Model-based dewarping method and apparatus
First Claim
Patent Images
1. A method for processing a captured image that comprises an imaged document;
- said method comprising;
separating text areas from the remainder of said captured image;
enhancing the direction of text lines in said text areas;
extracting said text lines;
selecting from said extracted text lines at least two representative text lines;
selecting a polynomial function to fit each of said representative text lines; and
determining a vanishing point based on information derived from said representive text lines.
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Abstract
An apparatus and method for processing a captured image and, more particularly, for processing a captured image comprising a document. In one embodiment, an apparatus comprising a camera to capture documents is described. In another embodiment, a method for processing a captured image that includes a document comprises the steps of distinguishing an imaged document from its background, adjusting the captured image to reduce distortions created from use of a camera and properly orienting the document is described.
57 Citations
11 Claims
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1. A method for processing a captured image that comprises an imaged document;
- said method comprising;
separating text areas from the remainder of said captured image; enhancing the direction of text lines in said text areas; extracting said text lines; selecting from said extracted text lines at least two representative text lines; selecting a polynomial function to fit each of said representative text lines; and determining a vanishing point based on information derived from said representive text lines. - View Dependent Claims (2, 3, 4, 5, 6)
- said method comprising;
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7. A method for processing a captured image that comprises an imaged document;
- said method comprising;
separating text areas from the remainder of said captured image; enhancing the direction of text lines in said text areas; extracting said text lines; and selecting a polynomial function to fit said text lines, wherein said enhancing step further comprising the steps of detecting distance between said text lines; compressing said captured image under a compression rate; computing direction for each pixel in said text lines; eliminating gaps between characters so that characters in the same text line connect together, but characters not in the same text line are separated. - View Dependent Claims (8, 9, 10, 11)
- said method comprising;
Specification