Assessing frequency response of video motion magnification techniques

Abstract

Video Motion Magnification (VMM) methods are finding a range of diverse applications ranging from biomedicine, vibration and acoustical analyses to forensics but their frequency responses have not been fully investigated. The aim of this study was to assess the frequency response of VMM techniques in case of vibrations that have a multicomponent spectral structure. The main outcome of this study shows that the frequency response of VMM techniques is corrupted in a lesser or greater extent. A range of unwanted frequencies related to multiples of the consecutive differences between the major spectral components is added to the signal. This is caused by the spatial wrap-around artifacts. The application of Riesz Pyramids based on convolution provides the best among the techniques studied suppression of this effect.