Abstract
This paper reports the results of MTF (Modulation Transfer Function) measurement and simulation of petterns in fog. Fog was produced in a fog chamber. First, temporal density change of fog and particle size distribution of water in fog, were investigated. To evaluate optical properties, MTF properties using grating patterns, was measured. One grating pattern was displayed on a white diffuse flat panel illuminated by installed fluorescent lamps, and another was displayed on a panel illuminated by other lamps from outside. Estimating the MTF properties of assumed fogs from the MTF properties obtained, simulation of patterns passed through the fogs, were carried out by a computer graphic device, and those pattern perceptibility were compared. As a result, the detailed shape of the pattern should depend on imaging aspects of transmitting light with slighttly scattering. Moreover, perceptibility of signal pattern under the fog density indicated by visibility distance: 1500m, was discussed.
