Research On Infrared Image Simulation Of Ship Target On The Sea

With the widely application of infrared imaging detection and simulation technology in the civil and military fields,the infrared radiation characteristics of target and background have become the key issue.Ships are very important equipment in the marine military field.Research on the infrared radiation characteristics of ships can provide a theoretical basis for maintaining own security in the marine context,according to the actual needs and application background of marine military,it has become a hot topic for navy and defense departments.In this paper,the infrared characteristics of ship targets are studied under the background of ocean waves and the transmission of infrared images in the atmosphere,the infrared simulation images of ships are generated by computer simulation.The specific content of this paper is as follows:1.Aiming at the geometric modeling of ship targets,according to the geometric structure characteristics of the ship target and the actual parameter ratio,this paper creates the ship target by the 3ds Max2017.For the geometric modeling of calm seas,the method of combining wave simulation equations and wave spectra is adopted.The Gerstner equations are used as the sea surface wave model and the JONSWAP spectrum to build a three-dimensional dynamic wave model.This method satisfies the characteristics of wave fluctuations in real time,and the established wave model has high fidelity and less calculation.2.Base on the established geometric model.According to the principles of heat transfer,the basic theory of infrared radiation and the calculation method of solar radiation angle,radiation analysis is carried out on ship targets and wave background,and the ship radiation model and wave infrared radiation model are established in the finally.Then the ship target is simulated by the finite element analysis software Ansys,and the theoretical temperature distribution map of the ship is achieved.Aiming at the problem of displaying infrared images with visible light images,the uniform quantization method is used to quantize the infrared radiation brightness value,it realizes the simulation of infrared images of zero-line-of-sight ships and ocean waves with dual bands,any time,any position,and any posture.Analyze and compare the simulated zero-line-of-sight ship infrared image with the Ansys simulated ship image,the experimental results show that the ship’s infrared image is similar.The infrared radiation model designed in this paper has high accuracy.3.This paper studies the image degradation of infrared radiation in atmospheric transmission.For atmospheric attenuation,the attenuation value calculated by the atmospheric transmission software is more accurate,which ensures the sufficient accuracy of the attenuation coefficient.Aiming at the atmospheric turbulence model,Firstly,a multi-vortex turbulence model based on an improved Gaussian-like point spread function is proposed.Infrared degraded images are simulated under different intensities of vortices,random positions,and random superposition.Secondly,a fuzzy image quality evaluation method based on cross neighboring pixels is presented to measure the degree of image degradation in the form of quantitative data.Finally,the effectiveness of the proposed methods is verified by simulation experiments.