Illumination control method, program, and illumination control system

Abstract

The purpose of the present disclosure is to improve the adjustment accuracy of a lighting scene. This lighting control method has an acquisition step and a reflection step. During the acquisition step, a reference image obtained by imaging a prescribed lighting scene, which is in a reference space serving as a reference for adjustment of a lighting scene, is acquired. During the reflection step, the reference image is compared to a captured image, which is obtained by imaging a current lighting scene in a target space serving as a target for adjustment of the lighting scene, and a plurality of light fixtures that light the target space are controlled on the basis of the comparison results. In the lighting control method, the reflection step is repeated until the difference between the reference image and the captured image falls below a prescribed index.

Description

[Technical field]

[0001] The present disclosure relates generally to a lighting control method, program and lighting control system, and more particularly to a lighting control method, program and lighting control system for adjusting a lighting scene. [Background technology]

[0002] Patent Document 1 is an example of a document related to the adjustment of lighting scenes. The spatial plan proposal system described in Patent Document 1 includes an input unit, a database unit, and an extraction unit. The input unit acquires evaluation values ​​of affective words by receiving input from a user. The database unit has a plurality of spatial images in which an arrangement pattern of one or more lighting fixtures in a space, a dimming pattern of one or more lighting fixtures for forming a lighting scene of the space, and evaluation information based on the evaluation values ​​of each of the one or more affective words are associated with each other. The extraction unit extracts the spatial image associated with the evaluation information from the database unit as a first proposed image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-175019 A Summary of the Invention

[0004] An object of the present disclosure is to provide a lighting control method, a program, and a lighting control system that can improve the accuracy of adjusting a lighting scene.

[0005] A lighting control method according to an aspect of the present disclosure includes an acquisition step and a reflection step. In the acquisition step, a reference image is acquired, which is an image of a predetermined lighting scene in a reference space that is a reference for adjusting the lighting scene. In the reflection step, a captured image of a current lighting scene in a target space that is a target for adjusting the lighting scene is compared with the reference image, and a plurality of lighting devices that illuminate the target space are controlled based on the comparison result. In the lighting control method, the reflection step is repeated until a difference between the reference image and the captured image falls below a predetermined index.

[0006] A lighting control method according to another aspect of the present disclosure repeats a reflection step until a difference between a reference image and a captured image falls below a predetermined index. In the reflection step, a plurality of lighting devices illuminating a target space are controlled based on a comparison result between the reference image and the captured image. The reference image is an image of a predetermined lighting scene in a reference space that is a reference for adjusting a lighting scene. The captured image is an image of a current lighting scene in the target space that is a target for adjusting the lighting scene.

[0007] A program according to one aspect of the present disclosure is a program for causing one or more processors to execute the lighting control method.

[0008] A lighting control system according to an aspect of the present disclosure includes an acquisition unit and a reflection unit. The acquisition unit acquires a reference image of a predetermined lighting scene in a reference space that is a reference for adjusting a lighting scene. The reflection unit repeats a reflection step until a difference between the reference image and a captured image falls below a predetermined index. In the reflection step, the captured image of a current lighting scene in a target space that is a target for adjusting the lighting scene is compared with the reference image, and a plurality of lighting devices that illuminate the target space are controlled based on a comparison result. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a flowchart illustrating a lighting control method according to an embodiment. [Diagram 2] FIG. 2 is a block diagram of a system for implementing the above lighting control method. [Diagram 3] FIG. 3 is a diagram showing a reference image referred to in the above-mentioned lighting control method. [Figure 4] FIG. 4 is a diagram showing a captured image referred to in the above illumination control method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a lighting control method, a program, and a lighting control system according to an embodiment will be described with reference to the drawings. However, the following embodiment is merely one of various embodiments of the present disclosure. The following embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved.

[0011] (overview) The lighting control method of the present embodiment is a method for controlling a plurality of lighting fixtures 5 (see FIG. 4) that illuminate a target space SP5 (see FIG. 4) to realize a desired lighting scene. The lighting scene is a spatial presentation realized by a plurality of lighting fixtures 5. More specifically, the lighting control method is a method for controlling a plurality of lighting fixtures 5 that illuminate the target space SP5 so as to make the lighting scene of the target space SP5 closer to (similar to) a predetermined lighting scene of a reference space SP6 (see FIG. 3). More specifically, the lighting control method is a method for adjusting the lighting scene of the target space SP5 by comparing a reference image Im6 that captures a predetermined lighting scene in the reference space SP6 with a captured image Im5 that captures the lighting scene of the target space SP5.

[0012] The target space SP5 is at least a part of a space in a facility. In the present disclosure, the "facility" is, for example, a house, a store, an office building, a factory, a commercial complex, a library, an art gallery, a museum, an amusement facility, a theme park, a park, an airport, a train station, a stadium, a hotel, a hospital, etc. In addition, the "facility" may be, for example, a moving body such as a ship or a railroad car.

[0013] Furthermore, the reference space SP6 is a space different from the target space SP5. The reference space SP6 is a facility different from the facility to which the target space SP5 belongs, or a space in the same facility. The reference space SP6 and the target space SP5 have the same or similar interior. If the reference space SP6 and the target space SP5 are stores, the facility to which the reference space SP6 belongs and the facility to which the target space SP5 belongs are, for example, related stores, chain stores, or sister stores.

[0014] In this embodiment, it is assumed that the arrangement of the multiple lighting fixtures 5 that illuminate the target space SP5 corresponds to the arrangement of the two or more lighting fixtures 6 (see FIG. 3) that illuminate the reference space SP6. It is most preferable that the former arrangement matches the latter arrangement. In this embodiment, it is assumed that the relationship between the position and orientation of the imaging device 3 (see FIG. 2) that captures the target space SP5 and the positions of the multiple lighting fixtures 5 that illuminate the target space SP5 corresponds to the relationship between the position and orientation of the imaging device that captures the reference space SP6 and the positions of the two or more lighting fixtures 6 that illuminate the reference space SP6. It is most preferable that the former relationship matches the latter relationship.

[0015] However, the arrangement of the two or more lighting fixtures 6 in the reference space SP6 may differ to some extent from the arrangement of the multiple lighting fixtures 5 in the target space SP5. In addition, the relationship between the position and orientation of the imaging device and the positions of the lighting fixtures 5, 6 may differ to some extent between the reference space SP6 and the target space SP5. The greater the difference, the greater the error when adjusting the lighting scene in the target space SP5. Therefore, differences are acceptable as long as the error is within an allowable range.

[0016] Furthermore, it is preferable that the imaging specifications (for example, aperture setting, exposure time, etc.) be consistent when imaging the reference space SP6 and when imaging the target space SP5.

[0017] The lighting control method of this embodiment includes an acquisition step and a reflection step. In the acquisition step, a reference image Im6 is acquired, which is an image of a predetermined lighting scene in a reference space SP6 that is a reference for adjusting the lighting scene. In the reflection step, a captured image Im5 is acquired, which is an image of a current lighting scene in a target space SP5 that is a target for adjusting the lighting scene, and the reference image Im6 is compared, and a plurality of lighting devices 5 that illuminate the target space SP5 are controlled based on the comparison result. In the lighting control method, the reflection step is repeated until the difference between the reference image Im6 and the captured image Im5 falls below a predetermined index. Steps ST4 to ST14 in FIG. 1 are an example of a series of steps from the start of the reflection step to the end of the repetition of the reflection step.

[0018] According to the lighting control method of the present embodiment, it is possible to control the lighting devices 5 so as to bring the lighting scene in the target space SP5 closer to a predetermined lighting scene in the reference space SP6. Moreover, compared to a case where an operator performs similar control while visually checking the lighting scene in the target space SP5, the adjustment of the lighting scene is less dependent on the operator's senses and skills. Thus, according to the above configuration, it is possible to improve the accuracy of the adjustment of the lighting scene.

[0019] It should be noted that the sequence shown in FIG. 1 merely illustrates one example of the lighting control method according to the present disclosure, and the order of processes may be changed as appropriate, and processes may be added or omitted as appropriate.

[0020] The program of the present embodiment is a program for causing one or more processors to execute the above-described lighting control method. The program may be recorded in a non-transitory computer-readable recording medium.

[0021] The above lighting control method can be realized by a lighting control system 1. That is, as shown in Fig. 2, the lighting control system 1 includes an acquisition unit 22 and a reflection unit 23. The acquisition unit 22 acquires a reference image Im6 obtained by capturing a predetermined lighting scene in a reference space SP6 that is a reference for adjusting the lighting scene. The reflection unit 23 repeats the reflection step until the difference between the reference image Im6 and the captured image Im5 falls below a predetermined index. In the reflection step, the captured image Im5 obtained by capturing a current lighting scene in a target space SP5 that is a target for adjusting the lighting scene is compared with the reference image Im6, and the plurality of lighting fixtures 5 that illuminate the target space SP5 are controlled based on the comparison result.

[0022] (detail) (1) Overall structure Below, a detailed description is given of the lighting control system 1 and various devices associated with the lighting control system 1. Hereinafter, a configuration including the lighting control system 1 and various devices associated with the lighting control system 1 is referred to as an integrated system 100 (see FIG. 2).

[0023] As shown in FIG. 2, the integrated system 100 includes a lighting control system 1, an imaging device 3, a controller 4, and a plurality of lighting fixtures 5.

[0024] The controller 4 and the plurality of lighting fixtures 5 are installed in a facility. The controller 4 transmits control signals for controlling the plurality of lighting fixtures 5 to the plurality of lighting fixtures 5 via wired communication or wireless communication.

[0025] The lighting control system 1 includes, for example, a server computer. The lighting control system 1 is installed, for example, in a location separate from a facility in which a plurality of lighting fixtures 5 are installed.

[0026] The imaging device 3 is, for example, a mobile terminal 3A. The mobile terminal 3A is a mobile phone such as a smartphone, a tablet terminal, etc. The worker can carry the imaging device 3 with him or her.

[0027] (2) Lighting control system The lighting control system 1 includes a computer system having one or more processors and a memory. At least some of the functions of the lighting control system 1 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunication line such as the Internet, or may be provided by recording it on a non-transitory recording medium such as a memory card.

[0028] The lighting control system 1 includes a processing unit 2, a communication unit 11, and a storage unit 12. The processing unit 2 includes one or more processors described above. The processing unit 2 performs overall control of the lighting control system 1. The processing unit 2 has a linking unit 21, an acquisition unit 22, a reflection unit 23, and a registration unit 24. Note that the linking unit 21, the acquisition unit 22, the reflection unit 23, and the registration unit 24 merely indicate functions realized by the processing unit 2, and do not necessarily indicate actual configurations.

[0029] The communication unit 11 includes a communication interface device. The communication unit 11 is connectable to a network via the communication interface device. The communication unit 11 is also capable of communicating with the imaging device 3 and the controller 4 via the communication interface device. In this disclosure, "capable of communication" means that signals can be transmitted and received directly or indirectly via a network or a repeater, etc., by an appropriate communication method such as wired communication or wireless communication.

[0030] The storage unit 12 is, for example, a Read Only Memory (ROM), a Random Access Memory (RAM), an Electrically Erasable Programmable Read Only Memory (EEPROM), etc. The storage unit 12 stores information used in the lighting control system 1. The information stored in the storage unit 12 is, for example, a reference image Im6, a captured image Im5, and a program executed by the processing unit 2, etc.

[0031] As described above, the acquisition unit 22 acquires the reference image Im6. More specifically, the acquisition unit 22 acquires the reference image Im6 via the communication unit 11. Furthermore, the acquisition unit 22 acquires the captured image Im5 from the imaging device 3. More specifically, the acquisition unit 22 acquires the captured image Im5 via the communication unit 11. The reflection unit 23 controls the multiple lighting devices 5 based on a comparison result between the captured image Im5 and the reference image Im6.

[0032] As described below, the linking unit 21 executes a linking step of linking the position information of the plurality of lighting fixtures 5 with the linking information. The registration unit 24 registers, as a registered scene, a lighting scene realized by the reflection unit 23 controlling the plurality of lighting fixtures 5. More specifically, the registration unit 24 stores the registered scene in the storage unit 12.

[0033] (3) Imaging device The imaging device 3 includes a communication unit 31, a storage unit 32, an imaging unit 33, a processing unit , an input IF (input interface) 35, and an output IF (output interface) .

[0034] The communication unit 31 includes a communication interface device. The communication unit 31 is connectable to a network via the communication interface device. The communication unit 31 is also capable of communicating with the lighting control system 1 and the controller 4 via the communication interface device.

[0035] The storage unit 32 is, for example, a ROM, a RAM, an EEPROM, etc. The storage unit 32 stores information used by the imaging device 3. The information stored in the storage unit 32 is, for example, a captured image Im5 generated by the imaging unit 33.

[0036] The imaging unit 33 is, for example, a two-dimensional image sensor such as a CCD (Charge Coupled Devices) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor. The imaging unit 33 generates a captured image Im5. The captured image Im5 generated by the imaging unit 33 may be a black and white image or a color image. The captured image Im5 generated by the imaging unit 33 may be a still image or a moving image. The captured image Im5 is transmitted to the lighting control system 1 via the communication unit 31.

[0037] The imaging unit 33 captures the target space SP5 multiple times to generate multiple captured images Im5. It is preferable that the imaging device 3 is fixed using a fixing member such as a tripod so that the imaging unit 33 captures the target space SP5 at the same position and in the same orientation every time.

[0038] The imaging device 3 includes a computer system having one or more processors and a memory. At least some of the functions of the imaging device 3 are realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunication line such as the Internet, or may be provided by recording it on a non-transitory recording medium such as a memory card.

[0039] The processing unit 34 includes one or more processors as described above. The processing unit 34 performs overall control of the imaging device 3.

[0040] The input IF 35 accepts operations by a user (operator). The processing unit 34 performs various processes in response to the operations performed on the input IF 35. The input IF 35 includes at least one of, for example, a touch panel, a touch panel display, a button, a keyboard, and a microphone.

[0041] The output IF 36 presents information to a user (operator). The output IF 36 includes at least one of a display, a touch panel display, and a speaker, for example. The touch panel display of the input IF 35 may also serve as the touch panel display of the output IF 36.

[0042] (4) Controller The controller 4 includes a computer system having one or more processors and a memory. At least a part of the functions of the controller 4 is realized by the processor of the computer system executing a program recorded in the memory of the computer system. The program may be recorded in the memory, or may be provided via a telecommunication line such as the Internet, or may be provided by recording it on a non-transitory recording medium such as a memory card.

[0043] The controller 4 includes a processing unit 43, a communication unit 41, and a storage unit .

[0044] The processing unit 43 includes one or more processors as described above. The processing unit 43 performs overall control of the controller 4.

[0045] The communication unit 41 includes a communication interface device. The communication unit 41 is connectable to a network via the communication interface device. The communication unit 41 is also capable of communicating with the multiple lighting fixtures 5, the lighting control system 1, and the imaging device 3 via the communication interface device.

[0046] The storage unit 42 is, for example, a ROM, a RAM, an EEPROM, etc. The storage unit 42 stores information used by the controller 4. The information stored in the storage unit 42 is, for example, identification information of each lighting fixture 5.

[0047] The controller 4 assigns a device ID as identification information to each of the multiple lighting fixtures 5. A different device ID is assigned to each lighting fixture 5. The process of assigning the device ID is performed automatically by the controller 4. The storage unit 42 of the controller 4 stores a correspondence table showing the correspondence between the device ID assigned to each lighting fixture 5 and the communication address of each lighting fixture 5. The process of assigning the device ID is performed, for example, when multiple lighting fixtures 5 and the controller 4 are installed in a facility and communication between the multiple lighting fixtures 5 and the controller 4 is established.

[0048] (5) Multiple lighting fixtures A plurality of lighting fixtures 5 are installed in a facility. The plurality of lighting fixtures 5 have a communication function.

[0049] The lighting fixtures 5 are controlled by control signals transmitted from the controller 4. The control signals include communication addresses of the lighting fixtures 5 to be controlled.

[0050] The controller 4 stores, for example, a correspondence table showing the correspondence between the device ID as identification information of each lighting fixture 5 and the communication address of each lighting fixture 5. The address is assigned to the lighting fixture 5 at the manufacturing stage of the lighting fixture 5. The address is, for example, a MAC address. The controller 4 refers to the correspondence table, replaces the device ID with the corresponding address, creates a control signal including the address, and transmits this control signal to the multiple lighting fixtures 5. When the address included in the received control signal matches the address stored in the lighting fixture 5, each lighting fixture 5 acquires the information included in the control signal and is controlled according to the control signal. When the address included in the received control signal does not match the address stored in the lighting fixture 5, each lighting fixture 5 discards the information included in the control signal.

[0051] (6) Identification of multiple lighting fixtures An example of the procedure of the lighting control method according to the present disclosure will be described below with reference to Figures 1, 3 and 4. It is assumed that a reference image Im6 (see Figure 3) is captured in advance in a reference space SP6 and stored in the storage unit 12 of the lighting control system 1.

[0052] As a premise, the relationship between the position and orientation of the imaging device 3 that captures the target space SP5 and generates a captured image Im5 (see FIG. 4) and the positions of the multiple lighting fixtures 5 that illuminate the target space SP5 corresponds to the relationship between the position and orientation of the imaging device that captures the reference space SP6 and generates a reference image Im6 and the positions of the two or more lighting fixtures 6 that illuminate the reference space SP6. Therefore, as shown in FIGS. 3 and 4, the arrangement of the two or more lighting fixtures 6 captured in the reference image Im6 matches or is similar to the arrangement of the multiple lighting fixtures 5 captured in the captured image Im5.

[0053] First, the linking step (steps ST1 to ST3) of linking a plurality of lighting fixtures 5 will be described.

[0054] In the linking step, images captured by changing the lighting state of each of the lighting devices 5 in the target space SP5 are compared with the reference image Im6. Furthermore, in the linking step, the position information and identification information of the lighting devices 5 illuminating the target space SP5 are linked based on the comparison result. The linking step is executed by the linking unit 21.

[0055] More specifically, first, the worker operates the imaging device 3, and in response, the imaging device 3 transmits a predetermined signal to the lighting control system 1. Then, the lighting control system 1 transmits a command signal to the controller 4. Upon receiving the command signal, the controller 4 transmits a control signal including an address of one of the lighting devices 5. This control signal includes a command for changing the lighting state of the one lighting device 5. That is, this causes a change in the lighting state of the one lighting device 5. The change in the lighting state means, for example, that the one lighting device 5 blinks, that the dimming level changes, that the lighting device 5 goes from an off state to an on state, that the lighting device goes from a on state to an off state, or that the color temperature changes. In this embodiment, the one lighting device 5 blinks in response to the control signal (step ST1). That is, the control signal is a signal for blinking the lighting device 5 to be controlled.

[0056] When the lighting state of the lighting fixture 5 to be controlled changes, the worker captures an image with the imaging device 3 at a position and orientation corresponding to the position and orientation at which the reference image Im6 was captured (step ST2). More specifically, the imaging device 3 captures images multiple times at intervals. Capturing an image when the lighting state changes includes both starting imaging before the state changes and starting imaging after the state changes.

[0057] For example, imaging device 3 captures images at one second intervals. The interval between capturing an image and the next image is preferably shorter than the period during which lighting device 5 blinks in step ST1.

[0058] The captured image Im5 is transmitted to the lighting control system 1. The linking unit 21 identifies the positions of the lighting fixtures 5 in the captured image Im5 by comparing the captured image Im5 of the current lighting scene in the target space SP5 with the reference image Im6. Note that the captured image Im5 of the current lighting scene is the most recent captured image Im5 read by the lighting control system 1.

[0059] More specifically, since the lighting fixture 5 to be controlled blinks in step ST1, the lighting fixture 5 to be controlled is turned off in some of the captured images Im5 generated by successively capturing images. The linking unit 21 generates a difference image between the captured image Im5 in which the lighting fixture 5 to be controlled is turned off and the reference image Im6. The linking unit 21 determines that an area in the difference image that has a luminance greater than a predetermined luminance and a size greater than a predetermined size is an area in which the lighting fixture 5 to be controlled is installed. The position of each lighting fixture 5 in the captured image Im5 corresponds to the position of each lighting fixture 6 in the reference image Im6. Therefore, the above process of identifying the position of each lighting fixture 5 in the captured image Im5 is also a process of identifying the position of each lighting fixture 6 in the reference image Im6.

[0060] When changing the lighting state of the lighting fixture 5 to be controlled (making it blink), the controller 4 includes an address corresponding to the device ID of the lighting fixture 5 to be controlled in the control signal. The lighting fixture 5 whose lighting state has changed in step ST1 is the lighting fixture 5 to which this device ID has been assigned, among the multiple lighting fixtures 5. Therefore, the linking unit 21 can link the device ID (identification information) of the lighting fixture 5 to be controlled with the location information (step ST3). By sequentially setting the multiple lighting fixtures 5 as lighting fixtures 5 to be controlled, it is possible to link the location information with the identification information for each of the multiple lighting fixtures 5.

[0061] Linking the location information with the identification information enables the controller 4 to control a lighting fixture 5 at a desired location among the multiple lighting fixtures 5. For example, when the surroundings of a lighting fixture 5 installed at a certain location in the captured image Im5 (see FIG. 4) are dark, the controller 4 can adjust the brightness of the lighting fixture 5 autonomously or in response to an operation by an operator to brighten the lighting fixture 5.

[0062] (7) Dimming multiple lighting fixtures After the location information and the identification information are associated with each other, the following reflection steps are executed (steps ST4 to ST14). First, the controller 4 adjusts the brightness of the lighting fixtures 5 that illuminate the target space SP5 (step ST4). In step ST4, the controller 4 controls the lighting fixtures 5 so that the brightness and color temperature of the lighting fixtures 5 become default values.

[0063] Next, the worker captures an image of the target space SP5 using the imaging device 3 (step ST5). As a result, a captured image Im5 is newly generated. The acquisition unit 22 of the lighting control system 1 acquires the newly generated captured image Im5 from the imaging device 3. The reflection unit 23 generates a difference image between the captured image Im5 and a reference image Im6.

[0064] The reflection unit 23 also obtains bright regions. The bright regions are regions in the captured image Im5 whose luminance is greater than a predetermined brightness threshold. More specifically, the reflection unit 23 divides a part or the whole of the captured image Im5 into a plurality of sections (sections d1, d2, d3, d4, ... (see FIG. 4)) and calculates the average luminance of each section. The size of each section is, for example, 10 pixels x 10 pixels. The reflection unit 23 regards a set of sections whose average luminance is greater than a predetermined brightness threshold as a bright region. In FIG. 4, the plurality of bright regions are represented by dashed lines P1. In FIG. 3, the regions in the reference image Im6 corresponding to the plurality of bright regions in the captured image Im5 are represented by dashed lines Q1. The bright regions may be obtained based on the luminance of each section in the reference image Im6.

[0065] The reflection unit 23 compares the bright area of ​​the captured image Im5 with an area of ​​the reference image Im6 corresponding to the bright area of ​​the captured image Im5. The reflection unit 23 controls the plurality of lighting devices 5 that illuminate the target space SP5 based on the comparison result. More specifically, if a difference Def1 in luminance between a predetermined bright area (an area of ​​one dashed line P1) of the captured image Im5 and an area of ​​the reference image Im6 corresponding to the predetermined bright area of ​​the captured image Im5 (an area of ​​the corresponding dashed line Q1) is greater than a threshold value Th1 (step ST6: Yes), the reflection unit 23 performs a first feedback dimming (step ST7). The first feedback dimming is a process of dimming the plurality of lighting devices 5 so as to reduce the difference between the difference Def1 and the threshold value Th1. For example, in the first feedback dimming, the dimming rate of the lighting device 5 installed in the vicinity of the predetermined bright area is changed to increase or decrease the luminance of the predetermined bright area in the target space SP5.

[0066] That is, the reflection step of the lighting control method of this embodiment includes a bright area reflection step, in which the captured image Im5 is compared with the reference image Im6 for areas in the reference image Im6 or the captured image Im5 whose luminance is greater than a predetermined bright threshold value. Furthermore, in the bright area reflection step, the lighting fixtures 5 that illuminate the target space SP5 are controlled based on the comparison result.

[0067] The bright area reflecting step increases or decreases the luminance of each of the multiple bright areas. For example, in FIG. 4, dashed lines P1 are shown in four locations representing the bright areas. The multiple lighting devices 5 are controlled to change the dimming ratio so as to increase or decrease the luminance of each of the four bright areas. The amount of change in luminance is determined for each bright area.

[0068] After performing the first feedback dimming, the process returns to step ST5. The operator captures the target space SP5 using the imaging device 3. As a result, a new captured image Im5 is generated. For each bright area, steps ST5 to ST7 are repeated until the luminance difference Def1 between the reference image Im6 and the captured image Im5 becomes equal to or less than the threshold value Th1 (until the result of step ST6 becomes "No"). When the difference Def1 becomes equal to or less than the threshold value Th1, the process proceeds to step ST8.

[0069] In FIG. 4, the luminance of the region P4 where the window through which the light enters is provided is relatively high. However, even if the light of the multiple lighting devices 5 is adjusted, the luminance of the region P4 cannot be sufficiently adjusted. Therefore, in order to prevent the region P4 from being selected as a bright region, the reflecting unit 23 may select the bright region from the region where the lighting device 5 is installed and the region nearby. In this case, the bright region is a region whose luminance is greater than a predetermined brightness threshold and is the region where the lighting device 5 is installed or the region nearby. Alternatively, the region where the window is provided and the region nearby may be removed by trimming in at least one of the reference image Im6 and the captured image Im5. Alternatively, the target space SP5 may be imaged at night so that light does not enter through the window, or the target space SP5 may be imaged with the window blocked.

[0070] Prior to step ST8, the reflection unit 23 obtains a reflection area. The reflection area is an area in the captured image Im5 where light from at least some of the lighting devices 5 is reflected. For example, the reflection unit 23 determines, as the reflection area, a set of sections (sections d1, d2, d3, d4, ...) that are a certain distance or more from the area where the lighting devices 5 are installed and have an average brightness greater than a predetermined reflection threshold. In FIG. 4, the reflection area is represented by a dashed line P2. In FIG. 3, an area in the reference image Im6 that corresponds to the reflection area of ​​the captured image Im5 is represented by a dashed line Q2. The reflection area may be obtained based on the brightness of each section of the reference image Im6. A plurality of reflection areas may be obtained.

[0071] In step ST8, the reflecting unit 23 compares the reflection area of ​​the captured image Im5 with an area of ​​the reference image Im6 that corresponds to the reflection area of ​​the captured image Im5. The reflecting unit 23 controls the plurality of lighting devices 5 that illuminate the target space SP5 based on the comparison result. More specifically, if a difference Def2 in brightness between a predetermined reflection area of ​​the captured image Im5 and an area of ​​the reference image Im6 that corresponds to the predetermined reflection area of ​​the captured image Im5 is greater than a threshold Th2 (step ST8: Yes), the reflecting unit 23 performs second feedback dimming (step ST9). The second feedback dimming is a process of dimming the plurality of lighting devices 5 so as to reduce the difference between the difference Def2 and the threshold Th2. For example, in the second feedback dimming, the dimming rate of one or more lighting devices 5 installed in the vicinity of the predetermined reflection area is changed to increase or decrease the brightness of the predetermined reflection area in the target space SP5.

[0072] That is, the reflecting step includes a reflection area reflecting step, in which an area in the reference image Im6 where light from at least some of the two or more lighting fixtures 6 is reflected, or an area in the captured image Im5 where light from at least some of the multiple lighting fixtures 5 is reflected, is compared between the captured image Im5 and the reference image Im6. Furthermore, in the reflection area reflecting step, the multiple lighting fixtures 5 that illuminate the target space SP5 are controlled based on the comparison result.

[0073] The luminance of the reflective area is increased or decreased by the reflective area reflection step. For example, a dashed line P2 representing a reflective area is illustrated in one place in Fig. 4. The multiple lighting devices 5 are controlled to change the dimming rate so as to increase or decrease the luminance of this reflective area.

[0074] After performing the second feedback light adjustment, the worker captures an image of the target space SP5 using the imaging device 3 (step ST10). As a result, a new captured image Im5 is generated. For the reflection area, steps ST8 to ST10 are repeated until the luminance difference Def2 between the reference image Im6 and the captured image Im5 becomes equal to or less than the threshold value Th2 (until the result of step ST8 becomes "No"). When the difference Def2 becomes equal to or less than the threshold value Th2, the process proceeds to step ST11.

[0075] Prior to step ST11, the reflection unit 23 obtains a dark region. The dark region is a region in the captured image Im5 whose luminance is less than a predetermined dark threshold. More specifically, the reflection unit 23 determines, as a dark region, a set of sections (sections d1, d2, d3, d4, ...) whose average luminance is less than a predetermined dark threshold. In FIG. 4, the dark regions are indicated by dashed lines P3. Also, in FIG. 3, a region in the reference image Im6 corresponding to the dark regions in the captured image Im5 is indicated by dashed lines Q3. The dark region may be obtained based on the luminance of each section in the reference image Im6.

[0076] In step ST11, the reflecting unit 23 compares a dark area in the captured image Im5 with an area in the reference image Im6 that corresponds to the dark area in the captured image Im5. The reflecting unit 23 controls the plurality of lighting devices 5 that illuminate the target space SP5 based on the comparison result. More specifically, if a difference Def3 in luminance between a predetermined dark area in the captured image Im5 and an area in the reference image Im6 that corresponds to the predetermined dark area in the captured image Im5 is greater than a threshold Th3 (step ST11: Yes), the reflecting unit 23 performs third feedback dimming (step ST13) according to a condition (see step ST12). The third feedback dimming is a process of dimming the plurality of lighting devices 5 so as to reduce the difference between the difference Def3 and the threshold Th3. For example, in the third feedback dimming, the dimming rate of one or more lighting devices 5 installed within a predetermined distance from the predetermined dark area is changed to increase or decrease the luminance of the predetermined dark area in the target space SP5.

[0077] That is, the reflecting step includes a dark area reflecting step, in which the captured image Im5 is compared with the reference image Im6 for areas in which the luminance of the reference image Im6 or the captured image Im5 is less than a predetermined dark threshold value. Furthermore, in the dark area reflecting step, the lighting devices 5 that illuminate the target space SP5 are controlled based on the comparison result.

[0078] The luminance of the dark area is increased or decreased by the dark area reflection step. For example, in Fig. 4, dashed lines P3 representing the dark areas are illustrated in two places. The multiple lighting devices 5 are controlled to change the dimming rate so as to increase or decrease the luminance of the dark areas.

[0079] After performing the third feedback light adjustment, the worker captures an image of the target space SP5 using the imaging device 3 (step ST14). As a result, a new captured image Im5 is generated. Steps ST11 to ST14 are repeated for the dark region until the luminance difference Def3 between the reference image Im6 and the captured image Im5 becomes equal to or smaller than the threshold value Th3 or the above condition is no longer satisfied (until the result of step ST11 or ST12 becomes "No").

[0080] If the result of step ST11 or ST12 is "No," third feedback dimming is not performed, and the process of dimming the multiple lighting devices 5 ends. In step ST12, it is determined whether a condition is met. The condition is that the effect on the differences Def1 and Def2 caused by the process of increasing or decreasing the luminance of dark areas in the target space SP5 (captured image Im5) by the third feedback dimming so as to reduce the difference between the difference Def3 and the threshold value Th3 is smaller than the index. If the condition is met, third feedback dimming is performed.

[0081] More specifically, the reflection unit 23 refers to the degree of influence on the luminance of the bright area and the luminance of the reflective area with respect to the change in the dimming rate of each lighting device 5. The greater the degree of influence, the greater the change in the luminance of the bright area or the luminance of the reflective area with respect to a certain change in the dimming rate. The degree of influence may be found, for example, from the data of the first and second feedback dimming in steps ST7 and ST9, or may be found from the distance between the lighting device 5 and the bright area or the reflective area. By referring to the degree of influence, the reflection unit 23 determines whether the influence on the differences Def1 and Def2 caused by the process of increasing or decreasing the luminance of the dark area in the target space SP5 (captured image Im5) is smaller than the index.

[0082] As described above, in the reflection step (steps ST4 to ST14), the multiple lighting devices 5 are controlled based on the comparison result between the captured image Im5 and the reference image Im6. Here, in the reflection step, the luminance of each RGB component may be compared, or the luminance of the sum of all RGB components may be compared. Furthermore, the luminance of each RGB component may be compared only in some of the multiple steps of the reflection step (the bright area reflection step, the reflective area reflection step, and the dark area reflection step). In one feedback dimming, the luminance of only one of the three RGB components may be changed, or the luminance of two or three components may be changed.

[0083] That is, in the illumination control method of the present embodiment, the reflection step may be repeated until the difference in color temperature between the reference image Im6 and the captured image Im5 falls below a predetermined index. The color temperature may be compared for each section having a certain size, and the section is a bright area in the bright area reflection step, a reflective area in the reflective area reflection step, and a dark area in the dark area reflection step.

[0084] As can be seen from the above, in the illumination control method of this embodiment, the reflection step is repeated until the difference in luminance between the reference image Im6 and the captured image Im5 falls below a predetermined index. The predetermined index is an index consisting of the magnitude relationship between the differences Def1, Def2, Def3 and the thresholds Th1, Th2, Th3. In this embodiment, the reflection step is repeated until at least Def1≦Th1 and Def2≦Th2 are satisfied.

[0085] In addition, in the lighting control method of this embodiment, in the reflection step, the brightness of each pixel of the reference image Im6 and the captured image Im5 is compared, and based on the comparison result, multiple lighting devices 5 that illuminate the target space SP5 are controlled (see [Mathematical Expression 1]).

[0086] [Equation 1] is an example of a formula for calculating the differences Def1, Def2, and Def3. Δε is the difference Def1, Def2, or Def3. Ri, Gi, and Bi are the RGB values ​​of each pixel of the reference image Im6. Ri', Gi', and Bi' are the RGB values ​​of each pixel of the captured image Im5. In the bright area reflection step, i = 1 to N are values ​​that specify all pixels in the bright area. In the reflective area reflection step, i = 1 to N are values ​​that specify all pixels in the reflective area. In the dark reflection step, i = 1 to N are values ​​that specify all pixels in the dark area.

[0087]

number

[0088] (8) Registering lighting scenes When the reflection step is completed, the registration step is executed. That is, the lighting control method of the present embodiment has the registration step. In the registration step, setting information of the multiple lighting fixtures 5 when the difference between the reference image Im6 and the captured image Im5 falls below a predetermined index is registered. The setting information is, for example, the dimming rate of each of the multiple lighting fixtures 5. The setting information may be, for example, the input voltage or input current of each of the multiple lighting fixtures 5. The setting information may be a parameter related to power supply control that specifies the input voltage or input current, or the like. The setting information is stored, for example, in storage unit 12 of lighting control system 1.

[0089] The setting information registered in the registration step can be reflected in the multiple lighting fixtures 5 in the target space SP5 at any time. For example, an operator performs an operation on the mobile terminal 3A or the lighting control system 1 to reflect the setting information in the multiple lighting fixtures 5. The controller 4 then obtains the setting information from the lighting control system 1 and controls the multiple lighting fixtures 5 based on the setting information. This reproduces the dimming states of the multiple lighting fixtures 5 that were finally set in the reflection step. That is, the lighting scene in the reference image Im6 is reproduced by the multiple lighting fixtures 5 in the target space SP5.

[0090] As described above, according to the lighting control method of the present embodiment, the adjustment of the lighting scene is less affected by the senses and skills of the worker compared to the case where the worker adjusts the lighting scene in the target space SP5 while visually checking it. Therefore, the adjustment accuracy of the lighting scene can be improved.

[0091] (Variation 1) Hereinafter, a description will be given of a lighting control method according to Modification 1. Configurations similar to those in the embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0092] The lighting control method of the present modified example 1 further includes a fixture comparison step, in which an arrangement of two or more lighting fixtures 6 in the reference image Im6 is compared with an arrangement of the plurality of lighting fixtures 5 in the captured image Im5.

[0093] For example, the lighting control system 1 determines the arrangement of multiple lighting fixtures 5 in the captured image Im5 in the same manner as steps ST1 to ST3 in the embodiment. Then, the lighting control system 1 compares an area in the captured image Im5 where multiple lighting fixtures 5 are installed (for example, an area indicated by a dashed line P1) with a corresponding area in the reference image Im6 (for example, an area indicated by a dashed line Q1) to determine a match rate. For example, the two are compared using pattern matching using machine learning to determine the match rate.

[0094] Furthermore, if the matching rate is smaller than the threshold, the lighting control system 1 outputs an error. For example, the imaging device 3 notifies the operator of the error via the output IF 36. This allows the operator to recognize that the captured image Im5 and the reference image Im6 cannot be said to match or be similar to each other, and to retake the captured image Im5.

[0095] (Variation 2) Hereinafter, a description will be given of a lighting control method according to Modification 2. Configurations similar to those in the embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0096] In the present modified example 2, the reflecting step includes a fixture area reflecting step, in which an area in the reference image Im6 where two or more lighting fixtures 6 are installed or an area in the captured image Im5 where multiple lighting fixtures 5 are installed is targeted for comparison between the captured image Im5 and the reference image Im6. Furthermore, in the fixture area reflecting step, the multiple lighting fixtures 5 that illuminate the target space SP5 are controlled based on the comparison result.

[0097] For example, the arrangement of multiple lighting fixtures 5 in the captured image Im5 is determined in the same manner as steps ST1 to ST3 in the embodiment. Alternatively, an area in the captured image Im5 or the reference image Im6 where the luminance is greater than a predetermined brightness threshold is determined to be an area where the lighting fixture 5 or 6 is installed.

[0098] The subsequent processes may be similar to the bright area reflecting steps (steps ST5 to ST7), for example. That is, the bright area may be replaced with the fixture area (the area where the lighting fixture 5 is installed) and the bright area reflecting step described in the embodiment may be executed.

[0099] The instrument region reflecting step may be executed instead of the bright region reflecting step, or both the bright region reflecting step and the instrument region reflecting step may be executed.

[0100] (Variation 3) The following describes a lighting control method according to Modification 3. Configurations similar to those in the embodiment are given the same reference numerals and descriptions thereof will be omitted.

[0101] The lighting control method does not have to include a process of acquiring a reference image Im6 and a process of comparing a captured image Im5 with the reference image Im6. These processes may be performed by an entity other than an entity executing the lighting control method. The lighting control method only needs to include at least a process of controlling a plurality of lighting devices 5 that illuminate the target space SP5 based on a result of comparing the captured image Im5 with the reference image Im6.

[0102] That is, in the lighting control method according to the present modified example 3, the reflection step is repeated until the difference between the reference image Im6 and the captured image Im5 falls below a predetermined index. In the reflection step, the lighting devices 5 that illuminate the target space SP5 are controlled based on the comparison result between the reference image Im6 and the captured image Im5. The reference image Im6 is an image of a predetermined lighting scene in the reference space SP6 that serves as a reference for adjusting the lighting scene. The captured image Im5 is an image of a current lighting scene in the target space SP5 that is the target for adjusting the lighting scene.

[0103] Moreover, the above lighting control method can be realized by the lighting control system 1. That is, the lighting control system 1 includes a reflection unit 23. The reflection unit 23 repeats the above reflection step until the difference between the reference image Im6 and the captured image Im5 falls below a predetermined index.

[0104] (Other Modifications of the Embodiments) Other variations of the embodiment are listed below. The following variations may be implemented in appropriate combination. The following variations may also be implemented in appropriate combination with the above-mentioned variations.

[0105] The reflecting unit 23 may determine, as bright regions, each of the sections whose average brightness is greater than a predetermined brightness threshold and is within the top N ranks (N is a natural number) among the multiple sections.

[0106] An area of ​​the reference image Im6 having a matching rate with the captured image Im5 smaller than a lower limit may be trimmed away, and the reflecting step may be executed based on the trimmed reference image Im6.

[0107] An area of ​​the captured image Im5 having a matching rate with the reference image Im6 smaller than a lower limit may be trimmed away, and the reflecting step may be executed based on the trimmed captured image Im5.

[0108] When the location information and the identification information are associated in advance, steps ST1 to ST3 can be omitted.

[0109] It is not essential that the operation of the imaging device 3 to capture an image of the target space SP5 is performed by an operator, and the imaging device 3 may capture the image automatically.

[0110] Prior to the comparison between the reference image Im6 and the captured image Im5, image processing may be performed on at least one of the reference image Im6 and the captured image Im5. The image processing may include, for example, distortion correction, size correction, brightness correction, and trimming. In particular, correction may be performed to increase the matching rate between the reference image Im6 and the captured image Im5.

[0111] In the reflection step, the luminance of each of the sections d1, d2, d3, d4, . . . may be compared, instead of comparing the luminance of each pixel of the reference image Im6 and the captured image Im5.

[0112] In the reflection step, the luminance of the reference image Im6 and the captured image Im5 may be compared, the color temperature may be compared, or both the luminance and the color temperature may be compared. When comparing the color temperatures, the color temperatures of the fixture area (see Modification 2) may be compared, for example.

[0113] The lighting control system 1 in the present disclosure includes a computer system. The computer system is mainly composed of a processor and a memory as hardware. At least a part of the functions of the lighting control system 1 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed among multiple chips. The chips may be integrated in one device or distributed among multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Thus, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0114] Furthermore, it is not essential for lighting control system 1 that multiple functions in lighting control system 1 are consolidated into one device, and the components of lighting control system 1 may be distributed across multiple devices. Furthermore, at least some of the functions of lighting control system 1, for example some of the functions of reflection unit 23, may be realized by cloud (cloud computing) or the like.

[0115] Conversely, in the embodiment, at least some of the functions of the integrated system 100 that are distributed among a plurality of devices may be integrated into one device. For example, some of the functions of the integrated system 100 that are distributed among the lighting control system 1 and the controller 4 may be integrated into one device. Also, some of the functions of the integrated system 100 that are distributed among the lighting control system 1 and the imaging device 3 may be integrated into one device.

[0116] (summary) The above-described embodiments and the like disclose the following aspects.

[0117] The lighting control method according to the first aspect includes an acquisition step and a reflection step. In the acquisition step, a reference image (Im6) is acquired, which is an image of a predetermined lighting scene in a reference space (SP6) that is a reference for adjusting the lighting scene. In the reflection step, a captured image (Im5) is acquired, which is an image of a current lighting scene in a target space (SP5) that is a target for adjusting the lighting scene, and the reference image (Im6). Based on the comparison result, a plurality of lighting devices (5) that illuminate the target space (SP5) are controlled. In the lighting control method, the reflection step is repeated until the difference between the reference image (Im6) and the captured image (Im5) falls below a predetermined index.

[0118] According to the above configuration, it is possible to control the lighting devices (5) so that the lighting scene in the target space (SP5) approaches a predetermined lighting scene in the reference space (SP6). Furthermore, the adjustment of the lighting scene is less dependent on the senses and skills of the worker, as compared with a case where an operator performs similar control while visually checking the lighting scene in the target space (SP5). Thus, according to the above configuration, it is possible to improve the accuracy of the adjustment of the lighting scene.

[0119] In addition, in the lighting control method according to the second aspect, in the first aspect, the reflection step includes a bright area reflection step of comparing the captured image (Im5) with the reference image (Im6) for an area in the reference image (Im6) or the captured image (Im5) where the luminance is greater than a predetermined bright threshold, and controlling a plurality of lighting devices (5) that illuminate the target space (SP5) based on the comparison result.

[0120] According to the above configuration, in an area with relatively high luminance, the lighting devices (5) can be controlled to make the lighting scene in the target space (SP5) closer to a predetermined lighting scene in the reference space (SP6). In other words, the lighting scene can be mainly adjusted.

[0121] Furthermore, in the lighting control method according to the third aspect, in the first or second aspect, the reflection step includes a reflection area reflection step of comparing the captured image (Im5) with the reference image (Im6) with respect to an area in the reference image (Im6) where light from at least some of the two or more lighting fixtures (6) is reflected, or an area in the captured image (Im5) where light from at least some of the lighting fixtures (5) is reflected, and controlling the multiple lighting fixtures (5) that illuminate the target space (SP5) based on the comparison result.

[0122] According to the above configuration, the lighting devices (5) can be controlled so that the lighting scene in the target space (SP5) approaches a predetermined lighting scene in the reference space (SP6) in the area where the light from the lighting devices (5) is reflected. In other words, the lighting scene can be fine-tuned.

[0123] In addition, in a lighting control method according to a fourth aspect, in any one of the first to third aspects, the reflection step includes a dark area reflection step of comparing the captured image (Im5) with the reference image (Im6) for an area in the reference image (Im6) or the captured image (Im5) where the brightness is less than a predetermined dark threshold, and controlling a plurality of lighting devices (5) that illuminate the target space (SP5) based on the comparison result.

[0124] According to the above configuration, in an area with a relatively low luminance, the lighting devices (5) can be controlled so that the lighting scene in the target space (SP5) approaches a predetermined lighting scene in the reference space (SP6). In other words, the lighting scene can be finely adjusted.

[0125] In addition, a lighting control method according to a fifth aspect is any one of the first to fourth aspects, further comprising a registration step. In the registration step, setting information of the plurality of lighting devices (5) when a difference between the reference image (Im6) and the captured image (Im5) falls below a predetermined index is registered.

[0126] According to the above configuration, the lighting scene of the target space (SP5) can be easily reproduced based on the setting information.

[0127] In addition, in the illumination control method according to a sixth aspect, in any one of the first to fifth aspects, the reflecting step is repeated until the difference in luminance between the reference image (Im6) and the captured image (Im5) falls below a predetermined index.

[0128] According to the above configuration, the plurality of lighting devices (5) can be controlled so as to bring the luminance of the lighting scene in the target space (SP5) closer to the luminance of a predetermined lighting scene in the reference space (SP6).

[0129] In addition, in the lighting control method according to the seventh aspect, in the sixth aspect, in the reflection step, the luminance of each pixel of the reference image (Im6) and the captured image (Im5) is compared, and based on the comparison result, a plurality of lighting devices (5) that illuminate the target space (SP5) are controlled.

[0130] According to the above configuration, the lighting scene of the target space (SP5) can be adjusted to reflect the luminance of each pixel.

[0131] In addition, in the illumination control method according to an eighth aspect, in any one of the first to seventh aspects, the reflecting step is repeated until the difference in color temperature between the reference image (Im6) and the captured image (Im5) falls below a predetermined index.

[0132] According to the above configuration, the plurality of lighting devices (5) can be controlled so as to bring the color temperature of the lighting scene in the target space (SP5) closer to the color temperature of a predetermined lighting scene in the reference space (SP6).

[0133] In addition, in a lighting control method according to a ninth aspect, in any one of the first to eighth aspects, the reflecting step includes a fixture area reflecting step, in which the captured image (Im5) is compared with the reference image (Im6) for an area in which two or more lighting fixtures (6) are installed in the reference image (Im6) or an area in which multiple lighting fixtures (5) are installed in the captured image (Im5), and the multiple lighting fixtures (5) that illuminate the target space (SP5) are controlled based on the comparison result.

[0134] According to the above configuration, in an area where a plurality of lighting devices (5) are installed, the lighting device (5) can be controlled so as to bring the lighting scene of the target space (SP5) closer to a predetermined lighting scene of the reference space (SP6). In other words, the main adjustment of the lighting scene can be performed.

[0135] A lighting control method according to a tenth aspect is any one of the first to ninth aspects, further comprising a linking step, in which images captured by changing the lighting state of each of the lighting devices (5) in the target space (SP5) one by one are compared with a reference image (Im6), and position information and identification information of the lighting devices (5) illuminating the target space (SP5) are linked based on a comparison result.

[0136] According to the above configuration, after the linking step is executed, it is possible to control a lighting fixture (5) at an arbitrary position among the plurality of lighting fixtures (5).

[0137] In addition, a lighting control method according to an eleventh aspect is any one of the first to tenth aspects, further comprising a fixture comparison step. In the fixture comparison step, an arrangement of two or more lighting fixtures (6) in the reference image (Im6) is compared with an arrangement of the plurality of lighting fixtures (5) in the captured image (Im5).

[0138] According to the above configuration, it is possible to obtain the degree of agreement between the arrangement of two or more lighting devices (6) in the reference image (Im6) and the arrangement of a plurality of lighting devices (5) in the captured image (Im5).

[0139] In addition, in a lighting control method according to a twelfth aspect, the reflecting step is repeated until the difference between the reference image (Im6) and the captured image (Im5) falls below a predetermined index. In the reflecting step, a plurality of lighting devices (5) that illuminate a target space (SP5) are controlled based on a comparison result between the reference image (Im6) and the captured image (Im5). The reference image (Im6) is an image captured of a predetermined lighting scene in the reference space (SP6) that serves as a reference for adjusting the lighting scene. The captured image (Im5) is an image captured of a current lighting scene in the target space (SP5) that is the target for adjusting the lighting scene.

[0140] According to the above configuration, it is possible to improve the accuracy of adjusting the lighting scene.

[0141] Configurations other than those of the first or twelfth aspect are not essential to the lighting control method and may be omitted as appropriate.

[0142] A program according to a thirteenth aspect is a program for causing one or more processors to execute the lighting control method according to any one of the first to twelfth aspects.

[0143] According to the above configuration, it is possible to improve the accuracy of adjusting the lighting scene.

[0144] A lighting control system (1) according to a fourteenth aspect includes an acquisition unit (22) and a reflection unit (23). The acquisition unit (22) acquires a reference image (Im6) obtained by capturing a predetermined lighting scene in a reference space (SP6) that is a reference for adjusting the lighting scene. The reflection unit (23) repeats the reflection step until a difference between the reference image (Im6) and the captured image (Im5) falls below a predetermined index. In the reflection step, a captured image (Im5) obtained by capturing a current lighting scene in a target space (SP5) that is a target for adjusting the lighting scene is compared with the reference image (Im6), and a plurality of lighting fixtures (5) that illuminate the target space (SP5) are controlled based on the comparison result.

[0145] According to the above configuration, it is possible to improve the accuracy of adjusting the lighting scene.

[0146] Not limited to the above aspects, various configurations (including modified examples) of the lighting control system (1) according to the embodiment can be embodied as a lighting control method, a (computer) program, or a non-transitory recording medium having a program recorded thereon. [Explanation of symbols]

[0147] 1. Lighting control system 5. Lighting equipment 6. Lighting equipment 22 Acquisition Department 23 Reflection section Im5 image capture Im6 Reference Image SP5 Target Space SP6 reference space

Claims

1. An acquisition step of acquiring a reference image obtained by capturing a predetermined lighting scene in a reference space that serves as a reference for adjusting the lighting scene; a reflection step of comparing a captured image of a current lighting scene in a target space, which is a target for adjusting the lighting scene, with the reference image, and controlling a plurality of lighting devices illuminating the target space based on a comparison result; repeating the reflecting step until the difference between the reference image and the captured image falls below a predetermined index; Lighting control methods.

2. The reflection step includes: a bright area reflection step of comparing the captured image with the reference image for an area in the reference image or the captured image where the luminance is greater than a predetermined bright threshold, and controlling the plurality of lighting devices that illuminate the target space based on a comparison result; The lighting control method according to claim 1 .

3. The reflection step includes: a reflection area reflection step of comparing an area in the reference image where light from at least some of the two or more lighting fixtures is reflected, or an area in the captured image where light from at least some of the lighting fixtures is reflected, between the captured image and the reference image, and controlling the plurality of lighting fixtures that illuminate the target space based on a comparison result; The lighting control method according to claim 1 .

4. The reflection step includes: a dark area reflection step of comparing the captured image with the reference image for an area in the reference image or the captured image where the luminance is less than a predetermined dark threshold, and controlling the plurality of lighting devices that illuminate the target space based on a comparison result; The lighting control method according to claim 1 .

5. The method further includes a registration step of registering setting information of the plurality of lighting devices when the difference between the reference image and the captured image falls below the predetermined index. The lighting control method according to claim 1 .

6. repeating the reflecting step until a difference in luminance between the reference image and the captured image falls below the predetermined index. The lighting control method according to claim 1 .

7. In the reflecting step, a luminance of each pixel of the reference image and the captured image is compared, and the plurality of lighting devices illuminating the target space are controlled based on a comparison result. The lighting control method according to claim 6.

8. repeating the reflecting step until the difference in color temperature between the reference image and the captured image falls below the predetermined index. The lighting control method according to claim 1 .

9. The reflection step includes: a fixture area reflection step of comparing the captured image with the reference image for a region in which two or more lighting fixtures are installed in the reference image or a region in which the plurality of lighting fixtures are installed in the captured image, and controlling the plurality of lighting fixtures that illuminate the target space based on a comparison result; The lighting control method according to claim 1 .

10. The method further includes a step of comparing an image captured by changing the lighting state of the plurality of lighting devices in the target space one by one with the reference image, and linking position information and identification information of the plurality of lighting devices illuminating the target space based on a comparison result. The lighting control method according to claim 1 .

11. The method further includes a device comparison step of comparing an arrangement of two or more lighting devices in the reference image with an arrangement of the plurality of lighting devices in the captured image. The lighting control method according to claim 1 .

12. a reflection step of controlling a plurality of lighting devices illuminating a target space based on a comparison result between a reference image captured of a predetermined lighting scene in a reference space serving as a basis for adjusting the lighting scene and a captured image captured of a current lighting scene in a target space to be adjusted for the lighting scene, until a difference between the reference image and the captured image falls below a predetermined index; Lighting control methods.

13. To cause one or more processors to execute the lighting control method according to any one of claims 1 to 12, program.

14. an acquisition unit that acquires a reference image obtained by capturing a predetermined lighting scene in a reference space that is a reference for adjusting the lighting scene; and a reflection unit that compares a captured image of a current lighting scene in a target space, which is a target for adjusting the lighting scene, with the reference image, and repeats a reflection step of controlling a plurality of lighting devices that illuminate the target space based on a comparison result until a difference between the reference image and the captured image falls below a predetermined index. Lighting control system.

Images