Fish school video signal acquisition assembly, method, device and system and storage medium

The invention discloses a fish school video signal acquisition component, method, device and system and a storage medium, and the fish school video signal acquisition component comprises a light source component which projects combined light to a target fish school; the polarization analyzer is provided with a light inlet side, a parallel light outlet side and an orthogonal light outlet side; the light incident side faces the combined light beam at the target fish school; the polarization analyzer is used for separating the combined light entering the light inlet side into parallel polarized light and orthogonal polarized light, projecting the parallel polarized light to the parallel light outlet side and projecting the orthogonal polarized light to the orthogonal light outlet side; the parallel camera device is arranged towards the parallel light emitting side and collects the parallel polarized light so as to form parallel polarized fish school video signals; and the orthogonal camera device is arranged tow