Real-time acquisition device and method for underwater differential polarization image

Abstract

The invention provides a real-time acquisition device for an underwater differential polarization image, and relates to the technical field of underwater imaging equipment. The real-time acquisition device comprises an imaging unit, wherein a light source is arranged above the imaging unit; a linear polarizer is arranged in front of the light source; an electric control polarization unit is arranged in front of the imaging unit; the imaging unit comprises an image sensor, a microcontroller, a synchronous circuit and an image preprocessing module; the microcontroller collects signals output by the image sensor; and the synchronous circuit is connected with the microcontroller and an electric control polarizer, so that the polarization state of the electric control polarization unit changes along with the imaging process; the image preprocessing module receives the shot pictures in different polarization states and processes the pictures into polarization degree images. The electronic control polarization unit is used, an all-solid-state imaging system can be achieved, the polarization state does not need to be changed in a mechanical rotation mode, and compared with the mode that the polarization state is changed through mechanical rotation, the structure is simpler, and reliability is higher.

Description

technical field [0001] The present invention relates to the technical field of underwater imaging equipment, in particular to a real-time acquisition device and method for underwater differential polarization images. Background technique [0002] At present, there are two main technical paths to alleviate the backscattering of water in the imaging process from the optical point of view, namely laser range-gated imaging and polarization imaging. Laser range-gated imaging uses a high-power narrow-pulse laser as a light source, uses an ICCD (enhanced charge-coupled device) as an image sensor, and uses a laser lighting system to illuminate the target area, and the gated camera separates the scattered light at different distances in time and the target reflected light, so that the radiation pulse reflected by the target reaches the camera and forms an image just within the camera gate time. The laser has a long distance from the gating imaging system, and the backscattering elim...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a real-time acquisition device and method for underwater differential polarization images, which solves the problem of severe loss of polarization filters in existing underwater differential polarization imaging devices

Images