Uncalibrated X-ray stereo reconstruction
We describe a novel application of uncalibrated stereo reconstruction to Roentgen Stereophotogrammetry Analysis (RSA). In RSA, stereo X-ray images are taken of a bone containing a prosthesis (e.g. a replacement knee) and a number of metal markers. The aim is to recover the relative position of the p...
| Главные авторы: | , , |
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| Формат: | Conference item |
| Язык: | English |
| Опубликовано: |
BMVA Press
1995
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| Итог: | We describe a novel application of uncalibrated stereo reconstruction
to Roentgen Stereophotogrammetry Analysis (RSA). In RSA, stereo
X-ray images are taken of a bone containing a prosthesis (e.g. a replacement knee) and a number of metal markers. The aim is to recover
the relative position of the prosthesis and markers in 3D.
Accuracy in previous RSA methods has been limited by two factors:
manual feature selection and an assumption that camera calibration
parameters are known to high precision - this is not the case in practice.
Furthermore, the manual processing is slow and tedious.
We report progress towards developing a fully automatic RSA system. New algorithms are described for automatically localising marker
points in X-ray images to sub-pixel accuracy, and using them to reconstruct accurate 3D positions using robust statistical methods. Preliminary experiments give excellent results. |
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