JP2014093147A - Illumination system and illumination control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination system that can perform efficient illumination design.SOLUTION: An illumination system for controlling plural illumination devices on the basis of a content input from a user to perform light control on an illumination target area has image display means for displaying an image representing the illumination target area, illuminance input means for making the user input at least one of an illuminance indicating place and illuminance on the image, illuminance distribution determining means for generating at least one target illuminance distribution as a distribution of illuminance to be realized for an area containing the indicated place at the center thereof on the basis of the indicated place and illuminance, illumination parameter generating means for generating parameters for controlling each of the illumination devices from the at least one generated target illuminance distribution, and lighting means for controlling each of the illumination devices.

Description

  The present invention relates to a system that performs illumination with a plurality of illumination devices.

  There is a technology that uses a plurality of lighting devices to produce a space with light. Such a technique is used in fields such as stage lighting, interior lighting in a store, and outdoor lighting. By directing with lighting, it is possible to obtain a customer attracting effect, an advertising effect, a mood effect, and the like.

  As such an input interface for operating a plurality of lighting devices, there is a light control table. The dimming console is a device for specifying and controlling the light intensity, color, direction, and the like of a plurality of lighting devices. Since the dimming console can perform fine control over each light source, it is suitable for stage lighting that requires fine light adjustment. However, there is a drawback that the operation is complicated and difficult to handle unless it is proficient in the operation. In addition, in order to obtain a lighting effect that matches the image, the operator himself has to consider how the light source must be adjusted.

On the other hand, in recent years, a technique for producing a space using a plurality of illuminations has started to spread, and a technique capable of performing illumination design by a simpler method is required.
As a technique for controlling a plurality of lighting devices by a simpler method than the conventional method, there is an illumination design system described in Non-Patent Document 1. The system has an interface for designating a place to be illuminated by painting an image of an object with a brush, and can actually illuminate a place designated by the user on the image.

F. Anrys and P. Dutre, “Image-based lighting design”, In the 4th IASTED International Conference on Visualization Imaging and Image Processing, 2004.

  A system that performs illumination design using a drawing interface, such as the illumination design system described in Non-Patent Document 1, has an advantage that a high illumination effect can be obtained with a simple operation. However, since the system described in Non-Patent Document 1 controls illumination in consideration of only the area designated by the user, it cannot predict what illuminance the non-designated area will have. That is, the system is suitable for lighting up an object, but it is not suitable for lighting design for the entire space.

  When the lighting design is performed on the entire space using the drawing interface, the above-described problem occurs when the lighting device is controlled in consideration of only the designated area. In order to solve this problem, it is necessary not only to assign the designated illuminance to the designated area, but also to assign an appropriate illuminance distribution to the periphery of the designated area. By doing in this way, the illumination design with respect to space can be performed efficiently.

  The present invention has been made in consideration of the above-described problems, and an object thereof is to provide an illumination system capable of performing efficient illumination design.

  In order to solve the above-described problem, the lighting system according to the present invention obtains information about a place where desired illuminance is desired from a user, and generates a target illuminance distribution of the illumination target area based on the input information. I took the approach of controlling the lighting device.

  Specifically, the lighting system according to the present invention is a lighting system that performs dimming on an illumination target region by controlling a plurality of lighting devices based on content input from a user, An image display means for displaying an image representing the target area, an illuminance input means for allowing the user to input one or more places and illuminances for designating illuminance on the image, and the designated places and illuminances Based on the illuminance distribution determining means for generating one or more target illuminance distributions, which are illuminance distributions to be realized, for the region centered on the designated location, and the one or more generated target illuminance distributions A lighting parameter generating unit that generates a parameter for controlling each lighting device, and a lighting unit that controls each lighting device using the generated parameter. To.

The image display means is a device such as a display for presenting to the user a region to be illuminated (illumination target region). The illuminance input means is an input interface operated by a user. The illuminance input means may be a pointing device such as a mouse or a pen tablet, or may be a device such as a touch panel or a touch screen integrated with the image display means.
The user uses the illuminance input means to input a place where the illuminance is designated and the desired illuminance among the illumination target area represented by the image. The location may be specified by any method as long as it is performed on the image. For example, a range where desired illuminance is desired may be enclosed or painted. Alternatively, only the point (point) for which desired illuminance is desired may be designated.

Further, the illuminance distribution determining means is means for determining a target illuminance distribution that is information representing the distribution of the target illuminance for each place where the illuminance is designated by the user. The target illuminance distribution is automatically calculated so as to satisfy the conditions input by the user.
The illumination parameter generation means is a means for generating an illumination parameter for obtaining the determined target illuminance distribution in real space. The illumination parameter is a set of parameters that can be specified for each illumination device, and represents, for example, brightness, the direction of the optical axis, the color of light, and the like. By designating the illumination parameter for each illumination device, the mode of light emitted from each illumination device is uniquely determined. In this system, dimming is performed on the illumination target region by generating a plurality of illumination parameters corresponding to each illumination device.

  According to the form of the invention described above, the user can input intuitively while viewing an image representing a place where illumination is performed. In addition, the system generates an illuminance distribution not only for the location specified by the user but also for the surrounding area, so the surrounding illuminance can be predicted, and an efficient lighting design for the space can be realized. .

  Further, the image display means may display the generated target illuminance distribution so as to be superimposed on an image representing the illumination target area.

  By displaying the generated target illuminance distribution in an overlapping manner, the user can perform an input operation while confirming one by one what lighting effect is actually obtained as a result of the operation. The target illuminance distribution may be presented to the user by a graphic, or may be presented to the user by changing the color tone or brightness of the image.

Further, the image display means generates an image connecting points having the same target illuminance with a curve as an image representing the target illuminance distribution, and displays the image superimposed on the image representing the illumination target area. Also good.

  The generated target illuminance distribution can also be represented by a curve. For example, by displaying an isoline connecting points having the same illuminance, the user can grasp a bright place and a dark place at a glance. The illuminance can be expressed by the type of line and color scheme. For example, a brighter spot may be displayed with a warm color line, and a darker spot may be displayed with a cooler color line. Further, a brighter point may be displayed with a thicker line, and a darker point may be displayed with a thinner line.

  Further, the illuminance distribution determining means adjusts the illuminance assigned to the plurality of locations based on the distance from the plurality of locations when the illuminance is specified for the plurality of locations and a plurality of different illuminances are assigned to the same location. It may be characterized by.

  For example, when another target illuminance distribution is generated in the vicinity in a state where the target illuminance distribution has already been generated, a plurality of different target illuminances may be assigned to the same point. In such a case, it is preferable to adjust the assigned illuminance so as not to cause a contradiction. It is preferable to adjust the illuminance based on the distance from the location designated by the user. For example, the adjustment amount of illuminance may be reduced as it is closer to the designated place, and the adjustment amount may be increased as it is farther away.

  The illumination system according to the present invention further includes camera means for imaging the illumination target area, and the image display means outputs an image captured by the camera means as an image representing the illumination target area. It is good.

  In this way, an actual image may be acquired using a camera and displayed through image display means. In this way, for example, it is possible to grasp the positions of furniture arranged in a room, props arranged on the stage, etc., and an accurate lighting design can be performed.

  The camera means captures an image of the illumination target area when the illumination means finishes controlling the respective illumination devices, and the image display means displays an image captured by the camera means. May be a feature.

  With this configuration, it is possible to perform a preview of actually illuminating and confirming the effect, thereby improving the convenience for the user. Further, if the operation is continuously performed, the effect of illumination can be presented to the user in real time.

  Further, each of the plurality of illumination devices may be capable of changing at least one of illuminance and irradiation direction with respect to the illumination target region.

  Each lighting device preferably has a plurality of parameters that can be changed. For example, in addition to the illuminance representing the brightness, there are a tilt angle for changing the light irradiation direction, and the like. The parameter may also include other elements such as the degree of light diffusion. As the degree of freedom of the illumination device increases, an illumination result closer to the target illuminance distribution can be obtained.

  The illumination parameter generation means stores an actual illuminance distribution, which is an actual illuminance distribution when the illumination device performs illumination, for each illumination parameter, and the target illuminance distribution and the stored actual illuminance distribution. It is also possible to search for and determine an illumination parameter that minimizes the error.

  As the illumination parameter, it is preferable to compare the actual illuminance distribution stored in advance with the target illuminance distribution and adopt the one that minimizes the error. With this configuration, it is possible to determine the optimal illumination parameter for actually obtaining the target illuminance distribution.

  In addition, this invention can be specified as an illumination system containing at least one part of the said means. In addition, the present invention can be specified as a lighting control method including at least a part of the processing performed by the above means, or can be specified as a program for controlling the lighting system. The above processes and means can be freely combined and implemented as long as no technical contradiction occurs.

  ADVANTAGE OF THE INVENTION According to this invention, the illumination system which can perform an efficient illumination design can be provided.

It is a schematic diagram of the illumination system which concerns on embodiment. It is a system block diagram of the control apparatus which comprises an illumination system. It is a functional block diagram of the control apparatus which comprises an illumination system. It is a figure explaining the operation screen which designates illumination intensity by drawing. It is a figure explaining the brush size and blurring size in drawing. It is a figure explaining target illumination intensity distribution. It is a figure explaining the case where several target illumination intensity distributions overlap. It is a figure explaining the adjustment result of target illuminance distribution. It is a flowchart figure of the process which determines an illumination parameter.

(System configuration)
The illumination system according to the embodiment will be described. FIG. 1 is a schematic diagram of a lighting device according to the present embodiment. Reference numeral 100 represents a room in which lighting is controlled by the present system. In this embodiment, a single room is illustrated as an object. However, the object need not be a closed space, and may be a stage or the like as long as lighting can be performed by a lighting device. It may be.
The lighting device array 101 is a set of lighting devices installed on the ceiling of a room. In the present embodiment, twelve lighting devices are connected by a power line and a signal line, and operate according to a command from the outside. Each lighting device can adjust brightness, and has a tilt mechanism, and can tilt the optical axis in the X-axis direction and the Y-axis direction.
The camera 102 is a digital camera installed so as to face down from the ceiling so that the entire room can be seen from above. It is preferable that the angle of view of the camera 102 is a value at least so that the entire floor surface of the room can be viewed.

  The control device 200 is a computer for controlling the lighting system according to the present embodiment. When a user performs input through input means (a touch panel indicated by reference numeral 201 in the present embodiment) that the control device 200 has, the control device 200 controls the lighting device based on the input content. The control command is generated, and the generated control command is transmitted to the lighting device array 101 to perform dimming. In FIG. 1, a single control device 200 controls a single lighting device array. However, the control target may be lighting in a plurality of rooms, or a plurality of control devices. However, the lighting in different rooms may be controlled. Further, the control device and the lighting device may be separated from each other. For example, it may be connected via a network.

  FIG. 2 is a hardware configuration diagram of the control device 200 according to the present embodiment. The control device 200 is a computer including an arithmetic processing unit (CPU) 204, a main storage device 205, and an auxiliary storage device 206 as hardware. The program stored in the auxiliary storage device is loaded into the main storage device and executed by the CPU, whereby the processing described later is executed.

The control device 200 includes a drawing interface 201, a camera interface 202, and a lighting interface 203.
The drawing interface 201 is a human interface device having input means and output means. The input means may be one that designates coordinates on the screen by moving the pointer like a mouse, or one that designates coordinates on the screen directly like a touch panel. The output means is a display that presents an image to the user. In the present embodiment, the drawing interface 201 is a touch panel display in which input means and output means are integrated. However, the drawing interface 201 can present information to the user and accept input from the user. If possible, it may be configured by any device.

The camera interface 202 is an interface for acquiring an image from the camera 102. An indoor overhead view image can be acquired through the camera 102 installed on the ceiling.
The lighting interface 203 is an interface for issuing a control command to the lighting device array 101. The illumination interface 203 has brightness (for example, specified in the range of 0 to 255) and inclination in the X-axis direction (for example, specified in the range of −45 degrees to 45 degrees) for each of the 12 lighting apparatuses in the lighting apparatus array. , A control command including an inclination in the Y-axis direction (same as on the left) can be transmitted. In the present embodiment, information including three types of values of brightness (illuminance), X-axis direction tilt, and Y-axis direction tilt is referred to as an illumination parameter.

(Functional configuration of control device)
FIG. 3 is a diagram illustrating detailed functional blocks of the control device 200. FIG. 4 is a diagram illustrating a GUI (operation screen) provided to the user by the control device 200. Hereinafter, each functional unit of the control device 200 illustrated in FIG. 3 will be described with reference to FIG. 4.

<Image acquisition unit 301>
The image acquisition unit 301 is a functional unit that acquires a captured image (hereinafter, a room image) from the camera 102 through the camera interface 202. The image acquisition unit 301 can acquire an overhead image of a room as shown in the indoor image 401 of FIG. The acquired room image is transmitted to the illuminance input interface unit 302.

<Illuminance input interface unit 302>
The illuminance input interface unit 302 is a functional unit that presents an indoor image to the user and allows the user to input a location where the illuminance is specified and the illuminance. The illuminance input interface unit 302 has a function of displaying an indoor image by using the drawing interface 201 and a function of receiving an input from a user. Hereinafter, a specific illuminance designation method will be described with reference to the GUI examples shown in FIGS.

  FIG. 4 is an image displayed on a display included in the drawing interface 201. The image has a two-pane configuration, in which a room image 401 is displayed in the left pane and a drawing tool 402 is displayed in the right pane.

An indoor image 401 is an indoor image acquired by the image acquisition unit 301. When there are a plurality of target rooms, the display may be switchable for each room. Here, description will be made using an example in which three tables (and three sets of 12 chairs), a sofa (upper left), and a stage (upper right) are arranged in a room. Hereinafter, the area | region currently displayed on the indoor image 401 is demonstrated using the word illumination object area | region.
The drawing tool 402 is an area in which a tool for specifying illuminance for the illumination target area is stored. The user sets drawing conditions using the drawing tool 402 and performs drawing on the indoor image 401 to specify illuminance.

Hereinafter, components of the drawing tool 402 will be described.
The tool palette 402a is a palette for selecting a drawing mode. In this example, five functions of brush, dropper, clear, undo, and redo can be selected. The brush is a tool for painting an illumination target area with a specified size and brightness. The eyedropper is a tool for obtaining the brightness of a specified location. Clear is a tool for erasing input, and Undo and Redo are tools for redoing and repeating, respectively. The user presses one of the icons and selects a drawing mode.

  The illuminance palette 402b is a pallet for designating illuminance. In this example, the brightness that can be specified is five levels. Here, the brightest object is expressed as illuminance 1, and the darkest object is expressed as illuminance 5. The illuminance is not an absolute value, but a relative value with respect to the maximum realizable brightness. The user designates illuminance by selecting one of the icons.

The brush size 402c is a slider for designating the size of the area for designating the illuminance when drawing, and the blur size 402d is designated for the size of the area obtained by adding the blur for drawing to the brush size. It is a slider. The blur size cannot be set smaller than the brush size.
Here, the brush size and the blur size will be described with reference to FIG. Here, the illuminance indicated by the white triangle mark is designated for the point indicated by the black triangle mark. The brush size represents the size of the area where the specified illuminance is set by one specification. The blur size is the area where the illuminance gradually decreases from the specified illuminance toward 0 (hereinafter referred to as the blur area). It represents the size of the entire area. When the brush size is set large, the area where the specified illuminance can be obtained becomes larger with one specification, and when the blur size is set large without changing the brush size, the blur area becomes larger (that is, the illuminance gradient) Is more gradual).
In this example, the brush size and the blur size are variable, but each size may be fixed.

  When the drawing condition is set by the drawing tool 402, the indoor image 401 can be drawn.

Hereinafter, a specific illuminance designation method will be exemplified with reference to FIG.
Here, it is assumed that the user wants to brighten a portion corresponding to the upper right stage in the illumination target area. The user selects a brush from the tool palette and selects the brightest of the five illuminances on the illuminance palette. The brush size is set to such a size that the area 601 can be specified at one time.
Then, set an appropriate blur size, and tap the place indicated by a cross on the screen. Thereby, an illuminance of 1 is designated for the region 601. The designated position, illuminance, brush size, and blur size are transmitted to the target illuminance map generation unit 303, and an illuminance distribution to be realized, that is, a target illuminance distribution is generated. In this example, since the illuminance is specified only at one place, an illuminance distribution having one illuminance peak as shown in FIG. 5 is generated as the target illuminance distribution.

<Target illumination map generation unit 303>
The target illuminance map generation unit 303 is a unit that acquires information related to illuminance designation input by the user and determines the illuminance distribution by calculation. The illuminance distribution obtained by the calculation is referred to as a target illuminance distribution. The target illuminance distribution is generated for the entire illumination target area.

  An illuminance designation performed on the area 601 will be described as an example. Here, since the blur size is larger than the brush size, the illuminance is set so that the outside of the region 601 gradually becomes darker. The dotted line and the solid line shown in FIG. 6 are obtained by connecting points having the same illuminance with an isoline. That is, as the distance from the area where the illuminance is 1, it gradually becomes darker, and the illuminance is 5 in the outermost range.

  An example in which the area is specified by setting the blur size small is indicated by reference numeral 602. Here, consider the case where it is desired to brighten the center of the upper left sofa. When the blur size is set small and the area is specified, the illuminance slope of the blur area becomes steep. That is, since the illuminance changes from 1 to 5 at a short distance, an effect of applying a spotlight to the upper left sofa can be obtained.

  In this way, the target illuminance map generation unit 303 determines the illuminance distribution in the illumination target area from the input information (specified location, specified illuminance, brush size, blur size). The determined target illuminance distribution is preferably fed back to the illuminance input interface unit 302 and presented to the user in real time. For example, as described above, an image in which the same illuminance is connected by an isoline may be generated and displayed on the screen as an overlay.

Here, a method for adjusting the target illuminance distribution when a plurality of illuminances are designated in the illumination target area will be described with reference to FIG. The screen for actually specifying the illuminance is the XY plane, but here, for the sake of simplicity of explanation, a diagram showing the relationship between the distance to the specified position and the illuminance is shown as an example.
FIG. 7A shows an example in which there are two points (701 and 702) where the illuminance is specified, and the distributions of the generated target illuminances overlap each other. Here, since a plurality of different illuminances are assigned to the same point in the section 703 where the illuminance distributions are overlapped, it is desirable to adjust the illuminance at least at a point existing in the section.

  Here, an example of a method for adjusting the illuminance will be described with reference to FIGS. One method of adjusting the illuminance is to use the distance from the point where the illuminance is specified to the target point. For example, consider a case where there is a point P, the target illuminance 701a is generated by designating the point 701, and the target illuminance 702a is generated by designating the point 702. Here, for the point P, when the distance from the point 701 is x and the distance from the point 702 is y, the target illuminance 701a and the target illuminance 702a are changed at a ratio of x: y, and the same illuminance is obtained. And That is, the adjustment is performed so that the illuminance at the point is changed as the target point is farther from the point where the illuminance is specified. In the case of this example, the adjusted target illuminance distribution is as indicated by reference numeral 704.

  Apart from this, there is a method of adjusting the illuminance without considering the distance from the designated point. FIG. 7C shows an example in which the target illuminance distribution is adjusted by adopting the higher illuminance for the overlapped portions without considering the distance from the designated point. The adjusted target illuminance distribution is as indicated by reference numeral 705. In addition to this, with respect to the portion where the distributions overlap, an average value of illuminance may be taken, or a lower illuminance may be adopted.

An example of the adjustment method of the target illuminance distribution has been described here, but any method can be adopted as the adjustment method of the target illuminance distribution when a plurality of illuminance designations are performed. FIG. 8 shows an example of the adjustment result of the target illuminance distribution when the area 601 is designated as “illuminance 1” and the area 603 is newly designated as “illuminance 2”.

  Since the target illuminance generated by the above processing is a relative value with respect to the maximum realizable brightness, it is necessary to convert this into absolute illuminance. Here, the illuminance conversion process will be described.

The target illuminance at a certain point can be expressed by multiplying the maximum illuminance that can actually be illuminated by a coefficient based on the user's designation. Specifically, if the maximum illuminance that can actually be illuminated at pixel j is E ^j _base , the target illuminance E ^j _{target at} pixel j can be expressed as in Equation 1. β is a coefficient based on designation by the user. For example, the illuminance 1 can be defined as 1.0, the illuminance 2 can be defined as 0.8.
In addition, by performing calculation for all the pixels, the target illuminance distribution E _target of the illumination target area can be obtained (Formula 2).

If an absolute value is used for the target illuminance from the beginning, it may be possible to specify an unrealizable illuminance, but by doing so, it is possible to generate an appropriate target illuminance according to the illumination capability. it can. Note that the maximum illuminance E ^j _base for each pixel that can actually be illuminated is obtained for each target room via a camera as an indoor image in a state in which illumination is performed in advance with the maximum illuminance, and the target illuminance map generation unit 303 It is preferable to memorize.

<Lighting parameter generation unit 304>
Next, processing for generating an illumination parameter for controlling an actual lighting device based on the target illuminance distribution E _target generated by the target illuminance map generation unit 303 will be described. In the present embodiment, since twelve lighting devices are used, in this example, twelve lighting parameters for obtaining the target illuminance distribution are determined.

As described above, the illumination parameter includes three values: illuminance (denoted as b), inclination in the X-axis direction (denoted as x), and inclination in the Y-axis direction (denoted as y). That is, if the illumination parameter in the i-th illumination device is set to c _i , c _i can be represented by a set of three kinds of numerical values [b _i, x _i , y _i ].

Further, the illumination parameter generation unit 304 stores an actual illuminance distribution when illumination is performed using specific illumination parameters for each illumination device. For the i-th lighting device, the actual illuminance distribution in the case where illumination is performed independently using a specific lighting parameter c _i can be expressed as E _i [c _i ]. When this illuminance distribution is summed up for all the lighting devices, an expected illuminance distribution of the illumination target area can be generated. That is, the expected illuminance distribution E _expect of the illumination target region can be expressed as Equation 3. For a specific lighting device, the actual illuminance distribution E _i [c _i ] when the lighting is performed using a specific parameter is acquired in advance by calibration and stored in the lighting parameter generation unit 304. It is preferable to keep.
As with E _target , E _expect is a set of values expressed for each pixel.

FIG. 9 is a flowchart illustrating a process of determining 12 illumination parameters from the target illuminance distribution E _target performed by the illumination parameter generation unit 304. Hereinafter, each step will be described. In the present embodiment, a set of illumination parameters of all illumination devices is set as c.

First, in step S11, a value representing a dark room state is substituted for all the illumination parameters constituting c. That is, the illuminance of all lighting devices is 0.
Next, an evaluation value O [c] representing an error between the expected illuminance distribution E _expect when the illumination is performed using c and the target illuminance distribution E _target is calculated. The evaluation value O [c] is expressed as Equation 4. That is, the sum of the squares of errors calculated for each pixel is an evaluation value.
The calculated evaluation value is temporarily stored (S12).

In step S13, a plurality of patterns in the vicinity of c are extracted from all illumination parameter patterns that c can take. The set of extracted patterns can be set as {c ′}. Then, an expected illuminance distribution E _expect is calculated for each component of the acquired pattern set {c ′}, and an evaluation value representing an error from the target illuminance distribution E _target is calculated. The set of calculated evaluation values can be expressed as {O [c ′]} (S14).

Then, it is confirmed whether the smallest evaluation value constituting {O [c ′]} is smaller than the temporarily stored evaluation value O [c] (S15). 'Is replaced with c (S16), and the processing from step S13 is repeated. In other words, the hill-climbing method is used to search for the smallest evaluation value from among all combinations of illumination parameters.
If no further evaluation value is found in step S15, c at that time is determined as the target illumination parameter set, and the process is terminated (S17).
Through the processing described above, the illumination parameter generation unit 304 can determine the illumination parameters to be given to the 12 illumination devices.

<Lighting control command generation unit 305>
The illumination control command generation unit 305 is a functional unit that generates and transmits a command to be transmitted to the illumination device array 101 based on the 12 illumination parameters determined by the illumination parameter generation unit 304. The illuminance and direction of each of the 12 lighting devices are changed by the generated command, and the actual illumination target area is illuminated.
In addition, after the illumination control command generation unit 305 transmits the command, the image acquisition unit 301 can acquire the indoor image, thereby providing a preview image to the user. Further, if the indoor images are continuously acquired and displayed on the screen, a real-time image can be provided to the user.

(Effect of embodiment)
The illumination system according to the present embodiment employs a technique in which an image of an illumination target area is presented to the user, and the user designates illuminance by directly drawing the image. With this configuration, the user can obtain a feeling as if a space is being painted with a light brush, and can perform a more intuitive input operation. In addition, by generating the target illuminance distribution and presenting it to the user in real time, the user can know how the illuminance distribution changes when the input content is reflected, and more accurate Lighting design can be done.

  The target illuminance distribution is expressed by a value based on the maximum illuminance that can be illuminated, and is automatically adjusted. Since the lighting system with conventional drawing was specified by an absolute value, it was possible to specify an infeasible state, such as specifying the darkest area right next to the brightest area. In the lighting system according to the embodiment, this can be prevented.

  In the description of the embodiment, information on the maximum illuminance that can be illuminated is stored in the target illuminance map generation unit 303, and information on illuminance when illumination is performed using a specific parameter is stored in the illumination parameter generation unit 304. It was. These pieces of information are measured in advance through the camera, but the actual illuminance and the luminance of the image acquired by the camera are not necessarily in direct proportion. Therefore, in order to obtain more accurate illuminance, it is preferable to measure the characteristics of the camera in advance and perform appropriate correction.

(Modification)
In addition, said embodiment is an example to the last, and this invention can be suitably changed and implemented within the range which does not deviate from the summary.
For example, in the description of the embodiment, it is assumed that the environment becomes a dark room when the lighting device is turned off. However, when there is incident light from the outside, the calculation in step S12 is performed in consideration of the incident light. Also good. Specifically, the sun may be regarded as one of the lighting devices, and the date and time may be handled as lighting parameters (because the incident angle of sunlight changes depending on the season and time).
In addition, when there is a means for limiting incident light from the outside, such as a blind or a curtain, a parameter (for example, the opening degree of the curtain) expressing them may be provided and treated as an illumination parameter for the incident light.

  The generated target illuminance distribution can be presented to the user at an arbitrary timing. For example, the target illuminance distribution may be generated in real time and presented to the user before the place where the illuminance is specified is determined by clicking or tapping, that is, while the pointer is being moved. In this way, the target illuminance distribution imaged by the user can be easily obtained.

  Further, in the description of the embodiment, the maximum illuminance that can be illuminated is the brightness in a state in which all the lighting devices are turned vertically downward and are lit at the maximum brightness. For example, higher illuminance can be obtained by directing the optical axes of a plurality of lighting devices to one point. However, it should be noted that, if this is done, the number of illumination devices that can be used substantially decreases, which may increase the error between the target illuminance distribution and the actual illuminance distribution.

  In the description of the embodiment, the camera and the lighting device are both installed on the ceiling. However, the camera is not necessarily installed on the ceiling. For example, when the object to be illuminated is a stage, a camera may be installed at a position corresponding to the passenger seat. Similarly, the lighting device is not necessarily installed on the ceiling. Even if the camera and the lighting device are arranged at arbitrary positions, the same effects as those of the illustrated embodiment can be obtained. However, depending on the arrangement of furniture, props, etc., there is a possibility that an area that is shaded with respect to the camera or the lighting device may be generated. Therefore, it is most preferable that the camera and the lighting device are in a position overlooking the illumination target area.

  In the description of the embodiment, the illumination parameter is brightness and direction. However, when an illumination device that can change the color is used, the color may be handled as a part of the illumination parameter.

DESCRIPTION OF SYMBOLS 100 Illumination object 101 Illumination device array 102 Camera 200 Control device 201 Drawing interface 202 Camera interface 203 Illumination interface 204 Arithmetic processing device 205 Main storage device 206 Auxiliary storage device

Claims (10)

A lighting system that performs dimming on a lighting target region by controlling a plurality of lighting devices based on content input from a user,
Image display means for displaying an image representing the illumination target area;
Illuminance input means for allowing the user to input one or more places and illuminances for specifying illuminance on the image;
Illuminance distribution determining means for generating one or more target illuminance distributions, which are illuminance distributions to be realized, for an area centered on the designated location, based on the designated location and illuminance,
Illumination parameter generation means for generating a parameter for controlling each lighting device from the generated one or more target illuminance distributions;
Lighting means for controlling each lighting device using the generated parameters;
A lighting system comprising: The illumination system according to claim 1, wherein the image display unit displays the generated target illuminance distribution so as to be superimposed on an image representing the illumination target area. The image display means generates an image connecting points having the same target illuminance with a curve as an image representing the target illuminance distribution, and displays the image superimposed on the image representing the illumination target area. The lighting system according to claim 2. The illuminance distribution determining means adjusts the illuminance assigned to a plurality of locations based on the distance from the plurality of locations when the illuminance is specified for the plurality of locations and a plurality of different illuminances are assigned to the same location. The illumination system according to any one of claims 1 to 3, characterized by: Camera means for imaging the illumination target area;
The illumination system according to claim 1, wherein the image display unit displays an image captured by the camera unit as an image representing an illumination target area. The camera means captures an image of the illumination target area at the time when the illumination means has finished controlling the respective illumination devices,
The illumination system according to claim 5, wherein the image display unit displays an image captured by the camera unit. The illumination system according to any one of claims 1 to 6, wherein each of the plurality of illumination devices is capable of changing at least one of illuminance and an irradiation direction with respect to the illumination target region. The illumination parameter generation means stores an actual illuminance distribution, which is an actual illuminance distribution when the illumination device performs illumination, for each illumination parameter, and the target illuminance distribution and the stored actual illuminance distribution The illumination system according to any one of claims 1 to 7, wherein an illumination parameter that minimizes an error is searched for and determined. On the basis of the content input from the user, by controlling a plurality of lighting devices, a lighting control method for dimming the illumination target area,
Computer
Presenting an image representing the illumination target area to the user;
Allowing the user to designate one or more locations and illuminances for specifying illuminance on the image;
Generating one or more target illuminance distributions, which are illuminance distributions to be realized, for an area centered on the designated location, based on the designated location and illuminance;
Generating a parameter for controlling each lighting device from the generated one or more target illuminance distributions, and controlling each lighting device using the generated parameter;
The lighting control method characterized by including. A program for controlling a lighting system that performs dimming on a lighting target area by controlling a plurality of lighting devices based on contents input from a user,
On the computer,
Presenting an image representing the illumination target area to the user;
Allowing the user to designate one or more locations and illuminances for specifying illuminance on the image;
Generating one or more target illuminance distributions, which are illuminance distributions to be realized, for an area centered on the designated location, based on the designated location and illuminance;
Generating a parameter for controlling each lighting device from the generated one or more target illuminance distributions, and controlling each lighting device using the generated parameter;
The lighting system control program characterized by performing this.

Images