METHOD AND APPARATUS FOR PROCESSING AN IMAGE

摘要

PURPOSE: An image processing method and an apparatus thereof are provided to reduce coupling between a range direction variable and an azimuthal direction variable although the method is applied to a system requiring ultra wideband as a frequency band. CONSTITUTION: An image processing method includes the following steps of: generating dechirped data through the process of dechirping reflecting electromagnetic waves (S10); removing a phase component considering the distance between a target and an antenna from the dechirped data (S20); and processing a block signal about the data whose phase component is removed regarding a predetermined block area. The block signal process includes the following steps. The data is processed by Bulk RCMC (Range Cell Migration Correction) (S30). The data which is processed by the Bulk RCMC is converted from the distance-time domain to the distance-frequency domain (S40). The data in the distance-frequency domain is processed by azimuth deramping within a predetermined distance-frequency range (S50). CZT (Chirp ZTransform) is applied to the data processed by the azimuth deramping within a predetermined azimuth-frequency range (S60). [Reference numerals] (AA) Start; (BB) Start block process; (CC) Start AZIMUTH DERAMPING per each distance- frequency; (DD) Is it the end of distance-frequency ?; (EE,HH) No; (FF,JJ) Yes; (GG) Insert calculated result to each block; (II) Is this the end of block process?; (KK) End; (S10) Receive dechirped data; (S21) Distance direction FFT; (S22) Remove target phase distance; (S23) Distance direction IFFT; (S40) Determine distance direction FFT and the range of distance-frequency