计算机技术与发展
計算機技術與髮展
계산궤기술여발전
COMPUTER TECHNOLOGY AND DEVELOPMENT
2013年
1期
91-94
,共4页
赵伊宁%李跃华%李垣江%张光锋
趙伊寧%李躍華%李垣江%張光鋒
조이저%리약화%리원강%장광봉
Richardson-Lucy 算法%Contourlet 变换%频谱外推
Richardson-Lucy 算法%Contourlet 變換%頻譜外推
Richardson-Lucy 산법%Contourlet 변환%빈보외추
Richardson-Lucy algorithm%Contourlet transformation%spectral extrapolation
针对无源毫米波图像分辨率低的问题,文中提出一种将 Richardson-Lucy(RL)迭代算法与 Contourlet(CT)变换相结合的图像超分辨复原方法(Contourlet-RL,CT-RL).该方法利用 RL 算法实现图像频谱外推,并采用 Context 模型对多幅迭代子图进行 CT 域自适应去噪,最后利用各子图 CT 域部分高频信息进行逆 CT 变换以获得高分辨率图像.经实验结果证明,该方法能有效改善 RL 算法在频谱外推过程中对噪声敏感的缺陷,增强了图像的分辨率,有利于无源毫米波图像的超分辨率复原.
針對無源毫米波圖像分辨率低的問題,文中提齣一種將 Richardson-Lucy(RL)迭代算法與 Contourlet(CT)變換相結閤的圖像超分辨複原方法(Contourlet-RL,CT-RL).該方法利用 RL 算法實現圖像頻譜外推,併採用 Context 模型對多幅迭代子圖進行 CT 域自適應去譟,最後利用各子圖 CT 域部分高頻信息進行逆 CT 變換以穫得高分辨率圖像.經實驗結果證明,該方法能有效改善 RL 算法在頻譜外推過程中對譟聲敏感的缺陷,增彊瞭圖像的分辨率,有利于無源毫米波圖像的超分辨率複原.
침대무원호미파도상분변솔저적문제,문중제출일충장 Richardson-Lucy(RL)질대산법여 Contourlet(CT)변환상결합적도상초분변복원방법(Contourlet-RL,CT-RL).해방법이용 RL 산법실현도상빈보외추,병채용 Context 모형대다폭질대자도진행 CT 역자괄응거조,최후이용각자도 CT 역부분고빈신식진행역 CT 변환이획득고분변솔도상.경실험결과증명,해방법능유효개선 RL 산법재빈보외추과정중대조성민감적결함,증강료도상적분변솔,유리우무원호미파도상적초분변솔복원.
A new method named Contourlet-RL based on Richardson-Lucy algorithm and Contourlet transform is proposed for improving the poor resolution of passive millimeter wave (PMMW) images. The RL algorithm is used to spectral extrapolation,meanwhile the noise of sub images is removed self-adaptively at the regional level of CT domain according to the model of Context,and then the part infor-mation of high frequency is extracted and assembled in CT domain. At last,the inverse transformation is executed for obtaining the re-stored image. Experimental results demonstrate that the method compensates for the flaw of the RL algorithm's noise susceptibility and en-hances the resolution. Furthermore,it is propitious to the super-resolution restoration for PMMW images.