METHOD MEASURING RESOLUTION OF OPTICOELECTRONIC SYSTEM OF DISTANT SOUNDING ON LOCATION

摘要

FIELD: evaluation of quality of opticoelectronic systems of distant sounding by way of measurement of their resolution on location. SUBSTANCE: aerial survey of test object (line mire) is conducted and its image is obtained. Transformation xo is executed on central part of image with arrangement of signals and isolation of group of four maxima. Then one switches to system of coordinates related to rectangle of mire, amplitude Ai of lines in groups in image (i=1, n) and their area Sfi are computed. Later root-mean-square deviation of noise in image is calculated and signal-to-noise ratio Φi is computed by formula where k1 is coefficient taking into account number of stripes in group of lines. Setting probability of detection of lines one finds value Φ*@i which meets in the greatest degree standard decoding model. Width L of stripe on location that can still be differentiated visually in image is obtained by formula L = ((Φ*@i)2sigma2epsiiM)/(k2.Ai),, where k2 is coefficient taking into account number of lines in each group and area of line in image; epsii is length of stripe on location for selected i-th group. Obtained width of stripe on location determined resolution value of opticoelectronic system of distant sounding on location. EFFECT: most objective evaluation of resolution of systems of distant sounding on location. 3 dwg