Methods combining multiple frames of image data
First Claim
1. A method for processing printed subjects, the method comprising:
- capturing, via an optical capture device, a first set of image data that represents a text-bearing physical object;
capturing, via the optical capture device, a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data;
identifying a portion of one of the first or second sets of image data that is unreliable for recognizing text from the text-bearing physical object; and
using a software-configured processing, via a processor, the first and second sets of image data to recognize text therefrom;
wherein the processing takes into consideration that a portion of one of the first or second sets of image data is unreliable.
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Accused Products
Abstract
In one embodiment a document authentication station, for use with passports or the like, includes a 2D image sensor (e.g., CCD- or CMOS-based video camera), and a computer device. The image sensor produces produce image data corresponding to a presented document. From this image data, the computer extracts two or more identification data. One is a digital watermark. The other can be a bar code, data glyphs, OCR data, etc. The processor then proceeds to check that the two identification data correspond in an expected fashion. If not, the document is flagged as suspect or fake. Reliability of detection can be enhanced by processing plural frames of data from the image sensor before issuing a result.
305 Citations
21 Claims
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1. A method for processing printed subjects, the method comprising:
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capturing, via an optical capture device, a first set of image data that represents a text-bearing physical object; capturing, via the optical capture device, a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; identifying a portion of one of the first or second sets of image data that is unreliable for recognizing text from the text-bearing physical object; and using a software-configured processing, via a processor, the first and second sets of image data to recognize text therefrom; wherein the processing takes into consideration that a portion of one of the first or second sets of image data is unreliable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12, 16)
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8. A method for processing printed subjects, the method comprising:
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capturing, via an optical capture device, a first set of image data that represents a text-bearing physical object; capturing, via the optical capture device, a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; identifying a region in the first set of image data that is relatively more reliable for recognizing text than a corresponding region of the second set of image data; identifying a region in the second set of image data that is relatively more reliable for recognizing text than another corresponding region of the first set of image data; combining image data from the reliable region in the first set of image data with image data from the reliable region in the second set of image data; and performing, via a processor, an optical character recognition operation to recognize text from the combined image data. - View Dependent Claims (9, 10, 11, 13, 14, 15, 17)
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18. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising:
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instructions for capturing a first set of image data that represents a text-bearing physical object; instructions for capturing a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; instructions for identifying a portion of one of the first or second sets of image data that is unreliable for recognizing text from the text-bearing physical object; and instructions for processing the first and second sets of image data to recognize text therefrom, wherein the processing takes into consideration that a portion of one of the first or second sets of image data is unreliable.
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19. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising:
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instructions for capturing a first set of image data that represents a text-bearing physical object; instructions for capturing a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; instructions for identifying a region in the first set of image data that is relatively more reliable for recognizing text than a corresponding region of the second set of image data; instructions for identifying a region in the second set of image data that is relatively more reliable for recognizing text than another corresponding region of the first set of image data; instructions for combining image data from the reliable region in the first set of image data with image data from the reliable region in the second set of image data; and instructions for performing an optical character recognition operation to recognize text from the combined image data.
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20. An apparatus comprising:
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an optical capture device configured to; capture a first set of image data that represents a text-bearing physical object; and capture a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; and a processor coupled to the optical capture device, wherein the processor is configured to; identify a portion of one of the first or second sets of image data that is unreliable for recognizing text from the text-bearing physical object; and process the first and second sets of image data to recognize text therefrom, wherein the processing takes into consideration that a portion of one of the first or second sets of image data is unreliable.
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21. An apparatus comprising:
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an optical capture device configured to; capture a first set of image data that represents a text-bearing physical object; and capture a second set of image data that represents the text-bearing physical object, wherein the second set of image data is different than the first set of image data; and a processor coupled to the optical capture device, wherein the processor is configured to; identify a region in the first set of image data that is relatively more reliable for recognizing text than a corresponding region of the second set of image data; identify a region in the second set of image data that is relatively more reliable for recognizing text than another corresponding region of the first set of image data; combine image data from the reliable region in the first set of image data with image data from the reliable region in the second set of image data; and perform an optical character recognition operation to recognize text from the combined image data.
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Specification