System and method for reliable content access using a cellular/wireless device with imaging capabilities
First Claim
1. A method to use part of a printed or displayed medium for identifying a reference and using the reference to access at least one of information, services, and content related to the reference, the method comprising:
- capturing an image of the reference with an imaging device;
sending the image via a communications network to a processing center;
pre-processing by the processing center to identify at least one relevant frame within the image and to perform general purpose enhancement operations;
detecting most relevant frame within the image and frame properties comprising at least one of pixels, axis ratio, and illumination characteristics;
applying geometric, illumination, and focus correction on the most relevant frame;
using color, aspect ration, and frame color, to perform a coarse recognition and thereby limit a number of possible identifications of the reference within the most relevant frame; and
using rescaling, histogram equalization, block labeling, edge operation, and normalized cross correlation, to identify the reference within the image.
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Abstract
A system and method for reliable content access using a cellular/wireless device with imaging capabilities, to use part of a printed or displayed medium for identifying and using a reference to access information, services, or content related to the reference, including capturing an image of the reference with an imaging device, sending the image via a communications network to a processing center, pre-processing to identify relevant frames within the image and to perform general purpose enhancement operations, detecting the most relevant frame within the image, and frame properties, applying geometric, illumination, and focus correction on the relevant frame, using color, aspect ration, and frame color, to perform a coarse recognition and thereby limit the number of possible identifications of a reference within the relevant frame, and using specific techniques of resealing, histogram equalization, block labeling, edge operation, and normalized cross correlation, to identify the reference within the image.
172 Citations
21 Claims
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1. A method to use part of a printed or displayed medium for identifying a reference and using the reference to access at least one of information, services, and content related to the reference, the method comprising:
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capturing an image of the reference with an imaging device; sending the image via a communications network to a processing center; pre-processing by the processing center to identify at least one relevant frame within the image and to perform general purpose enhancement operations; detecting most relevant frame within the image and frame properties comprising at least one of pixels, axis ratio, and illumination characteristics; applying geometric, illumination, and focus correction on the most relevant frame; using color, aspect ration, and frame color, to perform a coarse recognition and thereby limit a number of possible identifications of the reference within the most relevant frame; and using rescaling, histogram equalization, block labeling, edge operation, and normalized cross correlation, to identify the reference within the image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer program product, comprising instructions for causing a computer to perform a method comprising:
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capturing an image of a reference with an imaging device; sending the image via a communications network to a processing center; pre-processing by the processing center to identify at least one relevant frame within the image and to perform general purpose enhancement operations; detecting most relevant frame within the image, and frame properties comprising at least one of pixels, axis ratio, and illumination characteristics; applying geometric, illumination, and focus correction on the most relevant frame; using color, aspect ratio, and frame color, to perform a coarse recognition and thereby limit a number of possible identifications of the reference within the most relevant frame; and using specific techniques of rescaling, histogram equalization, block labeling, edge operation, and normalized cross correlation, to identify the reference within the image.
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Specification