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single pixel imaging based on semi-continuous wavelet transform

Chinese Physics B 2021年第7期30卷 244-252页

作者：高超王晓茜王爽苟立丹冯玉玲金光勇姚治海 Department of Physics Changchun University of Science and TechnologyChangchun 130022China Jilin Key Laboratory of Solid Laser Technology and Application Changchun University of Science and TechnologyChangchun 130022China

single pixel imaging is a novel imaging technique,and it becomes a focus of research in recent years due to its advantages such as high lateral resolution and high robustness to noise.imaging speed is one of the critical shortcomings,which limits the further development and applications of this technique.In this paper,we focus on the issues of imaging efficiency of a single pixel imaging system.We propose semi-continuous wavelet transform(SCWT)protocol and introduce the protocol into the single pixel imaging system.The proposed protocol is something between continuous wavelet transform and discrete wavelet transform,which allows the usage of those smooth(usually non-orthogonal,and they have advantages in representing smooth signals compressively,which can improve the imaging speed of single pixel imaging)wavelets and with limited numbers of measurements.The proposed imaging scheme is studied,and verified by simulations and experiments.Furthermore,a comparison between our proposed scheme and existing imaging schemes are given.According to the results,the proposed SCWT scheme is proved to be effective in reconstructing a image compressively.

关键词： single pixel imaging wavelet transform modulation of light source

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单像素成像的乘法关联调控仿真与实验

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建模与仿真 2024年第2期13卷 1501-1510页

作者：朱宗晶上海理工大学光电信息与计算机工程学院，上海

单像素成像是一种新型的成像方式，仅需一个单像素探测器配合空间光调制器便能对物体成像。已有单像素成像的研究集中在调制方式、重建算法和应用领域等方面，局限于固定不变的掩模与探测值之间的一一对应关系，给单像素成像的功能性拓... 详细信息

单像素成像是一种新型的成像方式，仅需一个单像素探测器配合空间光调制器便能对物体成像。已有单像素成像的研究集中在调制方式、重建算法和应用领域等方面，局限于固定不变的掩模与探测值之间的一一对应关系，给单像素成像的功能性拓展造成了阻碍。本文提出了一种基于单像素成像的乘法关联调控，使用探测值与受控掩模重建得到被调控的物体，实现对物体的间接调控，不仅有效地拓展了单像素成像的功能，也为关联调控的发展提供了一种可借鉴的方案。

关键词：单像素成像关联调控空间光调制器 single pixel imaging Correlated Manipulation Spatial Light Modulator

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single Photon Compressive imaging Based on Digital Grayscale Modulation Method

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Photonic Sensors 2021年第3期11卷 350-361页

作者： Chenglong Yuan Qiurong Yan Yiqiang Wu Yifan Wang Yuhao Wang School of Information Engineering Nanchang UniversityNanchang330031China

In single-pixel imaging or computational ghost imaging,the measurement matrix has a great impact on the performance of the imaging system,because it involves modulation of the optical signal and image reconstruction.The measurement matrix reported in the existing literatures is first binarized and then loaded onto the digital micro-mirror device(DMD)for optical modulation,that is,each pixel can only be modulated into on-off states.In this paper,we propose a digital grayscale modulation method for more efficient compressive sampling.On the basis of this,we demonstrate a single photon compressive imaging system.A control and counting circuit,based on field-programmable gate array(FPGA),is developed to control DMD to conduct digital grayscale modulation and count single-photon pulse output from the photomultiplier tube(PMT)simultaneously.The experimental results show that the imaging reconstruction quality can be improved by increasing the sparsity ratio properly and compressive sampling ratio(SR)of these gray-scale matrices.However,when the compressive SR and sparsity ratio are increased appropriately to a certain value,the reconstruction quality is usually saturated,and the imaging reconstruction quality of the digital grayscale modulation is better than that of binary modulation.

关键词： single photon imaging single pixel imaging measurement matrix grayscale modulation

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