動(dòng)態(tài)海面仿真和海天背景輻射特性研究
[Abstract]:The optical radiation and scattering characteristics of dynamic sea surface are studied in this paper. The atmospheric transmittance, solar spectral radiance and solar spectral radiance of visible, near-infrared, medium-wave and far-infrared bands, at different altitudes, incident zenith angle and time were calculated by Modtran. Sky spectral radiance and oblique spectral radiance. Two modeling methods, Gerstner geometric model and wave spectrum model based on FFT, are used to generate sea surface mesh. The sea surface height field was generated by using Phillips wave spectrum model. Combined with the Cox-Munk slope model, the refractive index model of seawater and the pretreatment data of Modtran, the optical images of sea surface under different sea conditions were simulated and calculated. Based on Fourier optics, the system transfer functions of CCD and infrared detectors with different wavelengths and apertures are studied. The imaging of sea surface optical system in different bands is simulated. The effect of frequency filtering on image quality is analyzed by digital image processing. The function of histogram processing and filter in image enhancement is discussed. Based on the outliers detected by the Hough change fast link edge detection operator, the application of sea antenna detection to the image obtained by the photoelectric imaging simulation system of the dynamic sea surface is presented in this paper.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:P733.3;TP391.41
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