We propose a compressed ghost imaging scheme based on differential speckle patterns,named CGI-DSP.In the scheme,a series of bucket detector signals are acquired when a series of random speckle patterns are employed to...We propose a compressed ghost imaging scheme based on differential speckle patterns,named CGI-DSP.In the scheme,a series of bucket detector signals are acquired when a series of random speckle patterns are employed to illuminate an unknown object.Then the differential speckle patterns(differential bucket detector signals)are obtained by taking the difference between present random speckle patterns(present bucket detector signals)and previous random speckle patterns(previous bucket detector signals).Finally,the image of object can be obtained directly by performing the compressed sensing algorithm on the differential speckle patterns and differential bucket detector signals.The experimental and simulated results reveal that CGI-DSP can improve the imaging quality and reduce the number of measurements comparing with the traditional compressed ghost imaging schemes because our scheme can remove the environmental illuminations efficiently.展开更多
鬼成像方案实现所需设备、成像的质量以及成像所花的时间是决定鬼成像技术可实用化的重要因素.本文提出一种针对多散斑图的差分压缩鬼成像方案.该方案通过连续探测多个独立的散斑图,降低了热光鬼成像方案对探测器高时间分辨力的要求;通...鬼成像方案实现所需设备、成像的质量以及成像所花的时间是决定鬼成像技术可实用化的重要因素.本文提出一种针对多散斑图的差分压缩鬼成像方案.该方案通过连续探测多个独立的散斑图,降低了热光鬼成像方案对探测器高时间分辨力的要求;通过采用差分方法,抑制了背景噪声和其他噪声源的干扰;通过使用压缩感知重建算法,有效地降低了鬼成像所需时间并同时提升成像的质量.数值仿真结果表明,对于二灰度"N"图,本方案在8000次的采样情形下与多散斑图鬼成像方案35000次采样的结果相比,均方误差降低了96.9%、峰值信噪比提升15.1 d B.对于八灰度"Pepper"图,本方案与多散斑图鬼成像方案相比,PSNR提升11.4 d B.本方案可降低探测设备的要求、提高成像质量、降低重建时间,具有广阔的应用前景.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11847062 and 61871234)the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20180755)the Science Fund from NUPT(Grant No.NY218098).
文摘We propose a compressed ghost imaging scheme based on differential speckle patterns,named CGI-DSP.In the scheme,a series of bucket detector signals are acquired when a series of random speckle patterns are employed to illuminate an unknown object.Then the differential speckle patterns(differential bucket detector signals)are obtained by taking the difference between present random speckle patterns(present bucket detector signals)and previous random speckle patterns(previous bucket detector signals).Finally,the image of object can be obtained directly by performing the compressed sensing algorithm on the differential speckle patterns and differential bucket detector signals.The experimental and simulated results reveal that CGI-DSP can improve the imaging quality and reduce the number of measurements comparing with the traditional compressed ghost imaging schemes because our scheme can remove the environmental illuminations efficiently.
文摘鬼成像方案实现所需设备、成像的质量以及成像所花的时间是决定鬼成像技术可实用化的重要因素.本文提出一种针对多散斑图的差分压缩鬼成像方案.该方案通过连续探测多个独立的散斑图,降低了热光鬼成像方案对探测器高时间分辨力的要求;通过采用差分方法,抑制了背景噪声和其他噪声源的干扰;通过使用压缩感知重建算法,有效地降低了鬼成像所需时间并同时提升成像的质量.数值仿真结果表明,对于二灰度"N"图,本方案在8000次的采样情形下与多散斑图鬼成像方案35000次采样的结果相比,均方误差降低了96.9%、峰值信噪比提升15.1 d B.对于八灰度"Pepper"图,本方案与多散斑图鬼成像方案相比,PSNR提升11.4 d B.本方案可降低探测设备的要求、提高成像质量、降低重建时间,具有广阔的应用前景.
