Projector%20with%20Radiometric%20Screen%20Compensation

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Projector with Radiometric Screen Compensation

• Shree K. Nayar, Harish Peri
• Michael Grossberg, Peter Belhumeur

Computer Science Columbia University Procams
Workshop ICCV 2003, Nice, France
Support National Science Foundation
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Projecting on Any Surface ?
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Projector-Camera System
Textured Screen
Camera
Computer
Projector
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Geometric Calibration
Projector Input
Camera Output
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Projector-Camera Pipeline Radiometry
Screen
I
D
P
Display Device
Projector
E
What Display Image (I) will produce a Desired
Captured Image (M) ?
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Radiometric Model (for each pixel)
I
D
Screen
P
Display Device
Projector
E
M
B
C
L
Capture Device
Camera
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Finding the Model Parameters (at each pixel)
I
D
Screen
P
Display Device
Projector
E
M
B
C
L
Capture Device
Camera
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Finding the Color Mixing Matrix
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Color Mixing V Matrices
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Radiometric Calibration Color
Projector Input
Camera Output
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Color Experiment
Texture of Screen
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Face Image on Checkerboard Screen
Original (desired) image (I)
Uncompensated output (M)
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Face Video on Brick Texture
Normal Projector
Projector With Compensation
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Scene Video on Brick Texture
Normal Projector
Projector With Compensation
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Face Video on Butterfly Poster
Normal Projector
Projector With Compensation
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Summary

• Radiometric Model for Projector-Camera System

• Off-Line Method for Radiometric Calibration

• On-Line Algorithm for Screen Compensation

• Refinement using Continuous Feedback