@conference {Keuchel-et-al-04a, title = {Hierarchical Image Segmentation based on Semidefinite Programming}, booktitle = {Pattern Recognition, Proc. 26th DAGM Symposium}, series = {lncs}, volume = {3175}, year = {2004}, pages = {120-128}, publisher = {Springer}, organization = {Springer}, author = {Keuchel, J. and Heiler, M. and Schn{\"o}rr, C.} }