In these methods, only distance information in vector space is used. From practical point of view, this is only effective when using visual user interface. In this paper, we present our user interface and its generative algorithms. We have built a prototype system, and did experiments using a small set of documents. We assume that the interface is 2-D, because it seems difficult for human to grasp or specify object space using more than 2 dimensions.
Users specify the picture of object feature space that they have in their mind.
The user interface is composed by these two axes. So, it is desirable that two yardstick objects in a pair are poles apart from each other. The objects in the neighbourhood of the query object are retrieved. The projections of the objects on that line are computed using the cosine law . In FastMap algorithm, the pairs of objects which define axes are automatically selected by the system, while they are selected by users in our method.