Flower field lighting system, control device and lighting method

Abstract

To light up a flower field beautifully.SOLUTION: A lighting system 100 includes a photographing device 10 arranged in a position where it can photograph a flower field, a projection device 20 arranged in a position where it can project light onto the flower field, and a control device 40 connected to the photographing device 10 and the projection device 20. The control device 40 analyzes the image of the flower field photographed by the photographing device 10 to identify the flower parts in the photographed image, and controls the projection device 20 to project light onto the flowers in the flower field based on the analysis results.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a system and a control device for lighting a flower garden. The present invention also relates to a method for lighting a flower garden. [Background technology]

[0002] Currently, projection mapping, which projects image light from a projector onto a target object to create various image effects, is becoming widespread. Various techniques for generating projected images for projection mapping have been proposed.

[0003] For example, Patent Document 1 discloses an image projection system including a projection device, an imaging device, and a computing device. In the system of Patent Document 1, conversion information for converting the camera coordinates of the imaging device and the projector coordinates of the image projection device is generated based on the positional relationship between a predetermined pattern image projected by the image projection device and the same pattern image captured by the imaging device. In this system, when the imaging device captures an image of a subject including a person, the system detects the position of the person related to the camera coordinates, and converts the position information of the person related to the camera coordinates into position information related to the projector coordinates based on the conversion information generated in advance, thereby projecting image light from the projector onto the person in a superimposed manner. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-97148 A Summary of the Invention [Problem to be solved by the invention]

[0005] It has been known for some time that projection mapping technology can be used to project image light onto people, as in Patent Document 1, or onto other structures such as buildings. The inventor of the present invention therefore considered applying projection mapping technology to illuminate a flower field. However, there has been little progress in projecting light onto a flower field that includes flowers. In particular, a flower field contains many flowers, leaves, stems, and other soil parts, and has a complex three-dimensional shape, so it is necessary to consider how to project light to make the flower field look beautiful.

[0006] Therefore, a main object of the present invention is to provide a technique that can illuminate a flower garden beautifully. [Means for solving the problem]

[0007] A first aspect of the present invention relates to a lighting system for a flower field. The lighting system according to the present invention includes a photographing device arranged at a position where the flower field can be photographed, a projection device arranged at a position where light can be projected onto the flower field, and a control device connected to the photographing device and the projection device. The control device also includes an image analysis means and a projection control means. The image analysis means analyzes an image of the flower field photographed by the photographing device and identifies a flower part in the photographed image. The projection control means controls the projection device to project light onto the flowers in the flower field based on the analysis result by the image analysis means. Note that the "flower" means a corolla, which is a collection of multiple petals, of a single plant planted in the soil in the flower field. In this way, the flower of the plant in the flower field can be identified by image analysis and light can be projected onto the flower, thereby beautifully lighting the flower field. Note that in the present invention, light may be projected onto only the flowers in the flower field, or light may be projected onto the flowers and grass in the flower field as described later. However, it is preferable not to project light onto the soil in the flower field.

[0008] In the lighting system according to the present invention, the image analysis means may analyze an image of the flower field captured by the image capture device and identify the flower portion and the grass portion in the captured image. In this case, the projection control means may control the projection device to project light onto the flowers and grass in the flower field based on the analysis result by the image analysis means. Note that the "grass" refers to the part of a plant planted in the soil in the flower field, excluding the above-mentioned flower, and includes shoot systems such as leaves, stems, and trunks. However, the "grass" referred to here does not include the root system buried in the soil. In this way, by projecting light not only onto the flowers but also onto the grass around them, the flower field can be made to look more beautiful than when only the flowers are illuminated, depending on the type of plant in the flower field. For example, only the flowers can be illuminated for plants with relatively large corollas such as sunflowers and cosmos, and both the flowers and grass can be illuminated for plants with relatively small corollas such as nemophila.

[0009] In the lighting system according to the present invention, the projection control means may control the projection device so that the lighting conditions for the flowers in the flower field are different from the lighting conditions for the grass. The lighting conditions here include the amount of light, illuminance, and color. For example, it is preferable to make the amount of light projected onto the grass smaller than the amount of light projected onto the flowers. This makes it possible to make the light stand out while illuminating the grass around the flowers. Conversely, if it is desired to make the grass stand out, it is preferable to make the amount of light projected onto the grass larger than the amount of light projected onto the flowers.

[0010] In the lighting system according to the present invention, it is preferable that the image control means generates a flower mask image in which the flower part in the photographed image of the flower field is a projection area and the rest is a non-projection area. In this case, the projection control means controls the projection device to project light onto the flowers in the flower field based on the flower mask image. In this way, by generating the flower mask image and controlling the projection device, the flowers in the flower field can be illuminated with high precision. In particular, since the flower mask image can be converted from the camera coordinate system to the projector coordinate system, the processing efficiency of generating the projection image can be improved by generating the flower mask image.

[0011] In the lighting system according to the present invention, the image control means may generate a flower mask image in which the flower portion in the photographed image of the flower field is a projection area and the rest is a non-projection area, and a grass mask image in which the grass portion in the photographed image of the flower field is a projection area and the rest is a non-projection area. In this case, the projection control means controls the projection device to project light onto the flowers in the flower field based on the flower mask image, and to project light onto the grass in the flower field based on the grass mask image. In this way, by generating the flower mask image and the grass mask image, the lighting conditions for the flowers and the grass can be controlled separately.

[0012] In the system according to the present invention, it is preferable that the flower mask image expresses its projection area with one of the RGB values, and the grass mask image expresses its projection area with another one of the RGB values. For example, when the projection area of ​​the flower mask image is expressed with an R value, the projection area of ​​the grass mask image may be expressed with a G value or a B value. In this case, the flower mask image and the grass mask image can be synthesized into one image expressed with an RGB value. This reduces the amount of data of the mask image, and improves the processing efficiency of generating the projection image.

[0013] The second aspect of the present invention is a control device constituting the system according to the first aspect described above. That is, the control device according to the present invention is connected to a photographing device arranged at a position where a flower field can be photographed, and a projection device arranged at a position where light can be projected onto the flower field, and is composed of one or more computers. The control device according to the present invention includes an image analysis means for analyzing an image of the flower field photographed by the photographing device and identifying a flower part in the photographed image, and a projection control means for controlling the projection device to project light onto the flowers in the flower field based on the analysis result by the image analysis means. Note that a computer program for causing one or more computers to function as the control device according to the second aspect may be regarded as one aspect of the present invention. This computer program may be pre-installed on the computer, may be downloadable via the Internet, or may be recorded on a non-transitory recording medium such as a CD-ROM.

[0014] A third aspect of the present invention relates to a method for illuminating a flower field. In the illumination method according to the present invention, an image capturing device captures an image of the flower field (image capturing step). A control device analyzes the image of the flower field to identify flower parts in the image, and generates a control signal for a projection device to project light onto flowers in the flower field based on the analysis result of the image (control step). The projection device projects onto the flowers in the flower field based on the control signal (projection step). Effect of the Invention

[0015] According to the present invention, a flower garden can be beautifully illuminated. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram showing an example of the overall configuration of a system according to the present invention. [Diagram 2] FIG. 2 is a block diagram illustrating example functional components of the system of the present invention. [Diagram 3] FIG. 3 shows a schematic example of a captured image before the projection of the imaging light. [Figure 4] FIG. 4 shows an example of a mask image. [Diagram 5] FIG. 5 is a schematic diagram showing an example of a captured image after projection of the imaging light. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes appropriate modifications of the embodiments described below within the scope obvious to those skilled in the art.

[0018] FIG. 1 shows an overall configuration of a lighting system 100 according to an embodiment of the present invention. As shown in FIG. 1, the lighting system 100 according to the present invention is used to light a flower field in which a plurality of plants are planted. In this flower field, a plurality of plants are planted in soil. The plants in this flower field include plants having flowers (corollas). In addition to the flowers, the plants have grass (leaves, stems, and / or trunks). The types of plants having flowers are not limited, but examples include sunflowers, cosmos, and nemophila. In addition, the number of plants planted in the flower field does not need to be only one type, and multiple types of plants may be planted in the flower field. In addition to the plants having flowers, plants without flowers may also be planted in the flower field.

[0019] As shown in FIG. 1, the lighting system 100 includes a photographing device 10, a projection device 20, a detection device 30, and a control device 40. The photographing device 10, the projection device 20, and the detection device 30 are each connected to the control device 40 by wire or wirelessly. The control device 40 may be a cloud-type computer, in which case, the photographing device 10, the projection device 20, and the detection device 30 may be connected to the control device 40 via the Internet. In the example shown in FIG. 1, one photographing device 10 and one projection device 20 are illustrated, but each of these devices may be provided in multiple units. In addition, one photographing device 10 may be provided for one projection device 20, or multiple photographing devices 10 may be provided for one projection device 20, or multiple projection devices 20 may be provided for one photographing device 10.

[0020] The photographing device 10 is disposed at a position where the whole or at least a part of the flower field can be photographed. For example, when one photographing device 10 is used, the flower field may be arranged to be within the angle of view of the photographing device 10. When multiple photographing devices 10 are used, each photographing device 10 may photograph a part of the flower field, and the flower field may be arranged to be within the combined angle of view of the multiple photographing devices 10. A known digital camera may be used as the photographing device 10. Image data acquired by the photographing device 10 is transmitted to the control device 40, where predetermined image processing is performed. The image data is stored in the control device 40. The digital camera includes, for example, a lens, a mechanical shutter, a shutter driver, a photoelectric conversion element such as a CCD image sensor unit or a CMOS image sensor unit, a digital signal processor (DSP) that reads the charge amount from the photoelectric conversion element and generates image data, and an IC memory.

[0021] The projection device 20 is disposed at a position where it can project image light onto the whole or at least a part of the flower field. For example, when one projection device 20 is used, the flower field may be arranged to be within the projection range of the projection device 20. When multiple projection devices 20 are used, each projection device 20 may project light onto a part of the flower field, and the flower field may be arranged to be within the combined projection range of the multiple projection devices 20. A known commercial projector may be used as the projection device 20. When a projection image is generated by the control device 40, the projection image is transmitted to the projection device 20. The projection device 20 converts the projection image received from the control device 40 into image light and irradiates it onto the flower field under the control of the control device 40.

[0022] The detection device 30 detects objects in or around the flower field. The objects to be detected are mainly spectators (people). When the detection device 30 detects a spectator, it can change the irradiation conditions (such as light intensity and color) of the image light irradiated around the spectator. The detection device 30 may be installed in the flower field, around the flower field, or in multiple locations such as a passageway for spectators between the flower fields. As the detection device 30, various known sensors such as a range sensor, an infrared sensor, a light sensor, an ultrasonic sensor, a capacitance sensor, a pressure sensor, a sound sensor, and a temperature sensor can be adopted. In addition, as the detection device 30, it is also possible to adopt multiple sensors with different functions, such as a combination of a range sensor and an infrared sensor. In particular, it is preferable that the detection device 30 adopts a range sensor to detect the position of the spectator in the flower field. The range sensor is a two-dimensional scanning type optical distance measuring sensor that emits an inspection light (laser) and scans the inspection light to measure the distance and angle to the contact position by the viewer. The information detected by the range sensor is transmitted to the control device 40. If the position coordinates of the range sensor in real space are known, the control device 40 can detect the position coordinates of the object in real space by measuring the distance and angle to the object that has come into contact with the light emitted from the range sensor. Such detection information by the detection device 30 is sent to the control device 40 in real time and is used, for example, to control the projection device 20.

[0023] The control device 40 is a computer for controlling the projection device 20 based on input information from the image capture device 10 and the detection device 30. The block diagram in Fig. 2 mainly shows the functional elements of the control device 40. In the embodiment shown in Fig. 2, the control device 40 is configured by one computer for convenience, but the control device 40 may be configured by distributing functions among multiple computers. Also, a server-type computer on the cloud can be used as the control device 40.

[0024] As shown in FIG. 2, the control device 40 includes a processor 41, a memory 42, and a content storage unit 43. Examples of the processor 41 include a known CPU or GPU. The memory is composed of a volatile memory such as a RAM (Random Access Memory). The processor 41 performs a predetermined arithmetic processing and image processing according to the programs and data stored in the memory 42, and executes various control processing while writing the results of the processing in the working space of the memory. The content storage unit 43 is a storage for storing image data to be projected onto the flower field by the projection device 20. The content storage unit 43 is composed of a non-volatile memory such as a ROM (Read Only Memory) or a flash memory, and an HDD (Hard Disk Drive). The processor 41 reads image data from the content storage unit 43 and temporarily expands it in the memory 42, and performs coordinate conversion and mask processing on the image data to generate a projection image to be transmitted to the projection device 20. The content storage unit 43 may store a program used for processing by the processor 41.

[0025] 2 shows the processes executed by the processor 41 as functional blocks. That is, in this embodiment, the processor 41 includes a calibration unit 41a, a mask generation unit 41b (image analysis means), and a mapping unit 41c (projection control means). Each of these functional blocks 41a to 41c is a function realized by the processor 41 as a result of the processor 41 executing processes according to a program.

[0026] The calibration unit 41a performs a calibration process to calculate a coordinate conversion map that associates the camera coordinate system of the image capture device 10 with the projector coordinate system of the projection device 20. That is, since there is a physical deviation between the viewpoint of the image capture device 10 and the viewpoint of the projection device 20 as shown in FIG. 1, in order to control the projection device 20 based on the captured image of the image capture device 10, it is necessary to obtain a map in advance for converting between the camera coordinates of the image capture device 10 and the projector coordinate system of the projection device 20. The calibration unit 41a performs such a calibration process. In this embodiment, the calibration process is performed by projecting a set of black and white striped patterns called a gray code pattern from the projection device 20 onto a flower field, and capturing the gray code pattern projected onto the flower field with the image capture device 10.

[0027] First, the calibration unit 41a controls the projection device 20 to project the Gray code pattern toward the flower field. The calibration unit 41a also adjusts the distortion and focus of the image projected from the projection device 20 while changing the width and direction of the stripes of the Gray code pattern so that the image capture device 10 can capture the Gray code pattern correctly. At this time, the calibration unit 41a may adjust the gain, shutter speed, white balance, etc. of the image capture device 10. The adjustment of the image capture device 10 and the projection device 20 may be performed automatically or manually.

[0028] Next, the calibration unit 41a starts the calibration process. The calibration unit 41a sends the gray code pattern to the projection device 20, and the projection device 20 projects the gray code pattern onto the flower field. The photographing device 10 photographs the flower field onto which the gray code pattern is projected, and sends the photographed image to the calibration unit 41a. The calibration unit 41a obtains a C→P map indicating which coordinates (Cx, Cy) in the camera coordinate system of the photographing device 10 correspond to which coordinates (Px, Py) in the projector coordinate system of the projection device 20 by investigating the order in which black and white were reflected in each pixel of the photographed image. In addition, the calibration unit 41a calculates backwards from the C→P map to obtain a P→C map indicating which coordinates (Px, Py) in the projector coordinate system correspond to which coordinates (Cx, Cy) in the camera coordinate system. Note that missing parts of the P→C map are supplemented by interpolation. The calibration unit 41a stores the C→P map and the P→C map in the memory 42. The C→P map and the P→C map can convert between the camera coordinate system and the projector coordinate system. In this specification, the combination of the C→P map and the P→C map is also referred to as a coordinate conversion map. That is, this coordinate conversion map associates each pixel of the captured image acquired by the photographing device 10 with each pixel of the projected image output by the projection device 20. In addition, when the projection area of ​​one projection device 20 is photographed by multiple photographing devices 10, this coordinate conversion map associates the coordinates of the camera coordinate systems of the multiple photographing devices 10 with the coordinates of the projector coordinate system of one projection device 20. The processor 41 reads this coordinate conversion map from the memory 42 as necessary and uses it. However, if the positions of the photographing device 10 and the projection device 20 are the same or the positional deviation between them is small enough to be negligible, this calibration unit 41a can be omitted.

[0029] The mask generation unit 41b has a function of analyzing a photographed image of a flower field acquired by the photographing device 10, identifying a predetermined portion in the photographed image, and generating a mask image for distinguishing the predetermined portion from other portions. The mask image used in the present invention is a binary image for distinguishing an area (projection area) onto which light is projected from the projection device 20 and other areas (non-projection area). In this embodiment, the mask generation unit 41b generates a flower mask image in which a flower portion in the photographed image is extracted, and a grass portion image in which a grass portion in the photographed image is extracted, based on the photographed image. However, the grass mask image is not essential, and the mask generation unit 41b only needs to generate at least a flower mask image.

[0030] As an example, FIG. 3 shows a photographed image of a flower field before projection of image light. The photographed image is actually a photograph, but FIG. 3 shows the photographed image in a schematic line drawing. As shown in FIG. 3, the photographed image shows a flower field, and it can be seen that the photographed image includes flower parts, grass parts, and other parts (soil, etc.). The mask generating unit 41b analyzes such a photographed image and extracts all of the flower parts and grass parts. A known method may be used for the process of extracting a specific part from within an image. For example, based on the color values ​​(RGB) and brightness values ​​of the pixels constituting the image, a boundary line between a specific part (flower part or grass part) and other parts may be specified, and the inside of the boundary line may be extracted as the specific part. Since the color of the flower part differs depending on the type of plant, it is preferable to set a range of color values ​​to be extracted as the flower part in advance. Furthermore, since the color of the grass part is generally green, a range of color values ​​that a human can recognize as green may be set as the grass part. In addition, the mask generating unit 41b may identify flower and grass parts in the captured image by using a trained model created by performing well-known machine learning such as deep learning.

[0031] FIG. 4 shows examples of a flower mask image and a grass mask image created from the captured image shown in FIG. 3. As shown in FIG. 4, in the flower mask image, a flower portion is extracted from the captured image (FIG. 3). Similarly, in the grass mask image, a grass portion is extracted from the captured image (FIG. 3). In the flower mask image, the area extracted as the flower portion corresponds to the area (projection area) onto which light is projected from the projection device 20, and the other portion corresponds to the area (non-projection area) onto which light is not projected from the projection device 20. Similarly, in the grass mask image, the area extracted as the grass portion corresponds to the area (projection area) onto which light is projected from the projection device 20, and the other portion corresponds to the area (non-projection area) onto which light is not projected from the projection device 20.

[0032] Furthermore, the flower mask image and the grass mask image can be synthesized into a single RGB image (although it is also possible not to synthesize them). Specifically, in a synthesized mask image having pixel values ​​of three channels (R, G, B), for example, the projection area of ​​the flower mask image is represented by the R channel, and the projection area of ​​the grass mask image is represented by the G channel. In this case, the projection area of ​​the flower mask image is an area with pixel values ​​of (255, 0, 0), and the projection area of ​​the grass mask image is an area with pixel values ​​of (0, 255, 0). It is of course possible to represent the projection area of ​​the flower mask image by the G channel or the B channel, or the projection area of ​​the grass mask image by the R channel or the B channel.

[0033] In addition, in the composite mask image, when two channels are used for the flower mask image and the grass mask image, one more channel is left. This remaining channel can be a mask image having an arbitrary projection area. For example, when the light from the projection device 20 does not easily reach a place on the back side of the photographed image, it is necessary to increase the amount of light irradiated to this place on the back side compared to other places. In such a case, a range corresponding to the place on the back side of the photographed image can be set as a projection area in the arbitrary mask image, and the amount of light irradiated to this place on the back side can be individually increased. In addition, in the arbitrary mask image, for example, a place where the light from the projection device 20 does not easily reach can be freely set as a projection area. The projection area in the arbitrary mask image may be set manually. As described above, for example, when the flower mask image is set as the R channel and the grass mask image is set as the G channel, this arbitrary mask image will use the remaining B channel. In this case, the projection area of ​​the arbitrary mask image is, for example, an area having pixel values ​​of (0,0,255).

[0034] As described above, by generating mask images for the flower and grass parts of the captured image, the illumination conditions of the light projected onto the flowers and grass in the flower field can be individually adjusted. For example, the projection area (flower part) of the flower mask image is illuminated with 100% light from the projection device 20, and the projection area (grass part) of the grass mask image is illuminated with 30% light from the projection device 20, making it possible to individually control the amount of light. In this way, when making the flowers in the flower field stand out, it is preferable that the amount of light illuminated onto the flower part is greater than the amount of light illuminated onto the grass part. For example, when the maximum amount of light that can be illuminated from the projection device 20 is 100%, the amount of light on the flower part may be 50% or more and 100% or less, while the amount of light on the grass part may be 1% or more and less than 50%. In addition to the amount of light, it is also possible to individually adjust the color of the light projected onto the flower part and the grass part from the projection device 20. The same applies to the projection area of ​​any mask image.

[0035] Moreover, since the mask image is generated based on the captured image in the camera coordinate system, the mask image is also expressed in the camera coordinate system. Therefore, the mask generation unit 41b performs a calculation to convert this mask image from an image in the camera coordinate system to an image in the projector coordinate system. When performing this calculation, the mask generation unit 41b refers to the coordinate conversion map obtained by the calibration unit 41a. Since the coordinate conversion map is stored in the memory 42, the mask generation unit 41b only needs to read the coordinate conversion map from the memory 42. Specifically, the coordinate conversion map includes a C→P map that indicates which coordinates (Cx, Cy) in the camera coordinate system correspond to which coordinates (Px, Py) in the projector coordinate system. The mask generation unit 41b only needs to convert the mask image from an image in the camera coordinate system to an image in the projector coordinate system by referring to the C→P map. In particular, the coordinate values ​​of the transparent area in the mask image are converted from the camera coordinate system to the projector coordinate system.

[0036] The mapping unit 41c has a function of generating a projection image and controlling the projection device 20 to output the projection image. Specifically, the mapping unit 41c first reads image data in the content storage unit 43 or image data expanded in the memory 42. This image data may simply be data specifying a single color such as white, or may be data specifying a plurality of colors that differ for each region, or may be data expressing figures, symbols, patterns, etc. The image data may also include information that individually specifies the amount of image light to be projected onto the flowers and grass in the flower field. The image data is not limited to still images, and may be video.

[0037] Next, the mapping unit 41c obtains a composite image by combining the mask image (which has been subjected to coordinate conversion) generated by the mask generating unit 41b with the image data. In this embodiment, the mask image includes information on the light-projected area of ​​the flower part and the light-projected area of ​​the grass part as described above. By combining this mask image with the image data, data of the part of the image data corresponding to the light-projected area of ​​the flower part and the light-projected area of ​​the grass part is cut out, and data of the part corresponding to the other non-posted area is removed.

[0038] Next, the mapping unit 41c maps the composite image onto the projection surface of the flower field. Here, the mapping unit 41c converts the composite image expressed in the projector coordinate system into a projection image expressed in the camera coordinate system. In particular, in the projection image, the coordinates of the projection area of ​​the composite image are converted into the corresponding coordinates of the camera coordinate system. When generating this projection image, the mapping unit 41c refers to the coordinate conversion map determined by the calibration unit 41a. Since the coordinate conversion map is stored in the memory 42, the mask generation unit 41b only needs to read the coordinate conversion map from the memory 42. Specifically, the coordinate conversion map includes a P→C map that indicates which coordinates (Px, Py) in the projector coordinate system correspond to which coordinates (Cx, Cy) in the camera coordinate system. The mapping unit 41c converts the coordinates of the light-projected area included in the composite image into the coordinates of the camera coordinate system by referring to the P→C map. In particular, the coordinate values ​​of the transmission area in the composite image are converted from the projector coordinate system to the camera coordinate system. The mapping unit 41c sends the projection image in the camera coordinate system thus obtained to the projection device 20, and causes the projection device 20 to output the projection image. This allows the projection device 20 to project image light onto a targeted position (flowers or grass in a flower field) in the camera coordinate system.

[0039] In addition, this projected image is image data used to control the projection device 20, and in this embodiment, this data includes information on the irradiation conditions for the projection area (flower part) of the flower mask image and the irradiation conditions for the projection area (grass part) of the grass mask image. The projection device 20 adjusts the conditions for irradiating the image light onto the flower part and the grass part individually based on the information on the irradiation conditions. As described above, the light amount can be individually controlled, for example, by irradiating the flower part with light from the projection device 20 at 100% light amount and irradiating the grass part with light from the projection device 20 at 30% light amount. Also, FIG. 5 shows an example of an image of a flower field onto which image light is projected from the projection device 20 at night, for example, photographed by the photographing device 10. In particular, in this example, the irradiation conditions of the light projected onto the flowers and grass in the flower field are different from each other. For example, the image light from the projection device 20 is irradiated onto the flower in the flower field at 100% light amount, so the flower stands out. In addition, the projection device 20 projects 30% of the light onto the grass in the flower field, so the grass is illuminated brightly enough to highlight the flowers. On the other hand, the projection device 20 does not project any light onto the areas of the flower field other than the flowers and grass. This makes the flowers and grass in the flower field stand out.

[0040] In addition, when the detection device 30 detects that a person (audience) is near the flower field, the mapping unit 41c may control the projection device 20 in real time to execute some kind of interaction. For example, the mapping unit 41c may identify the coordinates of the real space where the person exists based on the detection information of the detection device 30, temporarily increase the amount of video light projected around the coordinates, or change the color of the video light projected around the coordinates. In this case, the mapping unit 41c may change the projection image sent to the projection device 20 in real time to control the projection device 20. This allows the audience to feel immersed in the video work using the flower field.

[0041] In the above, in order to express the contents of the present invention, the present specification has described the embodiments of the present invention with reference to the drawings. However, the present invention is not limited to the above-mentioned embodiments, and includes modifications and improvements that are obvious to a person skilled in the art based on the matters described in the present specification. [Explanation of symbols]

[0042] 10...photographing device 20...projection device 30...detection device 40...control device 41... Processor 41a... Calibration section 41b... Mask generation unit 41c... Mapping unit 42... memory 43... content storage unit 100…Lighting system

Claims

1. A lighting system comprising: a photographing device arranged at a position where a flower field can be photographed; a projection device arranged at a position where light can be projected onto the flower field; and a control device connected to the photographing device and the projection device, The control device includes: an image analysis means for analyzing an image of the flower field captured by the photographing device and identifying a flower portion in the captured image; and a projection control means for controlling the projection device so as to project light onto the flowers in the flower garden based on the analysis result by the image analysis means. Lighting system.

2. The image analysis means analyzes an image of the flower field captured by the photographing device, and identifies a flower portion and a grass portion in the captured image, The projection control means controls the projection device so as to project light onto the flowers and grass in the flower garden based on the analysis result by the image analysis means.

10. The lighting system of claim 1.

3. The projection control means controls the projection device so that lighting conditions for the flowers in the flower garden are different from lighting conditions for the grass.

3. The lighting system of claim 2.

4. the image control means generates a flower mask image in which a flower portion in the photographed image of the flower field is a projection region and the other portion is a non-projection region; The projection control means controls the projection device to project light onto the flowers in the flower field based on the flower mask image.

10. The lighting system of claim 1.

5. The image control means A flower mask image in which a flower part in the photographed image of the flower field is a projected area and the other part is a non-projected area; A grass mask image is generated in which the grass portion in the photographed image of the flower field is a projected region and the other portion is a non-projected region; The projection control means includes: projecting light onto flowers in the flower field based on the flower mask image; Controlling the projection device to project light onto the grass in the flower field based on the grass mask image.

3. The lighting system of claim 2.

6. the flower mask image is a projection area represented by any one of RGB values; the grass mask image expresses the projection region in another one of RGB values; The flower mask image and the grass mask image are combined into one image expressed in RGB values.

6. A lighting system according to claim 5.

7. A control device including one or more computers connected to a photographing device disposed at a position capable of photographing a flower field and a projection device disposed at a position capable of projecting light onto the flower field, an image analysis means for analyzing an image of the flower field captured by the photographing device and identifying a flower portion in the captured image; and a projection control means for controlling the projection device so as to project light onto the flowers in the flower garden based on the analysis result by the image analysis means. Control device.

8. A step of acquiring an image of a flower field by an image capturing device; A control device analyzes a photographed image of the flower field to identify a flower portion in the photographed image, and generates a control signal for a projection device to project light onto the flowers in the flower field based on a result of the analysis of the photographed image; The projection device projects a signal onto the flowers in the flower garden based on the control signal. lighting method.

Images