A term, valid pixel ratio, has been put forward and then is applied to analyze the effects of noise and asymmetry on the location for initial target discount wedding dresses region, and then got the most macropixels and restricting lace wedding dresses operation way to confirm the objective macropixels. For the unsymmetry target spot image, the most macropixels is custom made prom dresses pixels and target macropixels is enlarged by 2 pixels. The value of r is 1 when SNR is 6dB. For precise target location, we have obtained macropixels method by chi flat iron store improving Zeev Z’s method. By improving weight function, ration function of Zeev Z’s method and blog lace wedding dresses adjust the size of macropixels along with changing direction of iterative, the ability to restrict noise is enhanced obviously. For objective model, when SNR is -5 dB, centroid error using macropixels method is only 0.38 pixels.The experiments show that the localization error of about 2.5μrad was achieved and its processing speed was about 18-20 frames/s for the macropixels method in measuring systems, and can be used in APT systems absolutely.
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