| 一种适合数字相机实时处理的插值算法 |
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| 引用本文： | 马华平,唐遵烈,刘爽,曾璞,陈伟,魏广路,李明,王颖.一种适合数字相机实时处理的插值算法[J].半导体光电,2013,34(1):151-153,157. |
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| 作者姓名： | 马华平 唐遵烈 刘爽 曾璞 陈伟 魏广路 李明 王颖 |
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| 作者单位： | 1. 电子科技大学光电信息学院,成都,510054
2. 重庆光电技术研究所,重庆,400060 |
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| 摘 要： | 为保证图像还原质量的情况下实现数字相机实时处理的功能,提出了一种基于梯度的单通道独立插值算法.通过引入绿色分量的水平、垂直梯度及梯度差值的阈值不仅可以使图像的边界信息得到更好的保存,也可以使平滑区域的色彩更加平滑.同时引入红色、蓝色分量的斜45°、斜135°方向的梯度作为边界判定的补充,保证三种颜色通道的边界都能得到有效判断,使整个图像边界变得更清晰.为验证算法的插值效果,采用Matlab进行仿真测试.仿真表明:该插值算法在平滑区和边界都能得到较理想的效果,相对最近邻插值和双线性插值边界,拉链现象明显降低.理论分析表明:该算法避免了复杂的乘除运算,易于硬件实现,且适宜于并行处理.
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| 关 键 词： | 插值算法 数字相机 拜耳颜色滤波阵列 |
| 收稿时间： | 6/5/2012 12:00:00 AM |
An Interpolation Algorithm for Real Time Processing of Digital Cameras |
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| MA Huaping,TANG ZunLie,LIU Shuang,ZENG Pu,CHEN Wei,WEI Guanglu,LI Ming and WANG Ying.An Interpolation Algorithm for Real Time Processing of Digital Cameras[J].Semiconductor Optoelectronics,2013,34(1):151-153,157. |
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| Authors: | MA Huaping TANG ZunLie LIU Shuang ZENG Pu CHEN Wei WEI Guanglu LI Ming and WANG Ying |
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| Institution: | 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;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;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;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;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;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;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;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 |
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| Abstract: | 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 45o and 135o 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 experiment 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. Besides, the interpolation algorithm is designed for the real time processing under the precondition of ensuring the image reconstruction quality. Theoretical analysis indicates that the proposed algorithm is easy to realize for hardware wiithout complicated multiplication and division operation, and the procedure of the interpolation is suitable for parallel processing. |
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| Keywords: | interpolation algorithm digital camera Bayer color filter array |
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