Detection device and detection method for target image of large non-uniform light field

A technology of target image and detection device, applied in the field of underwater vision, can solve the problems of single lighting mode, limited scope of application, limitation, etc., and achieve the effect of wide detection range
CN104635278AActive Publication Date: 2015-05-20OCEAN UNIV OF CHINA
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
OCEAN UNIV OF CHINA
Publication Date
2015-05-20

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Abstract

The invention discloses a detection device and a detection method for a target image of a large non-uniform light field. The detection device comprises an upper computer, an image acquisition device and two groups of non-uniform illumination arrays, wherein the image acquisition device comprises a frame pole on which cameras are arranged; each group of non-uniform illumination array comprises a frame role on which light sources are arranged; each light source comprises a casing provided with a metal halide light source; a lens and an optical window are arranged at the front end of each casing. The detection method comprises the following steps: obtaining the maximum observation distance according to the transparency of a water body; calculating the minimum size of the optical axle distance; placing and illuminating the device; acquiring the image. According to the detection device and the detection method disclosed by the invention, the illumination of the 3m*4m wide-range non-uniform light field can be realized at the distance of 15m in the space; the defects that a single bundled light source is narrow in observation range and has a blind zone at a short range are overcome; the working distance extends to the length of 1.9 times of the visibility while the observation range of field depth is widened.
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Description

technical field

[0001] The invention relates to an underwater large-scale non-uniform large light field target image detection device and method, belonging to the technical field of underwater vision. Background technique

[0002] Light propagates in water, and the optical information received by the receiver is mainly composed of three parts: reflected from the target and passed through the water medium. Imaging beam after absorption and scattering loss; backscattered light that affects image contrast due to water medium scattering between the light source and target; forward scattering that has a small angle of water medium scattering between the target and receiver and directly affects the resolution of target details Light. Compared with atmospheric imaging technology, the research focus of underwater imaging technology is to reduce the impact of strong scattering effect and fast absorption power attenuation characteristics of water medium on underwater communication, i...

Claims

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