Descalloping of GF-3 ScanSAR image based on self-attention mechanism and CycleGAN
GF-3 satellite is the first C-band multi-polarimetric synthetic aperture radar satellite with a space resolution up to 1 m in China,in which scan synthetic aperture radar(ScanSAR)is one of the im-portant mode of GF-3.The working mechanism of this mode results in the phenomena of serious nonuni-formity,generally showing bright and dark stripes,also known as scalloping.In view of scalloping in ScanSAR mode of GF-3,this paper proposes a model combining self-attention mechanism and cycle-con-sistent adversarial networks(CycleGAN),so as to perform descalloping.The proposed descalloping method is compared with traditional descalloping methods and deep learning related algorithms,and ana-lyzed by indicators such as brightness average and average gradient.The experimental results demon-strate that the proposed method in this paper can better complete descalloping in the GF-3 ScanSAR im-age,effectively suppress the stripes phenomenon of the image,and improve the image quality,which is of great practical significance.