Display method and system of laser range finder, computer equipment and program product

Abstract

The invention provides a display method and system of a laser range finder, computer equipment and a program product. The display method comprises the following steps: acquiring a preset video to be displayed; identifying target contour information of a target object in the to-be-displayed video, and extracting the target object according to the target contour information; and performing blurring processing on background information except the target object in the to-be-displayed video, and displaying the target object. Therefore, before the laser range finder displays the to-be-displayed video, the target contour information is identified in the to-be-displayed video, the target object is extracted according to the target contour information, then the background information outside the target object in the to-be-displayed video is blurred, and only the target object is displayed. The influence of the background information on the target object is avoided, and the color difference between the preset video to be displayed and the image of the actual application scene is reduced, so that the visual experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ranging, in particular to a display method and system of a laser range finder, a computer device and a program product. BACKGROUND

[0002] A laser range finder is an instrument for measuring the distance of a target object by using laser. The measurement result is displayed on a display screen for a user to view. In order to improve the user experience, when the laser range finder is used in a golf course, the laser range finder will also display a pre-stored learning video on the display screen, and the user can view the ranging result and the learning video at the same time.

[0003] In the prior art, there is a large color difference between the stored learning video and the image in the actual application scene, which affects the user's visual experience. SUMMARY

[0004] Therefore, it is necessary to provide a display method and system of a laser range finder, a computer device and a program product, which can display only a target object in a to-be-displayed video, reduce the visual conflict of background information in the to-be-displayed video to the user, and improve the user's visual experience.

[0005] In a first aspect, the present application provides a display method of a laser range finder, the display method comprising:

[0006] obtaining a preset to-be-displayed video;

[0007] identifying target contour information of a target object in the to-be-displayed video, and extracting the target object according to the target contour information;

[0008] performing a blurring process on background information in the to-be-displayed video except the target object, and displaying the target object.

[0009] In one of the embodiments, the step of identifying the target contour information of the target object in the to-be-displayed video further comprises:

[0010] performing a grayscale process on the to-be-displayed video;

[0011] inputting the to-be-displayed video after the grayscale process into an identification model, and identifying the target contour information of the target object by the identification model.

[0012] In one of the embodiments, the step of performing the grayscale process on the to-be-displayed video further comprises:

[0013] performing a grayscale process on each frame of data of the to-be-displayed video to obtain grayscale data corresponding to the to-be-displayed video;

[0014] The step of identifying the target contour information of the target object through the identification model after the grayscale processing of the to-be-displayed video input further includes:

[0015] The step of identifying the target contour information of the target object through the identification model after the grayscale processing of the to-be-displayed video input further includes:

[0016] In one embodiment, the step of identifying the target contour information of the target object in the to-be-displayed video further includes:

[0017] Inputting a plurality of sample videos into the identification model;

[0018] Setting identification parameters of the identification model and obtaining training contour information output by the identification model;

[0019] Determining whether the training contour information matches sample contour information of a target object in the sample video;

[0020] If the determination result is no, adjusting the identification parameters and continuing to perform the step of obtaining the training contour information output by the identification model and the subsequent steps until the training contour information matches the sample contour information of the target object in the sample video;

[0021] Storing the identified training contour information.

[0022] In one embodiment, the step of identifying the target contour information of the target object through the identification model further includes:

[0023] Matching the same contour data as the training contour information through the identification model to obtain the target contour information.

[0024] In one embodiment, the step of performing a virtualization process on background information in the to-be-displayed video except the target object and displaying the target object further includes:

[0025] Copying the extracted target object to a new layer and displaying the new layer.

[0026] In one embodiment, the laser range finder includes a display screen for displaying the target object.

[0027] The step of performing a virtualization process on background information in the to-be-displayed video except the target object and displaying the target object further includes:

[0028] Turning off a display switch corresponding to the background information in the display screen and turning on a display switch corresponding to the target object.

[0029] In a second aspect, the present application also provides a display system of a laser range finder, the display system comprising:

[0030] an acquisition module configured to acquire a preset video to be displayed;

[0031] an identification module configured to identify target contour information of a target object in the video to be displayed, and extract the target object according to the target contour information;

[0032] a display module configured to perform a blurring process on background information in the video to be displayed except the target object, and display the target object.

[0033] In a third aspect, the present application also provides a computer device, which comprises a memory and a processor, the memory stores computer readable instructions, and the processor is configured to execute the computer readable instructions to implement the steps of the method described above.

[0034] In a fourth aspect, the present application also provides a computer program product, which comprises a computer program configured to implement the method described above when executed by a computer.

[0035] The above describes a display method, system, computer device and program product of a laser range finder, the display method comprising acquiring a preset video to be displayed; identifying target contour information of a target object in the video to be displayed, and extracting the target object according to the target contour information; performing a blurring process on background information in the video to be displayed except the target object, and displaying the target object. Therefore, the laser range finder of the present application first identifies target contour information in the video to be displayed before displaying the video, extracts a target object according to the target contour information, then performs a blurring process on background information in the video to be displayed except the target object, and only displays the target object, thereby avoiding the influence of the background information on the target object, reducing the color difference between the preset video to be displayed and the image of the actual application scene, and improving the visual experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of a laser range finder provided by an embodiment of the present application;

[0037] Figure 2 is a flowchart of a display method of a laser range finder provided by an embodiment of the present application;

[0038] Figure 3 is a flowchart of another display method of a laser range finder provided by an embodiment of the present application;

[0039] Figure 4 is a flowchart of a display method of a laser range finder provided by an embodiment of the present application;

[0040] Figure 5 is a structural diagram of a display screen provided by an embodiment of the present application;

[0041] Figure 6 is a structural diagram of a display system of a laser range finder provided by an embodiment of the present application;

[0042] Figure 7 is a basic structural block diagram of a computer device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0044] Please refer to Figure 1 , Figure 1 is a structural diagram of a laser range finder provided by an embodiment of the present application. As shown in Figure 1 , the laser range finder 10 of the present embodiment mainly comprises a laser emitter 101, a laser receiver 102, a first optical path assembly 131, a second optical path assembly 132, a first display screen 141, a second display screen 142, an ocular lens 105 and an objective lens 106.

[0045] The laser emitter 101 is configured to emit a laser beam to a measured target. The laser beam is reflected to the objective lens 106 after passing through the measured target, and then is transmitted by the first optical assembly 131 and received by the laser receiver 102. The laser receiver 102 calculates the distance of the measured target according to the time difference between the emission and reception of the laser beam and the speed of the beam, and displays the calculated distance on the first display screen 141, so that the user can view the distance on the first display screen 141 through the ocular lens 105.

[0046] In addition, the laser range finder 10 can also pre-store learning videos. For example, when applied to a golf course, different swing videos corresponding to different distances can be stored for the user to learn and refer. Specifically, the pre-stored learning videos can be output through the second display screen 142, then transmitted by the second optical path assembly 132 and received by the first display screen 141, and finally the first display screen 141 can display the learning videos. Therefore, the user can view the distance and the learning videos on the first display screen 141 through the ocular lens 105.

[0047] However, existing technology directly exports the stored learning videos to the first display screen 141 for display when showing learning videos. Since learning videos are typically produced indoors—for example, golf learning videos usually involve creating an indoor golf environment for video production—or using specific video software to simulate a golf swing, the resulting learning video often has a relatively simple background. Some are green screens, others are simple indoor structures, etc. The color difference between the simple background of the video and the actual environmental background (e.g., an actual golf course) is significant, affecting the user's visual experience. This application provides a display method for a laser rangefinder to solve this visual difference problem. Specifically, please participate in... Figure 2 , Figure 2 This is a schematic flowchart illustrating a display method for a laser rangefinder provided in an embodiment of this application. Figure 2 As shown, the display method in this embodiment includes the following steps:

[0048] Step S1: Obtain the preset video to be displayed.

[0049] Pre-set videos to be displayed can be stored in the memory of the laser rangefinder. These can be learning videos. For example, in golf applications, the laser rangefinder can pre-store multiple swing videos, each corresponding to a distance, which can be the distance between the golf ball and the hole, for users to learn from.

[0050] Step S2: Identify the target contour information of the target object in the video to be displayed, and extract the target object based on the target contour information.

[0051] In golf tutorial videos, target objects can include people, golf balls, golf clubs, and holes. Therefore, the target outline information corresponds to the outlines of the person, the golf ball, the golf club, and the hole.

[0052] Step S3: Blur the background information in the video to be displayed, excluding the target object, and then display the target object.

[0053] Therefore, in this embodiment, before displaying the video to be displayed, the laser rangefinder extracts the target object in the video and blurs the background information in the video, displaying only the target object. This reduces the influence of background information and improves the user's visual experience.

[0054] Please refer to the following: Figure 3 , Figure 3 This is a flowchart illustrating another display method for a laser rangefinder provided in an embodiment of this application. For example... Figure 3 As shown, step S2 above can further include the following steps:

[0055] Step S21: Perform grayscale processing on the video to be displayed.

[0056] Specifically, each frame of the video to be displayed can be processed into grayscale to obtain the grayscale distribution map of each frame. Then, the grayscale distribution maps of all frames can be collected to obtain the grayscale data corresponding to the video to be displayed.

[0057] Step S22: Input the grayscale processed video to be displayed into the recognition model, and use the recognition model to identify the target contour information of the target object.

[0058] Specifically, grayscale data of the video to be displayed can be input into the recognition model, and the target contour information of the target object can be identified by the recognition model.

[0059] Therefore, the target contour information of the target object can be identified based on the recognition model, and the target object can be further extracted based on the target contour information.

[0060] Before identifying the target contour information of the target object in the video to be displayed using the recognition model, the recognition model needs to be trained. Please refer to [link / reference needed] for details. Figure 4 , Figure 4 This is a flowchart illustrating another display method for a laser rangefinder provided in an embodiment of this application, as shown below. Figure 4 As shown, the specific steps include:

[0061] Step S41: Input multiple sample videos into the recognition model.

[0062] Multiple sample videos can be provided based on the actual application scenario of the laser rangefinder. For example, when the laser rangefinder is used on a golf course, multiple sample videos of swings can be provided, including the person, golf club, golf ball, hole, and background information.

[0063] Step S42: Set the recognition parameters of the recognition model and obtain the training contour information output by the recognition model.

[0064] Initial recognition parameters can be set based on experience first, and then the recognition model with the initial recognition parameters set can be used to recognize the sample video to output training contour information, which corresponds to the contour information of the target object in the sample video.

[0065] Step S43: Determine whether the training contour information matches the sample contour information of the target object in the sample video.

[0066] Specifically, the judgment is made on whether the training contour information output by the recognition model matches the sample contour information of the actual target object in the sample video, thereby judging the accuracy of the recognition model. If the judgment result is yes, it means that the training contour information output by the recognition model is very close to the contour information of the actual target object, the recognition model has completed training, and the training ends. If the judgment result is no, it means that the accuracy of the recognition model training needs to be improved, and the process jumps to step S44.

[0067] Step S44: Adjust the recognition parameters. Then return to continue executing steps S42 and S43 until it is determined that the training contour information matches the sample contour information of the target object in the sample video.

[0068] Specifically, since the accuracy of the recognition model is low, the recognition parameters need to be adjusted, and then the sample video is recognized again. The training contour information output by the recognition model is compared with the sample contour information of the actual target object to determine whether they match. Similarly, if they do not match, the loop steps S43 and S44 are repeated until the training contour information output by the recognition model matches the sample contour information of the actual target object.

[0069] Step S45: Store the identified training contour information.

[0070] The identified training contour information is stored as reference information for subsequent use of the laser rangefinder.

[0071] Therefore, in step S2, the target contour information can be obtained by matching the contour data that is the same as the training contour information through the recognition model. That is, after the grayscale data in the video to be displayed is input into the recognition model, the recognition model compares this grayscale data with the stored training contour information and obtains the grayscale data that matches the training contour information. This grayscale data is the target contour information of the target object.

[0072] After obtaining the target contour information, the target object is extracted based on the target contour information. Then, the background information in the video to be displayed, excluding the target object, is blurred, and only the target object is displayed. Specifically, this can include the following methods:

[0073] The first method is to copy the extracted target object to a new layer and display the new layer.

[0074] The new layer can be a layer corresponding to the actual application scenario. For example, in a golf course, the new layer can be the golf course. Target objects, such as people, golf clubs, golf balls, and holes, can be extracted, copied into the golf course, and then blended with the golf course before being displayed. This makes the displayed video more in line with the actual application scenario, reduces the impact of background information in the video on the user's visual experience, and thus improves the user's visual experience.

[0075] The second method is to turn off the display switch for the corresponding background information on the screen and turn on the display switch for the target object. This screen includes at least a first display screen 141, meaning that at least the first display screen 141 performs the operation of turning off the display switch for the background information and turning on the display switch for the target object. Specifically, please participate... Figure 5 , Figure 5 This is a structural diagram of the display screen, such as... Figure 5 As shown, the display screen includes multiple pixel units 51 arranged in a matrix, and each pixel unit displays a color, such as red (R), green (G), and blue (B). Each pixel is electrically connected to a display switch T1, and further, the display switch T1 is electrically connected to a scan line and a data line, respectively. Figure 5 The display switch T1 can be a TFT (Thin Film Transistor) switch. The display screen includes multiple scan lines C1, C2...Cn and multiple data lines D1, D2...Dn. Each scan line is electrically connected to the gate of the display switch T1 corresponding to a row of pixel units, and each data line D1 is electrically connected to the source of the display switch T1 corresponding to a column of pixel units. The drain of the display switch T1 is electrically connected to the pixel unit 51. When the display screen is displaying, scan signals are sequentially transmitted through scan lines C1, C2...Cn to turn on the corresponding display switch T1. At the same time, data signals are transmitted through data lines D1, D2...Dn. The data signals are transmitted to the pixel unit 51 through the turned-on display switch T1 to display the corresponding color. In this embodiment, by controlling the display switch T1 corresponding to the background information to be turned off, the pixel unit corresponding to the background information cannot receive the data signal, thus producing a "black screen" phenomenon, thereby achieving the purpose of blurring the background information. It should be understood that when the display switch T1 corresponding to the target object is turned on, the pixel unit corresponding to the target object can receive the data signal transmitted by the data line, and thus display the target object.

[0076] It should be understood that the display screen in this embodiment can be a liquid crystal display (LCD). Based on the display principle of the LCD, it can be configured as a transmissive display or a reflective display. If it is a transmissive display, it requires a backlight module to provide the light source for display. Therefore, after turning off the display switch for the corresponding background information on the screen, the backlight for the corresponding background information cannot be transmitted to the screen, effectively blocking the backlight of the corresponding background information and achieving the effect of displaying only the target object. If it is a reflective display, it does not require a backlight module to provide the light source and mainly achieves the display purpose through external natural light. Therefore, after turning off the display switch for the corresponding background information on the screen, the natural light for the corresponding background information cannot be transmitted to the screen, and the display screen corresponding to the background information displays a black underlying image. Meanwhile, the display screen corresponding to the target object, because its display switch is normally on, displays the target object normally.

[0077] This application also provides a display system for a laser rangefinder, applied to the display method of the laser rangefinder described above. Please refer to the following for details. Figure 6 The display system 600 includes an acquisition module 601, an identification module 602, and a display module 603.

[0078] The module 601 is used to obtain a preset video to be displayed.

[0079] Pre-set videos to be displayed can be stored in the memory of the laser rangefinder. These can be learning videos. For example, in golf applications, the laser rangefinder can pre-store multiple swing videos, each corresponding to a distance, which can be the distance between the golf ball and the hole, for users to learn from.

[0080] The recognition module 602 is used to recognize the target contour information of the target object in the video to be displayed, and to extract the target object based on the target contour information.

[0081] In golf tutorial videos, target objects can include people, golf balls, golf clubs, and holes. Therefore, the target outline information corresponds to the outlines of the person, the golf ball, the golf club, and the hole.

[0082] The recognition module 602 performs grayscale processing on the video to be displayed, and then inputs the grayscale-processed video into the recognition model. The recognition model then identifies the target contour information of the target object. Specifically, each frame of the video to be displayed is processed in grayscale to obtain a grayscale distribution map for each frame. The grayscale distribution maps of all frames are then collected to obtain the grayscale data corresponding to the video to be displayed. This grayscale data is then input into the recognition model, which identifies the target contour information of the target object.

[0083] Therefore, the recognition module 602 can identify the target contour information of the target object according to the recognition model, and further extract the target object based on the target contour information.

[0084] Before identifying the target contour information of the target object in the video to be displayed through the recognition model, the recognition model needs to be trained. The specific training process is as described above and will not be repeated here.

[0085] The display module 603 is used to blur the background information in the video to be displayed, excluding the target object, and then display the target object.

[0086] Specifically, the display module 603 may display the target object in the following two ways:

[0087] The first method is to copy the extracted target object to a new layer and display the new layer.

[0088] The new layer can be a layer corresponding to the actual application scenario. For example, in a golf course, the new layer can be the golf course. Target objects, such as people, golf clubs, golf balls, and holes, can be extracted, copied into the golf course, and then blended with the golf course before being displayed. This makes the displayed video more in line with the actual application scenario, reduces the impact of background information in the video on the user's visual experience, and thus improves the user's visual experience.

[0089] The second method is to turn off the display switch for the corresponding background information on the screen and turn on the display switch for the target object. The specific display process is as described above and will not be repeated here.

[0090] To address the aforementioned technical problems, embodiments of this application also provide a computer device. Please refer to [link / reference needed]. Figure 7 , Figure 7 This is a basic structural block diagram of the computer device in this embodiment.

[0091] The computer device 6 includes a memory 61, a processor 62, and a network interface 63 that are interconnected via a system bus. It should be noted that only the computer device 6 with components 61-63 is shown in the figure; however, it should be understood that it is not required to implement all the shown components, and more or fewer components can be implemented alternatively. Those skilled in the art will understand that the computer device described here is a device capable of automatically performing numerical calculations and / or information processing according to pre-set or stored instructions. Its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits (ASICs), programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0092] The computer device can be a desktop computer, laptop, handheld computer, or cloud server, etc. The computer device can interact with the user via a keyboard, mouse, remote control, touchpad, or voice control.

[0093] The memory 61 includes at least one type of readable storage medium, including flash memory, hard disk, multimedia card, card-type memory (e.g., SD or DX memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 61 may be an internal storage unit of the computer device 6, such as the hard disk or memory of the computer device 6. In other embodiments, the memory 61 may also be an external storage device of the computer device 6, such as a plug-in hard disk, smart memory card (SMC), secure digital card (SD) card, flash memory card, etc. Of course, the memory 61 may include both the internal storage unit and the external storage device of the computer device 6. In this embodiment, the memory 61 is typically used to store the operating system and various information management operating systems installed on the computer device 6, such as computer-readable instructions for the display method of a laser rangefinder. In addition, the memory 61 can also be used to temporarily store various types of data that have been output or will be output.

[0094] In some embodiments, the processor 62 may be a central processing unit (CPU), controller, microcontroller, microprocessor, or other data processing chip. The processor 62 is typically used to control the overall operation of the computer device 6. In this embodiment, the processor 62 is used to execute computer-readable instructions stored in the memory 61 or to process data, such as computer-readable instructions for a laser rangefinder's display method.

[0095] The network interface 63 may include a wireless network interface or a wired network interface, which is typically used to establish communication connections between the computer device 6 and other electronic devices.

[0096] This application also provides another embodiment, namely, a computer program product storing computer-readable instructions that can be executed by at least one processor to cause the at least one processor to perform the steps of the display method of the laser rangefinder as described above.

[0097] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0098] This application provides a display method, system, computer device, and program product for a laser rangefinder. The display method includes acquiring a preset video to be displayed; identifying target contour information of a target object in the video to be displayed, and extracting the target object based on the target contour information; blurring the background information in the video to be displayed except for the target object, and then displaying the target object. Therefore, before displaying the video to be displayed, the laser rangefinder of this application first identifies target contour information in the video to be displayed, extracts the target object based on the target contour information, and then blurs the background information outside the target object in the video to be displayed, displaying only the target object. This avoids the influence of background information on the target object, reduces the color difference between the preset video to be displayed and the image of the actual application scene, thereby improving the user's visual experience.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display method of a laser range finder, characterized by, The display method comprises: acquiring a preset to-be-displayed video; identifying target contour information of a target object in the to-be-displayed video, and extracting the target object according to the target contour information; performing a blurring process on background information in the to-be-displayed video except the target object, and displaying the target object.

2. The display method according to claim 1, wherein The step of identifying the target contour information of the target object in the to-be-displayed video further comprises: performing a grayscale process on the to-be-displayed video; inputting the to-be-displayed video after the grayscale process into an identification model to identify the target contour information of the target object by the identification model.

3. The display method according to claim 2, wherein The step of performing a grayscale process on the to-be-displayed video further comprises: performing a grayscale process on each frame of data of the to-be-displayed video to acquire grayscale data corresponding to the to-be-displayed video; The step of inputting the to-be-displayed video after the grayscale process into an identification model to identify the target contour information of the target object by the identification model further comprises: inputting the grayscale data into the identification model to identify the target contour information of the target object by the identification model.

4. The display method according to claim 2 or 3, wherein Before the step of identifying the target contour information of the target object in the to-be-displayed video, the method further comprises: inputting a plurality of sample videos into the identification model; setting identification parameters of the identification model, and acquiring training contour information output by the identification model; judging whether the training contour information matches sample contour information of a target object in the sample videos; if the result of the judgment is no, adjusting the identification parameters, and continuing to perform the step of acquiring the training contour information output by the identification model and the steps thereafter until the training contour information matches the sample contour information of the target object in the sample videos; storing the identified training contour information.

5. The display method according to claim 4, wherein The step of identifying the target contour information of the target object by the identification model comprises: matching, by the identification model, contour data identical to the training contour information to obtain the target contour information.

6. The display method according to claim 1, wherein The step of performing a blurring process on background information in the to-be-displayed video except the target object, and displaying the target object comprises: copying the extracted target object to a new layer, and displaying the new layer.

7. The display method according to claim 1, wherein The laser range finder comprises a display screen for displaying the target object; The step of performing a blurring process on background information in the to-be-displayed video except the target object, and displaying the target object comprises: turning off a display switch corresponding to the background information in the display screen, and turning on a display switch corresponding to the target object.

8. A display system for a laser range finder, characterized by The display system comprises: an acquisition module configured to acquire a preset to-be-displayed video; an identification module configured to identify target contour information of a target object in the to-be-displayed video, and extract the target object according to the target contour information; a display module configured to perform a blurring process on background information in the to-be-displayed video except the target object, and display the target object.

9. A computer device, comprising: The computer device comprises a memory having computer readable instructions stored therein and a processor configured to implement the steps of the method of any one of claims 1 to 7 when executing the computer readable instructions.

10. A computer program product, characterised in that, The computer program product comprises a computer program configured to implement the method of any one of claims 1 to 7 when executed by a computer.

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