Using Target Variance for Optimum Zoom Setting in ATRM. Mirmehdi, P.L. Palmer, J. Kittler, Using Target Variance for Optimum Zoom Setting in ATR. IEE Electronic Letters, 33 (6). ISSN 0013-5194, pp. 479–480. March 1997. No electronic version available.
This Letter describes a technique for determining the best magnification to zoom in onto a target object while it is still at a long range. The zoom process is modelled on the expected signal from the object and the background. The variance in a region of interest is shown to be an SNR indicator for the optimal zoom.