Object checking system capable of checking object irrespective of checking algorithms for reference data

• US 6,002,783 A
• Filed: 12/24/1997
• Issued: 12/14/1999
• Est. Priority Date: 12/26/1996
• Status: Expired due to Fees

• Current Assignee: Cyber SIGN Japan, Inc., Denso PS Corporation (DENSO Corporation)
• Original Assignee: CADIX, Inc., DENSO Corporation
• Inventors: Tachi, Ryosuke, Obata, Kenzo
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): Werner, Brian P.
• Application Number:
  US08/998,277
• Time in Patent Office: 720 Days
• Field of Search: 382/115, 382/116, 382/119-127, 705/18, 705/44, 356/71, 340/825.34, 902/5, 902/6, 902/26, 178/19.01-19.07, 235/382
• US Class Current: 382/119
• CPC Class Codes: G06V 40/30 Writer recognition; Reading and verifying signatures

Abstract

An object checking system, particularly a signature checking system, verifies each card carrier by checking a signature entered from a tablet provided for a signature checking terminal device with a reference data stored in an IC card carried by the card carrier. The card is provided with a signature checker used to check the signature according to the checking algorithm corresponding to the reference data. The terminal device sends the hand-written signature to the card and receives the check result from the signature checker. Thus, the terminal device can verify the card carrier regardless of the type of the reference data stored in the card. In addition, only the signature checking program may be stored in the card, so that the terminal device reads the checking program to check the target signature or many signature checking programs may be stored in the terminal device in advance.

Claims

1. An object checking system, comprising:

a portable information memory storing therein reference data provided from a first image of an object according to a specified image checking algorithm in advance; and

a checking terminal device having input means for converting a second image of an object to image data and entering said image data, so that said image data entered from said input means is checked with said reference data stored in said information memory, wherein

said information memory is provided with checking means for checking said image data with said reference data according to an image checking algorithm corresponding to said reference data, and

said image checking terminal device is provided with input/output means for outputting said image data entered from said input means to said information memory so that said image checking means can check said image data, as well as for reading a check result from said image checking means, wherein;

said information memory stores said reference data in compressed form together with data compression information indicative of a type of a specified data compressing method; and

said checking means includes a plurality of data expansion means corresponding to said plurality of compressing methods and discriminator means for discrimination said data compressing method from said data compression information added to said reference data, so that said reference data is restored to its original one using one of said data expansion means corresponding to said compressing method discriminated by said discriminator means before said image data is checked with said reference data.

2. The object checking system of claim 1, wherein said image is a signature of a carrier of said portable information memory.

3. An object checking system, comprising:

a portable information memory storing therein reference data provided from a first image of an object according to a specified image checking algorithm in advance; and

an image checking terminal device provided with input means for converting a second image of an object to image data and entering said image data, so that said image data entered from said input means is checked with said reference data stored in said information memory, wherein

said information memory stores an image checking program to be used to check said image data with said reference data according to said image checking algorithm, and

said image checking terminal device is provided with check means for reading said reference data and said checking program from said information memory and for checking said image data entered from said input means with said reference data according to said checking program, wherein;

said information memory stores said reference data in compressed form together with data compression information indicative of a type of a specified data compressing method; and

said checking means includes a plurality of data expansion means corresponding to said plurality of compressing methods and discriminator means for discrimination said data compressing method from said data compression information added to said reference data, so that said reference data is restored to its original one using one of said data expansion means corresponding to said compressing method discriminated by said discriminator means before said image data is checked with said reference data.

4. The object checking system of claim 3, wherein said image is a signature of a carrier of said portable information memory.

5. An object checking system, comprising:

a portable information memory storing reference data provided from a first image of an object according to a specified image checking algorithm in advance; and

an image checking terminal device provided with input means for converting a second image of object to image data and for entering said image data, so that said image data entered from said input means is checked with said reference data stored in said information memory, wherein

said information memory stores ID data indicating a type of a checking algorithm by which said reference data is provided in advance, and

said image checking terminal device includes

checking program means for storing a plurality of image checking programs each of which is for checking said image data entered from said input means with said reference data stored in said information memory according to different checking algorithms,

selector means for reading said ID data from said information memory to select said checking program corresponding to said ID data from among said plurality of checking programs stored in said checking program means, and

check means for checking said image data entered from said input means with said reference data stored in said information memory corresponding to said checking program selected by said program selector means, wherein;

said information memory stores said reference data in compressed form together with data compression information indicative of a type of a specified data compressing method; and

said checking means includes a plurality of data expansion means corresponding to said plurality of compressing methods and discriminator means for discrimination said data compressing method from said data compression information added to said reference data, so that said reference data is restored to its original one using one of said data expansion means corresponding to said compressing method discriminated by said discriminator means before said image data is checked with said reference data.

6. The object checking system of claim 5, wherein said image is a signature of a carrier of said portable information memory.