A Monte Carlo model has been used to compute a set of point-spread functions (PSF's) and modulation transfer functions (MTF's) that determine underwater-image quality in a range of different environments. The results have been used to analyze the range of application under which a linear-approximation theory holds. Conclusions of the study are that the linear-approximation theory seems to hold quite well over a broad range of applications. The ramifications of the Wells small-angle-scattering theory that predicts the PSF from a knowledge of the volume-scattering function (VSF) are also considered.
Discrepancies are noted between a predicted and a computationally obtained MTF; these discrepancies increase with range. Therefore, the results of the simulations indicate that the small-angle-scattering theory is more valid at a limited number of attenuation lengths. The results of the simulations indicate that the theory is valid to approximately three attenuation lengths.
© 1995 Optical Society of AmericaFull Article | PDF Article
More Like This
Nancy L. Swanson, Barton D. Billard, Victor M. Gehman, and Theresa L. Gennaro
Appl. Opt. 40(21) 3608-3613 (2001)
Deric J. Gray
Appl. Opt. 51(28) 6753-6764 (2012)
Phillip N. Reinersman and Kendall L. Carder
Appl. Opt. 34(21) 4453-4471 (1995)