Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-12-10
1988-05-17
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
342185, 364731, 340720, H04N 701
Patent
active
047454750
ABSTRACT:
A system for converting A-scan signals in r, .theta. co-ordinates into display data for x, y co-ordinate display locations, in which, for each A-scan signal, signal values for which the r co-ordinate is greater than a predetermined value contribute to the display data and values for which the r co-ordinate is less do not, and the predetermined values of r are different for different A-scans. FIG. 2 shows pixels, or display locations, close to the origin of an x, y rastor display. The lines radiating from the origin show the r, .theta. co-ordinates of A-scan signals derived from a radar antenna, superposed for purposes of illustration on the grid of pixels. The display data used to brighten an individual pixel is taken only from some, and not from all, of the A-scans which intercept that pixel. In particular, no data is taken from the portions of the A-scans which lie radially inwardly of the points 28 to 36, but data is taken from the portions of the A-scans that lie radially outwardly.
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Groody James J.
Mars Incorporated
Peng John K.
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