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Fig. 5.14 Reconstruction results for synthetic data. ( a ) Surface reconstruction by a combined anal-
ysis of one shading and one shadow image according to Sect. 5.2.1 , with uniform surface albedo.
( b ) Surface reconstruction by photometric stereo (two shading images) according to Sect. 3.3.1 and
one shadow image, with uniform surface albedo. ( c )Sameas( b ), but with non-uniform surface
albedo. ( d ) Surface reconstruction by shadow-based initialisation of the surface profile according
to Sect. 5.2.3 , with uniform ( middle ) and non-uniform ( right ) surface albedo. The label of the z
axis of the left plot is valid for all three plots. For detailed comments, cf. Sect. 5.2.4 and Table 5.2
5.2.5 Discussion
In this section we have described a self-consistent scheme for the integration of
shading and shadow features based on at least two pixel-synchronous images of
the same surface part under different illumination conditions. For a small number
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