摘要
提出一种修正振幅调制的光电混合圆谐联合变换相关器作旋转不变的目标检测的实验系统。参考图像（即圆谐展开分量的实部和虚部）、圆盘状的局部偏置函数以及目标图像同时显示于输入面。此方法对联合功率谱作了修正，先将联合功率谱减去纯输入景物（含局部偏置函数）的功率谱和参考图像（含局部偏置函数）的功率谱，再加上局部偏置函数的功率谱，然后将所得修正的联合功率谱乘以振幅调制滤波函数。这种方法能产生比普通的圆谐联合变换相关器更好的相关输出。给出计算机模拟结果及光电混合实验结果。
Rotation invariant target detection
using a modified amplitude modulated hybrid optical circular harmonic joint transform correlator
is proposed. In this technique, the reference images (i.e. the real and imaginary parts of the
circular harmonic component), the disk like local bias function and the target image are
displayed simultaneously in the input plane. The joint power spectrum is firstly modified by the
subtraction of the power spectra of the input scene only (with local bias function) as well as of
the reference image (with local bias function) and by the addition of the power spectrum of the
local bias function from it. Then the resultant modified joint power spectrum is multiplied by the
amplitude modulated filter function. The technique is found to yield a better correlation output
than a classical circular harmonic joint transform correlator does. Computer simulation results
and hybrid optical experimental results are given.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1999年第4期501-507,共7页
Acta Optica Sinica
基金
集美大学水产学院青年专项科研基金
关键词
光学图像
圆谐函数
联合变换相关器
目标检测
optical pattern recognition,
circular harmonic function, joint transform correlator, target detection.
