| 摘要 |
A document presentation device 10 includes a video signal controller 50 adapted to output a video signal of a video image for display on a display unit 40; and a remote controller RC. The video signal controller 50 includes a video signal processing unit 60 for creating a live video image within the field captured by an image sensor 31a; a zoom setting unit for setting in advance an enlargement ratio for the zoom image; and a zoom image control unit that upon receiving an instruction from a zoom instruction unit of the remote controller RC displays on the display unit 40 an enlarged live image of a portion of the live video image at the enlargement ratio that is set in advance by the zoom setting unit; and that upon receiving an instruction from a position instruction unit of the remote controller RC, changes the zoom field.
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