A method for rapid limited-angle tomography is suggested that
allows the reconstruction of density distribution in hardwood samples
with high accuracy and spatial resolution from only a few x-ray
projections. The sparsity of the experimental x-ray data is
compensated by incorporation of a priori knowledge about
generic wood macrostructure, as well as some morphological information
obtainable from optical images of the sample surface, in the
mathematical framework of the tomographic analysis. Numerical tests
of the proposed method confirm its potential as a practical technique
for nondestructive testing of trees for scientific and industrial
purposes. It can also be useful for the analysis of other types of
object with an underlying layered structure.
© 1998 Optical Society of America
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