| 杨文波,朱明,马天伟,陈东成,王德江.多线阵CCD亚像元成像超分辨率重构技术研究[J].光电子激光,2014,(6):1203~1212 |
| 多线阵CCD亚像元成像超分辨率重构技术研究 |
| Research on super resolution reconstruction of sub pixel imaging in multiple linear array CCDs |
| 投稿时间：2013-07-11 |
| DOI： |
| 中文关键词: 多线阵CCD 亚像元成像 超分辨率重构 空间分辨率 |
| 英文关键词:multiple line array CCDs sub-pixel imaging super-resolution reconstruction spatial resolution |
| 基金项目:国家自然科学基金(61203242,61308099)资助项目 (1.中国科学院长春光学精密机械与物理研究所,中国科学院航空光学成像与测量重点实验室,吉林 长春 130033； 2.中国科学院长春光学精密机械与物理研究所,吉林 长春 130033； 3.中国科学院大学,北京 100039) |
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| 中文摘要: |
| 为实现以多片 线阵CCD亚像元成像为基础,提出一种超分辨率重构算法。首先,在高分辨率网格上建立插 值模型；然 后,辨识插值重构图像在线阵列方向和扫描方向的模糊核,得到整幅图像的模糊核；最后, 采用带有 Neumman边界条件(BCs)的梯度平滑Richard-Lucy(GSRL)滤波复原算法去除模糊,抑制了振 铃效应。实验结果表明, 用本文算法重构超分辨率图像的灰度平均梯度(GMG)值较双线 性插值法提高了7.63,主观目视清晰、细节 丰富；可以实现对多片线阵CCD亚像元成像的超分辨率重构,获取更高的系统分辨率 。 |
| 英文摘要: |
| Without increasing the CCD pixels,the super-resolution reconstruct ion of sub-pixel imaging by increasing the temporal and spatial sampling frequencies in CCDs is o ne of the approaches to improve the system resolution.However,owing to the increase of sampling freque ncy,there exists aliasing in data collected by CCDs and blurring in a reconstructed high-resolut ion image,as a result of which the resolution is far away from the ideal value.To resolve the problem,a n algorithm of super-resolution reconstruction,based on sub-pixel imaging achieved by multip le linear array CCDs,is put forward.First of all,an interpolation model on high-resolution grid is es tablished.Next,blur kernels in an image with high-resolution are identified in linear array and scanning direc tion,respectively to obtain the blur kernel in a frame.Last,the gradient smooth Richard-Lucy algorithm wi th Neumman boundary conditions is employed to deblur the image and the ringing effects are inhibited as well.Experimental results prove that the gray mean grade (GMG) of super-resolution images reconstructed with the al gorithm compared with bilinear interpolation is improved by 7.63,which outperforms in both vis ual q uality and details. Super-resolution reconstruction of sub-pixel imaging in mu ltiple linear array CCDs can be achieved by this algorithm to obtain higher syst em resolution. |
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