
4.2 Image processing
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convolvers are required. Furthermore, the basic scan line
sampling scheme can be extended to process gray level images
as well. As shown in figure 4-5, any front end which yields one
data point per scan line can be used. Here we average the video
signal over a small interval (white boxes) and then send it to an
ordinary A-to-D converter. Examining a single horizontal slice
across the image gives information which can be used for
motion or stereo vision [Brooks, Flynn, and Marill 87]. A
coarse two dimensional image can be used to determine the
orientation of ceiling lights as a navigational reference, or to
follow object ...