Conventional approaches to interactive computer graphics do not always seem appropriate for certain kinds of two-dimensional design (e.g. art, graphics). This paper discusses an approach to computer graphics in which the interaction between the man and the machine is viewed as a process of communicating interpretations. The task for the man is to describe the structure perceived in the displayed image. The task for the machine is to derive an interpretation consistent with the user's perception by utilizing the image (the bitmap of a raster display) and the description of it provided by the user. Examples of techniques used in this approach are discussed, including those for handling figure/ground perceptions. It is argued that by using such techniques it is possible for the user to manipulate unstructured images interactively.
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