| 摘要 |
PROBLEM TO BE SOLVED: To select an index in accordance with the change of the number of indexes or density when they are changed and to optimally select the index by deciding that a gazing point detected by a line-of-sight detection means for detecting the gazing point of a user looking in observation field is in a specified distance from the index and making the specified distance differ in every operation mode in an index selection means for selecting the index when the gazing point is in the specified distance. SOLUTION: When the coordinates of the gazing point obtained by detecting the line of sight are in an area R016 , the index P016 is selected. When they are in an area R210 the index P210 is selected. When the coordinates of the gazing point are in an Rex , $ no index is selected. For example, when the coordinates of the gazing point obtained by the line-of-sight detection means are x=5 and y=-2.5, the gazing point exists in an area K416 , so that the index P416 is selected. In the area where the index of a 45-point mode exists, the size of the area of one index differs in every mode differently from a 11-point mode. Furthermore, the range of the coordinates of the gazing point where any index is selected differs in every mode. |
