JPS63247095A - Ic card - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an IC card having an identity verification function.

[Prior art and its problems] In conventional IC cards, a PIN number for identity verification is stored in the built-in memory, and the identity is determined by comparing it with the number entered into the reader/writer. There is.

However, since the identity of the person is verified only by checking the PIN number, the problem is that if the entered numbers match, it will be automatically determined that the person is the person, regardless of whether or not the person is actually the person. It had a point. For this reason, unauthorized use by others could not be sufficiently prevented.

[Means for Solving the Problems] The IC card according to the present invention is characterized by having a memory storing image data for identity verification.

[Operation] Image data makes it possible to identify the person in question, making it possible to confirm the person's identity much more reliably than with just a PIN number.

As the image data, an image obtained by converting an image such as a face photograph, a seal stamp, or a handwritten signature into an electrical signal may be used.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1(A) is a schematic diagram of an embodiment of an IC card according to the present invention, and FIG. 1(B) is a schematic diagram showing its memory map.

In the same figure (A), the CPUI includes a clock CLK supplied from the outside, a reset signal R5T, a power supply Vcc and a
Operated by ND, controls memory 2 and data SIO
Write or read.

The memory 2 is preferably an EPROM or an EEPROM, and the program power supply VPP is supplied externally.

As shown in FIG. CB), the memory 2 stores image data such as a face photograph, a signature, a seal, etc. in addition to the password. Of course, appropriate image data may be selected and stored depending on the purpose.

FIG. 2 is a schematic system configuration diagram showing an example of how to use this embodiment.

In the figure, an IC card 1° according to the present embodiment is inserted into a league writer 11 to input and output data.

The league writer 11 is connected to a computer 12, and the computer 12 is connected to a video memory 13. Video memory 13 displays input image data on monitor 14 under the control of computer 12 . A video camera 15 is also connected to the video memory 13 to store captured image data.

In the above system, identity verification work is performed as follows.

First, the customer sets the IC card IO into the league writer 11 and inputs the password. If the passwords match, the computer 12 reads, for example, image data of a facial photograph and displays it on the monitor 14. Therefore, it is possible to reliably determine whether or not the holder of the card 10 is the owner of the card 10 based on the facial photograph. For example, it is extremely effective for verifying the identity of a customer at a credit counter at a store.

Next, a method for storing one image data in an IC card will be explained.

i3 Figures (A) and (B) are flowcharts showing a method of storing image data.

In the case of a facial photograph ((A) in the same figure), video camera 15
The person's face is photographed using the camera, and the image data is stored in the video memory 13.

Here, the video memory 13 has a capacity of 256 x 256 x 8 bits, and the gradation is 8 bits (256th floor 'i').
J! J) Yes, but it is necessary to compress this image data in order to store it in an IC card 10 whose memory capacity is not so large. Furthermore, 256 gradations are not necessary for identity verification, and 16 gradations are sufficient. Another advantage is that the time required for data transmission can be reduced.

Therefore, in this system, the gradation is changed from 8 bits to 4 bits (
(16 gradations) and converts each pixel into 4-bit data.
Store it in the memory 2 of the C card 1o. The data compression method will be described later.

In the case of a signature/seal (FIG. 2(B)), the image is similarly photographed using the video camera 15, and the image data is stored in the video memory 13.

Image data for signatures and seals does not require gradation like face photographs, so after the data is binarized, it is written to the memory 2 of the IC card using the run-length method. This will be explained later.

(Data Compression Method) FIG. 4 is an explanatory diagram of the data compression method, and FIG. 5 is an explanatory diagram of gradation expression showing a dot pattern on the screen corresponding to 4-bit data.

As shown in FIG. 4, the dot configuration of the face photo 20 is 256.
This is represented by a pixel 21 consisting of 4 x 4 dots.

A 4×4 dot pixel can express 16 WI tones as shown in FIG. 5, and this gradation expression can be performed using 4-bit data. Therefore, if one byte of data 22 is divided into upper and lower four bits, one byte of data 22 can represent two pixels. Specifically, if it is a face photo of 256 x 256 dots, it will be 256/8.
It is only necessary to store X256/4=2048 bytes of data in memory 2.

Conversely, when playing back a facial photograph, one byte of data 22 stored in memory z is divided into upper and lower 4 bits, and each 4-bit data is used to display one pixel 21 (
As shown in Figure 5, 4-bit data can represent a 4x4 dot pattern in 16 gradations, so one byte of data in memory 2 can be used to This means that pixels can be expressed in 16 gradations.

In this way, a face photo 2 made up of 256 x 256 dots
2 can be displayed on a monitor in 16 gradations with 4×4 dots as one pixel.

(Run-length method) As described above, image data of signatures and seals does not require gradation expression, and the data can be treated as binary data. Therefore, a run-length method is adopted to reduce the amount of data.

FIG. 6 is a schematic diagram showing a dot configuration when the image data is a signature and a seal stamp, and FIG. 7 is an explanatory diagram of an example of the run-length method.

Signature dot configuration 30 and seal stamp dot configuration 31
In , each dot of image data is represented by 1 or 0, and 1 or 0 is j! ! In many cases, this is followed by
By configuring one byte of data based on how many 1's or O's follow, the amount of data can be significantly reduced.

In other words, as shown in Fig. 7, the first 1 bit (part A) of 1 byte of data represents whether the dot is 1 or O, and the remaining 7 bits (part B) represent 'a'. Expresses the number of dots (run-length method); however, in this method, the amount of data varies depending on the format of the image. Here, the maximum is 1536 bytes.

By storing image data such as facial photographs, signatures, and seals in the memory z using the above method, it is possible to greatly improve the reliability of identity verification without wasting memory. In particular, identity verification performed by displaying a face photo is reliable.6 In addition, in the above embodiment, a face photo is exemplified as having a gradation, and a signature, a seal, etc. are exemplified as things that can be binarized. The information is not limited to the above, but any data that can identify the person and can be treated as image data may be used.

[Effects of the Invention] As explained in detail above, the IC card according to the present invention makes it possible to identify the identity of the person based on image data, and is much more reliable than one using only the M identification number. You can confirm your identity.

[Brief explanation of drawings]

FIG. 1(A) is a schematic diagram of an embodiment of an IC card according to the present invention, FIG. 1(B) is a schematic diagram showing its memory map, and FIG. 2 is a diagram showing how to use this embodiment. A schematic system configuration diagram showing an example. Figures 3 (A) and (B) are flowcharts showing a method for storing one image data. Figure 4 is an explanatory diagram of a data compression method. Figure 5 is a 4-bit data compression method. Fig. 6 is a schematic diagram showing the dot configuration when the image data is a signature and a seal; Fig. 7 is an example of the run-length method. FIG. l...CPU 2...ΦMemory lθψ-・IC card 11...Reader/writer 12...Computer 13-◆・Video memory 14 Skewer・Skewer monitor 15@...Video camera 20-ψ・Face photo Dot composition 21... Pixel 22... 1 byte data 30... Dot composition of signature 31, φ, Dot composition of seal Agent Patent attorney Seki Yamashita + [A (A) Figure 2, Figure 3 Figure (A) (B) Figure 4 Figure 5 01H hard 09H 02H yen OAHm 03H40BHW 05H book ODH size 068 yen OEH field 07H% OFH! 1 Figure 6

Claims (1)

[Claims] (1) An IC card characterized by having a memory storing image data for identity verification.