Abstract. The parametric optimization of coordinates measurement with variations of definition and frame rate by limiting the readout speed of the signal from the image sensor problem is considered. It is shown that the optimal values of definition and frame rate are determined by the alignment of the inter-element and inter-frame difference variances estimates; switching thresholds can be decreased by the delay introducing into the mechanism of measuring these dispersions to increase the observation time with close values of the estimates of these variances.