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A Polarized Image Restoration Method Based on Circularly Polarized Light in Scattering Environment

A circularly polarized light and polarized image technology, applied in the field of polarization imaging detection, can solve the problems of difficult image restoration, easy loss of polarization characteristics, loss of polarization information, etc. the effect of clarity

Active Publication Date: 2020-11-27
TIANJIN UNIV
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Problems solved by technology

The polarization-maintaining ability of linearly polarized light in scattering media is relatively weak, and it is easier to lose its polarization characteristics and polarization information in stronger scattering media, so it is not easy to obtain a clearer restored image through polarization restoration methods

Method used

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  • A Polarized Image Restoration Method Based on Circularly Polarized Light in Scattering Environment
  • A Polarized Image Restoration Method Based on Circularly Polarized Light in Scattering Environment
  • A Polarized Image Restoration Method Based on Circularly Polarized Light in Scattering Environment

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Embodiment Construction

[0034] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 As shown, it is a polarization image restoration method based on circularly polarized light in a scattering environment of the present invention, and the specific implementation steps are as follows:

[0036] Step 1. Adjust the PSG system in front of the light source to generate circularly polarized light, and use the circularly polarized light as active illumination light;

[0037] Step 2. Adjust the angles of the polarizer and the wave plate in front of the camera to obtain the light intensity maps in the four states of the combination of the polarizer of 0°45°90° and the quarter wave plate of 0°45° respectively in the PSA. Calculate the Stokes vector of the image of the light intensity map;

[0038] Step 3. After normalizing the Stokes vector information of the calculated image, use the Stokes vector of the backgrou...

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Abstract

The invention discloses a polarized image restoration method based on circularly polarized light in a scattering environment. The method comprises: step (1), using circularly polarized light as activeillumination light; step (2), acquiring light intensity images in four states, and calculating a total light intensity Stokes vector of the light intensity images, wherein the total light intensity Stokes vector comprises part of object reflected light, and the other part of particles of the Stokes vector are scattered into the background light of a detector; step (3), calculating light intensityA and polarization degree Pscat of the backscattered light; and step (4), calculating a restored image by combining the circularly polarized light with a traditional physical model, and finally restoring the image L(x, y). Compared with the prior art, the technical solution of combining the circularly polarized light with a traditional polarized light model in a scattering medium is applied in the field of defogging polarized images in scattering medium environments for the first time, so that the method can overcome the defect of poor effect of the traditional method in a strong scattering environment and is wider in application scope; and the method is simple in operation and obvious in effect.

Description

technical field [0001] The invention belongs to the technical field of polarization imaging detection, in particular to a method for restoring polarization images in a scattering environment. Background technique [0002] Polarization information, as one of the basic physical information of light waves, can provide information about the measured object that other light wave information cannot provide. Polarization imaging technology is a new type of optical detection technology developed based on this idea. Especially in scattering environments, target detection and recognition based on polarization imaging technology has unique advantages and special applications that cannot be compared with other imaging methods. The foundation of this field is the research of Yoav Y. Schechner's group in the United States. They assume that the light entering the camera is divided into two parts, one part is the light actually reflected by the object, and the other part is scattered into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/001G06T5/006
Inventor 胡浩丰赵琳刘铁根王辉李校博
Owner TIANJIN UNIV
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