【作者】 冯升同； 王大勇； 江竹青； 陶世荃； 刘汉承；

【Author】 FENG Shengtong, WANG Dayong, JIANG Zhuqing, TAO Shiquan, LIU Hancheng (College of Applied Sciences, Beijing University of Technology, Beijing 100022, China)

【机构】 北京工业大学应用数理学院；

【摘要】 本文提出使用综合判别函数作为输入在光折变晶体中记录匹配滤波器,即利用不同旋转角度的参考图像集训练出该图像的综合判别函数,再通过角度复用存储在晶体中,从而构建出一个体全息旋转不变光学相关器。同时,设想在光路中直接引入光学子波滤波器,克服不同的图像通过的光能量差异较大所产生的问题。计算机仿真和实验结果表明上述方法可以较好地完成旋转不变性识别。更多还原

【Abstract】 In this paper, it is proposed to record the matched filter in the photorefractive crystal by using the synthetic discriminant function(SDF) as the input. The SDF is generated by training a set of rotated reference images. Multiple matched filters are stored by angle-multiplexing in the same volume. Due to the large difference among the optical throughouts of the images, an optical wavelet transform filter is directly introduced into the experimental setup. Computer simulation and experimental results demonstrate that it is possible to achieve the rotation-invariance pattern recognition with the proposed method.更多还原