CAJ | 학술논문

基于距离选通的激光主动成像系统在大气条件下对运动目标成像时，为了在更大范围内搜索跟踪目标，距离选通初始门宽通常在微秒量级，进而引起后向散射，严重影响了系统对目标的识别与提取。文中首先分析了基于距离选通的激光主动成像系统，在此基础上引入距离信息实时跟踪运动目标，研究了不同选通门宽引起的后向散射对图像质量的影响，提出了一种基于Sobel 算子和 GAC 模型的目标轮廓提取算法，将 Sobel 边缘检测的结果引入水平集边界停止函数，为水平集的曲线演化提供参考依据。实验结果表明，提出的水平集算法能够克服严重后向散射干扰影响提取目标轮廓，目标提取精度在0.9以上，高于 GAC、LIF、LBF 等经典水平集算法。
기우거리선통적격광주동성상계통재대기조건하대운동목표성상시，위료재경대범위내수색근종목표，거리선통초시문관통상재미초량급，진이인기후향산사，엄중영향료계통대목표적식별여제취。문중수선분석료기우거리선통적격광주동성상계통，재차기출상인입거리신식실시근종운동목표，연구료불동선통문관인기적후향산사대도상질량적영향，제출료일충기우Sobel 산자화 GAC 모형적목표륜곽제취산법，장 Sobel 변연검측적결과인입수평집변계정지함수，위수평집적곡선연화제공삼고의거。실험결과표명，제출적수평집산법능구극복엄중후향산사간우영향제취목표륜곽，목표제취정도재0.9이상，고우 GAC、LIF、LBF 등경전수평집산법。
When the range -gated laser active imaging system is imaging the moving targets under atmospheric condi-tions,the initial gate width is usually in the microsecond magnitude in order to search and track the target in a wider range,which causes much backscatter and seriously affecting the recognition and extraction of the target.The range -gated laser active imaging system was analyzed firstly,then real -time tracking of moving targets from the motion in-formation was introduced.The effect of the backscatter caused by different gate widths on image quality was studied, and a kind of object contour extraction algorithm based on Sobel operator and GAC model was put forward.The result of Sobel edge detection is introduced to level set boundary stop function,which provides a reference for the curve evo-lution of level set.Experimental results show that the level set algorithm can overcome the effect of serious backscatter on object contour extraction,and target extraction accuracy is above 0.9 and higher than the GAC,LIF and LBF clas-sic level set algorithm.