论文部分内容阅读
本文提出一种在光学相关识别中改善相关峰锐度的方法.在制作匹配滤波器时利用记录介质的非线性突出输入图像的边缘,从而实现了相关峰的锐化.文中详述了该方法的实现过程及理论基础,并给出了光学实验和计算机模拟实验的结果.
利用记录介质的非线性实现相关峰的锐化
【摘 要】
：
本文提出一种在光学相关识别中改善相关峰锐度的方法.在制作匹配滤波器时利用记录介质的非线性突出输入图像的边缘,从而实现了相关峰的锐化.文中详述了该方法的实现过程及理论基础,并给出了光学实验和计算机模拟实验的结果.
【机 构】
：
四川大学物理系,成都610064西南技术物理研究所,成都610015
【出 处】
：
光学学报
【发表日期】
：
1993年13期
其他文献
本文报道了一种采用自泵浦相位共轭镜作为取阈,反馈器件的光学关联存储系统,该系统采用He-Ne激光作为光源,可实现实时处理.当输入信息仅为存储信息的25%时,得到了正确的输出.
多脉冲位置调制(MPPM)是基于脉冲位置调制(PPM)的改进形式,已成为卫星光通信中高效调制方式。针对存在背景辐射、大气湍流、热噪声的卫星光通信信道,研究了远场激光脉冲展宽机理和时钟抖动对系统的影响。提出基于格雷码的MPPM联合编码调制方式减小时钟抖动和码间干扰影响,应用星座图设计了基于格雷码(7,2)MPPM映射方法,在相同传输带宽下(7,2)MPPM的传输效率超过16PPM的2倍。分析泊松信道下基于格雷编码的(7,2)MPPM字符错误概率和比特错误概率(BEP)。结果表明,采用格雷编码MPPM可以有效
Application of Brillouin Optical Correlation Domain Analysis for Crack Identification in Concrete St
We demonstrate two ultra-stable laser systems at 1064 nm by independently stabilizing two 10-cm-long Fabry–Pérot cavities. The reference cavities are on a cubic spacer, which is rigidly mounted for both low sensitivity to environmental vibration and abili
A spatial optical switch phenomenon caused by the induced focusing of a weak probe beam occurring in self-defocusing nonlinear media is discussed theoretically. A weak beam is induced to focus when it copropagates with an intense pump beam under the condi
Experimental investigation of photoluminescence spectra of Yb^(3 ) sensitized Er^(3 )-doped glass sa
Fabrication technology of the Yb^(3 ):Er^(3 ) co-doped glass samples is introduced. Photoluminescence (PL) characteristics of a single sample were experimentally investigated. The PL peak intensities of two samples in series were measured and discussed. T