Single-pixel polarimetric imaging spectrometer by compressive sensing

Abstract

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Compressive Sampling Multispectral Imaging and Unmixing Method for Fluorescent Imaging

“…A recent work [10] has also demonstrated that multispectral images can be acquired sequentially through a CS based single pixel imaging scheme. The question is: can multispectral images acquired from this CS based single pixel imaging scheme be well spectral unmixed?…”

“…Compressive sampling (CS) is an efficient signal acquisition protocol that is able to reconstruct the signal from an apparent incomplete set of measurements by utilizing the fact that many natural signals are sparse or compressible when expressed in a proper function basis [9]. The object reconstruction can be achieved by solving a convex optimization program [10].…”

Low-cost single-pixel 3D imaging by using an LED array

“…This is the case of imaging with low light levels or with electromagnetic radiation in spectral ranges out of the visible region, particularly in the near IR and terahertz spectral bands, where it is more difficult to make a pixelated sensor [1][2][3]. Imaging with single-pixel detectors can be useful also when the purpose is to measure the spatial distribution of several optical parameters of the light beam simultaneously, not only the intensity but also the polarization state [4], the phase [5,6], the color [7][8][9][10], or the spectral content [11][12][13][14][15][16] Single-pixel imaging techniques [25,26] are based on illuminating the scene with a sequence of light structured patterns while the light reflected or transmitted by the objects is recorded by a single photosensor such as a photodiode or photomultiplier tube (PMT). Alternatively to this active imaging system, where a spatial light modulator (SLM) modifies the input light beam, in the passive configuration the light coming from the object is sampled sequentially by a set of masks codified in the SLM.…”

Full-color stereoscopic imaging with a single-pixel photodetector

“…It also allows measuring the spatial distribution of multiple physical dimensions of the scene in a simple way. In this direction, single-pixel detection arquitectures have been designed for polarimetric imaging [8], color or multispectral imaging [9,10], time-of-flight imaging [11,12] or holography [13]. Moreover, single-pixel detectors provide a broader spectral range compared to conventional cameras, permitting to extend imaging techniques to different spectral regions [14,15].…”