| 摘要 |
A method of radar imaging moving objects, especially ground traffic at airports, uses inverse synthetic aperture radar (ISAR). The two-dimensional location distribution of backscatter centers of the object is detected. A plurality of range bins are provided for suppressing of interference, created because of Doppler shifts, in microwave images represented in the form of pixels. Only those pixels are considered to be active which exceed a defined intensity threshold value, which had previously been determined as a fixed fraction of the maximally present pixel intensity. A range area with interference is determined with the aid of a method wherein the threshold is exceeded and wherein the number of active pixels in the individual successive range bins is counted, and wherein image opening is performed in the detected interfered range area, which consists of a succession of a single or several repeated "erosions" and "dilatations". An erosion cancels all those active pixels, in whose defined vicinity an inactive pixel occurs, and a dilatation activates all pixels in the defined vicinity of an active pixel.
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