Method and apparatus for recognizing text in an image sequence of scene imagery
First Claim
Patent Images
1. Method for recognizing text in a captured imagery, where said captured imagery is of a three-dimensional scene, said method comprising the steps of:
- (a) detecting a text region in the captured imagery;
(b) adjusting along three axes said detected text region to produce a rectified image; and
(c) applying optical character recognition (OCR) processing to said rectified image to recognize the text in the captured imagery.
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Abstract
An apparatus and a concomitant method for detecting and recognizing text information in a captured imagery. The present method transforms the image of the text to a normalized coordinate system before performing OCR, thereby yielding more robust recognition performance. The present invention also combines OCR results from multiple frames, in a manner that takes the best recognition results from each frame and forms a single result that can be more accurate than the results from any of the individual frames.
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Citations
43 Claims
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1. Method for recognizing text in a captured imagery, where said captured imagery is of a three-dimensional scene, said method comprising the steps of:
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(a) detecting a text region in the captured imagery;
(b) adjusting along three axes said detected text region to produce a rectified image; and
(c) applying optical character recognition (OCR) processing to said rectified image to recognize the text in the captured imagery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Apparatus for recognizing text in a captured imagery, where said captured imagery is of a three-dimensional scene, said apparatus comprising:
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means for detecting a text region in the captured imagery;
means for adjusting along three axes said detected text region to produce a rectified image; and
means for applying optical character recognition (OCR) processing to said rectified image to recognize the text in the captured imagery. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. Method for recognizing text in a captured imagery having a plurality of frames, said method comprising the steps of:
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(a) detecting a text region in a frame of the captured imagery;
(b) applying optical character recognition processing (OCR) to said detected text region to identify potential text for said frame; and
(c) agglomerating the OCR identified potential text over a plurality of frames in the captured imagery to recognize the text in the detected text region. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. Apparatus for recognizing text in a captured imagery having a plurality of frames, said apparatus comprising:
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means for detecting a text region in a frame of the captured imagery;
means for applying optical character recognition processing (OCR) to said detected text region to identify potential text for said frame; and
means for agglomerating the OCR identified potential text over a plurality of frames in the captured imagery to extract the text in the detected text region. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification