Personal authentication system and method thereof
First Claim
1. A method of authenticating a subject, comprising:
- reading a two-dimensional bar code of the subject that contains personal data of the subject, the reading comprising correcting a distortion of an image of the two-dimensional bar code obtained from an area sensor by a projection transform, correcting brightness imbalance of the bar code image, and decoding the two-dimensional bar code based on image data of the two-dimensional bar code after the distortion correction and the brightness correction;
capturing a facial image of the subject to provide facial data of the subject;
reading a finger print of the subject to provide finger print data of the subject; and
performing an authentication of the subject based on the personal data, the facial data and the finger print data,wherein the brightness correction comprises dividing the image of the two-dimensional bar code into a plurality of blocks, and correcting the brightness imbalance for each of the blocks, andthe brightness correction for each of the blocks comprises determining a block standard value based on a brightness distribution among pixel elements in said each of the blocks, and determining a standard value for the whole image based on a brightness distribution of the whole image, the brightness correction for each of the blocks being performed based on the block standard values and the standard value of the whole image.
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Abstract
A personal authentication system of this invention has a card reader, in which a bar code reading device for reading a two-dimensional barcode containing personal data, a CMOS image sensor for producing face data by photographing the face of a person, and a fingerprint reading device for producing fingerprint data by reading the fingerprint of the person are assembled as one unit. A personal computer performs a projection transform and a brightness correction to the barcode read by the card reader for acquiring accurate data. Then, the personal data, the face data, and the fingerprint data are compared with database for authenticating the person. Therefore, this invention achieves more accurate personal authentication and leads to improved security.
26 Citations
2 Claims
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1. A method of authenticating a subject, comprising:
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reading a two-dimensional bar code of the subject that contains personal data of the subject, the reading comprising correcting a distortion of an image of the two-dimensional bar code obtained from an area sensor by a projection transform, correcting brightness imbalance of the bar code image, and decoding the two-dimensional bar code based on image data of the two-dimensional bar code after the distortion correction and the brightness correction; capturing a facial image of the subject to provide facial data of the subject; reading a finger print of the subject to provide finger print data of the subject; and performing an authentication of the subject based on the personal data, the facial data and the finger print data, wherein the brightness correction comprises dividing the image of the two-dimensional bar code into a plurality of blocks, and correcting the brightness imbalance for each of the blocks, and the brightness correction for each of the blocks comprises determining a block standard value based on a brightness distribution among pixel elements in said each of the blocks, and determining a standard value for the whole image based on a brightness distribution of the whole image, the brightness correction for each of the blocks being performed based on the block standard values and the standard value of the whole image. - View Dependent Claims (2)
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Specification