![]() The image is computationally recovered from the fluctuations of the electric signal provided by the detector. SPCs are based on sampling the scene with a sequence of microstructured light patterns codified onto a programmable spatial light modulator (SLM), while the intensity of the light coming from the object is measured by a detector without spatial resolution. The results of the model are compared with those obtained experimentally with a SPC.Ĭomputational imaging with a single-pixel camera (SPC), or single-pixel imaging (SPI), is a remarkable alternative to conventional imaging. In particular, we study the SNR as a function of the optical power of the incident light, the wavelength, and the photodiode temperature. This model includes the abovementioned noise sources and infers the signal-to-noise ratio (SNR) of the SPCs in different contexts. In this chapter, we develop a numerical model of a SPC based on a photodiode, which considers the characteristics of the incident light, as well as the photodiode specifications. One factor that degrades the signal quality is the noise, in particular, the photocurrent, the dark-current, and the thermal noise sources. In this context, the signal quality is of capital value. ![]() The image is recovered computationally from the photodiode electric signal. The light coming from the scene is collected by a bucket detector, such as a photodiode. In these techniques, the scene is illuminated with a sequence of microstructured light patterns codified onto a programmable spatial light modulator. Single-pixel cameras (SPCs) have been successfully used in different imaging applications during the last decade.
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