Journal ArticleDOI
Maximum-likelihood multiresolution laser radar range imaging
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It is shown that the weights associated with the expectation-maximization iterations provide a reliable indicator for terminating the coarse-to-fine resolution progression and at the weight-determined stopping point, estimation performance approaches the ultimate limit set by the complete-data bound.Abstract:
Maximum-likelihood range imaging is considered for pulsed-imager operation of a coherent laser radar. The expectation-maximization (EM) algorithm is used to develop an explicit procedure for maximum-likelihood fitting of a multiresolution (wavelet) basis-at a sequence of increasingly fine resolutions-to laser radar range data. Specialization to the Haar-wavelet basis yields a procedure that is both computationally efficient and numerically robust. Basic analytical properties of the estimation algorithm and its performance are presented, along with results based on simulated and real laser radar range data. It is shown that the weights associated with the expectation-maximization iterations provide a reliable indicator for terminating the coarse-to-fine resolution progression. At the weight-determined stopping point, estimation performance approaches the ultimate limit set by the complete-data bound.read more
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References
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Statistical properties of laser sparkle patterns
TL;DR: In this article, the first order statistics of the observed electric-field strength, the observed light intensity, and observed light phase are examined, and the autocorrelation functions of the complex field and intensity processes are investigated, and that of the electric field is found to be proportional to the Fourier transform of the light intensity distribution incident on the scattering surface.
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Statistical Properties of Laser Speckle Patterns
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Detection of Optical and Infrared Radiation
R. H. Kingston,Henry Levinstein +1 more
TL;DR: In this article, the Ideal Photon Detector and Coherent or Heterodyne Detection are discussed, as well as the effects of atmospheric turbulence on detector performance.