Method and apparatus for indicating a field of view for a document camera
First Claim
1. A document camera, comprising:
- a lens with a zoom mechanism;
a photo detector for capturing a first electronic image of a document imaged by the lens;
an image processor for processing the first electronic image of the document captured by the photo detector;
the image processor determining a capture zone within the first electronic image of the document;
the capture zone identifying one or more complete zones within the first electronic image of the document imaged by the lens;
a projector for projecting a field of view indicator onto the document imaged by the tens that identifies the capture zone;
a controller for controlling the zoom mechanism to capture a second electronic image of the capture zone identified by the field of view indicator;
the second electronic image recording the capture zone with a greater resolution than the first electronic image.
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Accused Products
Abstract
A document camera is described for capturing an electronic image of a document, for subsequent optical character recognition. In order to avoid the need for a user to look through a viewfinder of the camera, the camera comprises a projector for projecting an optical field of view indicator on to the document. The user can see the projected indicator on the document page, indicating the effective field of view of the camera. The camera may include auto-focus and zooming mechanisms. In one form, the camera processes a detected image to determine a capture zone corresponding to whole regions of the document falling entirely within the field of view. The projected indicator is controlled to indicate only the capture zone. When the image is to be captured, the camera zooms in to the capture zone to capture the image at maximum resolution.
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Citations
20 Claims
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1. A document camera, comprising:
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a lens with a zoom mechanism;
a photo detector for capturing a first electronic image of a document imaged by the lens;
an image processor for processing the first electronic image of the document captured by the photo detector;
the image processor determining a capture zone within the first electronic image of the document;
the capture zone identifying one or more complete zones within the first electronic image of the document imaged by the lens;
a projector for projecting a field of view indicator onto the document imaged by the tens that identifies the capture zone;
a controller for controlling the zoom mechanism to capture a second electronic image of the capture zone identified by the field of view indicator;
the second electronic image recording the capture zone with a greater resolution than the first electronic image.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating a document camera with a lens with a zoom mechanism, the method comprising:
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capturing a first electronic image of a document imaged by the lens with a photo detector of the document camera;
processing the first electronic image of the document captured by the photo detector with an image processor of the document camera;
the image processor determining a capture zone within the first electronic image of the document;
the capture zone identifying one or more complete zones within the first electronic image of the document imaged by the lens;
projecting a field of view indicator onto the document imaged by the lens that identifies the capture zone;
controlling the zoom mechanism to capture a second electronic image of the capture zone identified by the field of view indicator;
the second electronic image recording the capture zone with a greater resolution than the first electronic image.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification