WO2017033386A1

WO2017033386A1 - Illumination system and program

Info

Publication number: WO2017033386A1
Application number: PCT/JP2016/003200
Authority: WO
Inventors: 伸裕見市
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2015-08-26
Filing date: 2016-07-05
Publication date: 2017-03-02
Also published as: JPWO2017033386A1

Abstract

The present invention is provided with: a video projection unit (10) that projects video as a first illumination light; an illumination unit (20) that radiates a second illumination light from a light source different to the light source of the video projection unit (10); an imaging unit (30) that picks up, as an imaging region, a region including a region irradiated by the second illumination light radiated from the illumination unit (20) and the first illumination light projected by the video projection unit (10); and an illumination control unit (41) that compares the first illumination light and the second illumination light on the basis of a picked up image picked up by the imaging unit (30), and controls at least one among the video projection unit (10) and the illumination unit (20) so as to reduce the difference in color between the first illumination light and the second illumination light.

Description

Lighting system and program

The present invention relates to an illumination system and a program used for the illumination system.

Semiconductor light emitting devices such as LEDs (LED: Light Emitting Diode) and lasers (LD: Laser Diode) are expected to serve as light sources for various products because of their long life and power saving.

In recent years, the light source of a projector is being replaced by a semiconductor light emitting element from a lamp, and the light source of the projector has a longer life and power saving. Along with this, use of projectors not only for video projection but also for illumination has been studied.

On the other hand, a semiconductor light emitting element such as an LED is also used as a light source for the illuminating device, and the use of the illuminating device not only for illumination but also for video projection is being studied. For example, Patent Literature 1 discloses an illumination device having an illumination function and a video projection function.

For this reason, it is considered that the use of video projection technology such as projectors will expand in the lighting industry such as stores or houses in the future.

JP 2006-127845 A

In a usage scene of a projector in a store or a house, it is conceivable that an image of an illumination pattern is projected onto a wall surface, a floor surface, a desk surface, or the like using a projector as an alternative to the illumination device together with the illumination device.

However, there is a problem that the color of the image (illumination pattern) projected from the projector and the illumination light emitted from the illumination device does not match. For this reason, the observer may feel uncomfortable.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an illumination system and program capable of aligning the color of the image by the image projection unit and the color of the illumination light by the illumination unit. And

In order to achieve the above object, one aspect of an illumination system according to the present invention is a video projection unit that projects an image as first illumination light, and a second illumination light by a light source different from the light source of the image projection unit. An imaging unit that images an area including an area irradiated by the first illumination light projected by the video projection unit and the second illumination light irradiated by the illumination unit as an imaging region And comparing the first illumination light and the second illumination light based on a captured image captured by the imaging unit, and reducing the difference in color between the image projection unit and the illumination unit. A lighting control unit that controls at least one of the lighting system.

Note that the present invention can also be realized as a program for causing a computer to function as the lighting system, or as a computer-readable recording medium storing the program.

The color of the video by the video projection unit and the color of the illumination light by the illumination unit can be matched.

FIG. 1 is a diagram schematically illustrating a specific application example of the illumination system according to the embodiment. FIG. 2 is a diagram illustrating an example of a schematic configuration of the illumination system according to the embodiment and an image captured by the illumination system. FIG. 3 is a block diagram illustrating a configuration of the illumination system according to the embodiment. FIG. 4 is a diagram schematically illustrating an application example of a lighting system according to another embodiment.

Hereinafter, embodiments of the present invention will be described. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, numerical values, components, arrangement positions and connection forms of components, and steps and order of steps shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily shown strictly. In each figure, substantially the same configuration is denoted by the same reference numeral, and redundant description is omitted or simplified.

(Embodiment)
An illumination system 1 according to an embodiment will be described with reference to FIGS. FIG. 1 is a diagram schematically illustrating a specific application example of the illumination system 1 according to the embodiment. FIG. 2 is a diagram illustrating an example of a schematic configuration of the illumination system 1 and an image captured by the illumination system 1. FIG. 3 is a block diagram showing a configuration of the illumination system 1.

As shown in FIGS. 1 to 3, the illumination system 1 includes a video projection unit 10, an illumination unit 20, an imaging unit 30, and a processing unit 40.

In the present embodiment, a case where the lighting system 1 is used indoors such as in a store or a house will be described. As illustrated in FIG. 1, the video projection unit 10, the illumination unit 20, and the imaging unit 30 are installed in a room, for example. As an example, the video projection unit 10 and the imaging unit 30 are installed on the ceiling of a room, for example, and two illumination units 20 are installed on the wall surface of the room. However, the installation location of the video projection unit 10, the illumination unit 20, and the imaging unit 30 is not limited to this. For example, the video projection unit 10 and the imaging unit 30 may be installed on a wall surface. Moreover, the illumination part 20 may be installed in the ceiling.

Since the video projection unit 10 and the imaging unit 30 are installed at different positions, the viewpoint of the video projection unit 10 and the viewpoint of the imaging unit 30 are different, but the video projection unit 10 and the imaging unit 30 are the same. It may be installed at a position. In this case, the video projection unit 10 and the imaging unit 30 may be configured by a single device and have the same viewpoint.

The video projection unit 10 is a video projection device that projects an image on the projection surface 2. In the present embodiment, the image projection unit 10 projects an image in a situation where the illumination unit 20 emits illumination light (a state in which the illumination unit 20 is turned on).

The projection plane 2 onto which an image from the image projection unit 10 is projected may be either a plane or a three-dimensional plane, and includes any structure or animal or plant. As shown in FIGS. 1 and 2, the projection plane 2 in the present embodiment is a desk surface of a desk installed in a room. For example, an image of an illumination pattern is projected onto the projection surface 2 by the image projection unit 10. The projection surface 2 is not limited to a desk surface, and may be a wall surface, a floor surface, a screen, or the like.

The video projection unit 10 includes a light source such as a semiconductor laser and a lamp, an optical system such as a lens and a mirror, a display element such as a liquid crystal panel, and a projection lens. For example, when an image to be projected onto the projection surface 2 is input from the processing unit 40 to the image projection unit 10, an image is projected from the projection lens of the image projection unit 10 toward the projection surface 2. In the present specification, the video (image) may be either a still image or a moving image.

In the present embodiment, the video projection unit 10 not only has a function of projecting a video, but also has a function of irradiating the projection surface 2 with illumination light. The image projection unit 10 projects an image as the first illumination light (illumination pattern).

Specifically, as shown in FIGS. 1 and 2, the image projection unit 10 irradiates illumination light (image) so as to illuminate an illumination object (for example, a wine bottle) installed on the projection surface 2. . 1 and 2, illumination light (video) from the video projection unit 10 on the projection plane 2 is indicated by a region A10 surrounded by a broken line. That is, the area A10 indicates a first irradiation area (projection area) of illumination light (video) by the video projection unit 10 on the projection plane 2.

As described above, the image projection unit 10 is an optical projection device that projects both image light (image) and illumination light. Thereby, the video projection unit 10 can perform not only a video effect but also an illumination effect. In this case, the image light and the illumination light may be projected so as to overlap in time and space, or may be projected while being switched at different timings. In the former case, for example, the video projection unit 10 projects a video in which video light and illumination light are superimposed. In the video projection unit 10, the illumination light source and the video light source may be the same or different. The video projection unit 10 may have a light control function and a color control function so that the brightness or color component of the illumination light to be projected can be changed.

The illumination unit 20 is an illumination device that irradiates illumination light, and is, for example, a spotlight installed on a wall surface of a room. The illumination unit 20 may be a ceiling or downlight installed on the ceiling of the room. Moreover, although the two illumination parts 20 are installed, it is not restricted to this, One or three or more plural may be sufficient.

Each lighting unit 20 has a light source such as an LED or a lamp. Each illumination unit 20 has a light source different from the light source of the video projection unit 10. That is, each illumination unit 20 emits illumination light (second illumination light) from a light source different from the light source of the video projection unit 10. The illumination light of each illumination unit 20 is, for example, white light, but is not limited to white light.

Each illumination unit 20 irradiates the projection surface 2 with illumination light. Specifically, as shown in FIGS. 1 and 2, each of the two illumination units 20 irradiates illumination light so as to illuminate an illumination object (for example, a wine bottle) installed on the projection surface 2. . 1 and 2, illumination light from each illumination unit 20 on the projection plane 2 is indicated by a region A20 surrounded by a broken line. That is, the area A <b> 20 indicates the second irradiation area of the illumination light from the illumination unit 20 on the projection plane 2.

In the present embodiment, the illumination unit 20 includes a red light source, a green light source, and a blue light source, and is capable of RGB control. That is, the red light source, the green light source, and the blue light source can be controlled independently. The red light source, the green light source, and the blue light source may be LED light sources or existing lamp light sources.

The illumination unit 20 has a light control function and a color control function, and is configured to control at least one of the brightness and color components of the illumination light. For example, the illumination unit 20 can increase or decrease the light output of illumination light based on a control signal from the illumination control unit 41 of the processing unit 40. The illumination unit 20 can selectively strengthen or weaken at least one of the red component, the green component, and the blue component of the illumination light based on the control signal from the illumination control unit 41.

The illumination unit 20 configured in this way is controlled based on a control signal transmitted from the illumination control unit 41. Specifically, the illumination light of the illumination unit 20 is controlled by a control signal from the illumination control unit 41 based on the analysis result of the captured image captured by the imaging unit 30.

The imaging unit 30 is an imaging device such as a camera, for example, and is irradiated by the video projected by the video projection unit 10 (first illumination light) and the illumination light irradiated by the illumination unit 20 (second illumination light). An area including the area is imaged as an imaging area. Specifically, as illustrated in FIG. 2, the imaging unit 30 captures an area including the projection plane 2 as an imaging area. That is, the imaging unit 30 captures an area including an image (first illumination light) from the image projection unit 10 projected on the projection plane 2 and illumination light (second illumination light) from the illumination unit 20. As an image.

The imaging unit 30 includes, for example, an imaging element such as a CCD image sensor or a CMOS image sensor, an optical system, and the like. The captured image (image data) captured by the imaging unit 30 is transmitted to the processing unit 40.

The processing unit 40 is a processing device having a function of performing various arithmetic processes. The processing unit 40 includes an illumination control unit 41, a projection video output unit 42, a distortion correction unit 43, and a luminance correction unit 44.

The processing unit 40 also has a function of transmitting and receiving signals to and from the video projection unit 10, the illumination unit 20, and the imaging unit 30. That is, the processing unit 40 includes a communication unit such as an interface. Transmission and reception of signals between the processing unit 40 and the video projection unit 10, the illumination unit 20, or the imaging unit 30 may be performed by either wired or wireless. As shown in FIG. 2, as the processing unit 40, for example, a personal computer (PC) can be used.

The illumination control unit 41 uses the image projected by the image projection unit 10 based on the captured image captured by the imaging unit 30 (first illumination light) and the illumination light irradiated by the illumination unit 20 (second illumination light). Are compared, and at least one of the image projection unit 10 and the illumination unit 20 is controlled so that the difference between the two colors is reduced.

Specifically, the illumination control unit 41 includes the imaging unit 30 so as to include the image projected by the image projection unit 10 (first illumination light) and the illumination light irradiated by the illumination unit 20 (second illumination light). Acquire the captured image captured in step.

Further, the illumination control unit 41 analyzes the acquired captured image, so that the video projected by the video projection unit 10 (first illumination light) and the illumination light irradiated by the illumination unit 20 (second illumination light) And a control signal is generated so that the difference in color between the first illumination light and the second illumination light is reduced. The control signal may control both the video projection unit 10 and the illumination unit 20, or may control only one of the video projection unit 10 and the illumination unit 20.

Then, the illumination control unit 41 transmits the generated control signal to the video projection unit 10 and the illumination unit 20. In this case, the control signal is transmitted only to the image projection unit 10 when only the image (first illumination light) of the image projection unit 10 is changed, and only the illumination light (second illumination light) of the illumination unit 20 is transmitted. When changing, it transmits only to the illumination part 20, and when changing both the image | video of the image projection part 10 and the illumination light of the illumination part 20, it transmits to both the image projection part 10 and the illumination part 20.

In addition, when the illumination control unit 41 changes the video of the video projection unit 10, the illumination control unit 41 changes the video of the video projection unit 10 by transmitting a control signal to the projection video output unit 42. That is, the video projection unit 10 projects the changed video by receiving the changed video from the projection video output unit 42.

The video projection unit 10 and the illumination unit 20 are responsive to a control signal from the illumination control unit 41 to generate an image projected by the video projection unit 10 (first illumination light) and illumination light emitted from the illumination unit 20 (second illumination light). The light control and / or the color control is performed so that the difference in color from the above is reduced.

The analysis of the captured image captured by the imaging unit 30 can be performed, for example, based on the RGB component (RGB signal) of each pixel of the captured image captured by the imaging unit 30. Specifically, the RGB signal of each pixel of the captured image is converted into a luminance signal and a color signal, and the color difference between the first illumination light and the second illumination light is reduced based on the color signal. Such a control signal is generated. The analysis of the captured image may use an average value of RGB or the like.

The projection video output unit 42 outputs a video to be projected on the video projection unit 10 to the video projection unit 10. Note that the processing unit 40 may have a function of playing back and stopping the video output to the video projection unit 10.

The distortion correction unit 43 corrects distortion of the projected image. The distortion correction unit 43 corrects, for example, geometric distortion (trapezoid distortion) of an image projected from the image projection unit 10.

The brightness correction unit 44 corrects the brightness of the projected image. For example, the luminance correction unit 44 corrects the luminance of the whole or a part of the video projected from the video projection unit 10.

In addition, the process part 40 may have a memory | storage part (memory). The storage unit stores data processed or calculated by the processing unit 40 or stores video (video content) output from the projection video output unit 42 to the video projection unit 10. The storage unit is also used when performing control processing by the processing unit 40, and stores data as needed as a work area when the illumination control unit 41 performs various data processing and calculations, for example. The storage unit may store an application program for controlling the video projection unit 10, the illumination unit 20, and the imaging unit 30.

Further, the processing unit 40 may include a video acquisition unit (video input unit) that acquires a video to be projected on the video projection unit 10. The video acquisition unit acquires a video to be projected on the video projection unit 10 as an input video. The input video may be acquired from a recording medium such as an SD card that is detachably attached to the processing unit 40, or from an external device via a communication line such as an HDMI (registered trademark) cable connected to the processing unit 40. It may be acquired, or may be acquired from an external device using wireless communication such as Wi-Fi.

As described above, according to the illumination system 1 according to the present embodiment, the image projected by the image projection unit 10 (first illumination light) and the illumination light irradiated by the illumination unit 20 (second illumination light) are imaged. Based on the captured image, the first illumination light and the second illumination light are compared, and at least one of the video projection unit 10 and the illumination unit 20 is controlled so that the difference in color between the two is reduced. Yes.

This makes it possible to align the color of the video by the video projection unit and the color of the illumination light by the illumination unit.

Furthermore, the illumination control unit 41 may match the color of the second illumination light with the color of the first illumination light. That is, the illumination control unit 41 may control at least one of the video projection unit 10 and the illumination unit 20 so that the color of the first illumination light matches the color of the second illumination light.

This makes it possible to further match the color of the image by the image projection unit and the color of the illumination light by the illumination unit.

Further, as shown in FIG. 4, a region A10 irradiated with an image (first illumination light) from the image projection unit 10 and a region A20 irradiated with illumination light (second illumination light) from the illumination unit 20 are provided. When the image projection unit 10 and the illumination unit 20 irradiate the first illumination light and the second illumination light so that the overlapping overlap area AO exists, the illumination control unit 41 includes the first illumination light and the second illumination light. The difference between the colors of the illumination light may be determined using the overlap area AO. That is, the color difference between the first illumination light and the second illumination light may be determined in the same region (for example, the same surface on the projection surface 2).

Thus, by determining the color of the first illumination light and the color of the second illumination light in the same region, the color of the image of the image projection unit 10 and the color of the illumination light of the illumination unit 20 are more accurate. Can be well aligned.

In addition, when analyzing the color in said overlapping area, you may analyze based on the picked-up image when 1st illumination light and 2nd illumination light are irradiated simultaneously, or 1st illumination light Analysis may be performed based on two captured images when the second illumination light and the second illumination light are alternately irradiated.

Further, in the present embodiment, a distortion correction unit 43 that corrects the distortion of the projected video and a luminance correction unit 44 that corrects the luminance of the projected video are provided.

Thereby, distortion correction and luminance correction can be performed on the image projected by the image projection unit 10, so that a more easily viewable image can be projected.

(Modification)
While the lighting system according to the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments.

For example, in the above-described embodiment, the distortion correction unit 43 and the luminance correction unit 44 are provided in the processing unit 40, but are not limited thereto. The distortion correction unit 43 and the luminance correction unit 44 may be provided in the video projection unit 10.

In the above embodiment, the video acquisition unit is provided in the processing unit 40, but is not limited thereto. The video acquisition unit may be directly provided in the video projection unit 10, and an input video may be directly input to the video projection unit 10.

In the above embodiment, the case where the lighting system is used indoors such as a room has been described. However, the present invention is not limited to this. For example, the lighting system in the above embodiment may be used outdoors.

In the above embodiment, the illumination unit 20 is controlled using the RGB statistics in the captured image. However, the present invention is not limited to this. That is, instead of using the statistics regarding RGB in the captured image, the illumination light of the illumination unit 20 may be controlled to match the projected image using other characteristic parameters of the captured image.

In addition, a form obtained by making various modifications conceived by those skilled in the art to the above-described embodiment, or by arbitrarily combining the components and functions in the above-described embodiment without departing from the gist of the present invention. Implemented forms are also included in the present invention.

In the above description, each component in the processing unit 40 may be a circuit. These circuits may constitute one circuit as a whole, or may be separate circuits. Each of these circuits may be a general-purpose circuit or a dedicated circuit.

Further, the computer may function as the lighting system. In this case, each process described as the operation of each component used in the illumination system, such as the processing unit 40, can be executed by a computer. For example, a computer executes each of the above processes by executing a program using hardware resources such as a processor (CPU), a memory, and an input / output circuit. Specifically, each process is executed by the processor obtaining data to be processed from a memory or an input / output circuit or the like and calculating the data, or outputting the calculation result to the memory or the input / output circuit or the like. . As an example, the processing unit 40 is a notebook PC.

Further, the lighting system may be realized as a lighting control method. In this case, the steps in the lighting control method can be executed by a computer.

Further, the program for executing each of the above processes or steps may be recorded on a non-transitory recording medium such as a computer-readable CD-ROM. In this case, the computer reads the program from the non-temporary recording medium and executes the program to execute each process. For example, the method in the lighting system can be realized as a program that causes a computer to execute the method, or can be realized as a computer-readable recording medium that records such a program.

DESCRIPTION OF SYMBOLS 1 Illumination system 2 Projection surface 10 Image | video projection part 20 Illumination part 30 Imaging part 41 Illumination control part 43 Distortion correction part 44 Luminance correction part

Claims

An image projection unit that projects an image as the first illumination light;
An illumination unit that irradiates the second illumination light with a light source different from the light source of the video projection unit;
An imaging unit that captures an area including an area irradiated by the first illumination light projected by the video projection unit and the second illumination light irradiated by the illumination unit as an imaging area;
At least one of the video projection unit and the illumination unit is configured such that the first illumination light and the second illumination light are compared based on a captured image captured by the imaging unit and a color difference between the two is reduced. An illumination control unit for controlling one of them,
Lighting system.
In the video projection unit and the illumination unit, the first illumination light and the second illumination unit are provided such that there is an overlapping region where the illumination region of the first illumination light and the illumination region of the second illumination light overlap. Irradiate the illumination light of
The illumination control unit determines a difference between the two colors using the overlapping region.
The lighting system according to claim 1.
The illumination control unit matches the color of the second illumination light to the color of the first illumination light;
The illumination system according to claim 1 or 2.
A distortion correction unit that corrects distortion of the projected image;
A brightness correction unit that corrects the brightness of the projected image;
The illumination system according to any one of claims 1 to 3.
A program for causing a computer to function as the lighting system according to any one of claims 1 to 4.