Part of #Improved Active-mesh-based Motion Estimation by using Bidirectional Motion Estimation algorithm# :
Publishing year : 2012
Conference : First National Conference on Electrical Engineering in Isfahan
Number of pages : 5
Abstract: Motion estimation and compensation is an important part of existing video coding systems. Mesh motion estimation provides smoother estimated intensity fields, better sui ective quality and higher PSNR, resulting in most cases in an amore realistic motion field and a smaller estimation error. However, in MME, 1 computation of a motion vector isaffected by its neighbouring node vectors, which leads to tedious computations and unfeasible me1hod in realtimesystems. In the paper, we use the integral projection algorithm in order to obtain an initial translation estimate and the algorithm of the search algorithm. In the one proposed scheme, hi-directional motion estimation is proposed to construct a 1hemotion vector field for 1 frame to be interpolated. The motion vectors within 1 non-complete patches 1hatconnected to 1 frame frame are computed by the same MME interpolation patterns as in the interior patches, wi1htaking 1 two or one remaining nodes into account. Fur1hermore, in the case of bilinear motion, an activ & lt; & gt; -mesh-basedinterpolation outperforms 1he current mesh-based approach by up to 5 dB for frames. After coding, gains of up to 4.5dB PSNR in comparison with the current mesh-based motion estimation and 2 dB compared with 1 mesh-based motion estimation using an integral projection algorithm are achieved using 1-way Bi-directional motion estimation.