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303 results about "Non coplanar" patented technology

Non Coplanar Definition. Introduction to non-coplanar points: The points which do not lie in the same plane or geometrical plane are called as non-coplanar points....

Method for estimating target rotation of inverse synthetic aperture radar based on time-space image sequence

The invention discloses a method for estimating target rotation of an inverse synthetic aperture radar (ISAR) based on time-space image sequence, which comprises the following steps: acquiring a time-dimensional RD image sequence of the ISAR according to the received echo data; and analyzing and estimating the rotation of a target by tracking attitude change between images caused by the rotation of the target; judging whether the rotation planes of the target in any two RD images are coplanar according to a time-space two-dimensional image sequence acquired by a single receiver or a plurality of receivers; when the rotation planes are coplanar, further improving the estimation precision of a rotation parameter through a dominant point method or a rotation related method; moreover, realizing large-angle high-resolution imaging by PFA or CBP algorithm; and when the rotation planes are non-coplanar, estimating the azimuth and pitching rotation information of the target so as to realize three-dimensional imaging of the target. The method ensures the target rotation estimation precision and stability, and meanwhile can improve the performance of the ISAR imaging in the three aspects of transverse calibration, large-angle high-resolution imaging and three-dimensional imaging. Moreover, compared with the conventional target rotation estimation method, the method has high precision, and is easy in engineering realization.
Owner:TSINGHUA UNIV
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