Affiliation:
1. Sun Yat-Sen University
2. Southern Marine Science and Engineering Guangdong Laboratory
Abstract
Object image quality degrades in fog due to optical scattering and attenuation. We present some unique features for optical imaging of an extended object in dense fog. As the optical imaging is mainly arising from ballistic photons in fog, the scattering photons generate a background that reduces the contrast of the optical image. Self-masking effect is observed for an extended emanating object such that the image recognizability deteriorates with the order that the enclosed structure disappears first and outside boundaries persist longer as the visibility is reduced. The Monte Carlo simulation is carried out for a practical optical imaging system in a fog chamber with a point source, sparsely distributed sources, and with an extended emanating object, and the image process presents some salient features. The experiment conducted in the fog chamber demonstrates good agreement between the numerical simulation and experimental results.
Funder
National Natural Science Foundation of China
Guangdong Major Project of Basic and Applied Basic Research
Basic and Applied Basic Research Foundation of Guangdong Province
Guangzhou Basic and Applied Basic Research Foundation
Cited by
1 articles.
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