By Jörg R. J. Schirra
As the thematic issue of IMAGE on computational image morphology attempts in particular to mediate between computational visualistics and other disciplines investigating pictures and their uses, the following remarks broaden the perspective again and relate the computational argumentations of the preceding papers to the more general discussion of image science. The two fundamental categories of picture syntax, the geometric base structure and the marker value dimension, are described. They are applied to the questions whether pictures with ill-formed syntax may exist at all, and if so, whether computers can deal with them as well. The overview finally extends the discussion to the limits of pictorial syntax studies.