二阶广义全变分耦合非局部变换域模型的图像放大  

Image enlargement basing on second order total generalized variation coupling to non-local transform domain model

作　　者：海涛 鲍宜帆 潘浩浩 Hai Tao;Bao Yifan;Pan Haohao(Mechanical and Electrical Engineering Institute,Nanyang Normal University,Nanyang 473061,China;Henan Engineering Research Center for Radio Frequency Front End and Antenna of Millimeter Wave Wireless Communication System,Nanyang 473061,China;Henan Intelligent Manufacturing Engineering Research Center for Vehicle Parts,Nanyang 473061,China;Electro Optic Institute,Nanjing University of Science&Technology,Nanjing 210094,China;Nanyang Vocational College of Agriculture,Nanyang 473061,China)

机构地区：[1]南阳师范学院机电工程学院,河南南阳473061 [2]河南省毫米波无线通信射频前端及天线工程研究中心,河南南阳473061 [3]河南省车辆零部件智能制造工程研究中心,河南南阳473061 [4]南京理工大学光电学院,江苏南京210094 [5]南阳农业职业学院,河南南阳473061

出　　处：《电子技术应用》2021年第11期90-94,104,共6页Application of Electronic Technique

基　　金：国家自然科学基金项目(61702289,61701262);教育部电子信息教指委项目(2020-YB-23);河南省教育厅教改项目(2019SJGLX379);河南省高校科技创新人才支持计划项目(21HASTIT032)。

摘　　要：为了提高偏微分方程放大算法对弱边缘和纹理细节的放大效果,采用二阶广义全变分耦合非局部变换域模型,提出了一种图像放大算法模型。非局部变换域模型通过对相似图像块构成的图像组进行三维变换,利用由于图像非局部自相似特性导致的变换系数稀疏特性建模,能够很好利用图像中相似图像块的非局部信息。该算法利用二阶广义全变分模型增强强边缘,非局部变换域模型增强弱边缘和纹理细节,通过变分模型实现两者的耦合,具有良好的放大效果。与其他算法进行仿真实验比较,二阶广义全变分耦合非局部变换域模型在处理强边缘、弱边缘和细节上都取得了较好的放大效果。In order to improve the zoomed effect of the weak edge and texture of image,the image enlargement model is proposed based on partial differential equation,combining total generalized variation and non-local transform domain model.Using the non-local self-similarity property of the image through the three dimension transform of the group composed of similar image block,the sparse representation model in transform domain utilizes non-local information of the image effectively.Total Generalized Variation enhancing strong edges better and non-local transform domain model enhancing the weak edge and texture details better,the proposed model has better performance.Compared with other algorithms,the second-order generalized total variation coupling to non-local transform domain model achieves better amplification effect in dealing with strong edges,weak edges and details.

关 键 词：广义全变分 非局部变换域模型 非局部自相似 图像放大 

分 类 号：TN911.73[电子电信—通信与信息系统]