Polarization three-dimensional imaging method capable of representing absolute depth of target

The invention discloses a polarization three-dimensional imaging method capable of representing the absolute depth of a target. The method comprises the following steps: obtaining polarization images of the target at different polarization angles; obtaining the polarization degree of each pixel point on the surface of the target object in the polarization image; acquiring azimuth angle initial values and incident angle initial values at different pixel points on the surface of the target; correcting the initial value of the azimuth angle and the initial value of the incident angle; constructing a normal vector for each pixel point on the surface of the target by using the corrected azimuth angle and incidence angle; reconstructing a three-dimensional contour of the target by using normal vector integration to obtain a surface function of the target; and the absolute depth information of the target is obtained by combining the calibration of the camera and the surface function. According to the method, the tar