基于DaVinci技术数字对焦重构算法研究与实现  

Implementation of digital refocusing reconstruction algorithm based on DaVinci technology

作　　者：彭丁国 袁艳[1] 周志良[2] 杨旺林 

机构地区：[1]北京航空航天大学精密光机电一体化技术教育部重点实验室,北京100191 [2]中国科学技术大学,安徽合肥230026

出　　处：《现代电子技术》2012年第4期91-94,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(60972088);长江学者和创新团队发展计划资助(IRT0705)

摘　　要：数字对焦光场成像技术是一种新型的计算成像技术,利用光学手段获取四维光场信息,通过重构二维空间信息和一维深度信息,达到先拍摄后对焦的目的。研究光场图像数字对焦重构算法,利用TI公司推出的DaVinci系列处理器DM6467对数字对焦重构算法进行硬件仿真,通过改变对焦系数,得到不同深度的对焦图像。同时,根据C64x+DSP核的特点,通过循环分解、项目级优化等方法对代码进行一定的优化,使代码执行效率提高了18倍左右,对实现光场成像系统的小型化和实时化具有重要的指导意义。The digital refocusing light-field photography is a new kind of computational photography,which capturs four-dimensional light-field information by optical methods and reconstructs two-dimensional spatial information and one-dimensional depth information in object space to photograph focused at different depths.Based on the research of digital refocusing reconstruction algorithms,the hardware implementation of digital refocusing algorithms for reconstruction of light-field images is presented.The DM6467 processor,one of TI's DaVinci series,is utilized as the processing platform.Images at different depths are reconstructed by changing refocusing coefficient.Moreover,code optimization methods such as cyclic decomposition,project-level optimization and so on are proposed according to the C64x+dsp core,which improves the code excutive efficiency by a factor of 18.It has a instructive significance for realizing a portable and real-time light-field imaging system in the future.

关 键 词：数字对焦 图像重构 DM6467 算法优化 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]