TY JOUR TI Exploring the gibbs effect in approximation of discontinuous functions and processing contrast images KW the Gibbs effect KW the approximation KW Fourier series KW image processing KW numerical experiment JO Actual directions of scientific researches of the XXI century: theory and practice AU Danilova, K.. AU Filimonenkova, N.. AU Mironova, P.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov