Abstract
By first-order statistics of speckle we mean the statistics observed at a point in space or a point in time, with the statistics being over an ensemble of rough surfaces or rough diffusers. First we consider the statistics of speckle complex amplitude, relevant when using ultrasound or microwave illumination of surfaces that are rough on the scale of their individual wavelengths. For such imaging modalities, it is possible to measure both the magnitude and the phase of the wavefields. In Chapter 3 we turn to the statistics of speckle intensity, which is the most relevant quantity for the optical region of the spectrum, where a detector can measure only intensity unless some form of interferometry is used.
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