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《Semiconductor Optoelectronics》 2013-01
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An Interpolation Algorithm for Real Time Processing of Digital Cameras

MA Huaping1,TANG ZunLie2,LIU Shuang1,ZENG Pu1,CHEN Wei1, WEI Guanglu1,LI Ming2,WANG Ying2((1.College of Electro-optic Information,University of Electronic Science and Technology of China,Chengdu 510054,CHN; 2.Chongqing Optoelectronics Research Institute,Chongqing 400060,CHN)  
In order to ensure the reconstruction quality of an image and realize the function of real time processing,a single channel interpolation algorithm based on gradient is proposed.By introducing horizontal and vertical gradient of the Green channel,the edge information can be preserved better,and the color of the smooth area becomes more smooth simultaneously.And by simultaneously introducing the 45° and 135° gradients of the Blue and Red channels as the additional edge judgement,the edge information of all the three channels can get a sufficient judgement,so the edge of the whole image become more clearer.Then,the quality of the interpolation algorithm will be evaluated and verified by the Matlab simulation.The experimental results show that,compared with Nearest Neighbor Replication and Bilinear interpolation,a better quality can be got not only on edge but in the smooth area,and the zipper effect is reduced apparently.Theoretical analysis indicates that the proposed algorithm is easy to realize for hardware without complicated multiplication and division operation,and the procedure of the interpolation is suitable for parallel processing.
【CateGory Index】: TP391.41
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