Applying qualitative line arrangements


A qualitative representation and calculus for line arrangements has been introduced. In particular, we have investigated how this representation allows qualitative descriptions of polygons, forming a concise means of representing shapes’ boundaries. We shall now discuss characteristics of this representation which are related to coarse shape approximations (which maintain only specific global shape properties). We do this by employing our approach to graphically query for images. Such graphical queries are to be sketched by the user who will be looking for objects with specific characteristics. These characteristics are outlined at a coarse granularity level by the user, who is capable of sketching the desired shape only roughly. We will show that qualitative line arrangements allow us to represent these characteristics well enough to use them in querying for similar objects.


Quantitative Approach Recall Rate Granularity Level Relevant Image Shape Property 
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© Deutscher Universitäts-Verlag | GWV Fachverlage GmbH, Wiesbaden 2007

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