Miller P C
Department of Computer Science, The Queen's University, Belfast BT7 1NN, Northern Ireland.
Appl Opt. 1999 Aug 10;38(23):5014-8. doi: 10.1364/ao.38.005014.
The performance of an automatic target recognition (ATR) system with full- and reduced-resolution correlators was compared. In addition, the ATR system performance with reduced-resolution filter sets designed by use of multiresolution analyasis (MA) and downsampling (DS) techniques was also compared. It was discovered that results obtained at the optical correlator subsystem level, pertaining to the relative merits of the MA and the DS techniques, could not be extrapolated to the system level. This was because target signature differences between the test and the training imagery were discovered to have a greater influence on system performance than the choice of filter design technique. In addition, it was found that, for the case in which the target signature and the reduced-resolution filter were of the same size, there was some degradation in the receiver-operating-characteristic curve for reduced resolution compared with full. Nevertheless, this was deemed to have no practical significance, and thus the use of reduced-resolution optical correlators for ATR merits serious consideration.
对具有全分辨率和低分辨率相关器的自动目标识别（ATR）系统的性能进行了比较。此外，还比较了采用多分辨率分析（MA）和下采样（DS）技术设计的低分辨率滤波器组的ATR系统性能。结果发现，在光学相关器子系统层面获得的、与MA和DS技术的相对优点相关的结果，无法外推到系统层面。这是因为发现测试图像和训练图像之间的目标特征差异对系统性能的影响比滤波器设计技术的选择更大。此外，还发现，在目标特征和低分辨率滤波器大小相同的情况下，与全分辨率相比，低分辨率的接收者操作特征曲线存在一定程度的退化。然而，这被认为没有实际意义，因此，在ATR中使用低分辨率光学相关器值得认真考虑。
