SAR image de-noising via grouping-based PCA and guided filter |
| |
作者姓名: | FANG Jing HU Shaohai MA Xiaole |
| |
作者单位: | Institute of Information Science;Shandong Province Key Laboratory of Medical Physics and Image Processing Technology |
| |
基金项目: | supported by the National Natural Science Foundation of China(62002208;61572063;61603225);the Natural Science Foundation of Shandong Province(ZR2016FQ04)。 |
| |
摘 要: | A novel synthetic aperture radar(SAR)image de-noising method based on the local pixel grouping(LPG)principal component analysis(PCA)and guided filter is proposed.This method contains two steps.In the first step,we process the noisy image by coarse filters,which can suppress the speckle effectively.The original SAR image is transformed into the additive noise model by logarithmic transform with deviation correction.Then,we use the pixel and its nearest neighbors as a vector to select training samples from the local window by LPG based on the block similar matching.The LPG method ensures that only the similar sample patches are used in the local statistical calculation of PCA transform estimation,so that the local features of the image can be well preserved after coefficients shrinkage in the PCA domain.In the second step,we do the guided filtering which can effectively eliminate small artifacts left over from the coarse filtering.Experimental results of simulated and real SAR images show that the proposed method outstrips the state-of-the-art image de-noising methods in the peak signalto-noise ratio(PSNR),the structural similarity(SSIM)index and the equivalent number of looks(ENLs),and is of perceived image quality.
|
关 键 词: | synthetic aperture radar(SAR)image de-noising local pixel grouping(LPG) principal component analysis(PCA) guided filter |
本文献已被 维普 等数据库收录! |