Method for smoothing an image generated by coordinate conversion

Details Method for smoothing an image generated by coordinate conversion Method for smoothing an image generated by coordinate conversion

1987-01-09

1988-09-27

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Display

358140, 364731, H04N 701

Patent

active

047745169

ABSTRACT:
The invention concerns a method for smoothing, through filling, an image generated by the conversion of polar coordinates into Cartesian coordinates. A filling of these pixels not involved in the conversion is performed at the level of the signal received in polar coordinates. Artificial radials are created between the effective radials supplied in polar coordinates and the artificial radials have attributed a non-zero video signal, as a function of the video signals of the adjacent effective radials. These artificial radials are thereafter converted into Cartesian coordinates and fill the pixels otherwise not involved. The invention has application to the digital scan converted for radar display.

REFERENCES:
patent: 4310853 (1982-01-01), Madson
patent: 4547803 (1985-10-01), Richards
patent: 4697185 (1987-09-01), Thomas et al.
Walker, J. T., "Digital Scan Conversion and Smoothing for a Real Time Linear Array Imaging System," ACOUSTICAL IMAGING, vol. 8, pp. 1-14.

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