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(a) (Zelnik-Manor et al., 2005) (b) (Carroll et al., 2009) (c) Ours, s = 0.8
Figure 4: Comparison with other methods to project the viewing sphere to the image plane for a field of view of 150 degrees.
In the result obtained by the method in (Zelnik-Manor et al., 2005) (a), the different perspective projections used for different
areas of the image appear clear and unpleasant on the floor of the scene. The method by (Carroll et al., 2009) (b) preserves
all straight lines marked by the user, but fails to preserve the ones on the floor (which are too many to be marked by the user).
Our result (c) has all straight lines in the scene with very little bending.
Figure 5: Top-left: input equi-rectangular image. Top-
right: result of applying a scale s = 0.05 on the viewing
sphere. Bottom: result of perspective projection applied to
the transformed viewing sphere (showing only the area in-
side the red rectangle of the top-right figure). Although al-
most the entire viewing sphere is being shown, unpleasant
straight line distortions appear.
for making available their images under the Creative
Commons license: Janne., gadl and HamburgerJung.
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