基于多通道体全息相关器的二维离散沃尔什变换

• 作 者: 马强 曹良才 谭峭峰 何庆声 金国藩
• 机 构: 清华大学精密测试技术与仪器国家重点实验室,
• 出 处: 中国激光
• 发表日期: 2009年11期
• 关键词: 体全息 相关器 Walsh变换 信息处理 volume holography correlator Walsh transform information pr

利用体全息相关器(VHC)可以完成多通道内积运算的特性,通过将待变换函数和二维沃尔什(Walsh)函数分别编码成输入图像和存储图像,提出了一种基于多通道体全息相关器的二维离散Walsh变换(DWT)方法。此方法可以快速、并行对输入函数做二维离散Walsh变换,并具有很大的速度提升潜力。利用散斑调制和随机交错方法可以提高运算精度。经验证,实验结果与理论值吻合。

Using the volume holographic correlator (VHC), the multi-channel inner product operation can be completed. By encoding the transform function and the two-dimensional Walsh function into the input image and the stored image respectively, Two Dimensional Discrete Walsh Transform (DWT) Method for Holographic Correlator. This method can quickly and parallelize the input function two-dimensional discrete Walsh transform, and has great potential for speed up. The use of speckle modulation and random staggered method can improve the computational accuracy. It is verified that the experimental results are consistent with the theoretical values.