JPH09265521A - Fingerprint input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the arrangement space for the fingerprint input device which picks up an image of an impressed fingerprint and collects the fingerprint. SOLUTION: This device has a fingerprint impression base 1, a light source 2, a camera 3, an image input part 8, an arithmetic processing part 9, a data processing part 4 including a registration part 10, and a display part 7. On the finterprint impression base 1, a matrix switch plate 5 is provided which has electrodes in orthogonal arrangement that come into a contact state at intersections by depression, and on this matrix switch plate 5, an input detection part 6 is provided which detects the depression position of an input point on a detachable template from the intersection position brought into contact with the matrix switch plate 5 and inputs it to the data processing part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fingerprint input device for capturing and inputting a fingerprint with a camera. In the fingerprint registration device and the fingerprint collation device, a method is adopted in which a fingerprint pressed on a fingerprint printing platform is imaged by a camera and the imaged image signal is processed by a processor or the like to collect the fingerprint. A fingerprint input device for collecting such a fingerprint is required, and an ID number and a personal identification number are also required.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory view of a conventional example, on a fingerprint imprinting base 51 comprising a prismatic glass plate 51a having a reflecting surface 51c at one end, a flat glass plate 51b, and a transparent elastic film 51d. A finger 61 is pressed to illuminate from a light source 52 such as a lamp or a light emitting diode, and a camera 53 such as a CCD camera takes an image. An image signal captured by the camera 53 is input to the data processing unit 54. The data processing unit 54 can be composed of, for example, a personal computer.

In the data processing section 54, an analog image signal is converted by an image input section 58 into multi-valued image data capable of displaying 256 gradations with an 8-bit structure and input to a calculation processing section 59. During fingerprint registration, image data including fingerprint feature points is registered in the registration unit 60 by binarization processing, thinning processing, feature point extraction processing, or the like. Further, at the time of fingerprint collation, the fingerprint registered in the registration unit 60 is collated with the imprinted fingerprint, and the identity is confirmed by the collation coincidence.

Further, it is provided with an input operation section 56 such as a ten-key pad for inputting an ID number or a personal identification number, and a display section 57 such as a CRT display section or a liquid crystal panel display section for displaying input guidance or input contents. For example, when the ID number “123450” is input from the input operation unit 56 in accordance with the display content of “Enter ID number” on the display unit 57, the input content is displayed with an underline. Also, in accordance with the display of "Please press # at the end", input operation unit 5
When the # button 6 is pressed, the data processing unit 54 is notified of the end of the input operation. In addition, the personal identification number and the like are entered in the same manner.

When the fingerprint is collated, the ID is input from the input operation unit 56.
By inputting the number or the personal identification number, the registered fingerprint corresponding to the ID number or the personal identification number is read from the registration unit 60,
A method of collating a fingerprint imprinted on the fingerprint imprinting base 61 with a fingerprint image captured by the camera 63 and a method of simply comparing the fingerprint imprinting base 61
A fingerprint image obtained by capturing the fingerprint imprinted on the camera 63 with the camera 63,
There is a system for collating with registered fingerprints sequentially read from the registration unit 60, but the former method is generally used.

[0006]

In the fingerprint input device of the conventional example, the input operation part 56 and the display part 57 are arranged in the vicinity of the fingerprint imprinting base 61, and the display part 57 may be omitted. is there. Therefore, at least the fingerprint imprinting base 61 and the input operation unit 56 are arranged, and the input operation unit 56
Since there is a limit to the miniaturization from the viewpoint of operability, there is a limit to the reduction of the arrangement space.

By arranging the fingerprint imprinting base 61 and the input operation unit 56 such as a ten-key pad, it can be predicted that the input of the ID number and the personal identification number is necessary. That is, it is understood that the fingerprint collation cannot be performed only by fingerprint imprinting, and a mischief by the input operation unit 56 can be considered. Further, the camera 63 takes an image of the entire surface of the fingerprint imprinting base 61, and the position where the finger 61 is placed cannot be found without searching the entire imaging screen. Therefore, if the fingerprint imprinting surface is widened, the imprinted fingerprint image is obtained. There is a problem that it takes a long time to search for. An object of the present invention is to reduce the size of a fingerprint input device and to simplify imprinted fingerprint image processing.

[0008]

A fingerprint input device according to the present invention will be described with reference to FIG. 1. (1) Fingerprint printing platform 1
A light source 2 for illuminating an imprinted fingerprint on the fingerprint imprinting base 1, a camera 3 for picking up an imprinted fingerprint illuminated by the light source 2, and a data processing unit 4 for processing an image pickup signal from the camera. In the provided fingerprint input device, a transparent matrix switch plate 5 whose intersections are brought into contact with each other by pressing is provided on the fingerprint printing base 1, and the position where the input point is pressed by a removable template is provided on this matrix switch plate 5. Is detected by the position of the intersection of the contact states of the matrix switch plate 5 and input to the data processing unit 4. That is, the imprinting surface of the fingerprint imprinting base 1 or a part thereof can be used as an input operation unit.

(2) The matrix switch plate 5 is provided in the fingerprint imprinting area of the fingerprint imprinting base 1, and the input detection unit 6 detects the intersection point position of the contact state of the matrix switch plate 5 at the time of fingerprint imprinting. Area data is input to the data processing unit 4, and when input by the template, the intersection point position of the contact state of the matrix switch plate is input to the data processing unit 4 as the pressing position information of the input point by the template.

(3) The matrix switch plate 5 is provided at a position adjacent to the fingerprint printing area of the fingerprint printing platform 1, and the matrix switch plate 5 is provided with the pressing position of the input point by the removable template on the matrix switch plate 5. It is possible to provide an input detection unit 6 for detecting the position of the contact point of the contact state and inputting data to the data processing unit 4.

(4) The matrix switch plate 5 has a structure in which the orthogonal electrodes are supported by a transparent elastic film so that the intersections of a plurality of orthogonal electrodes are always in an insulating state and are brought into contact with each other by pressing. The input detection unit 6 has a scanning signal applied sequentially to one of the orthogonal electrodes and detects a scanning signal derived to the other through an intersection of contact states to detect the pressing position of the matrix switch plate 5. It is equipped with a configuration.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of an embodiment of the present invention, in which 1 is a fingerprint printing plate, 1a is a prism-shaped glass plate, 1b is a flat glass plate, 1c is a reflecting surface, and 2c is a reflecting surface. Is a light source, 3 is a camera, 4 is a data processing unit, 5 is a matrix switch plate, 6 is an input detection unit, 7 is a display unit, 8 is an image input unit, 9 is an arithmetic processing unit, 10 is a registration unit, 11 is a finger. Indicates.
The fingerprint imprinting base 1 has a structure in which a glass plate 1a having a prism shape and having a reflecting surface 1c and a flat glass plate 1b are combined in the same manner as in the conventional example, but various known structures are applied. be able to.

The matrix switch plate 5 has a structure in which the electrodes are supported by a transparent elastic film so that the intersections of a plurality of electrodes arranged orthogonally are always in an insulating state and are brought into contact with each other by pressing. When the intersection of the electrodes at the pressed position is brought into contact, the pressed position is detected by the input detection unit 6 and input to the arithmetic processing unit 9 of the data processing unit 4.

Further, the finger 11 is illuminated from below the fingerprint printing base 1 by the light source 2 and the reflected light is incident on the camera 3 to image the fingerprint. In this case, the matrix switch plate 5 is interposed between the finger 11 and the finger 11, but since it is similar to the transparent elastic film of the conventional example, the imprinted fingerprint can be imaged by the camera 3. Then, this captured image signal is input to the data processing unit 4.

The data processing unit 4 performs AD conversion in the image input unit 8, converts it into multi-valued image data capable of displaying 256 gradations with an 8-bit structure, and inputs it to the arithmetic processing unit 9 for fingerprint registration. At this time, an image including feature points is registered in the registration unit 10 by binarization processing, thinning processing, feature point extraction processing, or the like. Further, at the time of fingerprint collation, the imprinted fingerprint image and the registered fingerprint image are collated. Further, it is possible to display operation guidance, an imprinted fingerprint image, etc. on the display unit 7 as in the conventional example.

FIG. 2 is an explanatory diagram of the input detection unit according to the embodiment of the present invention. 5 is a matrix switch plate, 20 is a template, 21 is an X electrode detection unit, 22 is a Y electrode scanning unit,
Reference numeral 23 is a counter, and 24 is a data transmission processing unit. The matrix switch plate 5 includes a plurality of electrodes X1 to X indicated by dotted lines.
16 and the electrodes Y1 to Y12 are orthogonally arranged, and at each intersection of the electrodes, the electrodes are opposed to each other via a space or a conductive anisotropic rubber, and the transparent elastic film supports the X and Y electrodes. ,
The X and Y electrodes at the intersecting points are brought into direct contact with each other by pressing, or the resistance of the conductive anisotropic rubber becomes close to zero, so that the contact state can be obtained. The X and Y electrodes are IT
A transparent electrode such as O is used, or an ultrafine wire is used so that it is not captured by a camera.

The counter 23 also includes a data transmission processing unit 24.
The Y electrode scanning unit 22 includes a decoder, decodes the count contents Q0 to Q3, and sequentially applies the scanning signals to the electrodes Y1 to Y12. Further, the X electrode detection unit 21 includes electrodes X1 to X1.
The scanning signal output from X16 is detected.
Further, the template 20 is removable, and is always removed. Therefore, in appearance, it is not possible to predict whether or not the input operation of the ID number or the like is required.

Then, the template 20 is placed on the matrix switch plate 5 provided on the fingerprint printing table, and "0" to "9", "*", displayed on the template 20 are displayed.
When, for example, "1" of "#" is pressed, a plurality of intersections of the X and Y electrodes corresponding to the pressed area are brought into contact with each other. For example, assuming that the intersections of the electrodes Y2, Y3 and the electrodes X2, X3, X4 are in contact with each other, when a scanning signal is applied from the Y electrode scanning unit 22 to the electrode Y1, the X electrode detection unit 21
The scanning signal cannot be detected from the electrodes X1 to X16, but when the scanning signal is applied to the electrode Y2, the electrodes X2, X3, and X4.
The scanning signal can be detected from Next electrode Y3
Even when the scanning signal is applied to the electrodes, the scanning signal can be detected from the electrodes X2, X3, and X4. Therefore, the data transmission processing unit 24 selects the pressed area from (X2, Y2) to (X2).
4, Y3) can be identified.

In the data transmission processing unit 24 or the arithmetic processing unit 9 (see FIG. 1) that has transferred the above-mentioned pressed area information,
When it is detected that all or any one or a plurality of intersections in the area (X1, Y1) to (X4, Y4) are in contact with each other, it can be determined that the numeral “1” is pressed. . Further, when it is detected that all or any one or a plurality of intersections in the area (X1, Y5) to (X4, Y8) are in contact with each other, it can be determined that the numeral "2" is pressed. . Similarly, with respect to the other input points of the template 20, it is possible to determine what has been pushed. Therefore, an input operation unit similar to a numeric keypad can be configured in the fingerprint imprinting unit. Further, the case where the X and Y electrodes are arranged orthogonally so as to have a plurality of intersections corresponding to each input point of the template 20 is shown, but one intersection is arranged corresponding to each input point. It is also possible to arrange the X and Y electrodes with a large pitch.

When the template 20 is removed and a finger is placed on the matrix switch plate 5 as indicated by the thick dotted line and pressed, the intersections of the electrodes Y4 to Y9 and the electrodes X6 to X16 are brought into contact with each other. Therefore, when a scanning signal is sequentially applied from the Y electrode scanning unit 22 to the electrodes Y1 to Y12, the electrode Y4
.. to Y9, scanning signals can be detected from the electrodes X6 to X16. As a result, the pressed area can be identified, so in the processing of the fingerprint image,
The image data in the pressed area can be processed well, and erroneous processing due to noise components in the periphery can be prevented.

FIG. 3 is an explanatory view of another embodiment of the present invention. FIG. 3A shows a state in which the finger 32 is placed on the imprinting surface of the fingerprint imprinting base 31 and the template 30 is removed. Is not found to have an input operation unit such as a numeric keypad. In addition, since the handling of the template 30 is known to those who can operate the fingerprint input device in advance,
As shown in (B), the template 30 is placed on a part of the imprinting surface of the fingerprint imprinting base 31.

Further, FIG. 3C shows the case where the matrix switch plate is provided on the entire surface of the stamping surface, and has the electrodes arranged orthogonally as shown by the dotted line. By mounting the template 30, it becomes possible to input an ID number, a personal identification number, and the like, similarly to the ten-key pad.
After this input operation, by placing and pressing the finger 32, the pressed area can be identified by the matrix switch plate.

FIG. 3D shows the case where the matrix switch plate in the region where the template 30 is placed is used, and the whole is made of a transparent elastic film, but the electrodes arranged orthogonally are shown by dotted lines. As described above, the case where the template 30 is formed only in the area on which the template 30 is placed is shown. In this case, for example, by placing and pressing the finger 32 of the left hand and sequentially pressing the input points of the template 30 by the finger of the right hand,
It is also possible to enter an ID number, a personal identification number, or the like.

FIG. 4 is an explanatory view of still another embodiment of the present invention. FIG. 4A shows three fingers 4 on the imprinting surface of the fingerprint imprinting base.
2, 43 and 45 are placed and the template 40 is placed on the upper side. The template 40 is removable. Further, the embossing surface can be configured so that five fingers can be placed on it.

Further, FIG. 4B shows a case where a matrix switch plate having electrodes arranged orthogonally as shown by a dotted line is provided on the entire surface of the imprinting surface, on which the template 40 is placed and an ID number, a personal identification number or the like. By inputting and then placing and pressing a plurality of fingers as illustrated, a plurality of fingerprints can be simultaneously taken. In that case, since the pressing area of each finger can be detected by using the matrix switch plate, even if the wide pressing surface is imaged by the camera, the fingerprint image can be easily searched.

Further, FIG. 4C shows a case where a matrix switch plate in which electrodes shown by dotted lines are arranged orthogonally is provided only in the region where the template 40 is placed. In this case, even when a finger is placed. It is possible to input an ID number, a personal identification number or the like by pressing the template 40 corresponding to the input point.

Further, in each of the above-described embodiments, the case where the template is placed on the matrix switch plate when the ID number and the personal identification number are input is shown. Since the input point can be stored, the input operation can be performed without placing the template.

Further, in the input detection section 6 or the arithmetic processing section 9, it is possible to switch between a data input mode for inputting an ID number, a personal identification number, etc. and a fingerprint image pickup mode for picking up an imprinted fingerprint. For example, in the data input mode,
It is possible to automatically switch from the data input mode to the fingerprint image pickup mode by pressing and inputting an ID number, a personal identification number or the like according to the input point of the template and pressing the # button. Then, in the data input mode, the input numeral or the like can be determined based on the information of the intersection of the contact states by the matrix switch plate 5, and in the fingerprint imaging mode, the imprinting area can be determined.

[0029]

As described above, according to the present invention, the transparent matrix switch plate 5 is provided on the fingerprint imprinting base 1 so that the intersections of the orthogonally arranged electrodes are brought into contact with each other by pressing. , The input detection unit 6 for detecting the pressed position of the input points such as the numbers “0” to “9” of the removable template and inputting it to the data processing unit 4 should be removed. As a result, since the existence of the input operation unit cannot be identified, an outsider cannot perform the fingerprint input operation for fingerprint collation, and the reliability can be improved. Further, since it is not necessary to provide an input operation section such as a ten-key pad separately from the fingerprint printing stand 1, there is an advantage that the arrangement space can be reduced. Further, when the fingerprint pressing area is detected by the matrix switch plate 5, only the fingerprint image in the pressing area needs to be processed, so that there is an advantage that the processing speed can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an input detection unit according to the embodiment of this invention.

FIG. 3 is an explanatory diagram of another embodiment of the present invention.

FIG. 4 is an explanatory diagram of still another embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 Fingerprint Printing Platform 2 Light Source 3 Camera 4 Data Processing Section 5 Matrix Switch Board 6 Input Detection Section 7 Display Section 8 Image Input Section 9 Arithmetic Processing Section 10 Registration Section

Claims (4)

[Claims] 1. A fingerprint imprinting base, a light source for illuminating an imprinted fingerprint on the fingerprint imprinting base, a camera for imaging the imprinted fingerprint illuminated by the light source, and data for processing an image pickup signal by the camera. In a fingerprint input device including a processing unit, a transparent matrix switch plate whose intersections are brought into contact with each other by pressing is provided on the fingerprint printing platform, and an input point by a removable template is provided on the matrix switch plate. The fingerprint input device is provided with an input detection unit that detects the pressed position of the matrix switch plate by the intersection position of the contact state of the matrix switch plate and inputs the detected position to the data processing unit. 2. The fingerprint switch area information is provided by providing the matrix switch plate in a fingerprint print area of the fingerprint print stand, and the input detection unit detects a contact point position of the contact state of the matrix switch board during fingerprint print. As the input to the data processing unit, and at the time of input by the template, the intersection point position of the contact state of the matrix switch plate is input to the data processing unit as the pressing position information of the input point by the template. The fingerprint input device according to claim 1. 3. The matrix switch plate is provided at a position adjacent to a fingerprint printing area of the fingerprint printing base, and a pressing position of an input point of a removable template on the matrix switch plate is a contact state of the matrix switch plate. 2. The fingerprint input device according to claim 1, further comprising an input detection unit that detects the intersection point position of and input data to the data processing unit. 4. The matrix switch plate has a structure in which the orthogonal electrodes are supported by a transparent elastic film so that the intersections of a plurality of orthogonal electrodes are always in an insulating state and are brought into contact with each other by pressing. Then, the input detection unit sequentially applies a scanning signal to one of the orthogonal electrodes, detects the scanning signal derived to the other through an intersection of contact states, and detects the pressing position of the matrix switch plate. The fingerprint input device according to any one of claims 1 to 3, wherein the fingerprint input device has a configuration for detecting.