Card recording medium, certifying method and apparatus for the recording medium, forming system for recording medium, enciphering system, decoder therefor, and recording medium
First Claim
Patent Images
1. A card recording medium comprising:
- a data area where data containing ID information of a holder are recorded; and
an image area where image data are recorded;
wherein contents in the image area are recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with the ID information and inversely transforming the added data to image signals.
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Abstract
In a card type recording medium containing a data area where data containing ID information of a holder are recorded, and an image area where image data are recorded, in the image area are recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with the ID information and inversely transforming the added data to image signals.
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Citations
50 Claims
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1. A card recording medium comprising:
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a data area where data containing ID information of a holder are recorded; and an image area where image data are recorded; wherein contents in the image area are recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with the ID information and inversely transforming the added data to image signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of certifying a card recording medium which contains a data area where data containing ID information of a holder are recorded, and an image area where image data are recorded, in the image area being recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with the ID information and inversely transforming the added data to image signals, comprising:
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a first step for restoring the ID information from said card recording medium and reading data of the image area; a second step for transforming the image-area data to the frequency-area data to generate first transformed image data; a third step for gaining the same data as the first image data from a reading target other than said recording medium and transforming the image data thus gained to the frequency-area data to obtain second transformed image data; and a fourth step for subtracting the second transformed image data from the first transformed image data to obtain differential data, and comparing the differential data with the ID information restored from said card recording medium to judge whether said recording medium is justifiable. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A card recording medium enciphering system including enciphering means for enciphering ID information to be recorded on a magnetic card, and magnetic information forming means for recording the enciphered ID information as magnetic information on said magnetic card, comprising:
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frequency domain transformation means for transforming an original image pattern of a pattern of said magnetic card; adding means for transforming ID information to be recorded on said magnetic card to transformation information in which the ID information is distributed on a frequency domain, and adding the transformation information with the information which is generated by the transformation of said frequency domain transformation means; frequency domain inverse transformation means for restoring the information of the frequency domain generated by the addition of said adding means to a two-dimensional image pattern; and image pattern print means for printing the image pattern generated by said frequency domain inverse transformation means on said magnetic card so that the image pattern is used as the pattern of said magnetic card. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A card recording medium decoder for a recording medium on which enciphered ID information and an image pattern containing ID information are printed, comprising:
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a magnetic reader for reading the enciphered ID information from a magnetic stripe of said recording medium; frequency domain transformation means for transforming the pattern of said magnetic card to frequency domain information by a magnetic head; deciphering means for deciphering the enciphered ID information and outputting ID information; image reading means for reading the image pattern; frequency domain transformation means for transforming the image pattern to frequency domain; a subtracter for subtracting from the frequency domain data frequency domain information to which the ID information is transformed; and frequency domain inverse transformation means for restoring the frequency domain information generated by the subtraction of said subtracter to a two-dimensional image pattern.
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28. A card recording medium in which specific data for specifying a holder are written, comprising:
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identification data generated on the basis of the specific data which are embedded into spatial frequency data of a photograph; and the spatial frequency data embedded with the identification data which are inversely transformed to time data to generate image data and further record the image data thus generated. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A card recording medium forming system comprising:
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means for generating identification data on the basis of specific data for specifying a holder; means for transforming a photograph to be attached onto said card to spatial frequency data; means for multiplying each component of the spatial frequency data and the component corresponding to the identification data, and adding a value obtained by multiplying the multiplication value and a constant to the component corresponding to the spatial frequency data of the photograph data, and then inversely transforming the added spatial frequency data to image data; and means for writing the image data and the specific data on said card type recording medium. - View Dependent Claims (39)
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40. A card recording medium certifying device for certifying a card recording medium in which identification data generated on the basis of the specific data are embedded into spatial frequency data of a photograph, then the spatial frequency data embedded with the identification data are inversely transformed to time data to generate image data, and then the image data are recorded together with the specific data, comprising:
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means for generating the identification data on the basis of the specific data; transformation means for transforming the image data to the spatial frequency data; and means for performing a correlation calculation between the output of said transformation means and the identification data and judging on the basis of the correlation calculation result whether the card recording medium is true or not.
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41. A recording medium for storing a program for operating a card recording medium forming system in a computer, wherein said program contains:
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a step of generating identification data on the basis of specific data specifying a holder; a step of transforming a photograph to be attached to spatial frequency data; a step of multiplying each component of the spatial frequency data and the component corresponding to the identification data, and adding a value obtained by multiplying the multiplication value and a constant to the component corresponding to the spatial frequency data of the photograph image, and inversely transforming the added spatial frequency data to image data; and a step of writing the image data and the specific data on the card recording medium. - View Dependent Claims (42)
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43. A recording medium for storing a program for operating in a computer a checking system for a card recording medium in which identification data generated on the basis of the specific data are embedded into spatial frequency data of a photograph, then the spatial frequency data embedded with the identification data are inversely transformed to time data to generate image data, and then the image data are recorded together with the specific data, comprising:
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a step of generating the identification data on the basis of the specific data; a step of transforming the image data to the spatial frequency data; and a step of performing a correlation calculation between the output of said transformation means and the identification data and judging on the basis of the correlation calculation result whether the card recording medium is true or not.
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44. A card recording medium comprising:
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a data area where data containing ID information inherent to a holder are recorded; and an image area where image data are recorded, wherein said image area are recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with data obtained by transforming the ID information to frequency-area information, and inversely transforming the added data to image signals. - View Dependent Claims (45, 46, 47, 48, 49)
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50. An apparatus for certifying a card recording medium which contains a data area where data containing ID information of a holder are recorded, and an image area where image data are recorded, in the image area being recorded second image data which are generated by transforming first image data specifying the holder to frequency-area data, adding the transformed frequency-area data with the ID information and inversely transforming the added data to image signals, comprising:
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an ID information reader for restoring the ID information from said card recording medium; an image reader of reading the image-area data; a conversion unit for transforming the image-area data to the frequency-area data to generate first transformed image data; a second image reader for reading the same image data as the first image data from a reading target other than said recording medium; a second conversion unit for transforming the image data thus obtained to the frequency-area data to obtain second transformed image data; a subtracter for subtracting the second transformed image date from the first transformed image data to obtain differential data; and a judgment circuit for comparing the differential data with the ID information restored from said card recording medium to judge whether said card recording medium is justifiable.
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Specification