High-speed dim target large dynamic range detection method under complex earth background

Abstract

The invention discloses a high-speed dim target large dynamic range detection method under a complex earth background. A space-based infrared detection system is used for detecting a high-maneuverability target flying at a high speed. The method comprises the following steps: firstly, establishing a multi-parameter association optimization model, and solving a specific spectral feature target through a spectrum section and a resolution ratio to realize background suppression; secondly, two or more sets of system detection parameters are set, one set of system detection parameters obtains earth background information and small-radiation-intensity target information through long-integration-time, high-gain and high-sensitivity parameters, and under the parameters, the earth background does not exceed N% of the dynamic range of analog signals of a detector (N is larger than or equal to 25 and smaller than or equal to 90); the second group and above parameters obtain high radiation intensity target information through short integration time, and targets in the parameters are unsaturated. And then, carrying out dynamic range fusion lap joint to realize the improvement of the target detection range. According to the method, the detection dynamic range can be greatly expanded, and the detection capability of a high-speed dark and weak target under a complex earth background is enhanced.

Description

technical field [0001] The invention relates to a large dynamic range detection method for high-speed dim targets under complex earth backgrounds. The method mainly realizes background suppression through multi-parameter joint optimization of spectral segments, and performs overlapping of dynamic ranges through multiple exposures to realize the detection of high-speed aircraft. Large dynamic range detection. Background technique [0002] Large dynamic range remote sensing imaging can obtain rich target levels and detailed information, which is conducive to the effective acquisition and identification of detection target information. The change range is higher than 120dB, and the constant change of the target puts forward higher requirements on the dynamic range of the space-based imaging system. [0003] At present, the commonly used methods for obtaining large dynamic range are mainly based on two methods: sensor optimization and camera working mode optimization. Sensor o...

AI Technical Summary

Problems solved by technology

As mentioned in the background technology, the existing large dynamic range detection method has the disadvantages of complex structure, cumbersome operation, high hardware cost, large data volume, and complicated processing flow.

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