The invention provides a three-dimensional composite imaging method of a hyperspectral
laser, a
system and an unmanned self-propulsion device. The method includes steps of scanning an
underwater suspicious zone through hyperspectrum so as to determine a detecting target in a suspicious zone; scanning the detecting target through a
laser, and acquiring a backward scattering
signal; confirming the distance information with the detecting target through the backward scattering
signal; preforming interference shielding treatment on intensity information, spectrum information, and polarization information of the backward scattering
signal, and acquiring the position information of the detecting target after analyzing the distance information with the detecting target; according to the intensityinformation, spectrum information, and polarization information of the backward scattering signal after removing interference, generating a three-dimensional image of the detecting object. Through combination of active
laser scanning and hyperspectral
passive imaging, the polarization information and spectral information of the detecting target are extracted; through
information fusion of the both, speciality inversion of the small
underwater target is completed, thereby realizing the accurate identification and high-precision location of the detecting target under the water.