| 摘要 |
<P>PROBLEM TO BE SOLVED: To change content of images with reference to a vanishing point in a perspective projection drawing method while maintaining operability and visibility of a user. <P>SOLUTION: A display device 10 performs processing for changing content of images with reference to a vanishing point according to an operation for a touch screen 11D, so that, for example, a user does not need to tilt the touch screen and visibility of the user does not become worse. Also, since the display device 10 performs processing for changing content of images with reference to the vanishing point when an operation in a direction along a vanishing line passing through the vanishing point is performed, in comparison with such a case that processing for changing content of images with reference to the vanishing point is performed when an operation in a direction completely different from the vanishing line is performed, the reference of the operation direction by the user matches the reference of change content of images, so that the user can perform operations with a natural feeling. <P>COPYRIGHT: (C)2012,JPO&INPIT |
