Optical: systems and elements – Lens – With viewed object support
Reexamination Certificate
2005-09-06
2005-09-06
Thompson, Timothy (Department: 2873)
Optical: systems and elements
Lens
With viewed object support
C359S807000, C359S804000
Reexamination Certificate
active
06940664
ABSTRACT:
The present invention relates to the use of a camera and a structured light pattern in a platenless document imaging system (1) to capture the image of a page or of a bound book together with depth information that can be inferred from the light pattern. The imaging system (1) comprises a support surface (12) for a document (30) to be imaged, a light stripe projector (4) arranged to project a plurality of diverging sheets of light that extend from the projector (4) towards the support surface (12) for forming a series of stripes across the document (30), a camera (2) having a detector array (22) for capturing an image of the document (30) and of light stripes projected onto the document (30), a processor (25) arranged to receive (23) from the detector array (22) data representative of images of the document (30) and of the light stripes and to calculate therefrom a three-dimensional profile of the document (30) relative to a reference surface, characterised in that the relative divergence of adjacent sheets of light varies laterally across the sheets so that the stripes are concentrated where the divergence is relatively low.
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Foley & Lardner LLP
Hewlett--Packard Development Company, L.P.
Thompson Timothy
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