Gq. Wei et al., INTENSITY-BASED AND GRADIENT-BASED STEREO MATCHING USING HIERARCHICALGAUSSIAN-BASIS FUNCTIONS, IEEE transactions on pattern analysis and machine intelligence, 20(11), 1998, pp. 1143-1160
In this paper, we propose a stereo correspondence method by minimizing
intensity and gradient errors simultaneously. In contrast to conventi
onal use of image gradients, the gradients are applied in the deformed
image space. Although a uniform smoothness constraint is imposed, it
is applied only to nonfeature regions. To avoid local minima in the fu
nction minimization, we propose to parameterize the disparity function
by hierarchical Gaussians. Both the uniqueness and the ordering const
raints can be easily imposed in our minimization framework. Besides, w
e propose a method to estimate the disparity map and the camera respon
se difference parameters simultaneously. Experiments with various real
stereo images show robust performances of our algorithm.