Infrared detecting device and method for target recognition in sea surface sun bright band

Abstract

The invention discloses an infrared detecting device and method for target recognition in a sea surface sun bright band. According to the infrared detecting device, the lenses of two middle infrared cameras form an angle; an infrared polarizer is arranged in front of the lens of a middle infrared camera; a wire gating polarization device is arranged at the light path intersection in front of the lenses of two middle infrared cameras; a diaphragm is arranged on the light path in front of and the wire gating polarization device; a germanium sealing window is arranged in front of the diaphragm; the germanium sealing window and a temperature control hood form a sealed temperature control cavity; and the middle infrared cameras, the infrared polarizer, the wire gating polarization device and the diaphragm are arranged in the temperature control cavity. When detection is carried out, the system of the infrared detecting device is calibrated; the image of the sea surface sun bright band is collected; and target recognition is finally realized after image processing. According to the invention, the image gray scale difference between the target and the surrounding sea area is improved; equal gray-scale massive sea area appearing in the bright band sea area is reduced; and the target recognition ability in the sea surface sun bright band is improved.

Description

technical field [0001] The invention belongs to the technical field of sea surface target recognition, and in particular relates to an infrared detection device and method for target recognition in the sun bright band on the sea surface. Background technique [0002] On a sunny day, when the sea surface optical imaging detection equipment faces the sun to observe the sea surface target, the solar radiation will be reflected by the sea surface to the detection equipment. The detection image shows a dazzling and flickering band-shaped area, which is called the sun's bright band on the sea surface. The bright band of the sun on the sea surface seriously affects the detection of targets in the bright band sea area by optical imaging detection equipment, resulting in a great reduction in its target recognition ability, such as figure 1 with figure 2 As shown, the sea surface targets include islands, rocky reefs and various sea surface floating objects near the sea level. [0...

AI Technical Summary

Problems solved by technology

[0007] (3) The bright band of the sun on the sea surface causes the infrared camera of the infrared imaging device to saturate

[0009] To sum up, there are currently no research reports on accurate identification of targets in the bright sun belt in the open literature. Therefore, the development of a detection device that can eliminate the interference of strong reflected solar radiation on the sea surface is the key to realizing the target detection in the bright sun belt on the sea surface. The key to target recognition

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