Scattering-scene depth reconstruction method based on polarization transient-imaging and equipment

Abstract

The invention discloses a scattering-scene depth reconstruction method based on polarization transient-imaging and equipment. The method is applied to the transient-imaging equipment used for a scattering scene. The equipment includes a laser light source, a depth camera located at the same horizontal plane as the laser light source, a polarizer disposed between the laser light source and a photographed target object, and a polarization analyzer disposed between the depth camera and the photographed target object. The method comprises: setting polarization starting directions of incident lightemitted by the laser light source, and setting a reference direction of the polarization analyzer; controlling the laser light source to emit the incident light, rotating the polarization analyzer, respectively photographing the photographed target object on multiple polarization analysis directions through the depth camera, and obtaining multiple sets of transient graph sequences by reconstruction; preprocessing the multiple sets of transient graph sequences to separate reflection components and scattering components in a current scene; obtaining time section graphs of image spatial-coordinate points from the reflection components of the transient graph sequences; and reconstructing scene depth according to peak value positions of the time section graphs.

Description

technical field [0001] The invention relates to the field of computational photography, in particular to a method for reconstructing the depth of a scattering scene based on polarization transient imaging and a transient imaging device for the scattering scene. Background technique [0002] In related technologies, methods for reconstructing the depth of scattered scenes are usually implemented using methods based on traditional artificial light sources. Among them, the methods based on traditional artificial light sources mainly include structured light and active polarized light methods: the method based on structured light is essentially binocular vision, and the corresponding points of the binocular vision need to be calibrated in advance, and need to be scanned to find the corresponding point. The specific method is to use a projector to project a flake of strong light to the scene, so that the camera can directly observe the surface of the scene. Since the correspondi...

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Problems solved by technology

However, this assumption is only valid under the condition of weak scattering and the incident light is polarized light, making the single scattering model no longer valid in the environment with slightly stronger scattering

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