Improving image quality by using CCD subpixel imaging

	Improving image quality by using CCD subpixel imaging
	Li, Y. and B. He
	2015
发表期刊	Guangxue Xuebao/Acta Optica Sinica
卷号	35 期号:2
摘要	In order to overcome the disadvantages in existing charge coupled device (CCD) subpixel imaging realization ways, such as complex structure, high subpixel precision and so on, a subpixel imaging method with single CCD camera by using high precision two-axis translation table to imaging the target at a certain distance is proposed and implemented. The multiple low-resolution images, which have half-pixel shift with each other attained by photographing target in fixed object distance using the proposed method, are interpolated and reconstructed based on cubic B spline interpolation and interlacing, and high resolution images are achieved. Then, point spread function is estimated by using knife edge method, and final high resolution image is got after performing image restoration to above reconstructed high resolution image. Results show that visual spatial resolution is improved to 1.4 times and image aliasing effect is reduced by using subpixel imaging and modulation transfer function area (MTFA) is increased to 0.2937 from 0.1577 by performing image restoration. Experiment demonstrates that subpixel imaging can enhance spatial resolution, reduce image aliasing and improve image quality. Image restoration can effectively compensate modulation transfer function (MTF) of reconstructed high resolution image, which solves the problem of spatial resolution enhancement but MTF reduction in subpixel imaging. , 2015, Chinese Optical Society. 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/181722/56172
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Li, Y. and B. He. Improving image quality by using CCD subpixel imaging[J]. Guangxue Xuebao/Acta Optica Sinica,2015,35(2).
APA	Li, Y. and B. He.(2015).Improving image quality by using CCD subpixel imaging.Guangxue Xuebao/Acta Optica Sinica,35(2).
MLA	Li, Y. and B. He."Improving image quality by using CCD subpixel imaging".Guangxue Xuebao/Acta Optica Sinica 35.2(2015).

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