Abstract: In order to browse between a collection of datasets susceptible of graphical representation, these datasets are associated with points on a sliding scale of one, two or three dimensions. When a point corresponding to a particular dataset is selected by a user via a mouse pointer etc. it is rendered as a graphical representation and presented to the user. When an intermediate point is selected, a interpolation of the datasets corresponding to the nearby points is generated and the resulting dataset rendered as a graphical representation and presented to the user. The interaction may be implemented with a slider bar type widget having hybrid behaviour such that clicking on the bar causes the button to jump to the nearest point corresponding to a data, while sliding to a chosen intermediate position activates the interpolation of adjacent datasets.

Abstract: Datasets such as two dimensional raster images or three dimensional voxel based representations are often processed for representation using a transfer function defined by a curve. A mechanism for manually adjusting such curves is described, whereby a user adds a second curve. The transfer curve is recalculated so as to draw closer to the second curve. By drawing the second curve in the shape required for the transfer curve, and repeating this gesture as the transfer curve evolves, the user can subtly and interactively develop the transfer curve until the processed representation is exactly as required. The attractive effect of the points of the first curve on those of adjacent point on the first curve and on those of the second may be attractive or repellent, may vary in any manner as a function of distance, and in particular may imitate the effects of physical forces such as magnetic, elastic, etc.

Abstract: An interaction mechanism is defined for the navigation of a representation of a physical space, whereby events or entities of interest outside the current view are detected, and flagged by adding a visual indicator at or near the edge of the view closest to the entity in question. By designating the visual indicator, for example with a mouse click or by directing the user's gaze at the visual indicator, the representation is prompted to modify the representation to include the space incorporating the entity of interest. The point of view may revert to the initial point of view on a further user action or after a predetermined time, or the original point of view may be flagged as a new entity of interest which the user may then select. Multiple points of interest may be defined such that the user may jump from point to point.

Abstract: A zoom operation in an eye tracking based graphical user interface, where the zoom operation, as initiated by a scroll wheel etc. takes place with respect to the focus of the user's attention as determined on the basis of eye tracking data. Mechanisms for determining the point of attention based on a sliding window recording point of regard and subject to a variety of weighting functions are proposed.

Abstract: A graphical user interface supporting eye tracking is enriched with graphical representations of the degree of attention afforded respective areas of the user interface. These representations may comprise heatmaps, visual variable and the like. The generation of these representations may furthermore be used to adjust other user interface behaviour, for example by repositioning a mouse cursor to a part of the screen afforded greater protection. The attention information of a plurality of users may be compiled together and used to modify the graphical representation, providing each user with an indication of the focus of attention of their colleagues, thereby establishing a group awareness.