@article {1855, title = {A sufficient condition for non-uniqueness in binary tomography with absorption}, journal = {Theoretical Computer Science}, volume = {346}, year = {2005}, month = {2005}, pages = {335-357}, type = {Journal Article}, abstract = {

A new kind of discrete tomography problem is introduced: the reconstruction of discrete sets from their absorbed projections. A special case of this problem is discussed, namely, the uniqueness of the binary matrices with respect to their absorbed row and column sums when the absorption coefficient is n=log((1+5^0.5)/2). It is proved that if a binary matrix contains a special structure of 0s and 1s, called alternatively corner-connected component, then this binary matrix is non-unique with respect to its absorbed row and column sums. Since it has been proved in another paper [A. Kuba, M. Nivat, Reconstruction of discrete sets with absorption, Linear Algebra Appl. 339 (2001) 171–194] that this condition is also necessary, the existence of alternatively corner-connected component in a binary matrix gives a characterization of the non-uniqueness in this case of absorbed projections.

}, doi = {10.1016/j.tcs.2005.08.024}, author = {Attila Kuba and Maurice Nivat} }