PHOTOGRAPHIC DOCUMENT IMAGING SYSTEM
First Claim
Patent Images
1. A method for processing a captured image that comprises an imaged document with perspective distortion;
- said method comprising;
detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image;
selecting one or more lines from said graphical information corresponding to edges of said imaged document;
calculating corners of said imaged document based on intersections of said one or more lines corresponding to edges of said imaged document;
isolating said imaged document from background of said captured image based on said one or more lines corresponding to edges of said imaged document;
computing deviations of said imaged document from a non-distorted perspective of said imaged document; and
generating a new image of said imaged document with reduced perspective distortion based on said computed deviations.
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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.
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Citations
6 Claims
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1. A method for processing a captured image that comprises an imaged document with perspective distortion;
- said method comprising;
detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image; selecting one or more lines from said graphical information corresponding to edges of said imaged document; calculating corners of said imaged document based on intersections of said one or more lines corresponding to edges of said imaged document; isolating said imaged document from background of said captured image based on said one or more lines corresponding to edges of said imaged document; computing deviations of said imaged document from a non-distorted perspective of said imaged document; and generating a new image of said imaged document with reduced perspective distortion based on said computed deviations. - View Dependent Claims (2, 3, 4)
- said method comprising;
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5. A computer readable storage medium for processing a captured image, said captured image comprising an imaged document, the computer readable storage medium carrying one or more sequences of one or more instructions which, when executed by one or more processors, cause the one or more processors to perform the computer-implemented steps of:
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detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image; selecting one or more lines from said graphical information corresponding to edges of said imaged document; calculating corners of said imaged document based on intersections of said one or more lines corresponding to edges of said imaged document; isolating said imaged document from background of said captured image based on said one or more lines corresponding to edges of said imaged document; computing deviations of said imaged document from a non-distorted perspective of said imaged document; and generating a new image of said imaged document with reduced perspective distortion based on said computed deviations.
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6. An apparatus for processing a captured image, said captured image comprising an imaged document, said apparatus comprising:
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one or more processors; and a memory communicatively coupled to the one or more processors, the memory including one or more sequences of one or more instructions which, when executed by the one or more processors, cause the one or more processors to perform the steps of; detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image; selecting one or more lines from said graphical information corresponding to edges of said imaged document; calculating corners of said imaged document based on intersections of said one or more lines corresponding to edges of said imaged document; isolating said imaged document from background of said captured image based on said one or more lines corresponding to edges of said imaged document; computing deviations of said imaged document from a non-distorted perspective of said imaged document; and generating a new image of said imaged document with reduced perspective distortion based on said computed deviations.
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Specification