JP2018097603A - Self-checkout device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-checkout device that allows a shopper to perform a reading operation while looking at the position of a barcode on a commodity.SOLUTION: A self-checkout device 1 is includes: an imaging unit 322 which is positioned so that its imaging direction is down-facing and captures an image of a commodity from above; a second display unit 34 for displaying an image of the commodity captured by the imaging unit 322; a barcode detecting unit 332 for detecting a barcode attached to the commodity from the captured image of the commodity; and a barcode reading unit 334 for reading the detected barcode.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a mechanism for facilitating barcode reading in a self-checkout device.

  In recent years, shops that introduce a self-checkout device (also referred to as a self-checkout product registration terminal or a self-checkout terminal) that allows a shopper to read a barcode attached to a product with a scanner and perform payment processing from the product registration. Has increased.

  In the self-checkout device, the shopper reads the bar code of the merchandise with the fixed scanner so that the bar code of the merchandise is put into the reading window of the fixed scanner. Handy scanners are often not used in self-checkout devices because one hand is blocked and it is difficult for shoppers to operate. In the self-checkout device, since a shopper performs a barcode reading operation, various methods for making the reading operation easy or reliable have been proposed.

  For example, Patent Document 1 proposes a self-checkout device that moves a fixed scanner up and down according to height because it is difficult for a shopper to reach a fixed scanner when the shopper is a short child.

JP 2006-115151 A

  When trying to read a barcode of a product through a reading window of a fixed scanner, the barcode is in a position that cannot be seen by a shopper. Since the shopper performs the reading operation in a state in which the barcode is not visible, it is difficult to perform the reading operation smoothly particularly for a large product in which the position of the barcode is difficult to understand. A shopper may perform reading operations many times while changing the height and angle of the product, and the shopper spends wasted time.

  In view of the above problems, an object of the present invention is to provide a self-checkout device in which a shopper can perform a reading operation while confirming the position of a barcode of a product.

  In order to achieve the above object, a self-checkout device is arranged so that the shooting direction is downward, and a camera for shooting a product from above, a display unit for displaying an image of the product shot by the camera, A product identification code detector for detecting a product identification code attached to the product from the photographed product image, and a product identification code reader for reading the detected product identification code.

  According to the present invention, it is possible to provide a self-checkout device in which a shopper can perform a reading operation while looking at a bar code position of a product.

1 is an external view of a self-checkout device according to an embodiment of the present invention. It is a hardware structural example of a self-checkout apparatus. It is a functional block diagram of a raising / lowering scanner apparatus. It is a hardware block diagram of a raising / lowering scanner control part. It is a figure which shows the structural example of the raising / lowering mechanism of a camera raising / lowering part. It is a figure which shows the example of the position of the barcode stuck on goods. It is a flowchart explaining the procedure of a barcode reading process. It is an example of a product image. It is an example of a product registration screen.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a self-checkout apparatus 1 according to an embodiment of the present invention.

  The self-checkout device 1 has a housing 11 and a housing 12. The housing 11 and the housing 12 accommodate a control device (not shown) that controls the self-checkout device 1 as a whole, a communication device (not shown) that communicates with the outside, a power supply device (not shown), and the like.

  The housing 11 includes a first display unit 13, an input unit 14, a card R / W 15, a fixed scanner 16, a receipt printer 17, a shopping basket mounting table 18, and a money handling device storage unit 20. Moreover, the housing | casing 11 is provided with the raising / lowering scanner apparatus 300 (not shown in FIG. 1). The housing 12 includes a shopping bag suspension part 27 and a weight measuring device (total weight weighing scale) 28 in the upper part.

  The first display unit 13 displays information related to shopping. The first display unit 13 is configured by, for example, an LCD (Liquid Crystal Display). The first display unit 13 displays operation guidance, operation menu display, product registration screen, and the like of the self-checkout device 1. The product registration screen displays information such as the product name, product unit price, product weight, and other information associated with the settlement of the product, the deposit amount at the time of settlement, the total amount of shopping, the amount of change, and the like. In the following, a one-dimensional barcode is shown as an example of a barcode, but a two-dimensional barcode such as a QR code (registered trademark) may naturally be used. The bar code is also called a product identification code.

  The input unit 14 receives an input from a shopper according to the display on the first display unit 13. The input unit 14 is, for example, a touch panel. The card R / W 15 reads information recorded on the magnetic stripe of a magnetic card (for example, a credit card).

  The fixed scanner 16 is fixed to the housing 11 and reads a barcode attached to a product. The receipt printer 17 prints and outputs a receipt in which information such as the purchased product name, product unit price, deposit amount, and change amount is described. The shopping cart placing table 18 is provided on the side opposite to the approaching direction of the shopper at the time of product checkout.

  The money handling device accommodating portion 20 accommodates a bill machine (not shown) and a change machine (coin handling device) (not shown) inside. The money handling apparatus accommodating portion 20 includes a bill insertion slot 21, a bill withdrawal slot 22, a coin slot 23, a coin return slot 24, and a coin withdrawal slot 25 on the outside serving as an operation surface for a shopper.

  The banknote insertion slot 21 is a banknote insertion slot for depositing money into the fishing bill machine. The banknote withdrawal port 22 is an outlet for taking out banknotes withdrawn from the bill machine. The coin slot 23 is a slot for coins to be deposited into the change machine. The coin return port 24 is a port for taking out coins returned from the change machine. The coin dispensing port 25 is a coin dispensing port for dispensing from the change machine.

  A second display unit 34 and a camera scanner 320 (not shown in FIG. 1) are attached to the table 32. The camera scanner 320 captures a product and a bar code attached to the product. The camera scanner 320 is attached to the second display unit 34.

  The second display unit 34 is attached to the top of the table 32 and allows the shopper to monitor the product image taken by the camera scanner 320. The second display unit 34 is configured by an LCD, for example. Note that the table 32 is also referred to as an attachment portion because it attaches the imaging unit 322 (not shown in FIG. 1) and the second display unit 34.

  The shopper puts the product on either the fixed scanner 16 or the camera scanner 320 on the table 32 and reads the barcode. By using the camera scanner 320 of the table 32, the shopper can perform a reading operation while confirming the position of the barcode of the product. The structure of the camera scanner 320 of the table 32 and the configuration of the reading function by the camera scanner 320 will be described in detail with reference to FIG.

  The plastic bag suspension unit 27 is used to suspend a plastic bag into which a product registered as a payment target is placed. The weight measuring device 28 measures the total weight of products registered as products for payment.

  FIG. 2 is a hardware configuration example of the self-checkout apparatus 1. As shown in FIG. 2, the self-checkout device 1 includes a control device 100 and peripheral devices (devices) connected to the control device 100.

  The control device 100 includes a CPU 102, a temporary storage unit 104, a nonvolatile storage unit 106, a graphic processing device 108, an input / output IF 110, and a communication IF 112.

  A CPU (Central Processing Unit) 102 is a processor that comprehensively controls the self-checkout apparatus 1. The CPU 102 reads the control program, executes the control program, and performs product registration processing.

  The temporary storage unit 104 is, for example, a RAM (Random Access Memory), and temporarily stores an OS (Operating System) program, a part of an application program, and image data to be executed by the CPU 102.

  The nonvolatile storage unit 106 is, for example, an HDD (Hard Disk Drive) or flash memory, and stores application programs and table data executed by the CPU 102 in a nonvolatile manner.

  The graphic processing device 108 creates the operation guidance screen and the product registration screen described above in accordance with instructions from the CPU 102, converts them into image signals, and outputs them to the first display unit 13.

  An input / output IF (Interface) 110 controls peripheral devices such as the input unit 14 to be connected. Further, the input / output IF 110 may perform writing of information to an external storage medium (not shown) and extraction of information from the external storage medium.

  The communication IF (Interface) 112 transmits and receives data to and from the outside, and has a connection format such as a LAN (Local Area Network) or a USB (Universal Serial Bus).

  In addition to the input unit 14, card R / W 15, fixed scanner 16, receipt printer 17, and weight measuring device 28, the input / output IF (Interface) 110 includes a deposit / withdrawal device 40, an audio output device 42, and a lifting / lowering scanner device. 300 is connected. A temporary storage unit 104, a nonvolatile storage unit 106, and the like are connected to the CPU 102 via a bus 114.

  The deposit / withdrawal apparatus 40 includes the above-described fishing bill machine and change machine. The voice output device 42 outputs a necessary voice in a series of processes from product registration to payment. For example, the voice output device 42 outputs a voice guidance for prompting smooth product registration, or outputs a warning sound when there is an irregularity such as unregistered product.

  The lifting / lowering scanner device 300, together with the fixed scanner 16, reads a product barcode as a product identification code. The elevating scanner device 300 includes a table 32, a second display unit 34, and a camera scanner 320. The fixed scanner 16 is referred to as a first reading unit, and the elevation scanner device 300 is also referred to as a second reading unit.

  FIG. 3 is a functional block diagram of the elevation scanner device 300. The elevating scanner device 300 includes a table 32 (not shown in FIG. 3), a second display unit 34, an elevating scanner control unit 310, a camera scanner 320, an illumination unit 340, a camera elevating unit 350, and the like.

  The elevation scanner control unit 310 controls the second display unit 34, the camera scanner 320, the illumination unit 340, and the camera elevation unit 350. FIG. 4 is a hardware block diagram of the lift scanner control unit 310. The elevation scanner control unit 310 includes a CPU 402, a temporary storage unit 404, a nonvolatile storage unit 406, and a bus 410.

  The CPU 402 reads the control program, executes the control program, and controls the entire elevation scanner device 300. A camera scanner 320, an illumination unit 340, and a camera lifting / lowering unit 350 are connected to the CPU 402 via a bus 410. The temporary storage unit 404 and the non-volatile storage unit 406 have the same functions as the temporary storage unit 104 and the non-volatile storage unit 106 described above, and a description thereof will be omitted.

  Returning to FIG. The camera scanner 320 captures an image (product image) of a product that is deceived by a shopper, detects a barcode from the product image, and reads the barcode. The camera scanner 320 includes an imaging unit 322, an AE unit 324, an AF unit 326, an image processing unit 328, a product detection unit 330, a barcode detection unit 332, and a barcode reading unit 334.

  The imaging unit 322 has a two-dimensional imaging element such as a lens or a CMOS, and outputs image data of a photographed product. The imaging unit 322 is arranged at the bottom of the table 32 so that the shooting direction is downward, and images the product from above. Note that the imaging unit 322 is also simply referred to as a camera.

  The AE unit 324 controls the exposure time of the imaging unit 322 so as to achieve proper exposure. The AF unit 326 controls the lens of the imaging unit 322 to the in-focus position.

  The image processing unit 328 performs image processing for display on the image data and outputs it to the second display unit 34. Further, the image processing unit 328 performs predetermined processing (for example, monochrome processing) on the image data and outputs the processed image data to the product detection unit 330.

The product detection unit 330 analyzes the image data and detects whether any product exists in the image.
When a product is detected by the product detection unit 330, the barcode detection unit 332 detects whether a barcode is present in the detected product image area.

  Specifically, the barcode detection unit 332 divides the image data into areas of a predetermined size and detects whether there is a pattern corresponding to the barcode for each area. The size of the area is set according to the height of the table. If the height of the table is low, the size of the bar code to be shot increases, so the area size is set large. On the other hand, when the height of the table is high, the area size is set to be small because the size of the barcode to be photographed is small. Accordingly, when the height of the table is increased, the total number of areas to be processed is increased as compared with the case where the table is low, so that the time required for barcode detection is also increased. The bar code detection unit 332 is also referred to as a product identification code detection unit.

  When the barcode detection unit 332 detects a barcode, the barcode reading unit 334 reads the detected barcode and converts (decodes) the read barcode into a predetermined code. The converted barcode data is transmitted to the control device 100. The barcode reading unit 334 is also called a product identification code reading unit.

  The illumination unit 340 is, for example, an LED that illuminates a product photographed by the camera scanner 320. Illumination of the illumination unit 340 is adjusted by the elevation scanner control unit 310 according to the luminance of the image data. The illumination unit 340 is disposed at the bottom of the table 32, similarly to the imaging unit 322.

  The camera lifting / lowering unit 350 includes a lifting / lowering motor 352 and a position sensor 354. The elevating motor 352 is a drive source for moving the table 32 attached to the bottom of the imaging unit 322 up and down. The position sensor 354 is a sensor that detects the position of the table 32. The position sensor 354 detects the standard position, upper limit position, or lower limit position of the table 32. The lift scanner controller 310 controls the lift motor 352 based on the detected position data.

  FIG. 5 is a diagram illustrating a configuration example of an elevating mechanism of the camera elevating unit 350. FIG. 5 is a cross-sectional view of the self-checkout device 1 shown in FIG. 1 as viewed from the left side direction. The camera elevating unit 350 further includes an elevating gear 356, a rack 358, and the like as an elevating mechanism.

  The elevating gear 356 transmits the rotation of the elevating motor 352 to the rack 358 and is attached to engage with the elevating motor 352 and the rack 358.

  The rack 358 is attached to the inside of the housing 11 so as to be movable up and down. The rack 358 moves up and down according to the rotation direction and the rotation amount of the elevating motor 352. The table 32 is attached to the rack 358 directly or through an appropriate transmission system. The table 32 moves up and down integrally with the rack 358.

  As described above, the imaging unit 322 images the product G from above with the shooting direction arranged downward. The product G is placed in the shooting range 322a by the shopper. An imaging range 322a of the imaging unit 322 is illuminated by an illumination unit 340 (not shown in FIG. 5).

  With such a configuration, the table 32 is raised or lowered with respect to the housing 11 according to the rotation direction and the rotation amount of the lifting motor 352 controlled by the lifting scanner control unit 310. Then, the position of the imaging unit 322 of the camera scanner 320 moves up and down in response to the rising or lowering of the table 32.

  Since the imaging unit 322 moves away from the product G due to the rise of the table 32, the shooting range is widened, and the size of the product G in the screen is reduced. On the contrary, when the table 32 is lowered, the imaging unit 322 approaches the product G, so the shooting range is narrowed and the size of the product G on the screen is increased.

  The elevation scanner control unit 310 drives the elevation motor 352 to detect a signal from the position sensor 354 and control the height of the imaging unit 322. When the barcode detection unit 332 does not detect a barcode, the elevation scanner control unit 310 increases the height of the imaging unit 322 to widen the shooting range, and controls the barcode to be included in the shooting range.

  Returning to FIG. The control device 100 is provided with a product registration unit 120. The product registration unit 120 performs product registration processing using the barcode acquired by the fixed scanner 16 or the camera scanner 320. The product registration unit 120 is a functional unit realized by the CPU 102 that has read the control program.

  The barcode data read by the fixed scanner 16 or the barcode reading unit 334 is transmitted to the product registration unit 120. The product registration unit 120 reads the corresponding product name, price, and other information from the read barcode data from the nonvolatile storage unit 106, specifies the product name, price, etc., and performs product registration processing. .

  The merchandise registration unit 120 outputs information related to the merchandise, a deposit amount, and the like to the graphic processing device 108. The graphic processing device 108 creates a product registration screen based on information related to the product, a deposit amount, and the like, and outputs the product registration screen to the first display unit 13.

  FIG. 6 is a diagram illustrating an example of the position of the barcode attached to the product. In general, the barcode B is often affixed to the back surface of the product G as shown by G2 and G3, not the front surface of the product G as shown by G1. There is also a product (product G2) in which the barcode B is affixed to the end, and a product (product G3) in which the barcode B is affixed in the center. There are various positions of barcodes attached to products.

  As described above, when the barcode reading operation is performed by the fixed scanner 16, the barcode is positioned on the back side as viewed from the shopper. Since the shopper places the product on the fixed scanner 16 in a state where the barcode is not visible, it becomes difficult to accurately place the barcode on the window of the fixed scanner 16 when the product is a large product.

  On the other hand, in the lifting / lowering scanner device 300, the imaging unit 322 of the camera scanner 320 takes an image of the product from above. Accordingly, the shopper can pick up the product on the camera scanner 320 while confirming that the barcode is on the screen on the second display unit 34. Shoppers can also view the barcode directly from an angle.

  FIG. 7 is a flowchart for explaining the procedure of commodity barcode reading processing in the self-checkout apparatus 1.

  The shopper determines whether there is a product in the basket (step S10). If the shopper determines that there is no product in the basket, that is, that the registration of the purchased product has been completed (No in step S10), the shopper performs an accounting process. The accounting process is performed, for example, by pressing the “¥ payment” button P3 on the product registration screen P shown in FIG. The description of FIG. 9 will be described later. When the accounting process is performed and the table 32 is not in the standard position, the elevation scanner control unit 310 returns the table 32 to the standard position. The standard position is a position having a height suitable for reading a commodity having a general size.

  When the shopper determines that there is a product in the basket (Yes in step S10), the shopper takes out the product from the basket (step S12). The shopper picks out the extracted goods to either the fixed scanner 16 or the camera scanner 320.

  The lift scanner control unit 310 determines whether or not a product is detected by the camera scanner 320 (step S14). Specifically, the elevation scanner control unit 310 determines whether the product detection unit 330 has detected a product from the image data acquired by the imaging unit 322.

  When the lift scanner control unit 310 determines that the product is detected by the camera scanner 320 (Yes in step S14), the lift scanner control unit 310 displays a captured image including the product on the second display unit 34 (step S16).

  FIG. 8 is an example of a product image displayed on the second display unit 34. The screen 34a in FIG. 8 is a screen in a non-display state in which no product is placed under the table 32. When a product is not detected, the screen may be blacked out (non-display state), or the imaged mounting table may be displayed on the screen as it is. The screen 34 b and the screen 34 c in FIG. 8 are screens in a state where a box-shaped product is placed under the table 32.

  The photographed product image may be displayed not on the second display unit 34 but on the first display unit 13. This is because it is only necessary to be able to confirm the barcode of the product photographed by the shopper on any display unit.

  The barcode detection unit 332 detects the barcode attached to the product from the photographed product image. The elevation scanner control unit 310 determines whether the barcode detection unit 332 has detected a barcode (step S18). For example, in the screen 34b of FIG. 8, since the entire barcode is not photographed, the elevation scanner control unit 310 determines that the barcode detection unit 332 has not detected the barcode.

  When the elevation scanner control unit 310 determines that the barcode detection unit 332 has not detected a barcode (No in step S18), the elevation scanner control unit 310 determines whether the table 32 is currently at the top ( Step S20). The uppermost part is the maximum position where the table 32 can be raised. The lift scanner control unit 310 determines whether the table 32 has reached the top by the signal from the position sensor 354.

  If the elevation scanner control unit 310 determines that the table 32 is not at the top (No in step S20), the elevation scanner control unit 310 raises the table 32 (step S22). The elevation scanner control unit 310 controls the camera elevation unit 350 to raise the table 32 by a predetermined height. The predetermined height is, for example, 10 cm. This is because the shooting range is expanded so that the barcode is included in the shooting range.

  More specifically, the lifting / lowering scanner control unit 310 stops the lifting / lowering motor 352 when a signal having a predetermined height is detected from the position sensor 354 after the start of lifting / lowering. When the table 32 is raised and the shooting range is expanded, the screen 34b in FIG. 8 is changed to the screen 34c, and the possibility that the entire barcode is within the shooting range is increased.

  If the table 32 is raised from the beginning to the top, the possibility of barcode detection increases, but as described above, the disadvantage of increasing the time for detecting the barcode occurs. Therefore, the position of the condition that balances the possibility of barcode detection and the detection time is set as the standard position, and the height of the table is moved to the standard position at the start of the accounting process.

  The process returns to step S18. The imaging range (area) of the product is expanded because the imaging unit 322 has moved away from the product by a predetermined amount. In step S <b> 18, the barcode detection unit 332 detects the barcode again based on the image whose shooting range is enlarged.

  On the other hand, when the elevation scanner control unit 310 determines that the table 32 is at the uppermost position due to the rise (Yes in step S20), a warning is displayed on the second display unit 34 or the first display unit 13 (step S24).

  Specifically, the lifting / lowering scanner control unit 310 issues a warning to the shopper because the barcode cannot be detected even when the table 32 reaches the top. The warning is, for example, “Product position is inappropriate. Please correct the product position and try again”. Moreover, the content which guides the movement direction of goods to a shopper as a warning may be sufficient. At the same time, the sound output device 42 may emit a warning sound or a warning sound. After the warning, the process returns to step S18, and the barcode detection unit 332 detects the barcode again.

  The process returns to step S18. When the elevation scanner control unit 310 determines that the barcode detection unit 332 has detected a barcode (Yes in step S18), the barcode reading unit 334 reads the barcode (step S26). The barcode data read by the barcode reading unit 334 is output to the product registration unit 120.

  The product registration unit 120 reads information such as the name and price of the corresponding product from the barcode data from the nonvolatile storage unit 106, and performs registration processing of the corresponding product. The graphic processing device 108 creates a product registration screen based on the product information that has been registered, and displays the read product information on the first display unit 13 (step S28).

  FIG. 9 is an example of a product registration screen P displayed on the first display unit 13. In the example of FIG. 9, product information P1 is displayed on the left side of the screen, and a product image captured by the camera scanner 320 is displayed on the right side of the screen. The product image is not displayed when the fixed scanner 16 is used. The “¥ payment” button P3 displayed below the product image is the accounting process button described in step S10. An accounting process (end of registration process) is performed by pressing the “¥ payment” button P3.

  At the time of the accounting process, the voice output device 42 may output an OK sound and add voice guidance for putting the product in the shopping bag. After step S28, the process returns to step S10. The shopper moves to the next product reading operation.

  The process returns to step S14. If it is determined that the product is not detected by the product detection unit 330 (No in step S14), and the product is trapped by the fixed scanner 16, the barcode is read by the fixed scanner 16 (step S14). S30). Then, the product registration unit 120 performs registration processing using the barcode read by the fixed scanner 16. The graphic processing device 108 creates a product registration screen and displays the read product information on the first display unit 13 (step S32). Steps S30 and S32 are the same processes as steps S26 and S28 described above.

<effect>
1) The self-checkout device 1 of the present embodiment includes a camera scanner 320 that captures a product from above and a second display unit 34 that displays the captured product image. Thereby, since the shopper can read the barcode while looking at the barcode attached to the product, the barcode reading operation can be quickly performed.

  2) Further, the self-checkout apparatus 1 includes a camera lifting / lowering unit 350 that lifts / lowers the imaging unit 322 of the camera scanner 320. If the barcode cannot be detected, the imaging unit 322 is raised to widen the shooting range, and a barcode located outside the shooting range is included in the shooting range. Thereby, the shopper can read the barcode without changing the position of the product.

  3) Normally, the imaging unit 322 is positioned at a standard position lower than the maximum height, and when the barcode cannot be detected, the imaging unit 322 is raised. As a result, it is possible to prevent the barcode detection speed from being constantly reduced.

<Other Examples>
In addition, the table 32 may be transparent to make it easy to see the product below. Further, instead of the table 32, the imaging unit 322 and the second display unit 34 may be attached to the arm. The arm makes it easier to see the product placed underneath.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, all the constituent elements shown in the embodiments may be appropriately combined. Furthermore, constituent elements over different embodiments may be appropriately combined. It goes without saying that various modifications and applications are possible without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Self-checkout apparatus 11 Case 12 Case 13 1st display part 14 Input part 16 Fixed scanner 32 Table 34 2nd display part 100 Control apparatus 102,402 CPU
104, 404 Temporary storage unit 106, 406 Non-volatile storage unit 108 Graphic processing device 120 Product registration unit 300 Lifting scanner device 310 Lifting scanner control unit 320 Camera scanner 322 Imaging unit 324 AE unit 326 AF unit 328 Image processing unit 330 Product detection unit 332 Bar code detection unit 334 Bar code reading unit 340 Illumination unit 350 Camera elevating unit 352 Elevating motor 354 Position sensor 356 Elevating gear 358 Rack

Claims (4)

A camera that is placed so that the shooting direction is downward, and the product is shot from above,
A display unit for displaying an image of a product photographed by the camera;
A product identification code detector that detects a product identification code attached to the product from the photographed product image;
A self-checkout device comprising: a product identification code reading unit that reads the detected product identification code. A camera elevating unit for elevating the camera up and down;
A control unit that controls the camera lifting and lowering unit to raise the camera and widen the shooting range when a product identification code is not detected from the captured product image by the product identification code detection unit; The self-checkout device according to claim 1, further comprising: An attachment part to which the camera and the display part are attached;
The self-checkout apparatus according to claim 2, wherein the camera elevating unit elevates and lowers the attachment unit up and down. In a control method in a self-checkout device including a camera for reading barcodes arranged to photograph a product from above and a camera lifting unit that lifts the camera up and down,
A photographing process for controlling the camera to photograph a product;
From the product image photographed by the camera in the photographing step, a detection step of detecting a product identification code attached to the product;
When a product identification code is detected in the detection step, a reading step for reading the detected product identification code;
When the product identification code is not detected in the detection step, the camera lifting and lowering unit is controlled to raise the camera to widen the photographing range of the product to be photographed, and to perform the photographing step and the detection step; The control method characterized by including these.