基于CUDA的各向异性热传导模型的图像修复  

Image inpainting using anisotropic heat transfer model based on CUDA

作　　者：周冰园[1] 陈庆奎[1,2] 

机构地区：[1]上海理工大学光电信息与计算机学院,上海200093 [2]上海理工大学上海现代光学系统重点实验室,上海200093

出　　处：《计算机应用研究》2014年第6期1901-1905,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(60970012);国家教育部博士学科点专项科研博导基金资助项目(20113120110008);上海市教委创新基金重点资助项目(13ZZ112);上海信息技术领域重点科技攻关计划基金资助项目(09511501000;09220502800);上海市教育科学研究项目(B11042);上海市一流学科资助项目(XTKX2012);山东省自然科学基金资助项目(ZR2013FL005)

摘　　要：针对文物数字图像修复处理中纹理信息缺失和计算复杂度高的问题,提出基于图像结构和不规则纹理的GPU并行修复算法。在现存研究基础上修改了热传导偏微分方程模型,在该模型设计中突出考虑图像结构和不规则纹理信息对热传导的影响,通过增加重要图像恢复信息的方式提高了修复效果;然而大量不规则纹理信息的处理降低了图像修复的效率,因此为保证算法的实时修复效果,通过GPU并行化修复过程中的雅可比迭代过程来提高数据密集计算的效率,保证图像修复的性能。实验证明,该图像修复模型进一步提高了修复效果并且增加了应用的普适性;同时与串行算法相比,计算速度提高了20倍以上。该并行图像修复方法具有较好的应用价值。This paper proposed the GPU parallel repair algorithm based on irregular image structure and texture for lack of texture information in digital image restoration processing of cultural relics and the problem of high computational complexity.On the basis of existing research,it modified the heat transfer partial differential equation model and highlighted considering irregular image structure and texture information to the influence of heat transfer in the model design,by increasing the important image recovery information to improve the effect of the repairment.However,a large number of irregular texture information processing reduced the efficiency of image inpainting.So in order to ensure real-time repair effect of the algorithm,through the restore process of GPU parallel Jacobi iteration process to improve the efficiency of the data intensive computing which ensured that the performance of image inpainting.Finally experiments show that the image inpainting model improves the effect of repairment and adds the universality of the application.Compared with serial algorithm at the same time,the calculation speed increases by more than 20 times.The parallel image inpainting method has good application value.

关 键 词：同一设备计算架构 图像修复 结构 纹理 热传导模型 雅克比迭代法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]