| 摘要 |
PROBLEM TO BE SOLVED: To realize the operation changing a display in the expansive or reductive direction in real-time by user's simple input operation and to mitigate a limit in display magnification. SOLUTION: When the user performs the operation pushing a left or right button of a mouse 111 while pushing a shift key of a key board 112 in the state that the user operates the mouse 111, and moves a mouse cursor on a picture area of a display device 140 to a required reference position, whether a real-time display in the expansive or reductive direction is instructed is detected by an expansive/reductive direction detection device 121. An expansive/ reductive picture generation device 123 calculates a display subject frame and the display magnification based on a lapse time and the reference position in the period when the operation is performed, and reads in the display data within the display subject frame from a virtual picture storage 130, and expands or reduces them at the calculated display magnification, and executes repeatedly the operation displaying on the picture area. |
