A.V. Bogoslovsky, I.V. Zhigulina, V.A. Jakovlev

Mathematical models of double differences of phase-energy spectrum and energy spectrum are analyzed. Areas of their applicability in the field of an image shot are defined. The condition of reliable successful work of double differences of phase-energy spectrum is installed: the pixel of object the most remote from the proximal edge of a line should place from edge of a line not further, than on 1/3 its lengths. Experimental association of displacement of the given estimation on value of a root-mean-square deviation of a Gaussian noise with zero mathematical expectation is gained. The coarse theoretical estimation of such displacement is given. The new formula for calculation of double differences of frequency characteristics is gained. The formula allows lowering computing expenditures considerably. Agency of subject contrast on a relative frequency of its detection is sized up. It is shown that the algorithm of double differences of phase-energy spectrum works better at any contrasts. Double differences of energy spectrum and interframe differences of vision signal at small contrasts work almost equally.