Simulation Of High-resolution Infrared Remote Sensing Image Of Ship Targets In Ocean Background

The high-resolution infrared optical remote sensing satellite image can obtain the infrared physical characteristics,morphological characteristics and real-time working condition information of ship targets all day and all weather.It is of great significance to the dynamic real-time monitoring and early symptom recognition of marine ship targets,and is conducive to the real-time and accurate grasp of the Marine Battlefield status information.However,at present,there is still a lack of meter / sub meter space-based infrared detection data,and there is insufficient understanding of ship target / background characteristics in high-resolution infrared remote sensing images,which can not fully support the demonstration of infrared load indicators and the research on ship target detection and recognition algorithms.Based on the transmission mechanism of infrared radiation characteristics of high-resolution optical remote sensing,this paper studies the simulation methods of infrared images of ship targets and sea background,and analyzes the application efficiency.The main research work is as follows:(1)Research on simulation method of infrared radiation characteristics of high-resolution ship targets.The precise geometric model of the ship target is established,and the mesh generation method of the three-dimensional model is studied.Combined with the solar irradiation model and the steady-state heat balance equation of the target,the effects of the internal energy of the ship target,the energy dissipated outward in the form of radiation and the convection heat generated with the environment on the infrared radiation characteristics of the ship target are comprehensively analyzed,and the simulation of the temperature distribution of the ship target under different imaging conditions and different working conditions is realized,On this basis,a calculation model of ship target radiation characteristics is proposed based on Monte Carlo ray tracing method.(2)Research on simulation method of infrared radiation characteristics of high-resolution sea background.Combined with the precise distribution of sea surface height field under different sea conditions obtained from the wave spectrum information,starting from the radiation transmission mechanism of sea surface micro elements,and comprehensively considering the effects of sea surface self-radiation,solar radiation and environmental radiation,a model of sea surface infrared emission and reflection characteristics is established,At the same time,taking full account of the changes in the sea surface height field and sea temperature caused by the self-work on the sea water and the discharge of the tail cooling water during the navigation of the ship target,the Kelvin wake and thermal wake models of the moving ship target are established,and then the simulation and analysis method of the coupling characteristics between the ship target and the sea background is proposed to realize the high-resolution infrared characteristic modeling of the marine scene.(3)Research on simulation method of high-resolution infrared remote sensing imaging link.Based on the full link of infrared remote sensing imaging,aiming at the imaging mechanism of the new generation of high-resolution and high dynamic range infrared detectors,the atmospheric transmission(path radiation,turbulence,aerosol),platform flutter,optical system imaging,signal conversion(noise,non-uniformity,blind element flicker),quantification and other link elements are modeled,and the main impact of each imaging link on the imaging quality is analyzed,A high-resolution infrared remote sensing imaging link simulation method is proposed.(4)Simulation results and analysis of high-resolution infrared ship remote sensing images.On the basis of the existing evaluation methods for the detection and interpretation efficiency of infrared remote sensing images,taking full account of the target characteristics,background characteristics,imaging characteristics and human eye characteristics,the noise equivalent contrast(NEC)is introduced,and an improved evaluation method based on Johnson criterion and Minimum Resolvable Contrast(MRC)is proposed to comprehensively analyze the interpretation and target detection characteristics of high-resolution infrared ship remote sensing images.Finally,the proposed simulation method is used to obtain the high-resolution infrared images of sea ships under different resolutions and weather conditions,and the detection efficiency of high-resolution infrared remote sensing images of sea ships is analyzed.