Proceedings PaperRelation between MTF and natural light radiance field in the sea or atmosphere
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The modulation transfer function (MTF) of sea water is a very important parameter for ocean optics, lidar, laser beam transmission and image transmission in the sea. V.A.Del Grosso1,2 , L.E.Metens and published measured.results of MTF in the sea in 1975,1977,and 1978.In general, the measurement MTF method is measuring laser beam transmission by means of setting up a blue—green laser transmitter and reciving system in the sea. This kind of method is very difficult to measure MTF in various different depths and sea area, because the moved of transmitter and recieving system from a sea arae to another sea area is not convenient and realiation. In this paper, we suggest to get MTF in the sea from natural radiance field by means of the relation between MTF and natural radiance field, we give the relation between MTF and natural radiance field by information transmission theory in section 2, the point spread function(PSF) and spatial angular frequricy spectrum in the sea in section 3, the inherent optical properties derived from MTF in section 4.