匹配滤波器中参考目标位置对相关峰位置的影响

Effect of reference target location in matched filter on correlation peak location

针对利用光学相关器识别运动多目标的精确定位问题,提出了参考图像目标置中的匹配滤波器设计方法。该方法根据场景图像中目标位置、匹配滤波器中参考目标位置和相关峰位置之间的关系,采用将目标放置在参考图像中心以克服单一目标和运动多目标识别过程中相关峰的不确定偏移。实验结果表明,在范德卢格特型光电混合相关器中,采用该方法设计匹配滤波器可以使相关峰位置与目标位置一一对应,并且能够直观的实时显示出被识别目标在场景图像中的位置,提高了运动目标的定位准确性和跟踪稳定性。

To locate the moving multiple targets accurately by using optical correlator, a design method of matched filter by putting the reference target in the center of image was presented. The relationships of correlation peak location with target location in input image and reference target location were discussed when the target was placed in centre of reference image. The location of correlation peak could reflect the direction and distance of target deviating from center of scene image, and the indefinite displacement was eliminated for recognizing both single target and moving multiple targets. Experimental results of Vander Lugt Correlator （VLC） are shown that putting the reference target in the center of image, it can correctly locate and track the target of scene image