Resources Contact Us Home
Locating edges of a scanned document

Image Number 7 for United States Patent #6839155.

A structure and method for improved detection of the edges of a document in a scanner provides for positioning a width detection backer so that it is simultaneously in the field of view of the optical element of the scanner and out of the focal plane of the optical element. A portion of a document is positioned in the optical path between the optical element and the width detection backer and scanned with the optical element. Information from the scanning step is analyzed to identify data indicative of an edge of the document. The out of focus width detection backer, which remains stationary while scanning the document portion presents very little variation in intensity and other data, heightening the contrast between the document and the width detection backer, and reducing the likelihood of erroneously identifying elements of the width detection backer as document edge features.

  Recently Added Patents
Motor with power-generation coil module
Method of making and using an alpha-glucanase composition to reduce or remove biofilm
Data processing apparatus, activation control method, and computer-readable storage medium
Converter and measuring apparatus
Purine compounds used as CB2 agonists
Internal wiring structure of semiconductor device
Method and apparatus for generating images using a color field sequential display
  Randomly Featured Patents
Apparatus and method for measuring ground amounts of liquid crystal display panel
Laser driver, optical disk apparatus using the same, and laser control method
Antennas encapsulated within plastic display covers of computing devices
Electric wood splitter
Methods for inhibiting an immune response by blocking the GP39/CD40 and CTLA4/CD28/B7 pathways and compositions for use therewith
Magnetic tape cassette
Remote sensing gas analyzer
Clutch and mammography device
Spray booth for powder coating
Tag attacher