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Imaging method based on polarized light extinction

An imaging method and polarized light technology, which is applied in optical and photographic filters, instruments, etc., can solve the problems of weakened contrast, reduced image light intensity, and incomplete resolution of details, and achieve high-definition effects

Inactive Publication Date: 2013-10-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the overall light intensity of the image obtained in this way becomes smaller, the contrast is also weakened, and the details on the target object cannot be fully resolved

Method used

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  • Imaging method based on polarized light extinction
  • Imaging method based on polarized light extinction
  • Imaging method based on polarized light extinction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1. An imaging method based on polarized light extinction, comprising the following steps:

[0015] Step 1: Control the angle between the object 1 to be photographed and the line connecting the light source 2 and the camera lens 3 to be twice the Brewster's angle, the size of the Brewster's angle is determined by the object and the refractive index of the medium where the object is located;

[0016] Step 2: arrange a polarizer 4 perpendicular to the optical axis of the camera in front of the camera lens 3, rotate the polarizer 4, select m different polarization angles, and shoot m polarization images with different polarization angles, m≥2;

[0017] Step 3: Use a pixel point window with the same size to divide each polarization image described in step 2 into k pixel point windows, k≥2, and form k groups in the same area of ​​each polarization image, each group m A corresponding pixel window with the same position;

[0018] Step 4: In each group of m correspon...

Embodiment 2

[0020] Embodiment two, step one, step two are identical with embodiment one, and the image fusion formula of step three, step four and step five is:

[0021] D ( i , j ) = D θ 1 ( i , j ) if ( sum ( I θ 1 ( i , j ...

Embodiment 3

[0029] Embodiment 3, Step 1 to Step 5 are the same as Embodiment 1. The image is a color image. When performing image fusion on a color image according to formula (1), each pixel needs to be divided into R, G, and B three-channel pixels, respectively Compare the gray values ​​of the corresponding pixels R, G, and B, and then combine the R, G, and B obtained through the fusion formula into color pixels.

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Abstract

The invention discloses an imaging method based on polarized light extinction to solve the problems of low imaging definition and lacking of instantaneity when a target object is photographed under saturated light in the prior art. The method includes the steps of controlling an included angle between the connecting line from the object to the paragraphed to a light source and the connecting line from the object to be paragraphed to a camera to be twice as large as the Brewster angle, arranging a polarizing film perpendicular to an optical axis of the camera in front of a lens of the camera, paragraphing a plurality of polarization images with different polarization angles through the rotation of the polarizing film, designating a pixel point window for each polarization image, comparing a grey value of each pixel point in each pixel point window with a threshold value, and selecting pixel points in the pixel point window with the minimum number of pixel points of which the grey values are larger than the threshold value to conduct fusion imaging.

Description

technical field [0001] The invention relates to an imaging method based on polarized light extinction. Background technique [0002] Because the light intensity is too strong or the specular reflection of the object causes the image to be saturated, the captured image will become a dazzling white, and the details on the target object cannot be distinguished. The existing method generally adds an attenuation film between the camera lens and the object to reduce the light intensity. However, the overall light intensity of the image obtained in this way becomes smaller, the contrast is also weakened, and the details on the target object cannot be fully resolved. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for imaging a target object through polarized light extinction under saturated light, thereby improving the imaging definition of the target object. [0004] In order to solve the above-mentioned tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B11/00G03B15/00
Inventor 顾国华虞文俊钱惟贤季尔优陈锋何伟基路东明于雪莲张闻文王坤张立广冯惟一
Owner NANJING UNIV OF SCI & TECH
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