IMAGE DECODING APPARATUS BASED ON SQUINT SAR AND METHOD OF DECODING IMAGE USING THE SAME

摘要

A directional angle SAR-based image restoration apparatus includes a waveform generator, a divider, an antenna member, a mixer, a raw data generator, a first Fourier transform unit, a raw data preprocessor, a second Fourier transform unit, a trajectory characteristic function generator, a Fourier inverse transform unit, It includes a data reverse rotation unit, and an image restoration unit. The raw data preprocessor is connected to the first Fourier transform unit, and generates first corrected raw data by rotating the first Fourier transformed raw data by the orientation angle. The trajectory characteristic function generating unit is connected to the second Fourier transform unit, compensates for displacement according to the movement of the aircraft in a state rotated by the orientation angle, and additionally compensates for a distance difference caused by the rotation to obtain a third Create calibration raw data. The data inverse rotator is connected to the inverse Fourier transform unit, and generates reconstructed image data by inversely rotating the fourth correction data by the orientation angle. The image restoration unit restores the image on the composite aperture by projecting the restored image data for each pixel.