In this section we show several cases which can not be done with other mosaicing methods. Forward camera motion used to be the classical case where traditional mosaicing fails. Manifold projection can easily handle forward motion, as shown in Fig. 4 .
Figure 4:
Mosaicing with a forward moving camera.
(a) First and (b) middle frames from a video sequence. Camera motion is
forward, and the focus of expansion is inside the image.
(c) The strip mosaic of the sequence. The curved boundary on the left
corresponds (top-to-bottom) to the left-bottom-right edges of the first
frame. Note that the road is always at full resolution.
(d) Viewing the mosaic left to right (of original sequence).
Note that the image is a link to an
MPEG movie
of the mosaicing process.
In Fig. 5 the camera is moving sideways, generating substantial parallax. Vertical strips were collected according to the affine transformation that was recovered along the sequence, and the strips were pasted in the panoramic image. Without view interpolation, duplications and truncations are seen clearly, while with view interpolation these effects are reduced. The view interpolation was performed by optical flow interpolation.
Figure 5:
Handling parallax: sideways motion
(a) Two original images.
(b) Mosaicing without view interpolation. Distant objects are
duplicated, and close objects are truncated.
(c) Using view interpolation reduces the distortions.
Adrian F Clark