@article {Keuchel-et-al-02a, title = {Binary Partitioning, Perceptual Grouping, and Restoration with Semidefinite Programming}, volume = {25}, number = {11}, year = {2003}, pages = {1364{\textendash}1379}, author = {Keuchel, J. and Schn{\"o}rr, C. and Schellewald, C. and Daniel Cremers} }