JP2020042506A - Code display device, code reading device, code display method, and program - Google Patents

Abstract

To provide a code display device, a code reading device, a code display method, and a program, capable of better realizing reading codes.SOLUTION: A code display device (a terminal device 100) includes a display section 120, a distance measurement section 162, and a display control section 164. The display section displays a code image. The distance measurement section measures a distance between, a code reading device which reads information encoded in the code image from the code image displayed in the display section, and the display section. The display control section changes display modes of the code image to be displayed at the display section based on the distance measured by the distance measurement section.SELECTED DRAWING: Figure 2

Description

  Embodiments described herein relate generally to a code display device, a code reading device, a code display method, and a program.

  2. Description of the Related Art Conventionally, a technique is known in which an image such as a two-dimensional code in which various kinds of information necessary for passing through an automatic ticket gate is encoded and displayed on a display screen of a terminal device is used as a ticket. On the automatic ticket gate side, an image including a two-dimensional code displayed on the terminal device at the time of entry and exit of the user is captured by a camera, and various information is read by image analysis by a reading unit to determine whether or not passing is possible. Here, the reading performance of the two-dimensional code depends on the size of the two-dimensional code displayed on the terminal device and the distance from the camera, but the two-dimensional code displayed on the terminal device is displayed in a standard size. Therefore, if the two-dimensional code or the camera is not moved to an appropriate distance, a reading error may occur.

JP 2017-49970 A JP-A-2006-126450 JP 2005-61899 A

  The problem to be solved by the present invention is to provide a code display device, a code reading device, a code display method, and a program that can realize better code reading.

  The code display device according to the embodiment has a display unit, a distance measurement unit, and a display control unit. The display unit displays a code image. The distance measurement unit measures a distance between the code reading device that reads information encoded in the code image from the code image displayed on the display unit and the display unit. The display control unit changes a display mode of a code image displayed on the display unit based on the distance measured by the distance measurement unit.

The figure showing an example of composition of railroad use management system 1 of an embodiment. FIG. 2 is a diagram illustrating an example of a configuration of the terminal device 100 according to the embodiment. The figure which looked at the automatic ticket gate 200 of embodiment from above. The figure which looked at the reading part 211 of the automatic ticket gate 200 of embodiment from above. FIG. 2 is a diagram illustrating an example of a functional configuration of the automatic ticket gate 200 of the embodiment. FIG. 4 is an exemplary view for explaining processing of an application execution unit 160 according to the embodiment. FIG. 9 is a diagram for explaining a state in which the read image CD1 displayed on the display unit 120 of the terminal device 100 according to the embodiment is held over the reading unit 211 (231). FIG. 3 is a diagram illustrating an example of an image IM captured by an imaging unit according to the embodiment. FIG. 9 is an exemplary view for explaining processing of a display control unit 164 based on a distance d1 according to the embodiment. FIG. 9 is an exemplary view for explaining processing of the display control unit 164 when displaying in the third display mode of the embodiment. 5 is a flowchart illustrating an example of a flow of a series of processes performed by the terminal device 100 according to the embodiment.

  Hereinafter, a code display device, a code reading device, a code display method, and a program according to an embodiment will be described with reference to the drawings. In the following description, a terminal device is used as an example of a code display device, and an example in which a user who owns the terminal device uses a railway using a ticket displayed on the terminal device will be described.

  FIG. 1 is a diagram illustrating an example of a configuration of a railway use management system 1 according to the embodiment. The railway usage management system 1 is a system that manages entrance and exit at railway stations. The railway use management system 1 includes, for example, a terminal device 100, an automatic ticket gate 200, and a server device 300.

  The terminal device 100 is a portable terminal device used by a user. The terminal device 100 is, for example, a mobile phone such as a smartphone, a tablet terminal, a PDA (Personal Digital Assistant), or the like. The terminal device 100 is used as a medium held over the automatic ticket gate 200. That is, in the railway usage management system 1, the terminal device 100 is used as a ticket.

  On the screen of the terminal device 100, a read image CD1 for causing the terminal device 100 to function as a ticket is displayed. The read image CD1 is read by the automatic ticket gate 200 when the user passes through the automatic ticket gate 200. The read image CD1 includes, for example, an image for passing through the automatic ticket gate 200 at the station A and entering the station premises, and an image for passing through the automatic ticket gate 200 at the station B and exiting the station. Including.

  The read image CD1 is, for example, a two-dimensional code image such as a QR code (registered trademark) or a one-dimensional code image such as a bar code. These various code images are, for example, encoded information including validity information as a ticket and other information. The validity information includes, for example, validity period, identification information of an entrance station (departure station), a boardable section, code identification information (code ID) for identifying each of the read images CD1, and the like. It should be noted that the read image CD1 may be in any form as long as the content can be recognized by the automatic ticket gate 200 and the content cannot be recognized by a person.

  In addition, the terminal device 100 controls the display of the read image CD1 on the screen or the termination of the display of the read image CD1 based on an instruction from the user, a predetermined display timing, or the like.

  The automatic ticket gate 200 is provided, for example, at a ticket gate of a station. The automatic ticket gate 200 permits or prohibits the passage of the user by reading information from the read image CD1 displayed on the display screen of the terminal device 100. In the following description, the automatic ticket gate 200 is described as a device capable of processing only the read image CD1, but is not limited thereto. For example, the automatic ticket gate 200 may be a device capable of processing a traffic IC card, a magnetic ticket, a paper ticket on which a code image is printed, and the like in parallel.

  The server device 300 communicates with the automatic ticket gate 200 via a network including a LAN, a WAN (Wide Area Network), and the like, and manages the usage status of the automatic ticket gate 200 and the like. Further, the server device 300 performs various processes based on the information received from the automatic ticket gate 200.

Hereinafter, each function of the terminal device 100 and the automatic ticket gate 200 will be specifically described.
FIG. 2 is a diagram illustrating an example of a configuration of the terminal device 100 according to the embodiment. The terminal device 100 includes, for example, an operation unit 110, a display unit 120, an imaging unit 130, an audio output unit 140, a terminal-side communication unit 150, an application execution unit 160, and a terminal-side storage unit 170. These components are realized by executing a program (software) by a hardware processor such as a CPU (Central Processing Unit). Some or all of these components may be implemented by hardware (circuits) such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), and GPU (Graphics Processing Unit). (Including a circuitry), or may be realized by cooperation of software and hardware.

  The operation unit 110 is a user interface such as a button, a keyboard, a switch, a microphone, and a touch panel. When the display unit 120 is a touch panel, a part of the operation unit 110 is formed integrally with the display unit 120. The operation unit 110 receives, for example, an input operation by the user for displaying the read image CD1 on the display unit 120. In addition, the operation unit 110 may receive an operation of switching between display and non-display of the read image CD1.

  The display unit 120 includes a display device such as an LCD (Liquid Crystal Display) or an organic EL (Electroluminescence) display. The display unit 120 displays various images on a screen based on information output by the application execution unit 160 and the like.

  The imaging unit 130 is a digital camera using a solid-state imaging device such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging unit 130 captures an image of the front of the surface of the terminal device 100 on which the display unit 120 is attached, for example. The imaging unit 130 periodically and repeatedly captures an image, for example.

  The terminal side communication unit 150 communicates with the server device 300 via a cellular network mediated by a wireless base station (not shown), a Wi-Fi network, Bluetooth (registered trademark), a dedicated line, a provider, the Internet, or the like. Further, the terminal-side communication unit 150 may communicate with the automatic ticket gate 200 or another terminal device 100.

  The application execution unit 160 is realized by executing the ticket display application 172 stored in the terminal-side storage unit 170. The ticket display application 172 is, for example, an application program for causing the display unit 120 to display the read image CD1 as a ticket for using the railway through the automatic ticket gate 200 in a predetermined display mode. .

  The application execution unit 160 includes, for example, a distance measurement unit 162 and a display control unit 164. The distance measuring unit 162 measures a distance between the terminal unit 100 and a reading unit that reads the read image CD1 displayed on the terminal device 100 in the automatic ticket gate 200. The display control unit 164 displays the read image CD1 on the display unit 120 based on the area of the recognized predetermined mark in the image when the predetermined mark is recognized in the image captured by the imaging unit 130. To change. In addition, the application execution unit 160 may include a process of communicating with the server device 300 and purchasing a ticket for using a railway. Details of the function of the application execution unit 160 will be described later.

  The terminal-side storage unit 170 includes, for example, a nonvolatile storage medium such as a ROM (Read Only Memory), a flash memory, an HDD (Hard Disk Drive), and an SD card, and a volatile storage such as a RAM (Random Access Memory) and a register. This is realized by a storage medium. The terminal-side storage unit 170 stores, for example, a ticket display application 172 executed by the processor, image information 174, and other information. The image information 174 includes, for example, a read image, information displayed with the read image, and the like.

  Next, the automatic ticket gate 200 will be specifically described. FIG. 3 is a diagram of the automatic ticket gate 200 of the embodiment as viewed from above. The automatic ticket gate 200 may include, for example, a master unit 210 and a slave unit 230 that are arranged to face each other across a passage. The main machine 210 includes, for example, a reading unit 211, a top display unit 212, a front display unit 213, door units 214 and 215, and a ticket gate control unit 250. The slave device 230 includes a reading unit 231, a top display unit 232, a front display unit 233, and door units 234 and 235. The reading units 211 and 231 are examples of a “code reading device”.

  The reading unit 211 of the main device 210 captures the read image CD1 displayed by the terminal device 100 held by the user who is passing in the direction a shown in FIG. 3 and transmits the image data to the ticket gate control unit 250. I do.

  When the terminal device 100 is held over the reading unit 211, the top display unit 212 displays an image based on a result processed by the ticket gate control unit 250 or information received from the server device 300. The front display unit 213 displays a mark, a figure, a character, or the like indicating whether or not the vehicle can pass in the direction a shown in FIG. The display content of the front display unit 213 or the presence or absence of the display is determined by the ticket gate control unit 250.

  On the other hand, the reading unit 231 of the slave unit 230 captures the read image CD1 displayed on the terminal device 100 held by the user who is going to pass in the direction b shown in FIG. 250. When the terminal device 100 is held over the reading unit 231, the top display unit 232 displays an image based on a result processed by the ticket gate control unit 250 or information received from the server device 300. The front display unit 233 displays a mark, a figure, a character, or the like indicating whether or not the vehicle can pass in the direction b shown in FIG. The display content of the front display unit 233 or the presence or absence of the display is determined by the ticket gate control unit 250.

  When the automatic ticket gate 200 is set to the operation mode in which the user is allowed to pass in the direction a shown in FIG. 3, the ticket gate controller 250 keeps the doors 215 and 235 open, By controlling the doors 214 and 234 to be in the open state or the closed state, the passage of the user in the direction a is permitted or prohibited. In addition, when the automatic ticket gate 200 is set to the operation mode in which the user is allowed to pass in the direction b shown in FIG. 3, the ticket gate controller 250 keeps the doors 214 and 234 open. At the same time, by controlling the doors 215 and 235 to be in an open state or a closed state, the passage of the user in the direction b is permitted or prohibited.

  Further, the operation mode of the automatic ticket gate 200 may include an operation mode in which both the passage in the direction a and the passage in the direction b shown in FIG. 3 are permitted. In this case, the ticket gate control unit 250 controls the front display unit 213 and the front display unit 233 to display a mark, a graphic, a character, and the like indicating that the passage is permitted, if the user is not passing. I do. In addition, the ticket gate control unit 250, for example, when the user enters from either side of the a direction and the b direction, and the terminal device 100 is held over one of the reading unit 211 and the reading unit 231. The other reading unit is invalidated, and a mark, a figure, a character, or the like indicating that passage is prohibited is displayed on the display unit (the front display unit 213 or the front display unit 233) on the side where the user has not entered. Is performed.

  In addition, the automatic ticket gate 200 is not limited to a type that allows a user to pass in both directions, as described above, and includes a main unit and an auxiliary unit (slave unit) that allow a user to pass in only one direction. It may be.

  FIG. 4 is a diagram of the reading unit 211 of the automatic ticket gate 200 of the embodiment as viewed from above. The reading unit 211 includes, for example, a touch surface display unit PN1 and a camera CAM1. The surface of the touch surface display unit PN1 is an example of a “reading surface”. The touch surface display unit PN1 is, for example, an LCD or an organic EL display, and is arranged around the camera CAM1 when viewed from above. The camera CAM1 captures an image of an object held in front of the user (for example, above a reading surface) by the user. For example, when the user holds the terminal device 100 on which the read image CD1 is displayed on the display screen, the camera CAM1 captures an image of the surface of the terminal device 100 facing the camera CAM1 (for example, the display screen of the terminal device 100). I do. The camera CAM1 has, for example, an image sensor such as a CCD or a CMOS.

  The automatic ticket gate 200 is provided with a mark MK1 for the terminal device 100 to measure the distance from the reading surface of the reading unit 211. The mark MK1 is, for example, a color, a shape, or a character that can be distinguished from a surrounding color by image processing in the terminal device 100. The mark MK1 may be affixed to the reading surface of the reading unit 211 with a seal or the like, or may be formed on the reading surface. In addition, the mark MK1 may be a light emitter that can emit light of a predetermined color under the control of the automatic ticket gate 200. The mark MK1 is provided, for example, in a range that falls within the angle of view of the imaging unit 130 when the terminal device 100 is held over the reading unit 211. Details of the distance measurement using the mark MK1 will be described later.

  FIG. 5 is a diagram illustrating an example of a functional configuration of the automatic ticket gate 200 of the embodiment. The automatic ticket gate 200 has, in addition to the configuration shown in FIGS. 3 and 4, for example, a ticket gate communication unit 245 that communicates with an external device such as the server device 300 or the terminal device 100, and an instruction from the ticket gate control unit 250. And a wicket storage unit 270 for storing various information.

  The ticket gate control unit 250 includes, for example, a communication control unit 252, an image processing unit 254, a passability determination unit 256, and a pass control unit 258. Each of these components may be realized by a processor such as a CPU executing a program stored in the ticket gate storage unit 270. In addition, some or all of the components of the ticket gate control unit 250 may be realized by hardware such as an LSI, an ASIC, and an FPGA, and may have a circuit configuration for realizing each function. Further, some or all of the components of the ticket gate control unit 250 may be realized by cooperation of software and hardware.

  The ticket gate storage unit 270 may be realized by, for example, a nonvolatile storage medium such as a ROM, a flash memory, an HDD, and an SD card, and a volatile storage medium such as a RAM and a register. The ticket gate storage unit 270 stores a program executed by the processor, identification information of a station where the ticket gate is installed, image data and text data to be displayed on various display units, audio data to be output to the speaker 240, Stores a fare table, etc. The fare table is, for example, information in which a fare is associated with a section of a station.

  The communication control unit 252 uses the ticket gate side communication unit 245 to process the image processing unit 254, the time when the read image CD1 is held over the reading unit 211 (231), the identification information of the station where the own device is installed. And the like to the server device 300. Further, the communication control unit 252 may receive the information transmitted by the server device 300 using the ticket gate-side communication unit 245.

  The image processing unit 254 analyzes, for example, a portion of the read image CD1 in an image captured by the camera CAM1 of the reading unit 211 (231), acquires encoded sequence information, decodes the sequence information, decodes the bit sequence, etc. Is converted into electronic information recognizable by the computer represented by. The electronic information includes, for example, efficacy information.

  The passability determination unit 256 determines whether the user can pass based on the information acquired by the image processing unit 254.

  The passage control unit 258 performs control of permitting or prohibiting the passage of the user based on the determination result by the passability determination unit 256. For example, when the read image CD1 is not extracted by the image processing unit 254, or when the extracted read image CD1 is not decoded or the decoded result is invalid, the passage control unit 258 controls the passage of the user. I do. The passage control unit 258 determines the doors 214, 215, 234, 235, the speaker 240, the top display units 212, 232, the front display units 213, 233, the touch surface display unit PN1, Or control a combination of these. The configuration of the reading unit 211 shown in FIG. 5 may be similarly applied to the reading unit 231 of the slave device 230. That is, the reading unit 231 of the slave device 230 may be configured to include the touch surface display unit PN1 and the camera CAM1.

  Next, the function of the application execution unit 160 when the user passes through the automatic ticket gate 200 will be described in detail. FIG. 6 is a diagram for describing processing of the application execution unit 160 according to the embodiment. As shown in FIG. 6, the imaging unit 130 of the terminal device 100 is mounted on the same surface as the surface on which the screen of the display unit 120 is provided, above the screen area and on the left side of the center of the screen. It is assumed that

  The application execution unit 160 performs a predetermined operation (for example, an operation of tapping an icon on the screen associated with the ticket display application 172) by the user, and the ticket display application 172 stored in the terminal storage unit 170. Execute The application execution unit 160 refers to the image information 174 of the terminal-side storage unit 170 and, when there is a usable read image, causes the display unit 120 to display the read image. The available read image is, for example, a read image in which the boarding period of the effect information does not exceed the current date. When a plurality of read images are present in the image information 174, a list of effect information associated with the read image is displayed on the display unit 120, and the effect information corresponding to the effect information selected by the user from the displayed list is displayed. The attached read image may be displayed on the screen.

  In addition, when the read image does not exist in the image information 174, the application executing unit 160 may cause the display unit 120 to display inquiry information as to whether or not the user should perform a ticket purchase procedure. In this case, when receiving an instruction operation for performing a purchase procedure from the user through the operation unit 110, the application execution unit 160 accesses the server device 300 using the terminal-side communication unit 150 to perform the ticket purchase processing. It may be executed. For example, in the purchase process, the application execution unit 160 causes the display unit 120 to display an input screen for purchasing a ticket, and to display a boarding section (for example, an entry station, a departure station), a boarding period, a railway type, and a ticket purchase. An input such as a settlement method for such expenses is received. The application executing unit 160 downloads the read image corresponding to the purchased ticket based on the received information, stores the downloaded read image in the image information 174, and displays the read image on the display unit 120.

  In the example of FIG. 6, the display unit 120 includes, for example, an efficacy information display area A1, a read image display area A2, and a button display area A3. In the effect information display area A1 shown in FIG. 6, information on the boarding section (station A → station B) and the boarding period (May 25, 2018) are displayed. In the read image display area A2, a read image CD1 associated with the effect information is displayed. The application execution unit 160 displays the read image CD1 in a predetermined first display mode. The first display mode is, for example, a mode in which the read image CD1 is displayed at a first size (h1 in height and w1 in width) at the center of the read image display area A2 or the center of the screen of the display unit 120.

  In the button display area A3, an icon I1 for terminating the display of the efficacy information and the read image CD1 is displayed. The icon is, for example, a GUI (Graphical User Interface) switch associated with screen transition or execution of a predetermined process. The icon I1 is displayed by an image including a predetermined figure, color, pattern, and the like. Note that the application execution unit 160 may display only the read image display area A2 on the display screen of the ticket. In this case, when a predetermined time has elapsed since the read image CD1 was displayed, or when information indicating that the read image CD1 was read was received from the automatic ticket gate 200 side, the application execution unit A3 reads the read image The display of CD1 ends. In the following description, it is assumed that the entire screen of the display unit 120 is the read image display area A2.

  Next, a process of the application executing unit 160 when the user holds the read image CD1 over the reading unit 211 (231) will be described. FIG. 7 is a diagram illustrating a state in which the read image CD1 displayed on the display unit 120 of the terminal device 100 according to the embodiment is held over the reading unit 211 (231). The user causes the display unit 120 to display the read image CD1 corresponding to the ticket to pass through the automatic ticket gate 200, and causes the camera CAM1 to capture the displayed image. At this time, the distance measuring unit 162 causes the image capturing unit 130 of the terminal device 100 to capture an image including the mark MK1 provided on the upper surface S of the reading unit 211 (231).

  Here, the mark MK1 is a mark that can be read by the terminal device 100, and is provided, for example, on the reading surface of the reading unit 211 (231). As a more specific example, as shown in FIG. 4, the mark MK1 is located on the right side of the center C1 of the reading surface of the reading unit 211 (231) and at the back as viewed from the direction in which the user is going to pass. It is provided on the side. The reason why the mark MK1 is located on the right side of the center C1 of the reading surface is that the imaging unit 130 of the terminal device 100 is attached on the left side with respect to the display position of the read image CD1. Thus, when the user causes the reading unit 211 to read the read image CD1 displayed on the display unit 120, the display surface of the display unit 120 of the terminal device 100 faces the upper surface S as shown in FIG. Then, the mark MK1 is positioned at a position opposite to the position of the imaging unit 130. Therefore, the mark MK1 can be displayed near the center of the image captured by the imaging unit 130, and the distance can be measured with higher accuracy.

  FIG. 8 is a diagram illustrating an example of an image IM captured by the imaging unit 130 according to the embodiment. The distance measurement unit 162 performs pattern matching from the image IM1 using characteristic information such as a preset shape and color of the mark MK, and acquires an area occupied by the mark MK1 included in the image IM1. The area occupied by the mark MK1 is, for example, the number of pixels and position information. Further, the distance measuring unit 162 measures the distance d1 from the reading surface of the reading unit 211 based on the area occupied by the mark MK1.

  When the terminal device 100 is provided with a distance sensor, the distance measuring unit 162 may measure the distance d1 from the reading surface using the distance sensor. The distance sensor includes, for example, a light source (for example, an LED (Light Emitting Diode), a laser diode) and a light receiving element. In this case, the distance measurement unit 162 causes the light source of the distance sensor to irradiate light to the reading surface, and causes the light reflected by the reading surface to be received by the light receiving element. Further, the distance measuring unit 162 measures the distance d1 by calculating the reflected light using a predetermined evaluation calculation method. When the imaging unit 130 has an autofocus function, the distance measurement unit 162 may measure the distance d1 based on the focal length to the mark MK1 obtained by the autofocus function.

  Further, the distance measurement unit 162 may measure the inclination (angle) of the terminal device 100 with respect to the reading surface from the shape of the mark MK1 included in the image IM1 in addition to the distance d1 from the reading surface. Further, distance measuring section 162 may measure the relative direction of mark MK1 with respect to the current position of terminal device 100 from the position of mark MK1 included in image IM1.

  The display control unit 164 changes the display mode of the read image CD1 displayed on the display unit 120 based on the distance d1. FIG. 9 is a diagram for describing processing of the display control unit 164 based on the distance d1 according to the embodiment. When the distance d1 is equal to or more than the first threshold Th1, the display control unit 164 displays the read image CD1 in the read image display area A2 of the display unit 120 in a second display mode different from the above-described first display mode. Let it. The second display mode means that the read image CD1 is positioned at the center of the read image display area A2 or the center of the screen of the display unit 120, as shown in FIG. In this mode, the image is displayed in a large second size (height h2 (h2> h1), w2 width (w2> w1)). When the distance d1 is equal to or more than the first threshold Th1, the display control unit 164 increases the read image CD1 in proportion to the distance d1 instead of switching from the first display mode to the second display mode. It may be displayed. Accordingly, even when the user holds the terminal device 100 at a position distant from the reading surface, the read image CD1 can be read more favorably.

  When the distance d1 is less than the second threshold value Th2 (Th2 <Th1), the display control unit 164 displays the read image CD1 in a third display mode different from the first display mode and the second display mode. The image is displayed in the read image display area A2 of the display unit 120. FIG. 10 is a diagram for describing processing of the display control unit 164 when displaying in the third display mode of the embodiment. As a third display mode, the display control unit 164 sets the read image CD1 at a position set at random in the read image display area A2 or at a position set at random on the screen of the display unit 120. The image is displayed in a third size (h3 (h3 <h1) and w3 (w3 <w1)) smaller than the size (h1 and w1). In the example of FIG. 10, the same read images CD1a to CD1d of the third size are displayed at randomly set positions in the read image display area A2. As shown in FIG. 10, the display control unit 164 displays the plurality of read images CD1a to CD1d at randomly set positions, so that the distance d1 is too close to the read surface, and the read image display area A2 Even if only a part of the images can be imaged, at least one of the plurality of read images CD1a to CD1d can be satisfactorily read.

  Note that the display control unit 164 may simultaneously display a plurality of read images CD1a to CD1d, or may display any one of the images in order at predetermined time intervals. Further, when the relative direction of the mark MK1 is determined by the distance measuring unit 162, the display control unit 164 may display only the read image corresponding to the relative direction among the plurality of read images CD1a to CD1d.

  When the distance d1 is less than the second threshold Th2, the display control unit 164 reduces the read image CD1 in proportion to the distance d1 instead of switching from the first display mode to the third display mode. It may be displayed. Thereby, even when the user holds the terminal device 100 close to the reading surface, the read image CD1 can be read more favorably.

  When the distance d1 exceeds the preset upper limit value dmax or is less than the lower limit value dmin, the display control unit 164 may output information for causing the user to change the position of the terminal device 100. Specifically, when the distance d1 exceeds the upper limit value dmax, the display control unit 164 causes the voice output unit 140 to output a message such as “Please bring the terminal device closer to the reading surface”. In addition, when the distance d1 is less than the lower limit value dmin, the display control unit 164 causes the voice output unit 140 to output a voice message such as “Please separate the terminal device from the reading surface”.

  In addition, the display control unit 164 determines whether the terminal device 100 is tilted with respect to the reading surface by the distance measuring unit 162, and if the tilt is equal to or greater than the predetermined tilt, the voice output unit 140 outputs Please level the device. " In addition, when the distance measurement unit 162 determines the relative direction of the mark MK1 with respect to the current position of the terminal device 100 by the distance measurement unit 162, the display control unit 164 associates the mark MK1 with the relative direction and outputs the “terminal device” To the right (or to the left). " Accordingly, the user can adjust the position of the terminal device 100 according to the message, and can hold the terminal device 100 at a position where the reading unit 211 (231) can easily read the read image.

  The display control unit 164 may cause the display unit 120 to display the same sentence as the message instead of (or in addition to) the audio output described above, and a vibrator function that causes the terminal device 100 to generate a predetermined vibration is provided. When the terminal device 100 is provided, the terminal device 100 may be vibrated by a vibrator function.

  The display control unit 164 determines the read image CD1 in advance when the distance d1 cannot be measured by the distance measurement unit 162 or when the mark MK1 cannot be recognized from the image captured by the imaging unit 130. The display unit 120 causes the display unit 120 to display the image in the display mode (for example, the first display mode).

  Next, a flow of a series of processes performed by the terminal device 100 will be described. FIG. 11 is a flowchart illustrating an example of a flow of a series of processes performed by the terminal device 100 according to the embodiment. In the following processing, the display control processing of the read image by the terminal device 100 when passing through the automatic ticket gate 200 is shown. Further, it is assumed that the relationship of “dmax> Th1> Th2> dmin” is established between the following upper limit value dmax, lower limit value dmin, first threshold value Th1, and second threshold value Th2.

  First, when the application execution unit 160 receives a display instruction of the read image CD1 from the user and executes the ticket display application 172, the application execution unit 160 activates the image pickup unit 130 and reads the read image CD1 in the automatic ticket gate 200. The reading surface is imaged (step S100). Next, the distance measurement unit 162 measures the distance between the reading surface and the terminal device 100 from the captured image based on the mark MK1 provided on the reading surface (Step S102).

  Next, the distance measuring unit 162 determines whether or not the distance d1 between the reading surface and the terminal device 100 has been measured (Step S104). When the distance d1 has been measured, the application execution unit 160 determines whether the measured distance d1 exceeds the upper limit value dmax, or whether the distance d1 is less than the lower limit value dmin (step S106). If the measured distance d1 exceeds the upper limit value dmax or is less than the lower limit value dmin, the application execution unit 160 moves the terminal device 100 such that the distance d1 falls within the range from the lower limit value dmin to the upper limit value dmax. The message to be output is output by the audio output unit 140 (step S108), and the process returns to step S100.

  If the distance d1 has not been measured in the process of step S104, the display control unit 164 causes the display unit 120 to display the read image CD1 in the first display mode (step S110).

  Further, in the process of step S106, when the measured distance d1 does not exceed the upper limit value dmax and is not less than the lower limit value dmin, the display control unit 164 determines whether the distance d1 is equal to or more than the first threshold value Th1. (Step S112). If the distance d1 is equal to or greater than the first threshold Th1, the display control unit 164 causes the display unit 120 to display the read image CD1 in the second display mode (step S114).

  Further, in the processing of step S112, when the distance d1 is less than the first threshold Th1, the display control unit 164 determines whether the distance d1 is less than the second threshold Th2 (step S116). If the distance d1 is less than the second threshold Th2, the display control unit 164 causes the display unit 120 to display the read image CD1 in the third display mode (step S118). If the distance d1 is not less than the second threshold Th2 in the process of step S116, the read image CD1 is displayed on the display unit 120 in the first display mode (step S110).

  Next, the display control unit 164 determines whether a predetermined time has elapsed since the read image CD1 was displayed (Step S120). If the predetermined time has not elapsed since the read image CD1 was displayed, the process waits until the predetermined time has elapsed. When a predetermined time has elapsed since the display of the read image CD1, the display control unit 164 ends the display of the read image CD1 (step S122). Thus, the processing of this flowchart ends. In the process of step S120, for example, when an instruction to display the read image CD1 is received from the user, the display of the read image CD1 may be ended. In addition, in the processing of step S122, the application execution unit 160 may end the execution of the ticket display application 172.

  According to at least one embodiment described above, the display unit 120 for displaying a code image, the reading unit 211 (231) for reading information encoded in the code image from the code image displayed on the display unit 120, A distance measuring unit 162 for measuring a distance from the display unit 120, and a display control unit 164 for changing a display mode of a code image to be displayed on the display unit 120 based on the distance measured by the distance measuring unit 162. Thereby, it is possible to realize better code reading. Specifically, according to the embodiment, for example, a predetermined mark is provided on the code reading unit side, and the reading unit and the terminal device 100 are connected to each other based on the predetermined mark included in the image of the reading surface captured by the terminal device 100. By measuring the distance and increasing the code image when the distance is long, and reducing and displaying the code image when the distance is short, the readable range of the code image can be expanded. As a result, abnormal reading of a code image can be suppressed, and more excellent code reading can be realized.

(Modification of Embodiment)
Hereinafter, a modification of the embodiment will be described. In the above-described embodiment, one mark MK1 for measuring the distance is provided on the reading surface of the reading unit 211 (231), but a plurality of marks may be provided on the reading surface instead. In this case, the plurality of marks are arranged, for example, around the camera CAM1. In addition, the distance measuring unit 162 specifies one mark closest to the center of the image among a plurality of marks included in the image captured by the imaging unit 130, and measures the distance d1 based on the specified mark. . Accordingly, even when the position of the imaging unit 130 differs depending on the terminal device 100, the distance d1 can be measured with higher accuracy.

  Further, in the above-described embodiment, the read image corresponding to the ticket when using the railway has been described. However, the read image includes entry / exit management to facilities, user authentication, inventory management, retail management, data input, traceability, It may be a read image used for picking work or the like.

The above embodiment can be expressed as follows.
A display unit for displaying an image,
A reception unit for receiving information from the user,
A storage unit,
A hardware processor that executes a program stored in the storage unit,
In the storage unit, the hardware processor,
Displaying a code image on the display unit,
Measure the distance between the code reader and the display unit to read information encoded in the code image from the code image displayed on the display unit,
Based on the distance measured by the distance measurement unit, to change the display mode of the code image to be displayed on the display unit,
The program for executing the processing is stored,
Code display device.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Railroad use management system, 100 ... Terminal device, 110 ... Operation part, 120 ... Display part, 130 ... Imaging part, 140 ... Sound output part, 150 ... Terminal side communication part, 160 ... Application execution part, 162 ... Distance measurement Unit, 164: display control unit, 170: terminal storage unit, 172: ticket display application, 174: image information, 200: automatic ticket gate, 210: main machine, 230: slave machine, 211, 231: reading unit, 212 , 232: Top display unit, 250: Ticket gate control unit, PN1: Touch surface display unit, CAM1: Camera, 300: Server device

Claims (11)

A display for displaying a code image,
A distance measuring unit that measures a distance between the code reading device and the display unit that reads information encoded in the code image from the code image displayed on the display unit,
Based on the distance measured by the distance measurement unit, a display control unit that changes the display mode of the code image displayed on the display unit,
A code display device comprising: An image capturing unit for capturing an image is further provided,
The distance measurement unit, from the image captured by the imaging unit, extracts a predetermined mark provided in the code reading device, based on the area occupied by the extracted predetermined mark, the code reading device and the display unit, Measure the distance of
The code display device according to claim 1. The display mode includes at least one of a size, a number, a display position, or a display timing of the code image,
The code display device according to claim 1. The display control unit, when the distance between the code reading device and the display unit measured by the distance measurement unit is equal to or more than a first threshold, to display the code image of the display unit large,
The code display device according to claim 1. The display control unit, when the distance between the code reading device and the display unit measured by the distance measurement unit is less than a second threshold, to display the code image at a random position of the display unit,
The code display device according to claim 1. The display control unit, when the distance from the code reading device to the display unit can not be recognized by the distance measurement unit, the code image is displayed on the display unit in a predetermined display mode,
The code display device according to claim 1. The display control unit is configured to move the code display device to a user when the distance from the code reading device to the display unit exceeds the upper limit value or is smaller than the lower limit value by the distance measuring unit. Output the information of
The code display device according to claim 1. A reading unit that reads information encoded in the code image from the code image displayed on the display unit of the code display device,
A mark readable by the code display device is provided on a reading surface of the reading unit,
Code reader. The readable mark is provided on the right side of the center of the reading surface of the reading unit and on the back side,
The code reader according to claim 8. The computer of the code display device
Display the code image on the display,
Measure the distance between the code reader and the display unit to read information encoded in the code image from the code image displayed on the display unit,
Based on the measured distance, change the display mode of the code image to be displayed on the display unit,
Code display method. Code display device computer
Display the code image on the display,
A code reading device that reads information encoded in the code image from the code image displayed on the display unit and a distance between the display unit and the code reading device,
Based on the measured distance, to change the display mode of the code image to be displayed on the display unit,
program.

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