Method and apparatus for data capture from imaged documents
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United States of America Patent
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Mar 22, 2011
Grant Date -
Dec 25, 2008
app pub date -
Jun 18, 2008
filing date -
Aug 11, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and apparatus are disclosed for locating an area of interest within a digital image of a form captured by an imaging scanner. Specific examples include methods and apparatus for optical mark reading with a digital imaging scanner. In many of the methods, an image of a response form is captured by a scanner, and “target” areas for possible responses are located within the image based upon an expected location being adjusted as necessary for certain error-inducing defects in the forms or scanning process. Also disclosed are steps to normalize the darkness values of pixels captured from an optically scanned form.
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