In this section, the results from uncalibrated cameras are shown. Fig. 7 (a), (b) and (c) show the three sequential images of a head, which are observed from a translating camera. The apparent contours are extracted by fitting B-spline curves [3], and the Hough space is used for computing frontier points. The curved surface is reconstructed from the changes in apparent contours and the frontier points, and is shown in Fig. 7 (d). Fig. 7 (e) shows the projection of the reconstructed surface in the first image. Although the reconstructed surface (d) has 3D affine ambiguity, its projection in the image (e) has no ambiguity.
Figure 7: Results of the affine reconstruction.
(a), (b) and (c) show sequential images of a curved surface, i.e. head.
These images
are used for affine reconstruction of the curved surface.
The back of the head is recovered and is shown in (d).
Since we do not know the camera parameters, the recovered surface
is ambiguous up to a 3D affine. (e) shows the projection of
the recovered surface in the first image. Note there is no
ambiguity in the projected surface in (e).