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A STUDY ON PENETRATION DEPTH OF polarization imaging

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Journal of Innovative Optical Health Sciences 2010年第3期3卷 177-181页

作者： RAN LIAO NAN ZENG DONGZHI LI TIANLIANG YUN YONGHONG HE HUI MA Laboratory of Optical imaging and Sensing Graduate School at Shenzhen Tsinghua University Shenzhen 518055China Key Laboratory for Molecular and Nanosciences of Education Ministry Department of Physics Tsinghua University Beijing 100084China

Optical clearing improves the penetration depth of optical measurements in turbid *** imaging has been demonstrated as a potentially promising tool for detecting cancers in superficial tissues,but its limited depth of detection is a major obstacle to the effective application in clinical *** the present paper,detection depths of two polarization imaging methods,i.e.,rotating linear polarization imaging(RLPI)and degree of polarization imaging(DOPI),are examined quantitatively using both experiments and Monte Carlo *** results show that the contrast curves of RLPI and DOPI are *** characteristic depth of DOPI scales with transport mean free path length,and that of RLPI increases slightly with *** characteristic depths of RLPI and DOPI are on the order of transport mean free path length and the former is almost twice as large as the *** is expected that they should have different response to optical clearing process in tissues.

关键词： polarization imaging penetration depth optical scattering

Identification of serous ovarian tumors based on polarization imaging and correlation analysis with clinicopathological features

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Journal of Innovative Optical Health Sciences 2023年第5期16卷 33-46页

作者： Yulu Huang Anli Hou Jing Wang Yue Yao Wenbin Miao Xuewu Tian Jiawen Yu Cheng Li Hui Ma Yujuan Fan Department of Gynaecology Wuzhou Red Cross HospitalWuzhou Guangxi 543002P.R.China Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Guangdong Engineering Center of polarization imaging and Sensing Technology Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhenGuangdong 518055P.R.China Department of Gynaecology University of Chinese Academy of Sciences Shenzhen HospitalShenzhen Guangdong 518106P.R.China Tsinghua-Berkeley Shenzhen Institute Tsinghua University ShenzhenGuangdong 518071P.R.China |Department of Physics Tsinghua University Beijing 100084P.R.China Department of Pathology University of Chinese Academy of Sciences Shenzhen HospitalShenzhen Guangdong 518106P.R.China Department of Pathology Wuzhou Red Cross Hospital Wuzhou Guangxi 543002P.R.China

Ovarian cancer is one of the most aggressive and heterogeneous female tumors in the world,and serous ovarian cancer(SOC)is of particular concern for being the leading cause of ovarian cancer *** to its clinical and biological complexities,ovarian cancer is still considered one of the most di±cult tumors to diagnose and *** this study,three datasets were assembled,including 30 cases of serous cystadenoma(SCA),30 cases of serous borderline tumor(SBT),and 45 cases of serous adenocarcinoma(SAC).Mueller matrix microscopy is used to obtain the polarimetry basis parameters(PBPs)of each case,combined with a machine learning(ML)model to derive the polarimetry feature parameters(PFPs)for distinguishing serous ovarian tumor(SOT).The correlation between the mean values of PBPs and the clinicopathological features of serous ovarian cancer was *** accuracies of PFPs obtained from three types of SOT for identifying dichotomous groups(SCA versus SAC,SCA versus SBT,and SBT versus SAC)were 0.91,0.92,and 0.8,*** accuracy of PFP for identifying triadic groups(SCA versus SBT versus SAC)was *** analysis between PBPs and the clinicopathological features of SOC was *** were correlations between some PBPs(δ,β,q_(L),E_(2),rqcross,P_(2),P_(3),P_(4),and P_(5))and clinicopathological features,including the International Federation of Gynecology and Obstetrics(FIGO)stage,pathological grading,preoperative ascites,malignant ascites,and peritoneal *** research showed that PFPs extracted from polarization images have potential applications in quantitatively differentiating the *** polarimetry basis parameters related to the clinicopathological features of SOC can be used as prognostic factors.

关键词： Serous ovarian tumor(SOT) polarimetry basis parameter(PBP) polarimetry feature parameter(PFP) polarization imaging machine learning(ML).

Influence of absorption in linear polarization imaging of melanoma tissues

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Journal of Innovative Optical Health Sciences 2014年第3期7卷 59-66页

作者： Dongzhi Li Honghui He Nan Zeng Weidong Xie Ran Liao Jian Wu Yonghong He Hui Ma Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Graduate School at Shenzhen Tsinghua UniversityShenzhen 518055P.R.China Department of Physics Tsinghua University Beijing 100084P.R.Chinat

The contrast mechanism of different polarization imaging techniques for melanoma in mouse skin is st udied using both experiments and Monte Carlo *** intensity,linear polariz-ation diference imaging(DPI),degree of polarization imaging(DOPI)and'rotating linearpolarization imaging(RLPl)are applied and the relative contrasts of these polarization imagingmethods between the normal and cancerous tissues are compared.A two-layer absorption-scat-tering model is proposed to explain the contrast mechanism of the polarization imaging *** taking into account of both scattering of symmetrical and asymmetrical scat terersand absorption of inter-scatterer medium,the two-layer model reproduces the relative con trastsfor polarization images observed in *** simulation results also show that,theparameters of polarization imaging change more dramatically with the variation of absorption inthe bottom layer than the top layer.

关键词： polarization imaging melanoma two-layer model Monte Carlo simulation.

Optical polarization imaging for underwater target detection with non-scatter background

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Journal of Measurement Science and Instrumentation 2020年第4期11卷 335-342页

作者： GUAN Jin-ge ZHAO Yong ZHENG Yong-qiu MA Miao SUN Peng XUE Chen-yang School of Information and Communication Engineering North University of ChinaTaiyuan 030051China Beijing Institute of Computer Application Technology China North Industries Group Corporation LimitedBeijing 100089China Key Laboratory of Instrumentation Science and Dynamic Measurement(North University of China) Ministry of EducationTaiyuan 030051China Department of Science Taiyuan Institute of TechnologyTaiyuan 030008China

For conventional optical polarization imaging of underwater target,the polarization degree of backscatter should be pre-measured by averaging the pixel intensities in the no target region of the polarization images,and the polarization property of the target is assumed to be completely *** the scattering background is unseen in the field of view or the target is polarized,conventional method is helpless in detecting the *** improvement is to use lots of co-polarization and cross polarization detection *** propose a polarization subtraction method to estimate depolarization property of the scattering noise and target *** experiment in a quartz cuvette container is performed to demonstrate the effectiveness of the proposed *** results show that the proposed method can work without scattering background reference,and further recover the target along with smooth surface for polarization preserving *** study promotes the development of optical polarization imaging systems in underwater environments.

关键词： polarization imaging underwater optical scattering optical information processing target detection

A New polarization Image Demosaicking Method in the Frequency Domain for DoFP polarization imaging

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A New Polarization Image Demosaicking Method in the Frequenc...

Comparative study of differential polarization imaging using linear and circular polarization in different scattering medium

第三十九届中国控制会议

作者： Jinglei Hao Yongqiang Zhao Wuteng Liu School of Automation Northwestern Polytechnical University Research & Development Institute of Northwestern Polytechnical University The 2~(nd) Research Institute of China Electronics Technology Group Corporation

Nowadays, the division of focal plane（DoFP） polarimeter attracts more and more attention due to its compact dimensions, lightweight, simple front-end optical system and real-time capability. However, the instantaneous field of view（IFoV） error is an inherent defect of DoFP polarization imaging system due to the spatial sampling mode of the *** methods were put forward to deal with such problems through complementing the missing polarization information in most cases. In this paper, we propose a new polarization image demosaicking method in the frequency domain for DoFP polarimeters. Combined with our previous work, we analyze the frequency characteristics of micro-polarizer array（MPA）-filtered images based on the frequency structure. The least square method is utilized to design filter to reduce the impact of crosstalk, and redundant frequency components are weighed and summed to improve the recovery performance. Experimental results verify the effectiveness of our proposed method, and both PSNR value and visual effects of our method are better than the traditional interpolation methods.

关键词： polarization imaging Image demosaicking IFoV error Micro-polarizer array Frequency domain

来源： cnki会议评论

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Journal of Measurement Science and Instrumentation 2022年第2期13卷 173-183页

作者： TIAN Heng WU Yelin TIAN Jingjing ZHANG Bo ZHU Jingping School of Physics and Electronic Information Engineering Henan Polytechnic University Jiaozuo 454003 China Shaanxi Key Lab of Information Photonic Technique Xi’an Jiaotong University Xi’an 710049 China

Differential polarization imaging has been widely used to selectively probe the target embedded in turbid medium.A thorough understanding of image quality involved in differential polarization imaging is essential for practical *** polarized light Monte Carlo simulations,it has been investigated how the state of polarization of incident light and the optical properties of scattering medium affect the image *** contrast for linear polarization is similar to that for circular polarization in the isotropic medium comprising *** image quality is more pronounced for circular polarization in the isotropic medium containing large-particles and the birefringent ***,differential polarization imaging provides better image quality for the birefringent medium compared with isotropic *** effect of particle-size and birefringence on the polarization characteristics of target light and backscattered light is *** the help of numerical results,the polarization characteristics of target light and backscattered light,the image quality is well explained in the turbid medium mentioned above.

关键词： polarization imaging target detection Monte Carlo simulation scattering birefringence

polarization descattering imaging: a solution for nonuniform polarization characteristics of a target surface

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Chinese Optics Letters 2021年第11期19卷 38-43页

作者： Yi Wei Pingli Han Fei Liu Jinpeng Liu Xiaopeng Shao School of Physics and Optoelectronic Engineering Xidian UniversityXi’an 710071China Xi’an Key Laboratory of Computational imaging Xi’an 710071China Key Laboratory of Optical Engineering Chinese Academy of SciencesChengdu 610209China

This paper presents a polarization descattering imaging method for underwater detection in which the targets have nonuniform polarization characteristics. The core of this method takes the nonuniform distribution of the polarization information of the target-reflected light into account and expands the application field of underwater polarization *** component analysis was used to separate the target light and backscattered light. Theoretical analysis and proof-of-concept experiments were employed to demonstrate the effectiveness of the proposed method in estimating target information. The proposed method showed superiority in accurately estimating the target information compared with other polarization imaging methods.

关键词： polarization imaging clear vision scattering

Inverse-designed Jones matrix metasurfaces for high-performance meta-polarizers

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Chinese Optics Letters 2024年第2期22卷 192-199页

作者：王志强李枫竣邓倩媚万舟李向平邓子岚 Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics TechnologyJinan UniversityGuangzhou 510632China

Polarizers have always been an important optical component for optical engineering and have played an indispensable part of polarization imaging *** polarizers provide an excellent platform to achieve miniaturization,high resolution,and low cost of polarization imaging ***,we proposed freeform metasurface polarizers derived by adjoint-based inverse design of a full-Jones matrix with gradient-descent *** designed multiple freeform polarizers with different filtered states of polarization(SOPs),including circular polarizers,elliptical polarizers,and linear polarizers that could cover the full Poincaré*** that near-unitary polarization dichroism and the ultrahigh polarization extinction ratio(ER)reaching 50 d B were achieved for optimized circular *** multiple freeform polarizers with filtered polarization state locating at four vertices of an inscribed regular tetrahedron of the Poincarésphere are designed to form a full-Stokes parameters micropolarizer *** work provides a novel approach,we believe,for the design of meta-polarizers that may have potential applications in polarization imaging,polarization detection,and communication.

关键词： metasurface inverse design Jones matrix polarization imaging

Research on a multi‑dimensional image information fusion algorithm based on NSCT transform

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Frontiers of Optoelectronics 2024年第1期17卷 29-44页

作者： Yuxiang Su Xi Liang Danhua Cao Zhenyu Yang Yuanlong Peng Ming Zhao School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China State Grid Information and Telecommunication Branch Beijing 100761China

Traditional inspection cameras determine targets and detect defects by capturing images of their light intensity,but in complex environments,the accuracy of inspection may *** based on polarization of light can characterize various features of a material,such as the roughness,texture,and refractive index,thus improving classification and recognition of *** paper uses a method based on noise template threshold matching to denoise and preprocess polarized *** also reports on design of an image fusion algorithm,based on NSCT transform,to fuse light intensity images and polarized *** results show that the fused image improves both subjective and objective evaluation indicators,relative to the source image,and can better preserve edge information and help to improve the accuracy of target *** study provides a reference for the comprehensive application of multi-dimensional optical information in power inspection.

关键词： Power inspection Object detection polarization imaging Image fusion Image denoising