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The reflective object calibration process, shown for a planar screen on the left and a corner screen on the right. Top: A reflective calibration object is placed in the same location as the object. Pixels are projected onto the screen and segmented from the images. Bottom: The reflected rays are used to index into the environment map, pro- ducing an image which is correct from the point-of-view of the object. 

The reflective object calibration process, shown for a planar screen on the left and a corner screen on the right. Top: A reflective calibration object is placed in the same location as the object. Pixels are projected onto the screen and segmented from the images. Bottom: The reflected rays are used to index into the environment map, pro- ducing an image which is correct from the point-of-view of the object. 

Source publication
Figure 1. Left: pitcher model in St. 
Figure 2. Sample light probes. Left and mid- dle: Real light probes...
Figure 4. A picture of the Surface Light Field capture system. The...
Figure 5. Mapping the virtual illumination environment to our physical...
+4 Figure 6. The reflective object calibration process, shown for a planar...
Capturing a Surface Light Field Under Virtual Illumination
Article
Full-text available
  • Jan 2008
Surface light fields can be used to render the complex re- flectance properties of a physical object. One limitation is that they can only represent the fixed lighting conditions of the environment where the model was captured. If a specific lighting condition is desired, then there are two options: ei- ther use a combination of physical lights as...
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Context 1
... the known projector pixel and the reflec- tion of this point into the camera, the ray associated with each projector pixel can be computed. This is shown in Fig- ure 6. ...

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Citations

... In this paper we introduce a simple procedure to calibrate a surface light field capture system. This system was developed to capture the illumination from a virtual environment map [2]. However, the system has the drawback of a complex calibration procedure that is limited to planar screens. ...
... This is problematic for synthetic environments such as games or virtual environments. Our solution is to illuminate the real object with a high dynamic range environment map using a projector-camera system [2]. The system consists of a projector that casts synthetic illumination from a light probe onto a screen. ...
... However, the proposed system [2] has the drawback of a complex calibration procedure which is limited to planar screens. The components that have to be calibrated are the position and the geometry of the screen in the coordinate system of the tracking board. ...
Calibration of a Surface Light Field Capture System
Article
Full-text available
  • Dec 2008
In this paper we introduce a simple procedure to cali-brate a surface light field capture system. This system was developed to capture the illumination from a virtual envi-ronment map [2]. However, the system has the drawback of a complex calibration procedure that is limited to planar screens. We propose a simple calibration procedure using a reflective calibration object that is able to deal with arbi-trary screen geometries. Our calibration procedure is not limited to our application and can be used to calibrate most camera projector systems.
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