Masahiko Shizawa
Direct Estimation of Multiple Disparities for
Transparent Multiple Surfaces in Binocular Stereo
Abstract:A closed-form single-shot stereo disparity estimation algorithm is proposed that can compute
multiple disparities due to transparency directly from signal differences and variations
on epipolar lines of a binocular image pair. The transparent stereo constraint
equations have been derived by using a novel mathematical technique, the principle of
superposition. A computationally tractable single-shot algorithm is derived by using the
first-order approximation of the constraint equations with respect to disparities. The
algorithm can compute multiple dispatities from only two images in contrast to the previous
results for motion transparency that needed at least n+1 frames for n simultaneous motion estimates. The derived algorithm can be viewed as the SSD(sum of squared differences)
for signal matching extended to deal with multiple disparities. However, the
constraint is not dedicated solely to SSD method and several other implementations are
possible. These possibilities are also discussed in this paper.