JPH0510705B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fingerprint registration device in which fingerprint data is registered in advance for personal identification.

[Conventional technology]

Fingerprint verification is one of the methods for determining the suitability of passersby at the entrances and exits of specific areas that require special monitoring, such as computing centers, financial institutions, and nuclear power plants.

As a device that automatically performs such fingerprint verification, for example, Weekly Jewelry (August 1989 No. 24, 31
There is a fingerprint recognition machine from Company I that was announced in the magazine,
The purpose was to determine whether the fingerprint of one finger matched a previously registered fingerprint.

[Problem that the invention seeks to solve]

In conventional fingerprint recognition devices such as those mentioned above, the finger to be used for fingerprint registration and reading is predetermined, so if the finger has no distinctive characteristics or is difficult to identify due to an injury, the ability to identify individuals will be extremely poor. There was a problem that the performance decreased.

The present invention was made to solve the above-mentioned problems, and allows even people who have fingers with no distinctive fingerprints or fingers whose fingerprints are difficult to distinguish due to injury etc. to register a substitute finger. It is an object of the present invention to provide a fingerprint registration device that can significantly improve personal identification ability.

[Means for solving problems]

The fingerprint registration device according to the present invention includes a data creation means for obtaining, as fingerprint data, characteristic parameters of a specific small area in a video signal obtained by photographing fingerprints taken from a plurality of fingers of the same person, and a direction code in the characteristic parameters. a selection means for comparing reliability values of and selecting a feature parameter having a large reliability value as fingerprint data suitable for personal identification; and a storage means for storing the fingerprint data selected by the selection means. and display means for displaying the name of the fingerprint data selected by the selection means.

[Effect]

In this invention, the data creation means obtains feature parameters taken from a plurality of fingers of the same person as fingerprint data, and the selection means selects from these fingerprint data those with high reliability of the direction codes of the feature parameters. Fingerprint data suitable for identification is selected and stored in the storage means, and a designation name corresponding to the stored fingerprint data is displayed on the display means to inform the registrant of which finger fingerprint has been registered. , use this finger to discriminate.

〔Example〕

The figure is a block diagram showing the configuration of an embodiment of the present invention, and 1 to 5 in the figure are the thumb, index finger,
A fingerprint data creation unit that creates fingerprint data for the middle finger, ring finger, and little finger; 6 a camera that takes a fingerprint and generates a video signal; 7 converts the video signal from the camera into an A/D converter, and converts the fingerprint lines into data. The output image processing unit 8 is a feature parameter extraction unit that converts fingerprint line data into feature parameters and outputs them. The feature parameter is extracted from the location information of the subregion, the direction code of the small area, and the reliability of the direction code. This is a value quantitatively expressing whether or not. The camera 6, image processing section 7, and feature parameter extraction section 8 constitute each fingerprint data creation section. Further, 9 is a comparator that compares the reliability values of direction codes among the feature parameters of the fingerprint data creation units 1 to 5 and outputs the feature parameter with the largest value, and 10 is a feature parameter output from the comparator 9. An adder that adds
Practically speaking, feature parameters other than those corresponding to any one finger are "0", so here they serve as an OR circuit, and 11 to 15 correspond to fingerprint data creation units 1 to 5. an indicator 1 that is provided and lights up only when data is output from the comparator 9;
6 is a feature parameter memory that sequentially stores the output data of the adder 10 and stores feature parameters of a large number of registrants; 17 is a feature parameter memory in which the person whose fingerprint is registered is
This is an address setting switch for determining at which address of the characteristic parameters 16 the characteristic parameters 16 are to be stored.

In the fingerprint registration device configured as described above, a person who registers a fingerprint operates through the fingerprint data creation units 1 to 1.
When the finger is placed at a position where it can be photographed by each of the cameras 6 of 5, the camera 6 photographs it and adds a video signal to the image processing section 7. The image processing unit 7 A/D converts these video signals and outputs the fingerprint lines as data. Further, the feature parameter extraction unit 8 converts and outputs the position information of a specific small area, the direction code of the small area, and the reliability value of the direction code from this fingerprint line data as the registrant's feature parameters.

In this way, the fingerprint data creation units 1 to 5 each output the characteristic parameters of the thumb, index finger, . . . , little finger as fingerprint data.

Next, the comparator 9 compares the reliability values of the direction codes among the feature parameters of the five fingers, and outputs only the one feature parameter with the largest value. As a result, the display device corresponding to the finger with the largest characteristic parameter, that is, any one of the display devices 11 to 15, is lit to notify the registrant. From now on, the registrant will use this finger to identify and pass the test.

On the other hand, when the registrant who recognizes that one of the displays 11 to 15 lights up operates the address setting switch 17 to specify the address of the memory where the fingerprint data is stored, the characteristic parameters output from the comparator 9 are It is stored at the specified address in the feature parameter memory 16.

Note that the feature parameter memory 16 stores the feature parameters of a large number of registrants, and for example, the registrant remembers the name and address where the feature parameters are stored, and places his/her finger on the fingerprint reader at the time of discrimination. At the same time, quick personal identification is performed by specifying an address using a numeric keypad or the like.

In this way, if the feature parameters of the finger with the highest reliability value of the direction code in the feature parameters are stored among the five fingers, it is possible to eliminate the possibility that a particular finger does not have fingerprint features or Even in cases where fingerprints are difficult to identify, the fingerprints of other fingers are automatically registered, so even people who have difficulty identifying fingerprints using conventional devices can easily identify them using this embodiment.

Furthermore, storing the characteristic parameter having the largest value among the five fingers not only facilitates fingerprint discrimination but also greatly improves personal identification ability.

Note that the present invention is not limited to the above-mentioned embodiments, and the same discrimination as described above can be made even if the present invention is modified as shown in the following sections (a) to (i).

(a) In the above embodiment, the comparator 9 selects the direction code with the largest reliability value among the feature parameters added to it, but instead, the direction code of the feature parameters already registered is selected. The one with the highest reliability value may be selected; all that is required is a selection means for comparing it with a predetermined allowable reference value and selecting fingerprint data suitable for personal identification.

(b) Furthermore, the selection means may select a finger that has a fingerprint on it and that is easy to perform image processing on.

(c) The registrant may visually judge which finger is appropriate and register it.

(c) An ID (personal identification) card may be used instead of the address setting switch, and a pair of ID number and characteristic parameter may be stored in the memory.
Fingerprint identification may be performed using this data.

(e) When identifying an individual using two or more fingers, it is sufficient to select characteristic parameters for the number of fingers and store them in the memory.

(f) Although the above embodiment has five fingerprint data creation units, one fingerprint data creation unit sequentially obtains the characteristic parameters of the five fingers and then selects the appropriate one. By doing so, although registration takes time, the cost of the device becomes cheaper.

(g) This fingerprint registration device may be configured as a set with a fingerprint discrimination device.

(h) The memory for storing fingerprint data such as characteristic parameters may be of a portable type such as a floppy disk or a cassette tape.

(i) The number set by the address setting switch and the number on the ID card may be made to correspond or match.

〔Effect of the invention〕

As explained above, according to the present invention, data suitable for personal identification is registered from fingerprint data of characteristic parameters collected from multiple fingers of the same person, and it is possible to display which finger's fingerprint has been registered. Therefore, even a person who has difficulty in identifying a particular finger print can register a more suitable fingerprint and know the registered contents, thereby greatly improving personal identification ability.

[Brief explanation of the drawing]

The figure is a block diagram showing the configuration of an embodiment of the present invention. 1 to 5: Fingerprint data creation section, 6: Camera, 7:
Image processing section, 8: Feature parameter extraction section, 9: Comparator, 10: Adder, 11 to 15: Display device, 1
6: Feature parameter memory, 17: Address setting switch.

Claims (1)

[Scope of Claims] 1. Data creation means for obtaining feature parameters of a specific small region in a video signal obtained by capturing fingerprints taken from a plurality of fingers of the same person as fingerprint data, and reliability of direction codes in the feature parameters. a selection means for comparing reliability values and selecting a feature parameter with a large reliability value as fingerprint data suitable for personal identification; and a storage means for storing the fingerprint data selected by the selection means; A fingerprint registration device comprising display means for displaying a name of the fingerprint data selected by the selection means. 2. The fingerprint registration device according to claim 1, wherein the selection means selects a feature parameter having a large comparative difference in reliability from among the feature parameters stored in the storage means.