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学者姓名:江竹青

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< Page ,Total 22 >
Phase-shift reconstruction imaging analysis in off-axis digital holographic microscopy with structured illumination CPCI-S
期刊论文 | 2022 , 12318 | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XII
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Abstract :

Reconstructing super-resolution images typically requires three or four phase-shift holograms for spectrum decomposing and combination. In the process of recording holograms, the phase shift accuracy of the instrument and environmental vibration will affect the spectrum decomposing results, resulting in reconstruction artifacts. In the simulation, with respect to two kinds of phase shift biases, the digital holographic reconstruction results with three-step and four-step phase-shift methods are compared. All the phase shift methods are much dependent on the accuracy of phase shift values. The four-step phase shift method needs to record more holograms, so its ability to cope with bias is poor, and its spectrum decomposing results is inferior to that with the three-step phase shift method. In a structured-illumination off-axis digital holographic system, the super-resolution imaging for amplitude and phase reconstructions is performed in experiment by using three-step phase shift processing. The results demonstrate that the resolution of the reconstructed images is improved.

Keyword :

phase-shift phase-shift super-resolution super-resolution off-axis digital holographic microscopy off-axis digital holographic microscopy structured illumination structured illumination

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GB/T 7714 Han, Yang , Huang, Meng , Jiang, Zhuqing . Phase-shift reconstruction imaging analysis in off-axis digital holographic microscopy with structured illumination [J]. | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XII , 2022 , 12318 .
MLA Han, Yang 等. "Phase-shift reconstruction imaging analysis in off-axis digital holographic microscopy with structured illumination" . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XII 12318 (2022) .
APA Han, Yang , Huang, Meng , Jiang, Zhuqing . Phase-shift reconstruction imaging analysis in off-axis digital holographic microscopy with structured illumination . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XII , 2022 , 12318 .
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Measurement of liquid refractive index by quantitative phase reconstruction of single frame dual-wavelength digital hologram SCIE
期刊论文 | 2022 , 206 | MEASUREMENT
WoS CC Cited Count: 2
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Abstract :

A measurement method of liquid's refractive index by means of single-shot dual-wavelength off-axis digital holographic microscopy system and a microfluidic chip is presented. The refractive index of liquid filled in the microchannel of a microfluidic chip can be calculated directly with the unwrapped phase map obtained at the synthetized wavelength, without requirement of knowing another liquid's refractive index as a measurement reference. Moreover, it also avoids the influence of the accuracy of the known refractive index on the refractive index to be measured. The refractive indices of salt solutions and sucrose solutions in the several concentrations are achieved in the experiments, which verifies that the measurement of liquid's refractive index is accurate and reliable. With the merit of accurate measurement of liquid's refractive index based on the one-frame dualwavelength hologram, it is expected that this approach will be employed to detect in real-time the fluid's parameters related to its refractive index.

Keyword :

Dual-wavelength Dual-wavelength Digital holography Digital holography Liquid Liquid Refractive index measurement Refractive index measurement Single-shot Single-shot

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GB/T 7714 Huang, Meng , Sun, Chan , Qin, Hongpeng et al. Measurement of liquid refractive index by quantitative phase reconstruction of single frame dual-wavelength digital hologram [J]. | MEASUREMENT , 2022 , 206 .
MLA Huang, Meng et al. "Measurement of liquid refractive index by quantitative phase reconstruction of single frame dual-wavelength digital hologram" . | MEASUREMENT 206 (2022) .
APA Huang, Meng , Sun, Chan , Qin, Hongpeng , Jiang, Zhuqing . Measurement of liquid refractive index by quantitative phase reconstruction of single frame dual-wavelength digital hologram . | MEASUREMENT , 2022 , 206 .
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Adaptive reconstruction imaging based on K-means clustering in off-axis digital holography
期刊论文 | 2022 , 1 (3) , 475-486 | OPTICS CONTINUUM
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An adaptive filtering method for off-axis digital holographic reconstruction is presented. The spatial spectrum distribution of an off-axis digital hologram is clustered based on the K-means clustering algorithm of unsupervised machine learning . The spatial-spectrum filtering can be carried out by the quantitative comparison of different filtering interception windows. The first-order spectrum including the object information can be automatically located and intercepted after clustering the spatial spectrum distribution of the hologram. The experiment results demonstrate that the reconstruction images with better resolution and imaging quality can be achieved by the adaptive filtering algorithm. This adaptive filtering reconstruction based on K-means clustering provides a new way of automatic reconstruction imaging for off-axis digital holography. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

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GB/T 7714 SUN, Q. I. U. Y. A. , LIU, Y. I. W. E. I. , CHEN, H. A. O. et al. Adaptive reconstruction imaging based on K-means clustering in off-axis digital holography [J]. | OPTICS CONTINUUM , 2022 , 1 (3) : 475-486 .
MLA SUN, Q. I. U. Y. A. et al. "Adaptive reconstruction imaging based on K-means clustering in off-axis digital holography" . | OPTICS CONTINUUM 1 . 3 (2022) : 475-486 .
APA SUN, Q. I. U. Y. A. , LIU, Y. I. W. E. I. , CHEN, H. A. O. , JIANG, Z. H. U. Q. I. N. G. . Adaptive reconstruction imaging based on K-means clustering in off-axis digital holography . | OPTICS CONTINUUM , 2022 , 1 (3) , 475-486 .
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High resolution reconstruction in off-axis digital holographic imaging by using aliasing-spectrum filtering CPCI-S
期刊论文 | 2021 , 11898 | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI
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Abstract :

We present a spectrum filtering approach for reconstruction of off-axis digital holograms. The high frequency aliasing terms in Fourier spectrum domain of hologram are generated by non-fitting interpolation. After interpolation processing, the zero-order terms in the aliasing spectrum region are obviously suppressed. Accordingly, for the spectrum filtering of high-frequency signal terms, the available range of frequency band will increase significantly, which can result in the improvement of resolution of the reconstructed images. In order to avoid the effect of non-uniform distribution on the aliasing spectrum terms, all the same-order signal terms in the aliasing spectrum (positive or negative first-order spectrum) are intercepted, respectively, and then added together to reconstruct the complex amplitude distribution of the sample. We perform the reconstruction imaging with a conventional method and the presented method from the same hologram in simulation. The imaging results show that such interpolation method can obviously improve the resolution of the reconstructed amplitude and phase images. This method for off-axis digital holographic reconstruction only relies on a single frame acquisition to achieve high resolution reconstruction imaging without additional requirements to the optical setup, which will have a promising application in real-time imaging for living biological cells or moving objects.

Keyword :

imaging resolution imaging resolution Off-axis digital holography Off-axis digital holography Spectrum filtering Spectrum filtering Kronecker production Kronecker production

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GB/T 7714 Liu, Yiwei , Wang, Yibo , Sun, Qiuya et al. High resolution reconstruction in off-axis digital holographic imaging by using aliasing-spectrum filtering [J]. | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
MLA Liu, Yiwei et al. "High resolution reconstruction in off-axis digital holographic imaging by using aliasing-spectrum filtering" . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI 11898 (2021) .
APA Liu, Yiwei , Wang, Yibo , Sun, Qiuya , Chen, Hao , Qin, Hongpeng , Jiang, Zhuqing . High resolution reconstruction in off-axis digital holographic imaging by using aliasing-spectrum filtering . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
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Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio CPCI-S
期刊论文 | 2021 , 11898 | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI
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Abstract :

In this paper, we present a method to eliminate the zero-order term in Fourier spectrum of off-axis digital holograms based on the linear change of the hologram. In a typical digital holographic setup, the three off-axis holograms are recorded by the object waves and the reference waves with the different intensity ratios. The three holograms were Fourier transformed, and then the spectra were linearly fitted to obtain two fitting coefficients. Then, the second and third holograms are multiplied by the corresponding coefficients, and the first hologram is subtracted from the hologram that is multiplied by the coefficient to obtain the hologram with the zero-order term eliminated. In the procedure of spectrum filtering, more high-frequency information can be intercepted in this spatial-frequency spectrum after removing the zero-order. The experiment results show that this method can obviously eliminate the zero-order term.

Keyword :

off-axis digital holography off-axis digital holography spectrum filtering spectrum filtering zero-order elimination zero-order elimination digital holographic imaging digital holographic imaging

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GB/T 7714 Chen, Hao , Liu, Yiwei , Sun, Qiuya et al. Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio [J]. | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
MLA Chen, Hao et al. "Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio" . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI 11898 (2021) .
APA Chen, Hao , Liu, Yiwei , Sun, Qiuya , Jiang, Zhuqing . Elimination of the zero-order term in off-axis digital holography by multiplexing light intensity ratio . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
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Automatic filtering processing in off-axis digital holography with clustering algorithm CPCI-S
期刊论文 | 2021 , 11898 | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI
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Abstract :

In this paper, automatic filtering for amplitude and phase reconstruction in off-axis digital holography is developed. A user-friendly interface for automatic filtering is given via program design with MATLAB. The hologram to be processed is input at the front end, and automatic spectrum filtering in Fourier spectrum domain of digital holograms is realized by using clustering algorithm at the back end. The amplitude and phase images are reconstructed from the intercepted spatial-frequency spectrum by using the reconstruction algorithm. This automatic filtering program has high robustness, which can achieve reconstruction imaging for off-axis holograms correctly and effectively in the case of different off-axis angles or different image sizes. For the user interface, upon inputting an off-axis digital hologram and confirming the operation, the reconstructed amplitude and phase images can be quickly output. This user interface has the advantages of simple operation, adjustable parameters and clear feedback. Since K-means clustering is used, this filtering algorithm increases the efficiency in processing experimental data and the reliability of reconstruction imaging. The digital hologram computer-generated is used to simulate filtering processing. The results show that the quality of reconstructed images by using the presented automatic filtering is not inferior to that by conventional manual filtering.

Keyword :

user interface user interface adaptive filtering adaptive filtering clustering algorithm clustering algorithm off-axis digital holography off-axis digital holography

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GB/T 7714 Sun, Qiuya , Liu, Yiwei , Chen, Hao et al. Automatic filtering processing in off-axis digital holography with clustering algorithm [J]. | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
MLA Sun, Qiuya et al. "Automatic filtering processing in off-axis digital holography with clustering algorithm" . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI 11898 (2021) .
APA Sun, Qiuya , Liu, Yiwei , Chen, Hao , Wang, Yibo , Jiang, Zhuqing . Automatic filtering processing in off-axis digital holography with clustering algorithm . | HOLOGRAPHY, DIFFRACTIVE OPTICS, AND APPLICATIONS XI , 2021 , 11898 .
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Real-time quantitative phase imaging by single-shot dual-wavelength off-axis digital holographic microscopy SCIE
期刊论文 | 2021 , 60 (15) , 4418-4425 | APPLIED OPTICS
WoS CC Cited Count: 10
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Abstract :

A single-shot dual-wavelength digital holographic microscopy with an adjustable off-axis configuration is presented, which helps realize real-time quantitative phase imaging for living cells. With this configuration, two sets of interference fringes corresponding to their wavelengths can be flexibly recorded onto one hologram in one shot. The universal expression on the dual-wavelength hologram recorded under any wave vector orientation angles of reference beams is given. To avoid as much as possible the effect of zero-order spectrum, we can flexibly select their carry frequencies for the two wavelengths using this adjustable off-axis configuration, according to the distribution feature of object's spatial-frequency spectrum. This merit is verified by a quantitative phase imaging experiment for the microchannel of a microfluidic chip. The reconstructed phase maps of living onion epidermal cells exhibit cellular internal life activities, for the first time to the best of our knowledge, vividly displaying the progress of the nucleus, cell wall, cytoskeleton, and the substance transport in microtubules inside living cells. These imaging results demonstrate the availability and reliability of the presented method for real-time quantitative phase imaging. (C) 2021 Optical Society of America

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GB/T 7714 Huang, Meng , Qin, Hongpeng , Jiang, Zhuqing . Real-time quantitative phase imaging by single-shot dual-wavelength off-axis digital holographic microscopy [J]. | APPLIED OPTICS , 2021 , 60 (15) : 4418-4425 .
MLA Huang, Meng et al. "Real-time quantitative phase imaging by single-shot dual-wavelength off-axis digital holographic microscopy" . | APPLIED OPTICS 60 . 15 (2021) : 4418-4425 .
APA Huang, Meng , Qin, Hongpeng , Jiang, Zhuqing . Real-time quantitative phase imaging by single-shot dual-wavelength off-axis digital holographic microscopy . | APPLIED OPTICS , 2021 , 60 (15) , 4418-4425 .
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基于克罗内克积插值的离轴数字全息成像重建方法 incoPat
专利 | 2020-11-29 | CN202011365760.4
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一种基于克罗内克积插值的离轴数字全息重建方法,涉及数字全息成像技术领域。本发明记录样品的离轴数字全息图,采用一个常数矩阵对离轴数字全息图作克罗内克积插值处理,对插值后的全息图作傅里叶变换得到包括新增混叠频谱区域的插值频谱图,将混叠频谱区域相加并用其替换原有区域分布,截取混叠频谱区域中的正一级或负一级频谱项移动到频谱域中心,作逆傅里叶变换后进行角谱传播重建复振幅分布,得到成像重建的振幅图和相位图。本方法有利于由样品的离轴数字全息图重建其高分辨的振幅分布和相位分布。

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GB/T 7714 刘毅伟 , 江竹青 , 王医博 et al. 基于克罗内克积插值的离轴数字全息成像重建方法 : CN202011365760.4[P]. | 2020-11-29 .
MLA 刘毅伟 et al. "基于克罗内克积插值的离轴数字全息成像重建方法" : CN202011365760.4. | 2020-11-29 .
APA 刘毅伟 , 江竹青 , 王医博 , 孙秋雅 , 陈浩 , 秦宏鹏 . 基于克罗内克积插值的离轴数字全息成像重建方法 : CN202011365760.4. | 2020-11-29 .
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Single-frame reconstruction for improvement of off-axis digital holographic imaging based on image interpolation SCIE
期刊论文 | 2020 , 45 (24) , 6623-6626 | OPTICS LETTERS
WoS CC Cited Count: 8
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We present a method of single-frame reconstruction in off-axis digital holography with Kronecker-product interpolation to maximize spatial-frequency extraction. The Kronecker-product interpolation operated on a one-frame off-axis digital hologram can generate several aliasing spectra in its Fourier domain, where the zero-order aliasing spectra in the extrapolation region can be suppressed effectively. After adding all aliasing spectrum regions and substituting each aliasing spectrum in place with their sum, spectrum interception with a larger scope for filtering can be made in one of the aliasing spectrum regions. The experimental results demonstrate that the method is valid to improve the resolution in off-axis digital holography. (C) 2020 Optical Society of America

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GB/T 7714 Liu, Yiwei , Jiang, Zhuqing , Wang, Yibo et al. Single-frame reconstruction for improvement of off-axis digital holographic imaging based on image interpolation [J]. | OPTICS LETTERS , 2020 , 45 (24) : 6623-6626 .
MLA Liu, Yiwei et al. "Single-frame reconstruction for improvement of off-axis digital holographic imaging based on image interpolation" . | OPTICS LETTERS 45 . 24 (2020) : 6623-6626 .
APA Liu, Yiwei , Jiang, Zhuqing , Wang, Yibo , Sun, Qiuya , Chen, Hao . Single-frame reconstruction for improvement of off-axis digital holographic imaging based on image interpolation . | OPTICS LETTERS , 2020 , 45 (24) , 6623-6626 .
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Optimization of High-Resolution Reconstruction Algorithm for Off-axis Digital Holographic Imaging CPCI-S
会议论文 | 2020 , 11551 | Conference on Holography, Diffractive Optics, and Applications X
WoS CC Cited Count: 2
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Abstract :

In this paper, an off-axis digital holography multi-frame image super-resolution reconstruction method is presented. Each low-resolution hologram will have small displacement in different directions. The obtained low-resolution holograms are processed iteratively with the super-resolution algorithm to obtain the super-resolution hologram, and then the amplitude image is reconstructed from the super-resolution hologram. The imaging results show that the resolution of the reconstructed image after super-resolution processing is obviously improved, because of increase of high-frequency information in the high-resolution hologram.

Keyword :

imaging resolution imaging resolution phase reconstruction phase reconstruction imaging reconstruction algorithm imaging reconstruction algorithm super-resolution imaging super-resolution imaging Digital holography Digital holography

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GB/T 7714 Wang, Yibo , Liu, Yiwei , Chen, Hao et al. Optimization of High-Resolution Reconstruction Algorithm for Off-axis Digital Holographic Imaging [C] . 2020 .
MLA Wang, Yibo et al. "Optimization of High-Resolution Reconstruction Algorithm for Off-axis Digital Holographic Imaging" . (2020) .
APA Wang, Yibo , Liu, Yiwei , Chen, Hao , Sun, Qiuya , Jiang, Zhuqing . Optimization of High-Resolution Reconstruction Algorithm for Off-axis Digital Holographic Imaging . (2020) .
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