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Underwater video camera system based on polarization identification and method thereof

An underwater camera and polarization technology is applied in the field of optical instruments to achieve the effect of improving contrast and clarity, and improving the efficiency of target detection and recognition.

Inactive Publication Date: 2011-07-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the above polarization imaging methods have certain requirements on the clarity of the water body.

Method used

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  • Underwater video camera system based on polarization identification and method thereof
  • Underwater video camera system based on polarization identification and method thereof
  • Underwater video camera system based on polarization identification and method thereof

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Embodiment Construction

[0020] combined with Figure 1-4 , to further describe the present invention:

[0021] A technical scheme of an underwater camera system based on polarization identification is: including an underwater light source, a polarization modulation part, and an image acquisition and processing part; the underwater light source includes a semiconductor laser 3, an optical filter 4, and a polarizer 5 , polarization rotator 6 and beam expander 7, the polarization modulation part includes analyzer 10, stepper motor 12, stepper motor controller 13 and infrared detector 9; image acquisition and processing part includes high frequency CCD camera 11, image Acquisition system 14 and computer 15.

[0022] Wherein, the polarization rotator 6 is a twisted nematic liquid crystal rotating polarizer, through which the polarization rotation angle can be precisely controlled, and the polarization direction of the linearly polarized light beam can be quickly rotated. The outer ring 1 of the analyzer...

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Abstract

The invention relates to the technical field of optical instruments, in particular to an underwater video camera system based on polarization identification and a method thereof. The technical scheme is that the underwater video camera system comprises an underwater light source, a polarization modulation part and an image acquisition and processing part, wherein the underwater light source comprises a semiconductor laser, an optical filter, a polarizer, a polarization rotator and a beam expander; the polarization modulation part comprises an analyzer, a stepper motor, a stepper motor controller and an infrared detector; and the image acquisition and processing part comprises a high-frequency CCD (Charge Coupled Device) video camera, an image acquisition system and a computer. The underwater video camera system has the benefits that with the adoption of the underwater camera system and the method, the contrast degree and the definition of target imaging as well as the target detectionand the identification efficiency can be effectively improved; the polarization imaging can utilize the differences of different target back polarizations to eliminate the interference of background light; and as a means for identifying the target from messy background is provided, the method has remarkable advantage as compared with the commoner method for imaging and identifying the target by using light intensity.

Description

1. Technical field: [0001] The invention relates to the technical field of optical instruments, in particular to an underwater camera system and method based on polarization identification. 2. Background technology: [0002] The underwater camera system is an optical observation tool used to detect underwater objects and carry out TV display on the water. It provides high-resolution video images for real-time observation of underwater targets. It has become one of the necessary equipment for underwater operations. Especially in the underwater space where people cannot and are difficult to observe directly. It has been widely used in various underwater operations including military purposes, including observation of weapon testing, ship repair, exploration of mines, torpedoes and inspection of mines; observation and control of submarine engineering operations and underwater construction processes, Reconnaissance and selection of underwater construction sites, equipment inst...

Claims

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Application Information

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IPC IPC(8): G03B15/05G02B27/28G02F1/1335H04N5/225
Inventor 李代林裴红艳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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