JP7054881B2 - Delivery box dimension measuring device - Google Patents

Description

The present disclosure relates to a dimensional measuring device for a delivery box.

Conventionally, as described in Patent Document 1, a delivery box that is installed in a public place that can be used by an unspecified person and has a plurality of accommodation rooms (accommodation units) is known. This delivery box can be used by an unspecified number of people to ship deliveries. When the sender puts the parcel in the storage part of the measuring device of the parcel box, the dimension measuring device measures the dimensions of the parcel. As a result, the most suitable delivery storage unit is selected from the two sizes of delivery storage units, and the door is automatically opened. The sender stores the parcels in the parcel storage section.

Patent Document 2 describes a device for measuring the dimensions of an object to be measured such as a home-delivered object, which includes a storage room for accommodating the object to be measured, an image pickup unit for imaging the accommodation room, and an image captured by the image pickup unit. Described is an apparatus including an image processing unit that performs image processing based on information and measures the dimensions of an object to be measured.

Japanese Unexamined Patent Publication No. 2017-116482 JP-A-2017-150908

According to the dimension measuring device described in Patent Document 2, the dimension of the object to be measured can be automatically measured from the image captured by the image pickup unit. However, in such a dimensional measuring device, in order to enable dimensional measurement of the object to be measured, it is necessary to place the object to be measured at a predetermined predetermined position in the accommodation chamber. Specifically, a reference corner is set in the accommodation chamber, and the three side surfaces of the object to be measured are substantially brought into contact with the lower surface portion, the first side surface portion, and the second side surface portion that intersect each other at the reference corner to be measured. You need to put things down. On the other hand, if the object to be measured is placed in the accommodation chamber in a state of being displaced from a predetermined position, the dimensions of the object to be measured cannot be measured with high accuracy.

An object of the present disclosure is to provide a dimension measuring device for a delivery box capable of measuring the dimensions of an object to be measured housed in a containment chamber with high accuracy.

The dimensional measuring device of the delivery box of the present disclosure includes a storage chamber for accommodating an object to be measured in and out, an image pickup unit for capturing an image of the object to be measured housed in the accommodation chamber, and information of an image captured by the image pickup unit. An image processing unit and an image processing unit that perform image processing based on the above to measure the dimensions of the object to be measured and detect the presence or absence of a positional deviation of the object to be measured from a predetermined predetermined position based on the image information. It is provided with a notification unit for notifying an inquiry as to whether or not to replace the object to be measured when the misalignment is detected.

According to the dimension measuring device of the delivery box according to the present disclosure, if the object to be measured is displaced from a predetermined position while the object to be measured is placed in the accommodation chamber, whether the object to be measured is replaced by the notification unit. An inquiry as to whether or not is notified. In response to this, the user can reposition the object to be measured until the notification is stopped, so that the dimension measuring device can measure the dimension of the object to be measured accurately placed in a predetermined position with high accuracy. can.

It is a perspective view of the delivery box provided with the dimension measuring apparatus of the embodiment of this disclosure. It is a perspective view which shows an example of the accommodation chamber of a dimension measuring apparatus. It is a block diagram of the dimension measuring apparatus of embodiment of this disclosure. It is a flowchart which shows the position displacement detection and the dimension measurement in an embodiment. (A) is a diagram showing a binary image based on a measurement image captured by an imaging unit in a state where an object to be measured is arranged in a containment chamber, and (b) is a diagram based on the binary image shown in (a). It is a figure which shows the corrected image. It is a figure which shows four kinds of scanning line directions for dimension measurement in the correction image when the object to be measured is arranged at the predetermined position of a containment chamber. (A) is a diagram showing a first height graph showing a change in the length of the first scanning line shown in FIG. 6, and (b) is a diagram showing a change in the length of the second scanning line shown in FIG. It is a figure which shows the 2nd height graph which shows, (c) is the figure which shows the width graph which shows the change of the length of the 3rd scanning line shown in FIG. 6, (d) is the figure which shows | 4 It is a figure which shows the depth graph which shows the change of the length of a scanning line. It is a figure which shows the 1st example of the position deviation detection in the case where the object to be measured is arranged at the position shifted from the predetermined position of the accommodation chamber, and is the figure corresponding to FIG. It is a figure which shows the depth graph which shows the change of the length of the 4th scanning line shown in FIG. It is a figure which shows the 2nd example of the position deviation detection in the case where the object to be measured is arranged at the position shifted from the predetermined position of the accommodation chamber, and is the figure corresponding to FIG. (A) is a diagram showing a first height graph showing a change in the length of the first scanning line shown in FIG. 10, and (b) is a diagram showing a change in the length of the second scanning line shown in FIG. It is a figure which shows the 2nd height graph which shows. FIG. 6 is a diagram showing a method of detecting misalignment when the object to be measured is placed diagonally with respect to the first side surface portion and the second side surface portion at a position deviated from a predetermined position of the accommodation chamber. It is a corresponding figure. It is a figure which shows the depth graph which shows the change of the length of the 4th scanning line shown in FIG. It is a perspective view of the delivery box of another example of embodiment. It is a perspective view which shows the accommodation chamber of the dimension measuring apparatus of another example of embodiment. It is a flowchart which shows the procedure which generates the image for measurement for the dimension measurement of another example of embodiment. It is a figure which shows the image without baggage (image A) generated in the process of generating the image for measurement for the dimension measurement of another example of embodiment. It is a figure which shows the image with luggage (image B) generated in the generation procedure of the image for measurement for the dimension measurement of another example of embodiment. It is a figure which shows the image (image C) generated from the difference between the image of FIG. 17 and the image of FIG. In the image of FIG. 19, it is a figure which shows the method of detecting an edge from each image of three surfaces in a containment chamber. 20 is a diagram showing the detected edges emphasized in FIG. 20. FIG. 21 is an enlarged view showing an image of the vicinity of a luggage.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The shapes and numbers described below are examples for explanation and can be appropriately changed according to the specifications of the delivery box including the dimension measuring device. In the following, the equivalent elements will be described with the same reference numerals in all the drawings. In addition, in the explanation in the text, the reference numerals described earlier shall be used as necessary.

In the following description and drawings, R is the right side when viewed toward the delivery box, L is also the left side, F is the front side of the delivery box, and B is the back side of the delivery box. be. The direction connecting R and L and the direction connecting F and B are orthogonal to each other.

FIG. 1 is a perspective view of a delivery box 12 including the dimension measuring device 20 according to the embodiment of the present disclosure. The delivery box 12 is installed in a public place that can be used by an unspecified number of people, and can be used by an unspecified number of people to ship the delivery.

As shown in FIG. 1, the delivery box 12 includes a substantially rectangular parallelepiped exterior body (main body) 13, a plurality of delivery storage chambers 14, a door 15 for opening and closing the openings of each delivery containment chamber 14, and a dimension measuring device 20. And, the operation display unit 17 is included. Hereinafter, the dimension measuring device 20 may be referred to as a measuring device 20. The delivery storage room 14 has a box shape that allows the object to be measured 90 (FIG. 2) to be taken in and out. In the embodiment, the object to be measured 90 is a delivery product having a rectangular parallelepiped outer shape.

The door 15 closes the opening on the front side F of the delivery storage room 14. The door 15 is a single-door type attached to the delivery box 12, and can open and close the opening of the delivery storage chamber 14 by swinging around a vertical axis (not shown). The door 15 of the delivery storage room 14 is locked with an electric lock 18 (FIG. 3). The electric lock 18 is unlocked by a user operation or the like on the operation display unit 17 (FIG. 1) described later. The electric lock 18 is a bar code, a QR code (registered trademark), a wireless signal transmission / reception using Bluetooth (registered trademark) with a mobile terminal such as a smartphone, a touchless key using radio waves or infrared rays, and an IC card. , It may be configured so that it can be canceled by inputting with a ten key or the like.

Further, a luggage sensor 19 (FIG. 3) is provided inside the delivery storage room 14. The luggage sensor 19 detects the presence or absence of luggage such as parcels delivered in the corresponding parcel delivery accommodation room 14. The luggage sensor 19 is composed of, for example, a strain gauge. The strain gauge contains a metal resistance material, and the metal resistance material shrinks when an external compressive force is applied, and its resistance value decreases. The detection information of the luggage sensor 19 is transmitted to the control device 30 (FIG. 3) of the delivery box 12.

The control device 30 detects the presence or absence of a parcel from the weight of the parcel arranged in the delivery accommodation room 14 based on the electric signal, and if the parcel is detected, converts it into baggage detection information. The information detected by the baggage sensor 19 may be transmitted to the baggage sensor control unit (not shown) instead of the control device 30. In this case, the cargo sensor control unit converts the detection information of the cargo sensor 19 into the cargo detection information. The parcel sensor 19 may be provided in the parcel delivery accommodation chamber 14 and may be configured to detect the presence or absence of parcel in the parcel delivery accommodation chamber 14 by an optical sensor such as an infrared sensor.

The measuring device 20 can open and close two measurement storage chambers 51 arranged adjacent to each other in the left-right direction at the lower end of the left L end of the delivery box 12 and an opening on the front side F of the measurement storage chamber 51. It has a door 52 to close. The configuration and function of the door 52 are the same as those of the door 15 of the delivery accommodation room 14. Further, a luggage sensor 19 (FIG. 3) is also provided inside the measurement accommodation chamber 51 as in the delivery accommodation chamber 14. The door 52 of the measurement storage chamber 51 may be configured to be unlocked. The configuration of the measuring device 20 will be described in detail later.

The operation display unit 17 is arranged above the measuring device 20 on the front side F of the delivery box 12. The operation display unit 17 is composed of a touch panel display or the like, and has a function of receiving input by a user's operation and a function of a display unit. A settlement unit 70 is arranged below the operation display unit 17. The payment unit 70, for example, sends and receives a wireless signal to and from an IC card owned by the user to settle electronic money. Instead of the operation display unit 17, a display unit composed of a liquid crystal display (LCD) and an operation unit composed of a numeric keypad or the like may be provided. Further, the settlement unit 70 may be configured to be settled by inputting the identification number and password of the credit card with the numeric keypad.

When a delivery person who is a customer of a delivery company makes a delivery request for a delivery using the delivery box 12, the delivery request is performed as follows. For example, when the sender selects the "shipping" display unit from the menu screen displayed on the operation display unit 17 of the delivery box 12, the door 52 of the measuring device 20 automatically opens. When the sender accommodates the delivery item in the measurement storage room 51 and closes the door 52, the measuring device 20 takes an image of the delivery item by the image pickup unit 23 (FIG. 3). Then, the image processing unit 32 (FIG. 3) detects the presence or absence of a position shift from a predetermined predetermined position of the delivery item based on the information of the image captured by the image pickup unit 23. When it is detected that there is no such misalignment, the measuring device 20 measures the dimensions of the delivery item based on the information of the image captured by the image pickup unit 23. The measurement result of the dimension measured by the measuring device 20 is displayed on the operation display unit 17.

The sender inputs the delivery address and the like using the operation display unit 17, and then takes out the delivery from the measurement storage room 51. It should be noted that the sender may be configured to be able to pre-register the shipping address and the like by making a reservation in advance using the Internet instead of the operation display unit 17. Then, the sender selects one of the delivery accommodation rooms 14 by using the operation display unit 17. As a result, the door 15 of the selected delivery storage room 14 is unlocked and the door 15 is automatically opened, so that the sender accommodates the delivery in the delivery storage room 14. It is detected by the luggage sensor 19 that the parcel delivery is stored in the parcel delivery storage room 14. After that, since the shipping fee is displayed on the operation display unit 17, the sender setstle the shipping fee on the settlement unit 70. FIG. 1 shows a case where the delivery box 12 includes two measurement storage chambers 51, but the measurement storage chamber 51 and the door 52 that closes the opening thereof may be only one each.

When the delivery is settled, the delivery box 12 notifies the delivery company's terminal device, the sender's terminal device, and the management server of the delivery request information via the communication network. Therefore, the delivery company goes to the installation location of the delivery box 12, opens the door 15 of the corresponding delivery storage room 14, takes out the delivery from the delivery storage room 14, and performs the delivery work to the delivery destination.

Next, the measuring device 20 will be described in detail. FIG. 2 is a perspective view showing an example of the measurement accommodation chamber 51. FIG. 3 is a block diagram of the measuring device 20. The measuring device 20 includes the above-mentioned measuring accommodating chamber 51 and door 52, an imaging unit 23, and a control device 30 (FIG. 3). The control device 30 has an image processing unit 32 (FIG. 3). The image processing unit 32 has a position shift detection unit 33 (FIG. 3), which will be described later.

The measurement storage chamber 51 has a box shape that allows the object to be measured 90 to be taken in and out. As described above, the opening on the front side F of the measurement accommodation chamber 51 is closed by the door 52. The door 52 of the measurement storage chamber 51 may be locked and unlocked with an electric lock, and the electric lock may be unlocked by a user operation or the like on the operation display unit 17 (FIG. 1).

The storage chamber 51 for measurement is a rectangular parallelepiped space surrounded by a bottom plate portion 53, a right wall portion 54, a left wall portion 55, and a rear wall portion 56, which are three side wall portions, and a top plate portion 57. .. The bottom plate portion 53, the wall portions 54, 55, 56, and the top plate portion 57 are all rectangular. The upper surface of the bottom plate portion 53 is the lower surface portion 53a. The object to be measured 90, which is a delivery item, is placed on the lower surface portion 53a.

The right wall portion 54 extends upward from the right end of the bottom plate portion 53. The rear wall portion 56 extends upward from the rear end of the bottom plate portion 53. The left wall portion 55 extends upward from the left end of the bottom plate portion 53. The surface of the left wall portion 55 on the measurement accommodation chamber 51 side is the first side surface portion 55a. The surface of the rear wall portion 56 on the measurement accommodation chamber 51 side is the second side surface portion 56a.

The first side surface portion 55a, the second side surface portion 56a and the lower surface portion 53a intersect at the reference corner portion 58. The reference corner 58 is a position where the object to be measured 90 is pushed in when the object to be measured 90 is placed in the measurement storage chamber 51. In the measurement storage chamber 51, the object to be measured 90 is placed so as to be aligned with the reference corner portion 58, and the lower surface of the object to be measured 90 and the three adjacent side surfaces are the lower surface of the measurement accommodation chamber 51. It comes into contact with the portion 53a, the first side surface portion 55a, and the second side surface portion 56a, respectively. The position of the object to be measured 90 at this time is a predetermined position determined in advance for dimensional measurement.

Of the inner surface of the measurement accommodating chamber 51, the peripheral portions of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a have a rectangular frame-shaped first marker 61, a second marker 62, and a second marker, respectively. 3 The marker 63 is displayed. As described later, the markers 61, 62, and 63 are used to create correction data for correcting the distortion of the outer shape of the object to be measured 90 in the captured image. The first, second, and third markers 61, 62, and 63 are similar to the rectangle defining the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a, respectively, and have a rectangular shape slightly smaller than this rectangle. Is displayed in. Each side of each marker 61, 62, 63 is parallel to the corresponding side of the rectangle defining the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a.

The first, second, and third markers 61, 62, and 63 have the same color tone, but it is preferable that they have different color tones. Here, the color tone means a color tone such as lightness and saturation of a color.

As shown in FIG. 3, the image pickup unit 23 includes a camera body 24 and a lighting device 25. The camera body 24 is, for example, a corner portion in the upper portion of the measurement accommodation chamber 51 on the opening side, and the object to be measured 90 is from the end portion of the right side R (the right end portion in FIG. 2) which is a position facing the reference corner portion 58. It is arranged diagonally downward so as to image. For the camera body 24, for example, a CCD camera is used. The camera body 24 may be a CMOS camera. The operation of the camera body 24 is controlled by the control device 30, and the camera body 24 captures an image of the object to be measured 90 housed in the measurement storage chamber 51. The information of the image captured by the camera body 24 is transmitted to the control device 30. The image captured by the camera body 24 may be grayscale or color. When the image is color, it may be converted into a grayscale image when performing image processing. The control device 30 can be arranged, for example, around the top plate portion 57 (FIG. 2) constituting the upper end of the measurement storage chamber 51 or the operation display portion 17 of the delivery box 12 shown in FIG.

The lighting device 25 is arranged integrally with the camera body 24 adjacent to the camera body 24 as a part of the image pickup unit 23 in the upper part of the measurement accommodation chamber 51. The lighting device 25 illuminates and brightens the inside of the measurement accommodation chamber 51, particularly the lower portion. The lighting device 25 is controlled on and off by the control device 30. For the lighting device 25, for example, a white LED is used. Fluorescent lamps, light bulbs, and LEDs of other colors may be used for the lighting device 25. The dimension measuring device may be configured such that a lighting device for illuminating the inside of the measurement accommodating chamber 51 is arranged as a device different from the imaging unit 23.

Further, the image pickup unit 23 has a lower surface portion 53a, a first side surface portion 55a, a second side surface portion 56a, and markers 61, 62, 63 in advance in a state before the object to be measured 90 is arranged in the measurement accommodation chamber 51. Is imaged and the original image is acquired. The information of the original image is transmitted to the control device 30 described later and stored in the storage unit 35 of the control device 30. The original image is used in the correction mode described later.

As shown in FIG. 3, the control device 30 includes, for example, an arithmetic processing unit 31 composed of an MCU (Micro Controller Unit) and a storage unit 35. The storage unit 35 may be a RAM, a ROM, or the like. The arithmetic processing unit 31 has a function of reading and executing a program or the like stored in advance in the storage unit 35. The storage unit 35 has a function of temporarily storing the read program and processing data, and a function of storing a control program, a predetermined threshold value, and the like in advance.

By executing the program by the control device 30, the main function of the device, system, or method in the present disclosure is realized. The type of the arithmetic processing unit 31 does not matter as long as the function can be realized by executing the program. For example, the arithmetic processing unit may be a CPU. The arithmetic processing unit may be composed of one or a plurality of electronic circuits including a semiconductor integrated circuit (IC) or an LSI (large scale integration). A plurality of electronic circuits may be integrated on one chip or may be provided on a plurality of chips. A plurality of chips may be integrated into one device, or may be provided in a plurality of devices. A non-temporary recording medium such as an optical disk or a hard disk drive may be used as the storage unit. An external storage device may be connected to the control device 30 as a storage unit. The program may be stored in a recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet or the like.

The control device 30 also includes an interface 36. An operation display unit 17 (FIG. 1) is connected to the arithmetic processing unit 31 via the interface 36. At least one of a personal computer (PC), an input device, and a monitor, which is a display, may be connected to the arithmetic processing unit via an interface.

Further, the arithmetic processing unit 31 includes an image processing unit 32. The image processing unit 32 has a position shift detecting unit 33 and a dimension measuring unit 34. The dimension measuring unit 34 performs image processing based on the information of the image captured by the camera main body 24, and measures the dimensions of the object to be measured 90 accommodated in the measurement accommodating chamber 51 (FIG. 2).

The misalignment detection unit 33 detects the presence or absence of misalignment of the object to be measured 90 from a predetermined predetermined position based on the information of the image captured by the camera body 24 before performing the above-mentioned dimensional measurement. ..

Further, the measuring device 20 includes a notification unit 37 and a re-imaging button 38. The notification unit 37 is a display unit composed of, for example, a liquid crystal display (LCD) arranged on the front side of the delivery box 12. When the image processing unit 32 detects the positional deviation of the object to be measured 90, the notification unit 37 notifies the user of an inquiry as to whether or not to replace the object to be measured 90. For example, the notification unit 37 may display a message such as "The delivery item is out of the proper position. Do you want to replace the delivery item?"

The reimaging button 38 corresponds to the reimaging instruction unit, and a signal indicating that the reimaging button 38 has been operated is transmitted to the control device 30. When operated by the user, the reimaging button 38 instructs the imaging unit 23 to reimage the object 90 to be measured via the control device 30. The reimaging button 38 also has a repositioning notification function of transmitting to the control device 30 that the user has decided to reposition the object to be measured 90. Specifically, when the re-imaging button 38 is operated, the control device 30 instructs the imaging unit 23 to re-imaging in the measurement accommodating chamber 51. The image processing unit 32 re-detects the presence or absence of a positional deviation of the object to be measured 90 from a predetermined position based on the information of the image re-imaged by the image pickup unit 23. As a result, the user can reposition the object to be measured 90 until the above inquiry is no longer notified, so that the measuring device 20 can measure the dimension of the object to be measured 90 accurately placed at a predetermined position with high accuracy. .. The notification unit may be the display in the operation display unit 17 (FIG. 1). Further, the notification unit may be used as a voice output unit instead of the display unit to notify the user by voice of an inquiry as to whether or not to replace the object to be measured 90.

A method of detecting misalignment and measuring dimensions in the embodiment will be described with reference to FIG. 4. FIG. 4 is a flowchart showing positional deviation detection and dimensional measurement in the embodiment. In step S11, it is determined whether or not the control device 30 has detected the object to be measured 90 in the measurement accommodation chamber 51. When the object 90 to be measured is placed in the measurement storage chamber 51 and the door 52 is closed, the luggage sensor 19 detects that there is luggage, so the determination result in step S11 is affirmative, and the process proceeds to step S12. If the determination result in step S11 is negative, the process of step S11 is repeated. A weight display unit may be arranged, for example, at the upper end of the measurement storage chamber 51 so that the weight is displayed when the weight of the object to be measured is detected by the luggage sensor 19.

In step S12, after the lighting device 25 is turned on, the camera body 24 takes an image of the inside of the measurement accommodation chamber 51 in step S13.

Next, in step S14, the image processing unit 32 acquires a measurement image, a binary image 40 (FIG. 5 (a)), and a corrected image 41 (FIG. 5 (b)). Specifically, the image processing unit 32 executes the correction mode based on the image captured by the camera body 24. In the correction mode, in the original image stored in the storage unit 35 (FIG. 3) in advance, the edges of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a of the measurement accommodation chamber are linearly aligned. Calculate the distortion correction data for correction. In the correction mode, the strain correction data is used to correct a measurement image obtained by capturing a state in which the object to be measured is placed in the measurement accommodation chamber.

More specifically, in the correction mode, noise reduction and filter processing based on the luminance value are performed on the original image stored in the storage unit 35. Next, the filtered image is binarized to detect an edge, and a binary image which is an image including the edge is acquired. Next, in the correction mode, the markers 61, 62, 63 of the binary image are identified by pattern matching from the information of the shape and the luminance value of each marker stored in the storage unit 35 in advance. Next, from each of the identified markers 61, 62, 63, the edges A1 to A9 of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a in the binary image are identified.

The correction mode is then adjusted by calculating an internal parameter that associates the coordinates of the binary image before distortion correction with the binary image after distortion correction. Internal parameters are composed of optical axis center coordinates, focal length, lens distortion coefficient, and the like. For example, in the captured image of the checkerboard, the positions of the intersections of the pattern are detected, and the internal parameters are calculated so that the intervals of the intersections are even. At this time, the internal parameter becomes the correction data.

Next, the correction mode corrects the distortion of the edges A1 to A9 of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a by using the internal parameters, and corrects the edges A1 to A9 by making them linear. Get the later binary image. In the correction mode, a binary image in which the distortions of the edges A1 to A9 are corrected by other than the internal parameters may be acquired.

Next, in the correction mode, the lower surface portion 53a, the first side surface portion 55a, the second side surface portion 56a, the markers 61, 62, 63 and the subject are placed in a state where the object to be measured 90 is arranged at a predetermined position in the measurement accommodation chamber 51. The measurement object 90 is imaged by the image pickup unit 23, and a measurement image is acquired. Next, in the correction mode, the binary image 40 as shown in FIG. 5A is acquired by performing noise reduction, filtering, and binarization on the measurement image. In the binary image 40, the edges A1 to A9 of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a are identified, and the edges T1 to T8 of the object to be measured are identified.

Next, in the correction mode, using the binary image and the correction data acquired above, the edges A1 to A9 of the first side surface portion 55a, the second side surface portion 56a, and the lower surface portion 53a, and the edge of the object to be measured are used. The distortion of T1 to T9 is corrected, and the corrected image 41, which is a corrected binary image as shown in FIG. 5B, is acquired. In the dimension measurement of the object to be measured 90, which will be described later, the dimension of the object to be measured 90 is calculated by calculating the edge length of the object to be measured 90 in the directions indicated by the arrows C1, C2, and C3 in FIG. 5 (b). Can be measured.

Next, in step S15 of FIG. 4, the image processing unit 32 detects the presence or absence of a positional deviation of the object to be measured 90 from a predetermined position.

FIG. 6 is a diagram showing four types of scanning line directions for dimensional measurement in a corrected image when the object to be measured 90 is arranged at a predetermined position in the measurement accommodation chamber 51. 7 (a) is a diagram showing a first height graph showing a change in the length of the first scanning line E1 shown in FIG. 6, and FIG. 7 (b) is a diagram showing a second scanning line E2 shown in FIG. It is a figure which shows the 2nd height graph which shows the change of the length of. 7 (c) is a diagram showing a width graph showing a change in the length of the third scanning line E3 shown in FIG. 6, and FIG. 7 (d) is a diagram showing the length of the fourth scanning line E4 shown in FIG. It is a figure which shows the depth graph which shows the change of.

In the corrected image shown in FIG. 6, the object to be measured 90 is accurately arranged at a predetermined position. By using such a corrected image, the dimensions of the object to be measured 90 can be measured with high accuracy. At this time, the image processing unit 32 uses scanning lines for scanning pixels, which are scanning lines in the image processing direction of the image. For example, the image processing unit 32 can use a plurality of first scanning lines E1 that scan pixels arranged along the length direction of the edge A1 of the first side surface portion 55a. Further, in FIG. 6, the checkerboard pattern is displayed on the lower surface portion 53a, but the display of this pattern may be omitted.

In FIG. 6, the first scanning line E1 is indicated by a solid arrow. The first scanning line E1 is scanned from the edge A2 toward the edge A4 until it reaches any one of the plurality of edges A1 to A9 and T1 to T8. Then, the image processing unit 32 acquires the first height graph shown in FIG. 7A by calculating the lengths of the plurality of first scanning lines E1. In the first height graph, when the reference coordinate G corresponds to the reference corner portion 58 (FIG. 2) and is separated from the reference coordinate G along the edge A4, the scanning line length is small on the side closer to the reference coordinate G. It is maintained at 1 length L1. At this time, the length of the first scanning line E1 is defined by the upper end of the object to be measured 90. On the other hand, at a position separated from the reference coordinate G by a predetermined length, the first scanning line E1 deviates from the object to be measured 90, so that the scanning line length becomes a stepwise larger second length L2, which is longer than the reference coordinate G. The scanning line length is maintained at the second length L2 even if it is separated from the above. Therefore, the height H1 of the object to be measured 90 can be calculated by calculating the difference between the second length L2 and the first length L1 on the first height graph. The height H1 is the dimension of the object to be measured 90 in the direction of the arrow C1 in FIG. 5 (b).

The image processing unit 32 can also use a plurality of second scanning lines E2 that scan pixels arranged along the length direction of the edge A1 of the second side surface portion 56a. In FIG. 6, the second scanning line E2 is indicated by an alternate long and short dash arrow. The second scanning line E2 is scanned from the edge A6 toward the edge A7 until it reaches any one of the plurality of edges A1 to A9 and T1 to T8. Then, the image processing unit 32 acquires the second height graph shown in FIG. 7B by calculating the lengths of the plurality of second scanning lines E2. In the second height graph, when the distance from the reference coordinate G is along the edge A7, the scan line length is maintained at the small first length L1 on the side closer to the reference coordinate G. At this time, the length of the second scanning line E2 is defined by the upper end of the object to be measured 90. On the other hand, at a position separated from the reference coordinate G by a predetermined length, the second scanning line E2 deviates from the object to be measured 90, so that the scanning line length becomes a stepwise larger second length L2, which is longer than the reference coordinate G. The scanning line length is maintained at the second length L2 even if it is separated from the above. Therefore, the height H1 of the object to be measured 90 can also be calculated by calculating the difference between the second length L2 and the first length L1 on the second height graph.

The image processing unit 32 can also use a plurality of third scanning lines E3 that scan pixels arranged along the length direction of the edge A4 of the lower surface portion 53a. In FIG. 6, the third scanning line E3 is indicated by a two-dot chain arrow. The third scanning line E3 is scanned from the edge A9 toward the edge A7 until it reaches any one of the plurality of edges A1 to A9 and T1 to T8. Then, the image processing unit 32 acquires the width graph shown in FIG. 7 (c) by calculating the lengths of the plurality of third scanning lines E3. In the width graph, when the distance from the reference coordinate G is along the edge A7, the scan line length is maintained at the small third length L3 on the side closer to the reference coordinate. At this time, the length of the third scanning line E3 is defined by the edge T5 at the front end of the object to be measured 90. On the other hand, at a position separated from the reference coordinate G by a predetermined length, the third scanning line E3 deviates from the object to be measured 90, so that the scanning line length becomes a stepwise larger fourth length L4, which is longer than the reference coordinate G. The scanning line length is maintained at the fourth length L4 even if it is separated from the above. Therefore, by calculating the difference between the fourth length L4 and the third length L3 on the width graph, the dimension H2 in the front-rear direction of the object to be measured 90 can be calculated. The front-back dimension H2 is the dimension of the object to be measured 90 in the direction of arrow C2 in FIG. 5 (b).

The image processing unit 32 can also use a plurality of fourth scanning lines E4 that scan pixels arranged along the length direction of the edge A7 of the lower surface portion 53a. In FIG. 6, the fourth scanning line E4 is indicated by a long dashed arrow. The fourth scanning line E4 is scanned from the edge A8 toward the edge A4 until it reaches any one of the plurality of edges A1 to A9 and T1 to T8. Then, the image processing unit 32 acquires the depth graph shown in FIG. 7D by calculating the lengths of the plurality of fourth scanning lines E4. In the depth graph, when the distance from the reference coordinate G is along the edge A4, the scan line length is maintained at the small fifth length L5 on the side closer to the reference coordinate G. At this time, the length of the fourth scanning line E4 is defined by the rightmost edge T4 of the object to be measured 90. On the other hand, at a position separated from the reference coordinate G by a predetermined length, the fourth scanning line E4 deviates from the object to be measured 90, so that the scanning line length becomes the sixth length L6, which is stepwise larger, and is longer than the reference coordinate G. The scanning line length is maintained at the sixth length L6 even if it is separated from the above. Therefore, by calculating the difference between the sixth length L6 and the fifth length L5 on the depth graph, the left-right dimension H3 of the object to be measured 90 can be calculated. The left-right dimension H3 is the dimension of the object to be measured 90 in the direction of arrow C3 in FIG. 5 (b). In FIGS. 6 and 7, the second to fourth scanning lines E2, E3, and E4 are indicated by a one-dot chain line, a two-dot chain line, and a long dashed line, respectively, but in reality, each scanning line is indicated by a solid line. be able to. Further, the first to fourth scanning lines E1 to E4 may be distinguishable by the difference in color.

If the object to be measured 90 is accurately placed at a predetermined position in the measurement accommodation chamber 51 as described above, the dimensions of the object to be measured 90 can be measured with high accuracy. On the other hand, in reality, the user may place the object to be measured 90 at a position deviated from a predetermined position in the measurement accommodation chamber 51, and in that case, the dimensions of the object to be measured 90 cannot be measured with high accuracy. .. In the embodiment, in such a case, the position shift detection unit 33 of the image processing unit 32 detects the presence or absence of the position shift of the object to be measured 90 by using the above-mentioned correction drawing.

FIG. 8 is a diagram showing a first example of position deviation detection when the object to be measured 90 is arranged at a position deviated from a predetermined position of the measurement accommodation chamber 51, and is a diagram corresponding to FIG. FIG. 9 is a diagram showing a depth graph showing a change in the length of the fourth scanning line E4 shown in FIG. As shown in FIG. 8, the object to be measured 90 may be arranged away from the second side surface portion 56a including the edges A1 and A7. In this case, the image processing unit 32 acquires a depth graph based on the fourth scanning line E4 as shown in FIG. As is clear from a comparison between FIG. 7 (d) and FIG. 9, in the depth graph of FIG. 9, the fourth scanning line E4 does not reach the edge T4 of the object to be measured 90 near the reference coordinate G. The scanning line length is rapidly increasing. The misalignment detection unit 33 detects the misalignment of the object 90 to be measured by measuring the change in the scanning line length of the depth graph. For example, from the data corresponding to the graph showing the change in the scan line length, it is detected that there is a misalignment when the change in which the scan line length increases as the reference coordinate G approaches the reference coordinate G is measured. Will be done.

FIG. 10 is a diagram showing a second example of position deviation detection when the object to be measured 90 is arranged at a position deviated from a predetermined position of the measurement accommodation chamber 51, and is a diagram corresponding to FIG. 11 (a) is a diagram showing a first height graph showing a change in the length of the first scanning line E1 shown in FIG. 10, and FIG. 11 (b) is a diagram showing a second scanning line E2 shown in FIG. It is a figure which shows the 2nd height graph which shows the change of the length of.

In the example shown in FIG. 10, the object to be measured 90 is arranged away from the second side surface portion 56a, as in the example shown in FIG. In this case, the image processing unit 32 uses the first scanning line E1 and the second scanning line E2 to form a first height graph and a second height graph as shown in FIGS. 11A and 11B. Is obtained. As is clear from a comparison between FIGS. 7 (a) and 11 (a), in the first height graph of FIG. 11 (a), the first scanning line E1 is the object to be measured at a portion close to the reference coordinate G. The edge T8 of 90 is not reached, and the scanning line length is sharply increased. The misalignment detection unit 33 detects the misalignment of the object 90 to be measured by measuring the change in the scanning line length of the first height graph. For example, from the data corresponding to the graph showing the change in the scan line length, it is detected that there is a misalignment when the change in which the scan line length increases as it approaches the reference coordinate near the reference coordinate G is measured. To.

Further, as is clear from comparing FIGS. 11A and 11B, the minimum length of the second scanning line E2 set by reaching the edge T2 of the object 90 to be measured in the second height graph. L1a is larger than the minimum length L1 of the first scanning line E1 set by reaching the edge T8 of the object to be measured 90 in the first height graph. The reason for this is that the object to be measured 90 is separated from the second side surface portion 56a. For this reason, the misalignment detection unit 33 may measure the change in the scanning line length between the first height graph and the second height graph. At this time, the misalignment detection unit 33 has an absolute difference Ha between the minimum length L1 of the first scanning line E1 of the first height graph and the minimum length L1a of the second scanning line E2 of the second height graph. When the value is equal to or more than a preset predetermined value, it may be detected that there is a misalignment.

Further, as shown in FIGS. 8 and 10, when the object to be measured 90 is arranged away from the second side surface portion 56a, a width graph based on the third scanning line E3 shown in FIG. 6 (FIG. 7 (c)). (See), the scanning line length becomes shorter near the reference coordinate G. On the other hand, the quality of the scanning line length cannot be detected only by the width graph. Therefore, it is difficult to detect the misalignment of the object to be measured 90 when the object to be measured 90 is arranged away from the second side surface portion 56a only by the width graph.

On the other hand, in the above, the case where the object to be measured 90 is arranged away from the second side surface portion 56a has been described, but the object to be measured 90 may be arranged away from the first side surface portion 55a. In this case, the object to be measured may be a width graph based on the third scanning line E3, or one or both of the first and second height graphs based on the first scanning line E1 and the second scanning line E2. It is possible to detect the misalignment of 90.

As described above, the misalignment detection unit 33 may be able to detect the presence or absence of misalignment of the object to be measured 90 by using only a part of the scanning lines E1 to E4 of the first to fourth scanning lines. It is preferable to detect the positional deviation by using all of the fourth scanning lines E1 to E4 from the viewpoint of improving the detection accuracy.

Next, in step S16 of FIG. 4, the control device 30 determines whether or not there is a positional deviation of the object to be measured 90. When it is determined that there is a misalignment as described above, the process proceeds to step S17, the control device 30 notifies the notification unit 37 (FIG. 3) that there is a misalignment, and the object to be measured 90 is placed. Notify you of an inquiry as to whether or not to fix it.

Next, in step S18 of FIG. 4, the control device 30 determines whether or not there is an instruction for re-imaging by the re-imaging button 38 (FIG. 3). When it is determined that the reimaging instruction is given by the reimaging button 38, the process returns to step S11 and the process is repeated. As a result, the image processing unit 32 re-detects the presence or absence of a positional deviation of the object to be measured 90 from a predetermined position based on the information of the image re-imaged by the image pickup unit 23.

On the other hand, in step S18, it is determined that there is no instruction for reimaging by the reimaging button 38, and in step S16, it is determined that there is no misalignment of the object to be measured 90. ..

In step S19, the dimension measuring unit 34 (FIG. 3) of the image processing unit 32 measures the dimensions of the object to be measured 90 from the corrected image as described above.

After that, in step S20, the control device 30 causes the operation display unit 17 (FIG. 1) to display the measurement result of the dimensions of the object to be measured 90. The control device 30 may calculate the shipping fee of the object to be measured 90 by using the measurement result of the dimension. Further, the volume of the object to be measured 90 may be calculated using the measurement result of the dimension.

According to the dimension measuring device 20 of the delivery box described above, when the object to be measured 90 is displaced from a predetermined position when the object to be measured 90 is placed in the measurement storage chamber 51, the notification unit 37 measures the object to be measured. An inquiry as to whether or not to replace the object 90 is notified. Accordingly, the user can reposition the measured object 90 until the notification is stopped, so that the dimension measuring device 20 measures the dimension of the measured object 90 accurately placed at a predetermined position with high accuracy. can do.

FIG. 12 shows a method of detecting the positional deviation when the object to be measured 90 is diagonally arranged with respect to the first side surface portion 55a and the second side surface portion 56a at a position deviated from a predetermined position of the measurement accommodating chamber 51. It is a figure which corresponds to FIG. FIG. 13 is a diagram showing a depth graph showing a change in the length of the fourth scanning line E4 shown in FIG.

As shown in FIG. 12, when the object to be measured 90 is placed obliquely with respect to the first side surface portion 55a and the second side surface portion 56a, the image processing unit 32 uses the fourth scanning line E4 to show FIG. A depth graph as shown is obtained. As is clear from a comparison between FIG. 7 (d) and FIG. 13, in the depth graph of FIG. 13, the fourth scanning line E4 does not reach the edge T4 of the object to be measured 90 near the reference coordinate G. The scanning line length is rapidly increasing. Further, the scanning line length from the reference coordinate G to the edge T4 of the object to be measured 90 increases as the distance from the reference coordinate G increases. By measuring the change in the scanning line length of the depth graph, the misalignment detection unit 33 can detect not only the misalignment of the object 90 to be measured but also the oblique placement. For example, from the data corresponding to the graph showing the change in the scanning line length shown in FIG. 13, the position shift is measured when the change in which the scanning line length increases as the reference coordinate G approaches the reference coordinate G is measured. Is detected. At the same time, from the data corresponding to the graph showing the change in the scanning line length shown in FIG. 13, the change in which the scanning line length gradually increases as the distance from the reference coordinate G G increases is measured in the range away from the reference coordinate G. At that time, it is detected that the object to be measured 90 is placed diagonally.

Although the case where the object to be measured 90 is a rectangular parallelepiped has been described above, the outer shape of the object to be measured is not limited to this, and other shapes such as a cylinder may be used.

Further, the reimaging instruction unit for instructing the reimaging of the object to be measured is not limited to the reimaging button 38, and may be an operation display unit or the like on the touch panel of the operation display unit 17.

FIG. 14 is a perspective view of another delivery box 12a of the embodiment. In the delivery box 12a, a plurality of delivery storage chambers 14a and 14b are arranged side by side on the left side L of the exterior body 13a. On the right side R of the exterior body 13a, an operation panel unit 16 including an operation display unit 17a and a dimension measuring device 20a are arranged vertically side by side. A barcode reader 72, an IC card reader 73, a printer 74, and a security camera 75 are attached to the operation panel unit 16.

For example, a menu screen is displayed on the operation display unit 17a, and when the user touches and selects from a plurality of items displayed on the menu screen, the control device 30 (see FIG. 3) processes according to the selection. To execute. For example, on the menu screen, "measurement" that triggers the start of dimension measurement is displayed.

The doors of the delivery storage chambers 14a and 14b may be locked with an electric lock and unlocked with a bar code, an IC card, or the like. The printer 74 may print the payment information when the sender of the delivery item operates the operation display unit 17a or the like to settle the shipping fee. The security camera 75 is used to monitor the presence or absence of a suspicious person in the vicinity of the delivery box 12a.

FIG. 15 is a perspective view showing a measurement accommodating chamber 51a of another dimension measuring device 20a of the embodiment. The measurement accommodation chamber 51a is closed by the door 52a. A panel portion 76 is exposed on the upper side of the measurement storage chamber 51a with the door 52a open, and a weight display portion 77 composed of a liquid crystal display portion is arranged on the panel portion 76. A weight measuring unit 78 is arranged at the bottom of the measuring storage chamber 51a. The weight measuring unit 78 has, for example, a movable portion movable in the vertical direction on the upper surface thereof, and the movable portion has an elastic member (not shown) between the movable portion and the fixed portion on the lower side. As the weight of the load 91 corresponding to the object to be measured increases, the movable portion moves downward against the elasticity of the elastic member. As a result, the weight of the luggage 91 is measured from the vertical position of the movable portion. The measured weight is displayed on the weight display unit 77. The upper surface of the movable portion corresponds to the lower surface of the measurement storage chamber 51a. The weight measuring unit 78 functions as a luggage sensor for detecting that there is a luggage 91 in the measuring storage chamber 51a when the measured weight is equal to or more than a predetermined value.

An imaging unit 23 is attached to the left side L of the opening end in the upper part of the measurement accommodating chamber 51a. The camera body of the image pickup unit 23 is arranged diagonally downward so as to take a picture of the luggage 91 placed in the right corner on the back side at the lower part of the measurement storage chamber 51a. The control device 30 (FIG. 3) connected to the image pickup unit 23 has an image processing unit 32 (FIG. 3). The image pickup unit 23 also has a lighting device 25 (see FIG. 3). The lower surface portion 53b of the measurement accommodating chamber 51a is formed of, for example, a metal plate such as iron or steel. The lower surface portion 53b is, for example, silver. The lower surface portion 53b may be another color having no pattern.

The image processing unit 32 measures the dimensions of the luggage 91 from the image including the edge of the luggage 91 acquired by the imaging unit 23. For this purpose, the image processing unit 32 generates a measurement image including an edge representing the boundary line of the luggage 91. At this time, as will be described later, the image processing unit 32 has a line of the reflected image of the luggage 91 appearing on the lower surface portion 53b which is the bottom surface of the measurement accommodation chamber 51a due to the reflection of light, and the lower surface portion 53b of the measurement accommodation chamber 51a. And a threshold is set to distinguish the baggage 91 from the actual boundary line. Then, the image processing unit 32 recognizes that the edge represents the boundary line of the luggage 91 when the difference in brightness between the edge of the image captured by the image pickup unit 23 and the portion adjacent to the edge exceeds the threshold value. .. Then, the image processing unit 32 measures the dimensions of the luggage 91 based on the edge representing the boundary line. As a result, the dimensions of the luggage 91 can be measured more accurately.

FIG. 16 is a flowchart showing a procedure for generating a measurement image for dimension measurement of another embodiment of the embodiment. The measurement image is generated by using the dimension measuring device 20a shown in FIGS. 14 and 15. Hereinafter, the reference numerals of FIGS. 3, 14, and 15 will be used for description. In step S30, the user selects "measurement" on the menu screen of the operation display unit 17a with the door 52a closed without inserting the luggage 91 into the measurement storage chamber 51a.

As a result, in step S31, the control device 30 causes the image pickup unit 23 to take a picture of the measurement storage chamber 51a with the selection operation as a trigger, and acquires the image A which is the image without luggage shown in FIG. 17 from the taken image. do.

Next, in step S32 of FIG. 16, the user substantially contacts the first side surface portion 55a and the second side surface portion 56a in the vicinity of the reference corner portion 58 (FIG. 17) on the lower surface portion 53b of the measurement accommodation chamber 51a. That is, the luggage 91 is placed along the back corner. As a result, the weight measuring unit 78 detects that the cargo 91 is present, and the detection signal is transmitted to the control device 30.

Then, in step S33, when the door 52a is closed while it is detected that the luggage 91 is present, the control device 30 causes the image pickup unit 23 to take a picture of the measurement storage chamber 51a and the luggage 91. Then, the control device 30 acquires the image B, which is the image with luggage shown in FIG. 18, from the captured image. FIG. 18 shows a case where a rectangular parallelepiped luggage 91 is arranged in the measurement storage chamber 51a.

After that, in step S34 of FIG. 16, the control device 30 creates an image C having only the luggage 91 out of the measurement storage chamber 51a and the luggage 91 from the difference between the image A and the image B, as shown in FIG. do. In the image C, three rectangular frames 81, 82, and 83 formed along the respective surfaces of the first side surface portion, the second side surface portion, and the lower surface portion are displayed. For example, the three rectangular frames 81, 82, and 83 are drawn by solid lines having different colors such as red, blue, and green. The rectangular frames 81, 82, and 83 are used by the image processing unit 32 of the control device 30 to determine the position of the edge of the outer shape of the luggage 91.

Next, in step S35 of FIG. 16, in each image in the plane of the rectangular frames 81, 82, 83 corresponding to the first side surface portion, the second side surface portion, and the lower surface portion, the change portion in the image is found and the edge is detected. do. FIG. 20 is a diagram showing a method of detecting an edge from each of the three images in the measurement accommodation chamber in the image C of FIG. 19.

The image processing unit 32 has a plurality of first scanning lines E1 in the planes of the two rectangular frames 81 and 82 corresponding to the first side surface portion 55a (FIG. 17) and the second side surface portion 56a (FIG. 17). And the plurality of second scanning lines E2 are used to scan pixels along the length direction of the edge A1 from the edges A2 and A6 on the side far from the luggage 91 toward the edges A4 and A7 near the luggage 91. Then, the image processing unit 32 finds a change portion such that the brightness in the image changes in each of the planes of the two rectangular frames 81 and 82, and detects the position as the edge T8a and T2a of the load.

Further, the image processing unit 32 is far from the luggage 91 by using the plurality of third scanning lines E3 and the plurality of fourth scanning lines E4 in the plane of the rectangular frame 83 corresponding to the lower surface portion 53b (FIG. 17). Pixels are scanned along the length direction of the edges A4 and A7 from the side edges A9 and A8 toward the edges A7 and A4 near the luggage 91. Then, the image processing unit 32 finds a change portion in the image such as a change in brightness in the plane of the rectangular frame 83, and detects the position as the edges T5a and T4a of the load.

At the same time, the image processing unit 32 is for measuring the luggage 91 based on the difference in brightness between the edges T2a, T4a, T5a, T8a detected for the luggage 91 and the portions adjacent to the edges T2a, T4a, T5a, T8a. The edge representing the boundary line with the surface of the containment chamber 51a is recognized.

FIG. 21 is a diagram highlighting the edges T2a, T4a, T5a, and T8a detected for the load 91 in FIG. 20. FIG. 22 is an enlarged view showing an image of the vicinity of the luggage 91 in FIG. 21. When the image processing unit 32 recognizes the edge of the luggage 91, the line 93 of the reflection image 92 of the luggage 91 that appears on the lower surface of the measurement storage chamber due to the reflection of light, and the lower surface portion of the measurement storage chamber 51a. And a threshold is set to distinguish the baggage 91 from the actual boundary line. Then, the image processing unit 32 recognizes that the edge represents the boundary line of the luggage 91 when the difference in brightness between the edge of the image captured by the image pickup unit 23 and the portion adjacent to the edge exceeds the threshold value. ..

In step S36 of FIG. 16, the edge of the rectangular parallelepiped load 91 is determined from the detected edge, whereby the generation of the measurement image is completed. The image processing unit 32 measures the dimensions of the luggage 91 based on the edges of the measurement image. In steps S36 and subsequent steps of the image processing unit 32, a corrected image in which edge distortion is corrected is acquired in the same manner as in step S14 of FIG. 4, and then the same processing as in steps S15 to S20 of FIG. 4 is performed.

As in step S19 of FIG. 4, when measuring the dimensions of the luggage 91, the outer shape of the luggage 91 calculated from the detected edge and the three rectangular frames 81, 82, 83 created in advance. The dimension of the luggage 91 may be measured from the proportional relationship with the actual dimension between each edge.

In FIG. 22, the difference in brightness is schematically shown by the diagonal grid portion D1, the diagonal line portion D2, the sandy ground portion D3, and the plain portion D4 inside the diagonal grid portion D1. The diagonal grid portion D1 is the darkest, the shaded portion D2, the sandy ground portion D3, and the plain portion D4 are brighter in this order, and the plain portion D4 is the brightest. The plain portion D5 outside the diagonal grid portion D1 is the darkest as in the diagonal grid portion D1. For the sake of simplification of the drawings, the plain portion D5 is not a diagonal grid portion. Further, the difference in brightness between the plain portion D4 inside the diagonal grid portion D1 and the sandy ground portion D3 is larger than the difference in brightness between the sandy ground portion D3 and the diagonal grid portion D1. In FIG. 22, the line 93 of the reflected image 92 of the luggage 91 appears in the plane of the rectangular frame 83 corresponding to the lower surface portion due to the reflection of light.

As the difference in brightness between the edge of the image captured by the image pickup unit 23 and the portion adjacent to the edge, the difference in brightness on both sides of the line 93 of the reflected image 92 does not exceed the threshold value, but the edge T4a at the lower right end of the luggage 91. The difference in brightness between the two sides exceeds the threshold. As a result, the image processing unit 32 recognizes that the edge T4a represents the actual boundary line of the cargo 91.

On the other hand, if the image processing unit 32 does not perform such recognition, the line 93 of the reflected image 92 may be erroneously recognized as an edge representing the boundary of the load 91. In this case, the measurement image generated by using the line 93 does not represent the actual outer shape of the baggage, and when the measurement image is used to measure the dimensions of the baggage, the measurement accuracy deteriorates. .. According to the configuration of this example whose procedure is shown in FIG. 16, such inconvenience can be prevented and the measurement accuracy of the dimensions of the luggage 91 can be improved.

In FIG. 22, both sides of the edge T8a at the upper left end of the luggage 91 are the darkest portions, and the difference in brightness is small, so that the edge T8a may be difficult to recognize as an edge representing the boundary of the luggage 91. There is. On the other hand, the difference in brightness on both sides of the edge T2a at the upper right end of the luggage 91 is large, and the edge T2a can be detected accurately. It is easy to calculate the edge T8a from the parallel relationship with the edge A4. In this example, other configurations and operations are the same as those of FIGS. 1 to 13.

12,12a delivery box, 13,13a exterior, 14, 14a, 14b delivery containment room, 15 doors, 16 operation panel, 17, 17a operation display, 18 electric lock, 19 baggage sensor, 20, 20a dimension measurement Device (measuring device), 23 image pickup unit, 24 camera body, 25 lighting device, 30 control device, 31 arithmetic processing unit, 32 image processing unit, 33 misalignment detection unit, 34 dimension measurement unit, 35 storage unit, 36 interface, 37 Notification unit, 40 Binary image, 41 Corrected image, 51, 51a Measurement accommodation room, 52, 52a Door, 53 Bottom plate, 53a, 53b Bottom surface, 54 Right wall, 55 Left wall, 55a First side surface Part, 56 rear wall part, 56a second side surface part, 57 top plate part, 58 reference corner part, 61 first marker, 62 second marker, 63 third marker, 70 settlement part, 81, 82, 83 rectangular frame, 90 Measured object, 91 Luggage, 92 Reflection image, 93 lines.

Claims (5)

A storage room that can accommodate the object to be measured in and out,
An image pickup unit that captures an image of the object to be measured housed in the storage chamber,
Image processing is performed based on the information of the image captured by the image pickup unit to measure the dimensions of the object to be measured, and the position of the object to be measured from a predetermined position based on the information of the image. An image processing unit that detects the presence or absence of deviation, and
When the image processing unit detects the positional deviation, the image processing unit includes a notification unit for notifying an inquiry as to whether or not to replace the object to be measured.
Delivery box dimension measuring device. In the dimension measuring device for the delivery box according to claim 1,
The image processing unit detects the positional deviation by measuring the change in the length of the scanning line in the image processing direction in the image.
Delivery box dimension measuring device. In the dimension measuring device for the delivery box according to claim 1 or 2.
A reimaging instruction unit for instructing reimaging of the object to be measured when operated is provided.
When the re-imaging instruction unit is operated, the image processing unit re-detects the presence or absence of a positional deviation of the object to be measured from the predetermined position based on the information of the image re-imaged by the imaging unit. do,
Delivery box dimension measuring device. In the dimension measuring device for the delivery box according to any one of claims 1 to 3.
It is arranged as a part of the image pickup unit or as a device different from the image pickup unit, and includes a lighting device for illuminating the accommodation room.
Delivery box dimension measuring device. In the dimension measuring device for the delivery box according to any one of claims 1 to 4.
The image processing unit distinguishes between the line of the reflected image of the object to be measured that appears on the bottom surface of the accommodation chamber due to the reflection of light and the boundary line between the bottom surface of the accommodation chamber and the actual object to be measured. When the difference in brightness between the edge of the image captured by the image pickup unit and the portion adjacent to the edge exceeds the threshold value, it is recognized that the edge represents the boundary line. Measuring the dimensions of the object to be measured based on the edges,
Delivery box dimension measuring device.

Images