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Underwater polarization imaging method for simulating vision polarization antagonism sensing of mantis shrimps

A polarization imaging, mantis shrimp technology, applied in the field of underwater imaging, can solve the problems of reducing the accuracy of imaging data, noise, polarization image measurement error, etc., and achieve the effects of reducing impact, improving accuracy, and enhancing amplitude

Active Publication Date: 2014-07-02
HOHAI UNIV
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Problems solved by technology

However, due to the influence of factors such as different light transmittance of polarizing devices in different bands and non-uniformity of light transmission, there are measurement errors and noises in the polarization image, which reduces the accuracy of the imaging data, and finally leads to the calculation of the traditional Stokes polarization. There are large errors and noise in the parameter image

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  • Underwater polarization imaging method for simulating vision polarization antagonism sensing of mantis shrimps
  • Underwater polarization imaging method for simulating vision polarization antagonism sensing of mantis shrimps
  • Underwater polarization imaging method for simulating vision polarization antagonism sensing of mantis shrimps

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Embodiment Construction

[0028] Below in conjunction with the accompanying drawings, a kind of underwater polarization imaging method imitating mantis shrimp visual polarization antagonism perception proposed by the present invention is described in detail:

[0029] figure 1 Flowchart for the implementation of the underwater polarization imaging method imitating the perception mechanism of mantis shrimp visual polarization antagonism, the implementation process is antagonized

[0030] It mainly includes the following steps:

[0031] Step A, collect six polarization signals through imitating mantis shrimp visual polarization opposition perception mechanism, which are linearly polarized light intensities I(30°), I(120°) in four directions of 30°, 120°, 75°, and 165° respectively. ), I(75°), I(165°) and left-handed and right-handed circularly polarized light intensity I l , I r ;

[0032] Step B, judging whether six polarization signals are collected, if so, execute step E, otherwise execute step C; ...

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Abstract

The invention provides an underwater polarization imaging method for simulating vision polarization antagonism sensing of mantis shrimps. According to the method, mantis shrimp compound eyes are simulated, antagonism to polarization signals are collected, a polarization antagonism model is established, a tuning factor of an antagonism model is designed, polarization sensitivity in all directions is adjusted and controlled, so that polarization antagonism parameters are obtained, a polarization degree parameter and a synthetic light intensity parameter are further obtained, and finally conversion from a light intensity matrix to pixel grayscale on an imaging surface through a photoelectric conversion model is completed, so that all parameter images are obtained. By means of the method, polarization response signal amplitude is enhanced, influences caused by uneven illumination are reduced, the contrast ratio of a target in the polarization parameter image and a background is increased, and underwater target detection accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of underwater imaging, in particular to an underwater polarization imaging method imitating mantis shrimp visual polarization antagonism perception. Background technique [0002] In the underwater environment, due to the strong absorption and scattering of light by the water body, the light energy attenuates rapidly in the water. At a depth of 40 meters underwater, only yellow-green light exists in natural light. Imaging polarization measurement technology converts the information from three-dimensional (light intensity , spectrum, and space) to seven dimensions (light intensity, spectrum, space, polarization degree, polarization azimuth, and polarization ellipticity), and underwater polarization imaging technology can simultaneously obtain intuitive grayscale images of each polarization parameter and each observation Detailed polarization data information for a point. However, due to the influence of facto...

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Application Information

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IPC IPC(8): G01J4/00G01J1/00G06T7/00
Inventor 沈洁王慧斌陈晶晶李臣明张丽丽
Owner HOHAI UNIV
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