due to
projector defocus, the high frequency patterns in the
conventional Gray codes can not be decoded, resulting
in a loss of depth resolution. Notice the quantization
artifacts. These artifacts can also result from other
optical imperfections common in low-cost projectors such
as pico-projectors. Depth map computed using Gray codes
with large minimum stripe-width (min-SW) does not suffer
from loss of depth resolution.
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