Method study on three-dimensional image rebuilding based on ISAR sequences

Shape recognition with radar is of great importance to monitoring and colliding avoidance of space target. This paper introduces a three-dimensional image rebuilding method based on ISAR sequences, which could be used as a new way of shape recognition. The study applies optical flow field to extract three-dimensional structure of target scatters and mainly consists of four steps: obtaining ISAR image sequences of moving target; detecting, tracking and matching of target scatters; three-dimensional structure extracting of target scatters based on optical flow field analysis; target three-dimensional feature recognition. The three-dimensional structure is featured with stable and intuitive characteristic for the accumulation of time and space, which provides a new way to improve the reliability of shape recognition.