Patent attributes
A synthetic aperture radar signal processing device according to the present invention includes, a low-accuracy interpolation processing unit to perform interpolation processing on discrete data obtained from signals received by a synthetic aperture radar, a high-accuracy interpolation processing unit to perform interpolation processing on the discrete data with higher accuracy than the low-accuracy interpolation processing unit, a curvature determination unit to select either the high-accuracy interpolation processing unit or the low-accuracy interpolation processing unit in accordance with a first curvature that is a curvature of the discrete data at a target area for the interpolation processing, and an image reproduction processing unit to reproduce an image by use of a result of the interpolation processing selected by the curvature determination unit, wherein the curvature determination unit selects a point A, a point B, and a point C of discrete data adjacently arranged in a predetermined direction near the target area, and determines the first curvature based on a distance Δf1R between a point externally dividing a line segment connecting the point A and the point B at (AB+BC):BC and the point C (where AB is a distance between the point A and the point B, and BC is a distance between the point B and the point C). Therefore, the amount of computation in calculating curvature from discrete data can be suppressed.
