RU96268U1 - MOBILE DEVICE FOR READING INFORMATION FROM PERSONAL CERTIFICATES - Google Patents

Abstract

 1. A mobile device for reading information from identity documents, containing a housing, a groove for inputting a document, a document presence sensor, a central processing unit, a lighting controller, a lighting unit, an optical unit consisting of a lens, a mirror, light filters, a photodetector, an analog digital converters, a storage device, a display, a network port, a keyboard, characterized in that the photodetector is made in the form of a layered structure, each layer of which is made recording and luchenie certain range of wavelengths. ! 2. The device according to claim 1. characterized in that elements are added to the block of lighting elements to ensure that the document page is read in transmitted light.

Description

The invention relates to devices for automatically checking documents, namely, devices for reading, recognizing characters and images from machine-readable travel documents, followed by the transmission of recognized data via digital communication channels. A machine-readable travel document means, in accordance with GOST R52535.1-2006., ICAO 9303, ISO 7501 - an official document issued by a state or organization that is used by its owner to travel to different countries (for example: passport, visa, official identification document identity) and contains mandatory visual (read by the operator) data and special mandatory summary data, in a format that is machine readable, or an official identification card issued by the state or -organization, subject to machine-readable, which may be subject to agreement between the issuing State and the host State to serve as a passport or a visa for international travel.

Mobile devices for controlling machine readable documents are known and produced by various companies. The main requirements for such devices are to ensure high quality and reliability of reading images of both machine-readable data and requiring visual control, as well as the availability of reading means. information from contactless identification microcircuits (RFID microcircuits).

It is also known that for reliable reading of machine-readable lines in documents according to GOST R52535.1-2006 and ICAO 9303, a resolution of at least 300 DPI is required (http://www.metod-kopilka.ru/page-2-2-23.html ), and to control the zones of visual reading, a resolution corresponding to the quality of printing printing is required - more than 450 DPI, and it is also necessary to provide illumination and reading in the ultraviolet (UV) and infrared (IR) regions of the spectrum. In addition, visual data must be observed both in reflected light and in transmitted light.

Known mobile devices PR303 and PR501 of the company "Adaptive Recognition", Hungary (http://www.documentreader.net/products.htm). The portable device PR303 is a reader of a machine-readable line (MRZ) and RFID microcircuit of a document, has small overall dimensions (224 × 259 × 124 mm) and weight (about 2 kg). The PR501 device allows you to read the full image of a document in white, infrared and ultraviolet light with a resolution of up to 380 dpi, to recognize information from the machine-readable area of the document, determine the type of document and receive data from an RFID chip.

The disadvantages of the known devices is that the PR303 device allows you to read only a machine-readable line, and thus does not provide the input of the required visual image data identifying the owner of the document. The PR501 device provides the input of the page image, but the resolution of the device does not fully meet the above requirements for reading visual information, and the overall dimensions (470 × 357 × 176 mm) and weight (8 kg) make its use as a mobile device extremely inconvenient.

The well-known 83X3 mobile hardware-software complex manufactured by the Regula company, Republic of Belarus (http://www.regula.ws/index. Php? Ml = ru & id = 2). The device allows you to read document images in white, IR and UV light with a resolution of up to 250 dpi in 5 s (image of a whole page of a document), to recognize information from the machine-readable area of the document, determine the type of document and receive data from an RFID chip. Overall dimensions (when folded) 280x220x160 mm, weight, not more than 4 kg.

A disadvantage of the known device is also the low optical resolution of the device.

In addition, the disadvantages of all the known above-mentioned devices is that the photodetector for input and image recognition consists of a mosaic block of photosensitive elements with light filters in front of each element corresponding to the allocated spectral range from the RGB color space, and, thus, the image element containing color information , can be processed only by at least three spatially separated elements of the photodetector. Such a structure increases the area of the matrix, reduces the real resolution and image clarity. The Baer filter structure, usually used in mosaic photodetectors, reduces 2 times the sensitivity in green light and 4 times in red and blue compared to the equivalent size and resolution of the monochrome matrix and accordingly introduces interpolation distortions when recording objects with a size comparable to the size of a single photodetector photodetector. In addition, the presence of light filters emitting a narrow spectral zone reduces the spectral range of the received radiation, compared with the original monochrome version of the photodetector. Another disadvantage of the above devices is the lack in the devices of the module for reading the visual zone of the page of the document in transmitted light (in the light).

Known device Kiosk ePassport Reader company 3M which has a higher resolution compared to other counterparts, allowing you to receive full images of documents in various spectral lighting ranges with a resolution of up to 416 dpi, as well as AssureTec ID-450 with a resolution of up to 400 dpi. (Http : //www.assuretec.com/index.php/products/hardware-new/).

A disadvantage of the known device is that it is not mobile, but is designed to function as part of a stationary security system, while all the functions of recognizing MRZ, extracting a portrait and other objects from an image, interacting with a database are assigned to the control computer connected to the device USB wired interface.

A device is known for reading and recognizing machine-readable information, signs and images from identity documents, including a document groove, a document presence sensor, a central processing unit, a lighting controller, a lighting unit, an optical part, an array photodetector, analog-to-digital converters , storage device, display, network port and keyboard. (US patent US 6269169, priority 2001-07-31, IPC G06K 9/00 "Secure document reader and method therefore").

A disadvantage of the known device is that the matrix photodetector contained in the structure of the device is a charge-coupled device (CCD) organized in the form of a mosaic grid, each photosensitive element of which is covered by a filter that transmits radiation of only one color - red, green or blue. The disadvantages of the mosaic photodetector are - reduced 2 times the sensitivity in green light and 4 times in red and blue compared to the equivalent photodetector in size and resolution, and color interpolation distortions when registering the read image elements, the projection of which the optical part on the matrix photodetector is comparable to the size single photodetector matrix photodetector. In addition, the device does not contain means for reading pages of documents in transmitted light.

The authors were tasked with developing a device that allows you to read documents without losing color information while maintaining high sensitivity and resolution, which allows you to receive images with increased sharpness, without distortion and loss of small details or special characters.

The problem is solved in that a mobile device for reading information from identity documents containing a housing, a groove for inputting a document, a document presence sensor, a central processing unit, a light controller, a lighting unit, an optical unit consisting of a lens, a mirror, light filters, a photodetector , analog-to-digital converters, storage device, display, network port, keyboard, equipped with a photodetector with a layered structure, each layer of which is made reg Trier radiation certain range of wavelengths. In the proposed device, the increase in spatial, color and spectral resolution is ensured by the use of such a photodetector. Also, additional elements are introduced into the device in the block of lighting elements, which provide the image of the page on the photodetector in transmitted light.

The technical effect of the claimed technical solution lies in the fact that the claimed device can significantly increase the resolution and sensitivity when the size of the photodetector with a layered structure equal to the size of the photodetector with a mosaic structure due to the stack structure of single photodetectors and the absence of interpolation in the process of color restoration and, thus , reduce the amount of distortion of small image details and prevent loss of information when reading microfonts, special GOVERNMENTAL characters and fine detail visual area of the page. In addition, when using a photodetector with a layered structure comparable in resolution and sensitivity to a mosaic photodetector, it becomes possible to use a smaller and, accordingly, heavy optical part, which reduces the weight of the device. Another advantage of the claimed device is a wider range of perceived radiation, which allows you to recognize special characters emitting in a narrow spectral range when illuminated with a UV or IR light source.

The claimed technical solution is illustrated by the block diagram of the device shown in figure 1, where 1 is the claimed device, 2 is the passport, 3 is the groove, 4 is the block of lighting elements, 5 is the optical unit consisting of a lens, a mirror, filters, 6 - photodetector, 7 - by the read controller, 8 - programmable logic integrated circuit (FPGA), 9 - random access memory pre-storage image, 10 - interface with a digital signal processor (DSP), 11 - random access memory, 12 - central processing unit equipment (CPU), 13 - contactless identification reader, microcircuit, 14 - high-capacity storage device, 15 - RAM, 16 - information display device, 17 - keyboard and pointing device such as a mouse, 18 - network interface adapter, 19 - additional lighting elements.

The inventive device 1 for reading information from identity documents is intended for reading images of any documents, their recognition and authentication. The principle of operation of the inventive device can be explained by checking international passports and visa documents 2 (hereinafter passport).

Passport 2 contains a page on which data fields about the document and its owner are located: machine-readable zone (MZR) containing encoded information about the type of document, its number, last name, initials of the document owner and his citizenship; photo of the owner of the document; document number, date and place of issue, validity period; Information about the authority that issued the document. In addition, according to modern requirements, a contactless identification microcircuit should be built into international documents, which may contain information about the owner of the document, such as last name and first name, photo, fingerprints, etc.

The device contains a groove 3, transparent on both sides, into which the document 2 is placed. The size and shape of the groove 3 can vary depending on the purpose of the device 1 for installing documents other than passports.

To complicate the possibility of falsifying the passport of its page, including the data page, it contains various protection options, including elements visible in different spectral ranges, holograms, materials with different degrees of reflection depending on the angle of illumination, etc.

To obtain an image of a document in various lighting conditions, a block of lighting elements 4 is used, which can be located at different angles and at different distances both in front of the groove 3 for illuminating the front of the document page 2 installed there and behind it to register the image of the page in the light. The block of lighting elements 4 may contain sources of radiation of white, infrared, ultraviolet range, made using LEDs or discharge lamps with focusing or scattering elements or without them. Also, the block of lighting elements 4 may include additional lighting elements 19, which provide images of the page on the photodetector in transmitted light.

Reflected from the page of the document 2 or the light transmitted through it passes through the optical unit 5, which may contain a block of filters that cut out the necessary part of the spectral range of the illuminators, special optical components designed to equalize the radiation intensity, and a lens focusing the image on the surface of the photodetector 6.

The lighting element unit 4 and the photodetector 6 are connected to the readout controller 7. To implement the photodetector control and real-time preprocessing functions of the data stream, the controller 7 contains a programmable logic integrated circuit (FPGA) 8. For storing intermediate data, as well as calibration tables and image controller 7 contains a random access memory pre-storage image 9 connected to the FPGA 8. The FPGA 8 is connected by an interface to a digital signal processor ( SP) 10. The processed using the DSP image is placed in random access memory 11 coupled to the DSP 10.

The reader controller 7 via PCI, Ethernet or another interface is connected to a central processing unit (CPU) 12. The CPU is connected to a reader of contactless identification microcircuits 13. Also, the CPU is connected to RAM 15, a high-capacity storage device 14, an information display device 16, a keyboard and a mouse type mouse (or touchpad) 17, as well as a network interface adapter 18.

SUMMARY OF THE INVENTION

The claimed device operates as follows. When a document is detected using an additional camera detector or at the command of an operator, the device begins to read the image of the document page installed in the groove.

To do this, for a certain period of time, a block of lighting elements is turned on to illuminate the front of the document page set there. The reflected image of the document page falls into the optical node, with which the image is subjected to optical spectral filtering and focusing on the surface of the photodetector with a layer-by-layer structure for reading the image.

The lighting unit and photodetector are controlled, a document image is read and machine-readable information, characters and images are recognized, data is exchanged with a central processing unit by a read controller. To implement the functions of controlling the photodetector and real-time preprocessing of the data stream, a programmable logic integrated circuit (FPGA) is intended. To store the intermediate image data received from the photodetector, as well as calibration tables and images, the controller contains a random access memory device for preliminary storage of the image connected to the FPGA. The received and pre-processed image is transmitted to a digital signal processor (DSP) connected to the FPGA parallel or serial interface. The image lines processed by the DSP are sequentially placed in the random access memory.

Machine-readable information, characters and images recognized during image processing, as well as the entire page of a document are transmitted via standard PCI, Ethernet or another interface to the CPU, which encodes the recognized information from the machine-readable passport area (MZR) and uses it as a key for reading data using a contactless reader ID chip. Further, the data obtained from the image and from the contactless identification microcircuit are compared, based on the comparison, a conclusion is drawn about the possible authenticity of the document. In case of suspicion of a fake document, additional images of a document illuminated by IR, UV light can be read. The results of the operation of the device, such as an image of a document or its individual zones, information about recognized characters and images are stored in RAM and can be stored on a high-capacity storage device.

For the operator to make a decision, the display shows the results of the device’s operation, such as the validity or invalidity of the document, confirmation or non-confirmation of the identity of the owner of the document, results of verification of permission to the owner to travel with this document, image of the photo of the document owner read from the visual zone of the document and identification chip and other predefined data, as well as the results of verification of the document for authenticity. An external display can also be connected to the device. To provide the operator with the ability to manually enter information into the device, as well as facilitate the management of the device, a keyboard and a mouse (or touchpad) type manipulator are intended.

The network interface adapter can be used to connect the device to a local or global network or transferred for further processing or storage in an external database. This may be required to record the time and date of arrival or departure of the country, request information from the database for permission to enter or exit the owner of the document, or its presence on the wanted lists.

Claims (2)

1. A mobile device for reading information from identity documents, containing a housing, a groove for inputting a document, a document presence sensor, a central processing unit, a lighting controller, a lighting unit, an optical unit consisting of a lens, a mirror, light filters, a photodetector, an analog digital converters, a storage device, a display, a network port, a keyboard, characterized in that the photodetector is made in the form of a layered structure, each layer of which is made recording and luchenie certain range of wavelengths. 2. The device according to claim 1. characterized in that elements are added to the block of lighting elements to ensure reading of the document page in transmitted light.