The invention discloses a surface
oil film display method suitable for an
underwater object. The method mainly comprises the following steps: firstly, preparing a mixed turbid liquid suitable for an
underwater environment; then, in a water-free environment, uniformly brushing the mixed turbid liquid on the surface of an object, so that a layer of surface
oil film with uniform thickness is formed on the surface of the object; placing in an
underwater test environment, continuously recording an oil flow map of the object surface by using a camera, and obtaining a
digital image sequence of the oil flow map of the object surface;
processing the preprocessed oil flow map
image sequence by using a multi-stage grid iteration cross-
correlation method to obtain an instantaneous oil flow
vector field sequence; and finally, generating a flow map of the object surface according to the instantaneous oil flow
vector field sequence. The method can be suitable for some underwater tests, and the application scene is expanded; the
test efficiency is greatly improved, and personal errors caused by excessive manual participation are reduced. In addition, the display and
qualitative analysis of the dynamic evolution process of the oil flow map can be realized.