Research And Application Of Digital Matting Technique Based On Sp-Graph-Cut

Matting refer to separate the foreground image from an image out of the technology.In the film and television production,commercial and home entertainment and other fields have a wide range of applications.According to the mask image value 0,the value 1 or 0 to 1,digital matting technique can be divided into 0-1 matting and Alpha matting.Current cutout technique requires a lot of manual interaction,very high standards for professional,semi-automatic cutout algorithm can reduce the amount of human interaction,but the result is not satisfactory,long running time.The Graph Cuts algorithm is studied in this paper,in the Super pixel method based on improved digital matting technique based on Sp-Graph-Cut is proposed.In the case of decrease the amount of interaction,not only good matting effect and speed has been significantly improved.First of all,in order to reduce the redundancy of local information,image processing complexity is greatly reduced.Image pretreatment using Super pixel method,structure diagram,greatly reducing the number of nodes,accelerating the speed of Graph Cuts algorithm.While using edge,color,shape and texture combined with the Super pixel description operator,with the traditional super pixel blocks compared to using a single description,to better describe the characteristics of Super pixel,in measuring the similarity between the Super pixel has better performance.Secondly,Graph Cuts algorithm generates a prospect tag the image classification and clustering,current SCC algorithm,its classification and clustering of clustering tasks are dependent on such posterior probabilities,and that it does not apply to semi-supervised scenario.Paper do a little improvement,and Laplacian regularization was introduced,a new method,SemSR method,comparing their speed SCC algorithm about an order of magnitude,and SemSR through the manifold regularization method is relatively easy to extend to semi-supervised scenario.Finally,we introduced the related principle-oriented filters and Alpha channel,and describes the Alpha by selecting orientation filter cutout reasons.Experimental results better,faster completion of the cutout,and cutout effect has been significantly improved.Therefore,digital matting technique based on the Sp-Graph-Cut algorithm is feasible and effective.