Binary zone-plate array for a parallel joint transform correlator applied to face recognition.
Binary zone-plate array for a parallel joint transform correlator applied to face recognition.
复制标题
用于人脸识别的并行联合变换相关器的二进制波带片阵列。
DOI：
10.1364/ao.38.003060
复制
发表时间：
1999
期刊：
影响因子：
1.9
通讯作者：
R. Thapliya
中科院分区：
文献类型：
--
作者：
K. Kodate;Asako Hashimoto;R. Thapliya
利用像差小，效率高，结构紧凑，我们开发了一种新的，据我们所知，二进制波带片阵列（BZPA）的设计过程，并将其应用到一个并行联合变换相关器的人脸识别。在液晶空间光调制器（SLM）上显示成对的参考和未知的面图像，通过BZPA进行傅立叶变换，在光学可寻址SLM上记录强度，并进行逆傅立叶变换以获得相关信号。带宽的考虑允许确定通道数、波带片的数值孔径和图案尺寸之间的关系。实验上，五通道并行相关器的实施和测试成功与100人的数据库。文中还介绍了一个20通道BZPA的设计和制作。
Taking advantage of small aberrations, high efficiency, and compactness, we developed a new, to our knowledge, design procedure for a binary zone-plate array (BZPA) and applied it to a parallel joint transform correlator for the recognition of the human face. Pairs of reference and unknown images of faces are displayed on a liquid-crystal spatial light modulator (SLM), Fourier transformed by the BZPA, intensity recorded on an optically addressable SLM, and inversely Fourier transformed to obtain correlation signals. Consideration of the bandwidth allows the relations among the channel number, the numerical aperture of the zone plates, and the pattern size to be determined. Experimentally a five-channel parallel correlator was implemented and tested successfully with a 100-person database. The design and the fabrication of a 20-channel BZPA for phonetic character recognition are also included.