发明名称 |
Enhanced data capture from imaged documents |
摘要 |
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. |
申请公布号 |
AU6495601(A) |
申请公布日期 |
2002.02.25 |
申请号 |
AU20010064956 |
申请日期 |
2001.05.25 |
申请人 |
DAVID D. S. POOR;CTB/MCGRAW-HILL LLC |
发明人 |
DAVID D. S. POOR |
分类号 |
G06K7/12;G06K9/20;G06K9/32;G06K17/00 |
主分类号 |
G06K7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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