An extremely wide-angle distortion-free shot is produced,
giving rise to a dramatic sense of extreme perspective.
You can obtain a very large version that I made with
a better camera (color). It is 4320 pixels across and 1505 high,
suitable for printing on a DesignJet 650C printer.
In this example, I stood at a fixed location and swung my head
(fitted with my wearable wireless webcam)
around to capture a sequence of images.
The imaging situation violates the assumptions (static scene
and fixed COP) in the following ways:
- It was a busy afternoon at MIT, and being the main entrance,
there were many people walking in and out of the
- The video was "noisy" due to the use of a cheap surplus (slightly
defective) black and white video camera
with a really bad moulded plastic lens. This is the kind of
video camera that has no focus adjustment (fixed focus),
no iris adjustment, in fact, no adjustments of any kind.
- The camera had automatic gain control which could not be disabled.
Thus frames with more sky area in them were imaged darker.
- The video was transmitted over a noisy radio communications
Despite these violations of the assumptions, the result is still
In the above example, the spatial extent of the
image is increased by sweeping the camera left to right
(this was a wearable camera, and the left-right motion was due to
the rotation of my neck).
Original image data available on request (please specify color or greyscale
image sequence). Perhaps you might provide some feedback on how you'd
like to see the data distributed (e.g. as a UNIX tarfile, or perhaps simply
as a sequence of separate image files).
Imaging using video display and camera allows the visual experience
to be `mediated', that is, images are transmitted to a remote
processor, altered, and then sent back to my display.
Video Orbits of the Projective Group:
A New Perspective on Image Mosaicing.