ABSTRACT
This chapter presents speckle imaging techniques, and provides examples of the performance of speckle imaging. It also presents a brief overview of speckle imaging. The chapter discusses speckle interferometry, which is used to obtain an estimate of the modulus of the Fourier transform of the object. It also provides results showing the signal-to-noise ratio performance of the speckle interferometry method across a range of seeing and light level conditions. The chapter describes the Knox-Thompson and bispectrum methods for estimating the phase spectrum of an object. It also discusses the details of reconstructing an image from speckle imaging measurements and computations. Simulations are an important aspect of understanding the performance limits of techniques for imaging through turbulence. The chapter addresses the problem of reconstructing the object phase spectrum from the phase of the cross spectrum. It analyses the problem of obtaining an unbiased estimator for the photon and additive noise effects.
