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1992-04-14
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These images were created using a 3-D LASAR camera. (LASAR is a Perceptron
trade mark that stands for laser radar.) The camera scans the scene with an
laser beam and directly measures the distance to each pixel. For you engineers,
it does it by amplitude modulating the laser beam with a high frequency sine
wave. The phase difference between the output and the returning signal is
measured to determine the distance. For more information, contact:
Perceptron, Inc.
23855 Research Drive
Farmington Hills, MI 48335
(313)478-7710, FAX 478-7059
The scanner produces two images, the distance, or range image, and the
intensity image. Each is twelve bits per pixel, so the values are 0..4095.
However, in order to make it easier to see the images, the contrast has been
enhanced by reducing the depth of field. The most interesting range slice is
converted to eight bit pixels, with gray levels 0..255. This affects the
scale factor for the range data. Each image has a different scale factor.
Each file name ends in either "I" for the intensity image, or "R" for the
range image. The one exception is BIN_FILT, which is a median filtered range
image.
BIN: This is a bin full of manifold castings. A robot picks the castings
from the bin.
FLOWERS: This is a deliberately confusing image, showing flowers in front
of pictures of flowers. The camaflage works in the intensity image,
but not in the range image.
HUMAN: This is a scan of a human body.
DOOR: This is part of a plastic automobile door panel.
ROOM: This is a very large field of view, low resolution image.
POTHOLE: A problem in the parking lot.