Global Illumination Cancellation for Complex Projection Environments

In this video we present dynamic projection results within a spatially
augmented reality system for two of the examples in our paper.  All
video sequences are presented at 2x speed.  

The original frame rates are included below.  Note that these frame
rates are for the entire multi-projector system and include desired
appearance calculation and unoptimized asynchronous file transfer.
The frame rate numbers in the paper are for the global illumination
cancellation computation alone.

Note that we calculate the optimal projection imagery for each frame
independently.  There is no attempt to preserve temporal coherence in
the animation.

Please refer to Figure 4 in the paper for the desired imagery.

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Figure 4, first example, C-shaped, ~1300 triangles
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Uncompensated:   1.6 fps
The scene is generally washed out, and the colors appear uniform, yet
pastel.

Sheng et al. 2010:  1.2 fps
The apparent color of the left flat wall changes from red to orange to
yellow, which does not match the desired uniform orange appearance.
Similarly, the apparent color of the right flat wall is somewhat
magenta rather than red.  Finally, the perception of the color of the
floor (desired color: medium grey) is somewhat darker than intended.

Our method:  0.8 fps
The left flat wall is consistently yellow throughout the animation
(the brightness does vary throughout the sequence as intended).  The
floor color more accurately matches the desired appearance.

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Figure 4, second example, blue curves, 1000 triangles
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Uncompensated:   2.0 fps
The scene is generally washed out, and most surfaces appear light blue
in color.

Sheng et al. 2010:  1.4 fps
The long wavy wall has a uniformly blue appearance throughout the
animation, matching the desired appearance.  However, the relative
difference between the wavy wall and the floor, and the wavy wall and
the white wall on the right is not as significant as it is in the
desired appearance.

Our method:  1.0 fps
The relative difference in perception of color between the wavy blue
wall and the white wall on the right is enhanced and more accurately
matches the desired appearance.  And similarly, the perception of the
floor color (desired: medium grey) and the undulated wall is more
accurate.