Polarization extinction-based imaging method

Abstract

The invention discloses a polarization extinction-based imaging method. According to the imaging method, a polarizing film vertical to an optical axis of a camera is arranged in front of a camera lens; the polarizing film can uniformly rotate in front of the camera lens; when the polarizing film uniformly rotates, a camera carries out continuous shooting and obtains polarized images at different polarization angles; and a first frame image shot by the camera is taken as a reference image, and extinction state discrimination is continuously carried out on the image which is shot later by the camera each time and the reference image to obtain a final extinction image, namely the extinction image obtained by rotating the polarizing film at 180 degrees. The polarization extinction-based imaging method has the significant advantages that the image contrast is high and the details of the target are distinct; observation and detection of a target object through human eyes or other observation equipment are facilitated; the principle is simple; and the effect is obvious.

Description

technical field [0001] The invention belongs to the field of imaging technology, in particular to an imaging method based on polarization extinction. Background technique [0002] Due to the strong reflection of the target object or the mirror reflection of the object surface, the captured image will appear bright white, which strongly interferes with the observation or detection of the target by human eyes or other observation equipment. Therefore, in this case, some front-end equipment is required to eliminate strong light without affecting the detection information of the target, so as to facilitate the observation or detection of the target by human eyes or other observation equipment. In response to this situation, people have designed and implemented various systems for eliminating glare. The common system is to add an attenuation sheet between the observation equipment and the target to reduce the light intensity. However, the overall light intensity of the image obt...

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Problems solved by technology

Document 3 (CN102998667A) discloses a solar flare stripping method on wave water surface based on polarization remote sensing detection, using a polarization imaging detector based on a liquid crystal phase variable retarder to perform polarization imaging detection on wave water surface to obtain a polarization intensity image, and then calculate The degree of polarization image and the polarization angle image are calculated based on time series analysis and image fusion technology to separate the target object under the background of the sun flare. Although this method has a significant stripping effect on the sun flare, the system cost is high and the equipment is expensive. And it can only be used in the field of solar flare stripping in polarization remote sensing detection, which has certain limitations

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