US 11,754,704 B2
Synthetic-aperture-radar image processing device and image processing method
Daisuke Ikefuji, Tokyo (JP); Taichi Tanaka, Tokyo (JP); and Osamu Hoshuyama, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/441,866
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Mar. 29, 2019, PCT No. PCT/JP2019/014021
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/202259, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0179065 A1, Jun. 9, 2022
Int. Cl. G01S 13/90 (2006.01)
CPC G01S 13/9023 (2013.01) [G01S 13/9004 (2019.05)] 15 Claims
OG exemplary drawing
 
1. A synthetic aperture radar image processing device comprising:
a time-series analysis unit which extracts persistent scatterers from time-series observation data for the observation direction for an observation area observed from multiple observation directions by a radar, and calculating displacement speeds of the extracted persistent scatterers,
a clustering unit which generates reflection point clusters by clustering extracted persistent scatterers based on their phase and position,
a distance calculation unit which calculates a distance between each of the persistent scatterers included in the reflection point clusters and each structure included in the observation area,
a representative value calculation unit which calculates each representative value for the distance between each persistent scatterer and each structure, for each reflection point cluster, and
a corresponding structure determination unit which associates the structure corresponding to the smallest representative value with the persistent scatterer, for each reflection point cluster.