Optical wavelet correlators for cluttered target identification
Optical wavelet correlators for cluttered target identification
复制标题
用于杂乱目标识别的光学小波相关器
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
Mary Wen
中科院分区：
文献类型：
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作者：
Xiangyang Yang;N. Caviris;Mary Wen
提出了一种新型的光学小波相关器。这些光学小波相关器不是计算目标与参考模式之间的相关性，而是计算目标与参考模式的小波变换系数之间的相关性。它结合了小波变换的高效特征检测和噪声抑制能力，以及物体固有的高速和二维特性。特征提取和目标识别操作在一个步骤中完成。通过适当选择小波函数及其膨胀因子，这些小波相关器能够在杂波和噪声存在的情况下有效地识别目标。本文讨论了Vander lutt型小波相关器和小波联合变换相关器的结构。描述了一种特别适合于光学实现的小波函数。给出了初步的实验结果。
Novel optical wavelet correlators are presented in this paper. Instead of computing the correlation between the target and the reference patterns, these optical wavelet correlators compute the correlation between the wavelet transform coefficients of the target and reference patterns. It incorporates the efficient feature detection and noise suppression capabilities of wavelet transformation and the inherent high sped and 2D nature of objects. The feature extraction and target identification operations are performed in a single step. By suitably choosing the wavelet functions and their dilation factors, these wavelet correlators are capable of effectively recognizing targets in the presence of clutter and noise. Architectures for both Vander Lugt-type wavelet correlator and wavelet joint transform correlator are discussed in the paper. A wavelet function especially suitable for optical implementation is described. Preliminary experimental results are provided.