Document camera having zoom-indication function

Details Document camera having zoom-indication function Document camera having zoom-indication function

2007-07-17

2007-07-17

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C348S207100, C348S207110, C396S430000

Reexamination Certificate

active

11238752

ABSTRACT:
A document camera is used to show image of an object on a display. In the document camera, a first image data of the object obtained by a video-capturing device is derived into a second image data and a third image data by an image processor in response to a zoom operation, wherein the second image data results in a zoomed image of the object and the third image data results in a scaled image of the object. In response to the zoom operation, there is also a mark frame data generated by a position information controller, which results in a mark frame. The zoomed image, scaled image and mark frame are then synthesized into a combined image by an image synthesizer, and the mark frame superimposes the scaled image to indicate a result of the zoom operation.

REFERENCES:
patent: 2004/0223058 (2004-11-01), Richter et al.

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