Object brightness estimation from multiple coherent image plane irradiance measurements

William W. Arrasmith

doi:10.1117/12.364121

30 September 1999 Object brightness estimation from multiple coherent image plane irradiance measurements

William W. Arrasmith

Proceedings Volume 3815, Digital Image Recovery and Synthesis IV; (1999) https://doi.org/10.1117/12.364121
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Sampled irradiance measurement in the image plane of a coherently illuminated object are used to estimate the 2D object brightness profile in a shear beam imaging configuration. A field correlation function is used in a minimum variance irradiance estimation algorithm to optimally estimate the objects 2D brightness from a collection of sampled irradiance measurements on a grid of points in the image plane. The efficacy of the reconstruction method is demonstrated by reconstructing simulated coherently illuminated images of a symmetric extended object, an asymmetric extended object and also a spatially distended point source object. A theoretical error metric is determined and shown to compare favorably with simulated results over a range of object sizes.

Citation Download Citation

William W. Arrasmith "Object brightness estimation from multiple coherent image plane irradiance measurements", Proc. SPIE 3815, Digital Image Recovery and Synthesis IV, (30 September 1999); https://doi.org/10.1117/12.364121

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