A video sequence of an underwater scene taken from
above the water surface suffers from severe distortions due
to water fluctuations. In this paper, we simultaneously estimate
the shape of the water surface and recover the planar
underwater scene without using any calibration patterns,
image priors, multiple viewpoints or active illumination.
The key idea is to build a compact spatial distortion
model of the water surface using the wave equation. Based
on this model, we present a novel tracking technique that is
designed specifically for water surfaces and addresses two
unique challenges—the absence of an object model or template
and the presence of complex appearance changes in
the scene due to water fluctuation. We show the effectiveness
of our approach on both simulated and real scenes,
with text and texture.
Yuandong Tian, Srinivasa G. Narasimhan