Product Management System

Abstract

This product management system uses indicators to detect when a product is not present on the product display surface, while minimizing its impact on store design. [Solution] The product management system comprises a camera 2 that photographs the product placement surface 10a, an indicator M placed on the product placement surface 10a and hidden by the product G, and a product detection unit that detects, based on the detection of the indicator M by the camera 2, that the product G corresponding to the detected indicator M is not present on the product placement surface 10a. The indicator M is made of a paint that includes invisible light reflective paint that reflects invisible light, and is transparent or has the same hue as the product placement surface 10a.

Description

Technical Field

[0001] The present invention relates to a product management system for managing the presence or absence of products displayed on a product placement surface of a product display fixture.

Background Art

[0002] Patent Document 1 discloses a mobile inventory robot that moves within a store based on manual operation. This mobile inventory robot includes a camera that images products displayed on shelves and barcodes attached to the front of the shelves and corresponding to each product. In the mobile inventory robot system described in Patent Document 1 including this mobile inventory robot, product images are retrieved from a product database using the barcodes decoded from the captured shelf images. And when the retrieved product image and the product image cut out from the shelf image do not match, it is determined that the product is out of stock.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the mobile inventory robot system disclosed in Patent Document 1, the barcode (corresponding to the "index" in the present application) is attached to the front of the shelf and is easily imaged by the camera. On the other hand, it is easily visible to shoppers and the like, and the presence of a large number of barcodes in a position that is easily noticeable gives shoppers and the like a cluttered image, leaving room for improvement from the perspective of store design.

[0005] An object of the present invention is to provide a product management system that is less likely to affect store design while detecting the absence of a product on a product placement surface using an index. [Means for solving the problem]

[0006] The features of the present invention are a product management system for managing the presence or absence of products displayed on the product placement surface of a product display fixture, comprising: a camera for photographing the product placement surface; an indicator placed on the product placement surface and obscured by the product; and a product detection unit that, based on the detection of the indicator by the camera, detects that the product corresponding to the detected indicator is not present on the product placement surface, wherein the indicator is made of a paint that includes an invisible light reflective paint that reflects invisible light, and is transparent or has the same hue as the product placement surface.

[0007] According to this configuration, since the indicators are placed on the product placement surface, the indicators are hidden by the product when a product is present. Even when the indicators are exposed due to the absence of a product, they are not recognizable to the human eye because they are made of a paint that includes invisible light-reflecting paint that reflects invisible light, and are transparent or have the same hue as the product placement surface. Therefore, even if a large number of indicators are exposed due to the absence of a product, it does not give shoppers or others a cluttered impression.

[0008] Therefore, it is possible to provide a product management system that uses indicators to detect when a product is not present on the product display surface, while minimizing its impact on store design.

[0009] In this invention, "same hue" means that the hues are completely identical or adjacent on the Munsell color circle. Furthermore, if the indicator and product display surface are achromatic, "same hue" includes those with the same or similar lightness.

[0010] Furthermore, in the present invention, it is preferable that the camera is an infrared camera, and the indicator is made of a paint that includes an infrared reflective paint as the invisible light reflective paint.

[0011] This configuration utilizes infrared technology, improving the accuracy of indicator detection at night or in darkness.

[0012] Furthermore, in the present invention, it is preferable that the index has the same visible light reflectance as the product placement surface.

[0013] If the reflectivity of the indicator in terms of visible light differs significantly from that of the product placement surface, even if the hue is the same as that of the product placement surface, the difference in how visible light is reflected may allow the indicator to be distinguished from the product placement surface. However, in this configuration, since the reflectivity of visible light is the same, the indicator placed on the product placement surface becomes integrated with the product placement surface, making it even more difficult for shoppers to see.

[0014] Furthermore, in the present invention, the index is preferably an ArUco marker.

[0015] Based on the above feature configuration, ArUco markers are easier and faster to detect with a camera compared to QR codes (registered trademark) and barcodes. [Brief explanation of the drawing]

[0016] [Figure 1] This is a side view showing the product management unit. [Figure 2] This is a perspective view showing product display fixtures. [Figure 3] This is a functional block diagram illustrating the product management system. [Figure 4] This figure shows an example of the processing performed by the product detection unit. [Figure 5] This is a diagram showing the captured image. [Figure 6] This is a plan view showing another example of a display component. [Modes for carrying out the invention]

[0017] An example of the product management system according to the present invention will be described with reference to the drawings. In the following description, as shown in FIG. 2, the front direction (the direction of arrow FR) of the product display rack 1 is defined as "front", and the front, rear, left, and right are defined. In each figure, the direction of arrow BK is "rear", the direction of arrow UP is "up", the direction of arrow DW is "down", the direction of arrow RT is "right", and the direction of arrow LT is "left".

[0018] The product management system S manages the presence or absence of the product G displayed on the product placement surface 10a of the product display rack 1. As shown in FIG. 1, the product management system S includes a product management unit U composed of a product display rack 1, a camera 2 that photographs the product placement surface 10a, and an indicator M disposed on the product placement surface 10a. The product display rack 1 is mainly installed in stores such as supermarkets and convenience stores, and a plurality of products G are displayed.

[0019] A plurality of product display racks 1 are installed in parallel or individually. As shown in FIG. 1, in the present embodiment, a plurality of product display racks 1 face each other across the passage R. Cameras 2 are provided at high positions of each product display rack 1. This is preferable because it eliminates the need for the work of installing the camera 2 on the building body such as the ceiling of the store. This camera 2 is provided at a height position such that at least the entire product placement surface 10a that is the imaging target can be looked down from diagonally above, and includes the product display racks 1 facing each other across the passage R within the viewing angle. The linear distance between adjacent product display racks 1 across the passage R is, for example, about 1500 mm.

[0020] The product management system S includes an edge computer 3 (see FIG. 3) having a product detection unit 32, and a host computer 4 (see FIG. 3) that can communicate with the edge computer 3 through a data communication network. The product detection unit 32 detects that the product G corresponding to the detected indicator M does not exist on the product placement surface 10a based on the detection of the indicator M by the camera 2. Here, "the product G corresponding to the indicator M does not exist on the product placement surface 10a" includes not only the out-of-stock of the product G on the product placement surface 10a, but also the decrease of the product G on the product placement surface 10a (detection of the replenishment opportunity of the product G).

[0021] As shown in FIG. 2, the indicator M is a figure such as an ArUco marker, a QR code (registered trademark), or a barcode. In this embodiment, the indicator M is an ArUco marker. However, the indicator M may be a figure such as "□" or "〇", for example.

[0022] As shown in FIG. 2, the goods G of the same type are arranged in a row along the front-rear direction. The group of goods for this one row corresponds to the indicator M on which the group of goods is placed. When the goods G are placed on the indicator M, that is, when the goods G exist on the indicator M, the indicator M is blocked by the goods G and thus the indicator M is not detected by the camera 2.

[0023] On the other hand, when the goods G do not exist on the indicator M, the indicator M is exposed to the camera 2 and thus the indicator M is detected by the camera 2. In addition, an indicator ID is assigned to each indicator M. Based on this indicator ID, the goods detection unit 32 identifies the goods G corresponding to the indicator M. However, the goods detection unit 32 may identify the display position of the goods G corresponding to the indicator M.

[0024] The indicator M is composed of a paint containing an infrared reflective paint (an example of an invisible light reflective paint) that reflects infrared rays, and has the same hue as the goods placement surface 10a. In other words, the indicator M is drawn on the goods placement surface 10a with an infrared reflective paint having the same hue as the goods placement surface 10a.

[0025] Here, visible light is an electromagnetic wave having a wavelength that can be recognized as light by the naked eye. In this embodiment, visible light is an electromagnetic wave with a wavelength range of 380 nm to 780 nm. Invisible light is an electromagnetic wave having a wavelength other than that of visible light. In this embodiment, invisible light is infrared light with a wavelength range of 780 nm to 2500 nm. Preferably, the wavelength range of the invisible light is 780 nm to 1000 nm.

[0026] In this embodiment, the infrared reflective paint has an infrared reflectance of 60% or more. Preferably, the infrared reflectance of the infrared reflective paint is 90% or more. The infrared reflective paint is, for example, a paint obtained by mixing an infrared reflective pigment or metal powder such as ceramic with a binder resin.

[0027] "Having the same hue" means that, in the Munsell color circle, the hues are completely identical or adjacent. Furthermore, if the indicator M and the product placement surface 10a are achromatic, "having the same hue" includes having the same or similar lightness. In this embodiment, the indicator M has the same hue and lightness as the product placement surface 10a. Specifically, the color of the indicator M and the product placement surface 10a is white. The color of the indicator M and the product placement surface 10a may be, for example, black, brown, cream, gray, or silver.

[0028] [Product display fixtures] As shown in Figures 1 and 2, the product display fixture 1 comprises support columns 11 spaced apart to the left and right and extending vertically, a rear panel 12 provided between the left and right support columns 11, a plate-shaped display member 10 supported by the left and right support columns 11 and extending forward, a rising portion 13 provided at the front end region of the display member 10, a partition member 14 that divides the product placement surface 10a, and an extension member 15 provided at the top of the support columns 11. However, it is not limited to this, and as shown in the product display fixture 1 on the right side of Figure 1, the display member 10 may extend forward and backward relative to the left and right support columns 11, respectively.

[0029] The support column 11 is a hollow tubular member. In this embodiment, the support column 11 is rectangular in shape and has a plurality of engagement holes 11a on its front and rear surfaces. The plurality of engagement holes 11a are spaced apart and arranged vertically.

[0030] The display member 10 is made of metal. The display member 10 is equipped with left and right brackets 10b that engage with engagement holes 11a of the support column 11 and extend in the front-rear direction. In this embodiment, the display member 10 is rectangular in plan view. The display member 10 is supported by the left and right support columns 11 with five display members 10 spaced apart and arranged vertically. However, the number of display members 10 supported by the left and right support columns 11 is arbitrary.

[0031] The display member 10 has a plurality of front openings 10c at its front. The plurality of front openings 10c are arranged along the left-right direction. The display member 10 also has a plurality of rear openings 10d at its rear. The plurality of rear openings 10d are arranged along the left-right direction.

[0032] In this embodiment, as shown in Figure 2, the sheet-like member placed on the display member 10 is the product placement surface 10a. The indicator M is printed or attached to the surface of this sheet-like member. The sheet-like member is located between the front opening 10c and the rear opening 10d on the display member 10. However, the product placement surface 10a may also be the upper surface of the display member 10.

[0033] The rising portion 13 is a price rail that extends along the front end of the display member 10. The rising portion 13 rises upward from the front of the display member 10.

[0034] The partition member 14 is formed by bending a metal rod-shaped member. The lower end of the partition member 14 is engaged with the front opening 10c and the rear opening 10d. The partition member 14 extends in the front-to-back direction from the front opening 10c to the rear opening 10d. The partition member 14 divides the product placement surface 10a into left and right sections. However, the partition member 14 may also be an L-shaped or inverted T-shaped member made of resin.

[0035] The extension member 15 comprises left and right first members 15a extending upward from the upper end of the support column 11, and a second member 15b extending horizontally across the left and right first members 15a. The lower part of the first member 15a has a smaller outer diameter than the rest of the member. The lower part of the first member 15a is inserted into the interior of the support column 11 from the upper end of the support column 11. Specifically, the lower part of the left first member 15a is inserted into the interior of the left support column 11. Similarly, the lower part of the right first member 15a is inserted into the interior of the right support column 11.

[0036] The second member 15b is fixed to the right side of the left support column 11 and the left side of the right support column 11 by fastening members such as bolts and screws or by welding. As shown in Figure 2, the camera 2 is mounted on the second member 15b. Specifically, the camera 2 is fixed to the front surface of the second member 15b by fastening members such as bolts and screws.

[0037] 〔camera〕 Camera 2 is an infrared camera that captures infrared images IM. Camera 2 is capable of detecting infrared light reflected by infrared reflective paint. Although not shown in the figures, Camera 2 has an optical filter that blocks visible light. As shown in Figure 1, Camera 2 is installed diagonally above the display member 10 so that at least one product placement surface 10a is within the field of view θ1. In this embodiment, Camera 2 is installed so that all product placement surfaces 10a of the product display fixture 1 facing each other across the aisle R are within the field of view θ1.

[0038] Specifically, camera 2 is positioned so that two product display fixtures 1, arranged side-by-side, are within its field of view θ1. For example, the horizontal field of view θ1 of camera 2 is approximately 100 degrees. The vertical field of view θ1 of camera 2 is approximately 70 degrees. However, it is not limited to this configuration; camera 2 may also be positioned so that one product display fixture 1 is within its field of view θ1.

[0039] Camera 2 is pointed diagonally downwards. In this embodiment, as shown in Figure 1, the orientation of camera 2 is set so that the optical axis L extending from the center of the lens of camera 2 intersects with the front of the display member 10 on the third row from the top (the middle row vertically). In Figure 1, the intersection point P between the optical axis L and the display member 10 is shown. The angle θ2 between the optical axis L and the horizontal plane passing through intersection point P is approximately 45 degrees. Camera 2 is installed at a height of approximately 2500 mm in a straight line from the ground. However, the orientation (angle θ2) of camera 2 can be arbitrarily set according to the height of camera 2 and the size of the aisle R.

[0040] In this embodiment, the infrared image IM captured by camera 2 is a still image. However, the infrared image IM may also be a video or moving image, which displays still images in sequence.

[0041] The infrared image IM captured by camera 2 is recorded in the image recording unit 21 of the relay device for camera 2. Since there are many cameras 2 installed in the store, the infrared image IM from each camera 2 is sent to and recorded in the image recording unit 21.

[0042] 〔index〕 In Figure 2, the indicator M is shown by a dashed line. The indicator M is positioned in the middle of the front and rear of the display member 10. This makes it less likely for the indicator M to be obstructed by the rising portion 13 at the front end of the display member 10 when viewed from the camera 2. The indicator M is arranged in a matrix. In this embodiment, multiple indicators M are lined up in a row along the entire length in the left-right direction of the product placement surface 10a. Compared to a configuration in which the indicator M is positioned in a part of the product placement surface 10a, the indicator M is more easily visible to shoppers and others. With this configuration, since the hue of the indicator M is transparent or the same as the product placement surface 10a, the indicator M is less likely to be recognized by the naked eye.

[0043] Indicator M has a greater depth dimension than its width dimension. In this embodiment, the aspect ratio of indicator M is between 1.5 and 2.5. Here, the larger the area of ​​indicator M on the product placement surface 10a, the better the recognition rate of indicator M by camera 2. However, if the width dimension of indicator M is increased, the number of indicator M that can be placed on the product placement surface 10a decreases. With this configuration, by making the depth dimension of indicator M larger than the width dimension of indicator M, the recognition rate of indicator M by camera 2 is improved while maintaining the number of indicator M that can be placed on the product placement surface 10a. Therefore, the number of product groups on the product placement surface 10a corresponding to indicator M can be maintained.

[0044] [Edge computing] Edge computer 3 is a terminal having a storage unit and a CPU (Central Processing Unit) that executes programs. The storage unit is composed of, for example, an HDD, ROM (Read Only Memory), or non-volatile memory.

[0045] The edge computer 3 comprises a detection unit 31, a product detection unit 32, a data output unit 33, and a real-time control unit 34. In other words, the functional units are realized by the execution of a program by the CPU of the edge computer 3.

[0046] [Detection unit] As shown in Figure 3, the detection unit 31 includes an image acquisition unit 31a and an extraction unit 31b. The detection unit 31 acquires an infrared image IM from the image recording unit 21.

[0047] The image acquisition unit 31a acquires the infrared image IM recorded in the image recording unit 21 at regular intervals and outputs it to the extraction unit 31b. The infrared image IM shows indicators M that are fully exposed to the camera 2 and indicators M that are partially obscured by products G. The extraction unit 31b determines whether the infrared image IM shows an indicator M that is fully exposed and extracts the region of the indicator M from the infrared image IM.

[0048] [Product detection unit] As shown in Figure 3, the product detection unit 32 includes an indicator information reading unit 32a and a product identification unit 32b. If the infrared image IM contains an indicator M, the product detection unit 32 identifies the product G corresponding to the indicator M based on the indicator M.

[0049] The indicator information reading unit 32a reads the indicator ID assigned to the indicator M extracted by the extraction unit 31b and outputs it to the product identification unit 32b.

[0050] The product identification unit 32b acquires information corresponding to the index ID. For example, the product identification unit 32b identifies the type of product G corresponding to the index ID.

[0051] An example of the processing of the product detection unit 32 will be explained with reference to Figure 4. As shown in Figure 4, the product placement surface 10a is partitioned by a partition member 14. In this embodiment, the area to the left of the partition member 14 and the area to the right of the partition member 14 of the product placement surface 10a have different types of products G on display. Note that the front opening 10c and the rear opening 10d are omitted in Figure 4.

[0052] The display position of product G is predetermined for each display member 10. In Figure 4, the display positions of product G are indicated by solid lines or dashed lines. Product G is present at the display positions indicated by solid lines. Product G is not present at the display positions indicated by dashed lines. In the example in Figure 4, the number of product G (hereinafter referred to as product A) that can be displayed in the area to the left of the partition member 14 is 6 in the front-to-back direction and 3 in the left-to-right direction. The number of product G (hereinafter referred to as product B) that can be displayed in the area to the right of the partition member 14 is 3 in the front-to-back direction and 2 in the left-to-right direction.

[0053] Two indicators M are placed at the display positions of product A, which are the second to fourth from the front. In this case, one of the two indicators M is not located below the center of gravity (center left and right) of product G. In this case, of the two indicators M, the indicator M that is further away from product B, which is of a different type from product A (the one on the left), is designated as the specific indicator PM. In the example in Figure 4, the fifth indicator M from the left is exposed to camera 2. Since the fifth indicator M from the left is the specific indicator PM, the product identification unit 32b acquires the product type (product name, etc.) corresponding to the specific indicator PM (indicator ID: 031). Based on the above, the product identification unit 32b detects that product A is not present on the product placement surface 10a (product A is out of stock or reduced).

[0054] Furthermore, three indicators M are placed at the display positions of product B, which are the first and second from the front. In this case, the product identification unit 32b designates the indicator M located below the center of gravity (center left and right portion) of product G as the specific indicator PM used to determine the presence or absence of product G. The product identification unit 32b acquires information corresponding to the specific indicator PM. In the example in Figure 4, the eighth indicator M from the right is exposed to camera 2. Since this indicator M is the specific indicator PM, the product identification unit 32b acquires the product type (product name, etc.) corresponding to the specific indicator PM (indicator ID: 032). As a result, the product identification unit 32b detects that product B is not present on the product placement surface 10a (product B is out of stock or reduced).

[0055] The information generated by the product detection unit 32 is output from the data output unit 33 along with the infrared image IM and the time of acquisition that formed its basis. This allows for the detection of product shortages or decreases in product G in real time, faster than detection by POS data.

[0056] The real-time control unit 34 illuminates the lights 6 positioned around the product display fixture 1 when it detects that product G is out of stock or depleted. This prompts store staff to replenish product G.

[0057] Each store is equipped with at least one edge computer 3. The processing results from the product detection unit 32 output from the edge computer 3 are transmitted to the host computer 4 or mobile communication terminal 8 via a data communication network such as a private line, the internet, or a public line. The host computer 4 is installed within the store or in a management center that manages multiple stores. In this embodiment, the processing results from the product detection unit 32 are transmitted to the host computer 4 approximately every 5 minutes.

[0058] The host computer 4 includes a notification unit 41 and a database 42. The host computer 4 stores information transmitted from multiple edge computers 3 in the database 42.

[0059] The notification unit 41 notifies information transmitted from the edge computer 3 and information stored in the database 42. Specifically, the notification unit 41 displays this information on the display screen. The notification unit 41 also prints this information out.

[0060] Figure 5 shows an example of an infrared image IM. In Figure 5, the indicator M on the product placement surface 10a is shown by a solid line. A difference in infrared reflectivity occurs between the part of the indicator M indicated by infrared reflective paint (the part shown in black), the part of the indicator M not coated with infrared reflective paint (the part shown in white), and the product placement surface 10a surrounding the indicator M. Camera 2 detects the indicator M due to this difference in infrared reflectivity. On the other hand, the visible light reflectivity of the indicator M is the same as that of the product placement surface 10a. To make the indicator M easier to detect by camera 2, an illumination device that irradiates infrared light onto the underside of the display member 10 or camera 2 may be provided. Alternatively, the part of the indicator M not coated with infrared reflective paint (the part shown in white) and the product placement surface 10a surrounding the indicator M may be made of a material with high infrared absorption (low infrared reflectivity).

[0061] [Another embodiment] The present invention is not limited to the embodiments described above. For example, it may be configured as in the following alternative embodiments. In the alternative embodiments described below, components identical to those in the embodiments are denoted by the same numbers and reference numerals as in the embodiments described above.

[0062] (1) In the above-described embodiment, the product display fixture 1 comprises a plurality of display members 10 arranged in the vertical direction. However, the product display fixture 1 is not limited to this and may take other forms. For example, the product display fixture 1 may be a refrigerated or frozen display case. Alternatively, the product display fixture 1 may be a flat stand in which one tier of display members 10 is supported by a plurality of support columns 11.

[0063] (2) In the embodiment described above, the camera 2 is installed on the product display fixture 1. However, the camera 2 may be installed on the ceiling. In this case, the product display fixture 1 does not need to be equipped with the extension member 15.

[0064] (3) In the above-described embodiment, the camera 2 has an optical filter that can detect infrared rays reflected by the infrared reflective paint and blocks visible light. However, the camera 2 may also have a sensor inside the camera 2 that can detect infrared rays.

[0065] (4) In the embodiment described above, the edge computer 3 includes a detection unit 31 and a product detection unit 32. However, the camera 2 may also include a detection unit 31 and a product detection unit 32. In this case, the camera 2 may be able to communicate with the host computer 4 via a data communication network.

[0066] (5) In the above-described embodiment, the indicator M is drawn on the product placement surface 10a with an infrared reflective paint whose hue is the same as that of the product placement surface 10a. However, the indicator M may also be drawn on the product placement surface 10a with a transparent infrared reflective paint.

[0067] (6) In the embodiments described above, the invisible light is infrared light, and the indicator M is made of a paint containing an infrared reflective paint that reflects red light. However, the invisible light may be ultraviolet light with a wavelength range of 10 nm to 380 nm. Camera 2 may also be an ultraviolet camera that captures ultraviolet images.

[0068] (7) In the embodiment described above, the multiple indicators M are arranged in a single row along the left-right direction of the product placement surface 10a. However, as shown in Figure 6, the multiple indicators M may be arranged in multiple rows along the left-right direction of the product placement surface 10a.

[0069] (8) In the embodiments described above, the display member 10 is rectangular in shape. However, the display member 10 is not limited to this and may take other forms. For example, the front end of the display member 10 may be curved in an arc shape. Also, if the product display fixture 1 is a flat display stand, the display member 10 may be circular or elliptical in shape. Furthermore, the display member 10 does not have to have a front opening 10c and a rear opening 10d.

[0070] (9) In the embodiments described above, the display member 10 is a metal plate-shaped member. However, the display member 10 may be made of a mesh-like wire.

[0071] Furthermore, the display member 10 may be made of other materials. For example, the display member 10 may be made of a material in which a melamine resin sheet with a wood grain pattern is attached to a base material such as wood, glass, or metal.

[0072] (10) The configuration of edge computer 3, host computer 4, and mobile communication terminal 8 is just one example; the whole may be an integrated configuration, or it may be composed of many additional computer devices.

[0073] (11) Each functional unit in the functional block diagram shown in Figure 3 may be integrated or further divided.

[0074] (12) The configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Furthermore, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0075] The present invention is applicable to a product management system that manages the presence or absence of products displayed on the product placement surface of a product display fixture. [Explanation of symbols]

[0076] 1: Product display fixtures 2: Camera 10a: Product placement surface 32: Product detection unit G:Product M :Indicator S: Product Management System

Claims

1. A product management system that manages the presence or absence of products displayed on the product placement surface of a product display fixture, A camera for photographing the product placement surface, An indicator placed on the product placement surface and hidden by the product, The system includes a product detection unit that detects, based on the detection of the indicator by the camera, that the product corresponding to the detected indicator is not present on the product placement surface, The aforementioned indicator is made of a paint that includes an invisible light reflective paint that reflects invisible light, and is transparent or has the same hue as the product placement surface.

2. The aforementioned camera is an infrared camera, The product management system according to claim 1, wherein the indicator is composed of a paint that includes an infrared reflective paint as the invisible light reflective paint.

3. The product management system according to claim 1, wherein the indicator has the same visible light reflectance as the product placement surface.

4. The product management system according to any one of claims 1 to 3, wherein the aforementioned indicator is an ArUco marker.

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