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Groupwise Geometric and Photometric Direct Image Registration (2006)
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| Venue: | Proc. British Machine Vision Conf |
| Citations: | 32 - 1 self |
BibTeX
@INPROCEEDINGS{Bartoli06groupwisegeometric,
author = {Adrien Bartoli},
title = {Groupwise Geometric and Photometric Direct Image Registration},
booktitle = {Proc. British Machine Vision Conf},
year = {2006}
}
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Abstract
Abstract—Image registration consists of estimating geometric and photometric transformations that align two images as best possible. The direct approach consists of minimizing the discrepancy in the intensity or color of the pixels. The inverse compositional algorithm has been recently proposed by Baker et al. for the direct estimation of groupwise geometric transformations. It is efficient in that it performs several computationally expensive calculations at a precomputation phase. Photometric transformations act on the value of the pixels. They account for effects such as lighting change. Jointly estimating geometric and photometric transformations is thus important for many tasks. such as image mosaicing. We propose an algorithm to jointly estimate groupwise geometric and photometric transformations while preserving the efficient precomputation-based design of the original inverse compositional algorithm. It is called the dual inverse compositional algorithm. It uses different approximations than the simultaneous inverse compositional algorithm and handles groupwise geometric and global photometric transformations. Its name stems from the fact that it uses an inverse compositional update rule for both the geometric and the photometric transformations. We demonstrate the proposed algorithm and compare it to previous ones on simulated and real data. This shows clear improvements in computational efficiency and in terms of convergence. Index Terms—Image registration, geometric warp, photometric transformation, inverse composition. Ç 1
Keyphrases
photometric transformation groupwise geometric photometric direct image registration different approximation inverse compositional update rule groupwise geometric transformation real data inverse composition direct estimation dual inverse compositional algorithm global photometric transformation photometric transformation act original inverse compositional algorithm computational efficiency abstract image registration efficient precomputation-based design precomputation phase index term image registration simultaneous inverse compositional algorithm image mosaicing many task direct approach expensive calculation previous one inverse compositional algorithm clear improvement geometric warp
