利用偏振编码实现取零阈值的单通道击中与否运算

基于数学形态学的对偶法则以及数学形态学理论与线性位移不变系统理论间的关系,引入了偏振编码技术,提出使击中与否运算通过单通道取零阈值非相干光学相关器来实现的方案。该方案采用偏振编码,将图像的前景和背景都包含在一个编码图像中,从而使击中与否运算可以用一个腐蚀算子完成(即通过单通道实现),大大简化了实验装置,节约了空间,降低了对光路调节的要求。同时,通过取零阈值,消除了由于入射光强分布不均匀及CCD光电响应的非完全线性所导致的对输出图像取阈值时出现的误差。最后,还对该方案进行了实验验证,结果表明这是一种方便、准确、有效的图像处理方法。

One-Channel Hit-Miss Transform with Zero Threshold by Polarization Encoding

Based) on the duality theory of mathematical morphology and the relation between the mathematical morphological theory and linear shift invariant system,polarization-encoding method is introduced and a scheme is proposed to realize hit-miss transform by one-channel and zero-threshold value incoherent optical correlator.With polarization encoding,the scheme combines the foreground and background of an image into an encoded image,so the hit-miss transform can be completed by an erosion operator,one-channel realization.The experimental setup is simplified greatly,more compact,and the demand for adjusting light path is reduced.Because of the zero threshold,the error for the threshold of output image resulted from the ununiformity of optical intensity distribution and the imperfect linearity of CCD optoelectronic response is avoided.The experimental result proves the convenience,accuracy and validity of the scheme.