High-resolution imaging by Bi-linear CCD shifting sampling

	High-resolution imaging by Bi-linear CCD shifting sampling
	Xu, S.; C. Chen; B. Sun; X. Zhang and J. Ren
	2015
发表期刊	Zhongguo Jiguang/Chinese Journal of Lasers
卷号	42 期号:9
摘要	The resolution of remote sensing camera is restricted by the charge coupled device (CCD) pixel size. To solve the problem, imaging capability of optical system in frequency bandwidth exceeding Nyquist frequency is used to develop a camera which consists of two linear CCDs. These two CCDs are stitched together with a halfpixel width displacement in both directions along and perpendicular to the CCD axis. The principle of improving the resolution of the proposed system is presented. In hipermode, one way interpolation algorithm based on integrated gradients to determine the direction of interpolation is proposed to avoid zipper effect caused by average method. In supermode, high resolution image is acquired in real time by using random access memory (RAM) blocks inside field programmable gate array (FPGA) to regroup image stagger. Gray mean gradients (GMG) of the two high resolution images are increased by factors of 62.5% and 78.3% respectively after using Wiener filter. Results show that the proposed algorithm can make image edge clear and intact. The effect of the algorithm is better than average method and the hardware implementation is easy. The resolution is 1.16 and 1.6 times greater than that of conventional system. Two imaging method can also reduce the image frequency aliasing. Sampling phase staggered technology can take advantage of imaging capability of optical system in high-frequency bandwidth and perform high-resolution imaging. , 2015, Science Press. All right reserved.
文章类型	期刊论文
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/56389
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xu, S.,C. Chen,B. Sun,et al. High-resolution imaging by Bi-linear CCD shifting sampling[J]. Zhongguo Jiguang/Chinese Journal of Lasers,2015,42(9).
APA	Xu, S.,C. Chen,B. Sun,&X. Zhang and J. Ren.(2015).High-resolution imaging by Bi-linear CCD shifting sampling.Zhongguo Jiguang/Chinese Journal of Lasers,42(9).
MLA	Xu, S.,et al."High-resolution imaging by Bi-linear CCD shifting sampling".Zhongguo Jiguang/Chinese Journal of Lasers 42.9(2015).

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