| 摘要 |
The present invention relates to a system and method for improving the navigation of complex visualizations on a computer display for the visually impaired persons to toggle between objects or nodes. An object or node may be a square, a circle or other object which a display screen may show. The objects or nodes have characteristics which may include a name which indicates the name of the node, a direction which indicates the direction of the next node to progress to (along an arc), priority which indicates the priority that the node has with respect to other nodes, properties which indicates the certain properties of the node, and operation which indicates the operation to be performed. The system has a user indicator for indicating to the visually impaired user the characteristics of the objects or nodes which are connected by arcs. The node or object characteristics are informed to the user by the indicator to allow the user to toggle from one node to the other along the arc route. The system has a control center which has a receiver for receiving the toggle commands and node characteristics from each node. The toggle command moves a selector (which selects which object is being acted upon—sometimes, for visually unimpaired people, the selected object is shown in bold or a distinct color) to the next node according to the characteristics. The receiver also passes the node characteristics to a parser. The parser parses the node characteristics and passes it on to the director for determining the next step. The director examines the characteristics, such as name, direction, properties, and operations, and indicates to the user the characteristics of the node—generally by audible means but not so limited. This allows the visually impaired user to ascertain where he/she on the display. This is generally done by way of an audible device but could be accomplished in other ways.
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