Space target three-dimensional structure reconstruction method using ISAR image sequence chain type scoring

• Main Authors: ZHANG SHENTAO, ZHAO XIAOTONG, XU DAN, WANG XUAN, ZHANG SHUAIQIN, ZHANG RONGJIE, XING MENGDAO, WAN XIN, GAO LAN, WANG SONG
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

A space target three-dimensional structure reconstruction method using ISAR image sequence chain type scoring comprises the following steps: dividing echoes acquired by a radar into a plurality of sub-apertures, then performing RD imaging on each sub-aperture to obtain a group of ISAR image sequences, selecting images of which the imaging effect and the structural integrity meet requirements, extracting strong scattering points in each image, and obtaining a group of ISAR image sequences; the method comprises the following steps: firstly, obtaining two-dimensional ISAR images, then calculating to obtain a projection matrix from a three-dimensional target to each two-dimensional ISAR image, then sequentially carrying out distance and azimuth two-dimensional alignment on each image, completing scattering point matching through a chain type scoring matching method to obtain a score set and a matching combination set, and finally obtaining a three-dimensional reconstruction point coordinate set through target thr