JP2019197122A - Control method for image projection system, image projection system, and projectors - Google Patents

Abstract

To provide a control method for an image projection system capable of transmitting information among a plurality of projectors without performing communication via a network or the like, and the image projection system and the projectors.SOLUTION: A control method for an image projection system projecting images by a plurality of projectors 1 projects a QR code 200 by a projector 1a, images the QR code 200, generates a picked-up image in a projector 1b, acquires a data table as arrangement information on the basis of the generated picked-up image, generates the QR code 200 on the basis of the acquired data table and a data table stored by itself, and projects the generated QR code 200 by the projector 1b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image projection system control method, an image projection system, and a projector.

  A system is known that displays a single large image by projecting a plurality of images side by side with a plurality of projectors (see, for example, Patent Document 1). In the system described in Patent Document 1, each projector recognizes the position of the adjacent projector by capturing an identification image such as a QR code (registered trademark) projected by the adjacent projector. One main projector can collect information from other projectors via a network or the like to detect the arrangement order of all the projectors.

JP 2017-191307 A

  However, since the system described in Patent Document 1 is configured to communicate between projectors via a network or the like, the user has to perform complicated procedures such as work for establishing a communication environment and setting operations. It has a problem of not becoming.

  A control method for an image projection system according to the present application is a control method for an image projection system in which an image is projected by a plurality of projectors including a first projector and a second projector, and the second identification is performed by the second projector. An image is projected, the first projector captures the second identification image to generate a first captured image, and the first projector based on the generated first captured image, First external information is acquired, and in the first projector, a first identification image is obtained based on the acquired first external information and first internal information stored in the first projector. The first identification image is generated and projected by the first projector.

  In the control method of the image projection system, the second projector captures the first identification image to generate a second captured image, and the second projector generates the second captured image. Based on the image, the second external information is acquired, and in the second projector, based on the acquired second external information and the second internal information stored in the second projector, It is desirable to update the second identification image and project the updated second identification image by the second projector.

  In the control method of the image projection system, the first projector captures the updated second identification image to generate the first captured image, and the first projector includes the first projection image. It is desirable that the first identification image is updated based on the first external information acquired from the captured image, and the updated first identification image is projected by the first projector.

  In the control method of the image projection system, the image projection system further includes a third projector, and the third projector captures the first identification image projected by the first projector. desirable.

  In the control method of the image projection system, the first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors. In the first projector, the first imaging Based on the position of the second identification image in the image, the relative position of the image projected by the second projector with respect to the image projected by the first projector is acquired as the first external information, and the first In one projector, it is preferable that the array information is updated based on the acquired first external information, and the first identification image is generated based on the updated array information.

  In the control method of the image projection system, the first projector measures at least one of a color and brightness of an image to be projected, and stores first measurement information according to a measurement result as the internal information, The second projector measures at least one of a color and brightness of an image to be projected, generates and projects the second identification image storing second measurement information according to a measurement result, and In the first projector, the second measurement information is acquired as the first external information, and in the first projector, based on the acquired second measurement information and the first measurement information. Thus, it is desirable to generate the first identification image.

  In the control method of the image projection system, the first projector corrects an image projected by the second projector based on the acquired second measurement information and the first measurement information. Correction information is determined, the first identification image is generated based on the determined correction information, and the second projector captures the first identification image to acquire the correction information. It is desirable to correct the image based on the correction information.

  The image projection system of the present application is an image projection system that projects an image by a plurality of projectors including a first projector and a second projector, and the second projector projects a second identification image. The first projector includes a first imaging unit that captures the second identification image and generates a first captured image, and the first imaging unit that is generated by the first imaging unit. Based on one captured image, a first acquisition unit that acquires first external information, a first storage unit that stores first internal information, and the first acquisition unit acquired by the first acquisition unit A first generation unit that generates a first identification image based on the first external information and the first internal information stored in the first storage unit, and the first generation unit. The generated first identification image A first projection section that projects, characterized in that it comprises a.

  In the image projection system, the second projector includes a second generation unit that generates the second identification image, and a second generation unit that captures the first identification image and generates a second captured image. An imaging unit, a second acquisition unit that acquires second external information based on the second captured image, and a second storage unit that stores second internal information. The second generation unit, based on the second external information acquired by the second acquisition unit and the second internal information stored in the second storage unit, It is desirable that the identification image is updated and the second projection unit projects the updated second identification image.

  In the image projection system, the first imaging unit captures the updated second identification image to generate the first captured image, and the first generation unit includes the first imaging unit. It is desirable that the first identification image is updated based on the first external information acquired from the captured image, and the first projection unit projects the updated first identification image.

  The image projection system preferably further includes a third projector that captures the first identification image projected by the first projector.

  In the image projection system, the first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors, and the first acquisition unit includes the first captured image in the first captured image. Based on the position of the second identification image, the relative position of the image projected by the second projector with respect to the image projected by the first projector is acquired as the first external information, and the first It is desirable that the generation unit updates the array information based on the acquired relative position, and generates the first identification image based on the updated array information.

  In the image projection system, the first projector further includes a first measurement unit that measures at least one of color and brightness of an image projected from the first projection unit, and the second projector includes: And a second measuring unit that measures at least one of color and brightness of an image projected from the second projecting unit, and the second identification image includes a measurement result by the second measuring unit. Corresponding second measurement information is stored, and the first internal information includes first measurement information according to a measurement result by the first measurement unit, and the first acquisition is performed. The unit acquires the second measurement information as the first external information, and the first generation unit is based on the acquired second measurement information and the first measurement information. Desirably, generating the first identification image There.

  In the image projection system, the second projector further includes a correction unit that corrects at least one of a color and brightness of an image projected from the second projection unit, and the first generation unit includes the acquisition unit. Correction information for correcting an image projected from the second projection unit is determined based on the second measurement information and the first measurement information, and based on the determined correction information The first identification image is generated, the second acquisition unit acquires the correction information as the second external information, and the correction unit adds the correction information acquired by the second acquisition unit to the correction information. It is desirable to correct the image based on it.

  The projector of the present application is a projector provided in an image projection system that projects an image by a plurality of projectors, the imaging unit that captures a second identification image projected by another projector and generates a captured image, and the imaging unit Based on the captured image generated by the above, an acquisition unit that acquires external information, a storage unit that stores internal information, the external information acquired by the acquisition unit, and the storage unit that is stored in the storage unit And a generation unit that generates a first identification image based on internal information, and a projection unit that projects the first identification image generated by the generation unit.

  In the projector described above, the internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors, and the acquisition unit is based on the position of the second identification image in the captured image. The relative position of the image projected by the other projector with respect to the image projected by the projector is acquired as the external information, and the generation unit obtains the arrangement information based on the relative position acquired by the acquisition unit. It is desirable to update and generate the first identification image based on the updated arrangement information.

  The projector may further include a measurement unit that measures at least one of color and brightness of an image projected from the projection unit, and the second identification image includes the color and brightness of an image projected by the other projector. Second measurement information according to a measurement result obtained by measuring at least one of the lengths is stored, and the internal information includes first measurement information according to a measurement result by the measurement unit, The acquisition unit acquires the second measurement information as the external information, and the generation unit is configured to generate the first measurement information based on the acquired second measurement information and the first measurement information. It is desirable to generate an identification image.

Explanatory drawing which shows an image projection system. 1 is a block diagram showing a schematic configuration of a projector. FIG. 2 is a block diagram showing a schematic configuration of an image projection unit provided in the projector. 6 is a flowchart showing the operation of the projector when automatically determining the arrangement of partial images. Explanatory drawing for demonstrating a data table. Explanatory drawing for demonstrating the position which displays a QR code. The table | surface which shows transition of the update of the data table of each projector. The table | surface which shows transition of the update of the data table of each projector. The table | surface which shows transition of the update of the data table of each projector. Explanatory drawing for demonstrating the example by which the partial image is arranged by another arrangement pattern. Explanatory drawing for demonstrating a correction process. Explanatory drawing for demonstrating a correction process. Explanatory drawing for demonstrating a correction process. Explanatory drawing for demonstrating a correction process. 6 is a flowchart for explaining the operation of an end projector when executing correction processing. 6 is a flowchart for explaining the operation of a relay projector when executing correction processing. 6 is a flowchart for explaining the operation of a master projector when executing correction processing.

Hereinafter, the image projection system of the present embodiment will be described with reference to the drawings.
FIG. 1 is an explanatory diagram showing an image projection system 100 of the present embodiment.
As shown in FIG. 1, the image projection system 100 includes three projectors 1 (projectors 1a, 1b, 1c). Each projector 1 projects and displays an image on a projection surface Sp such as a screen or a wall surface. The three projectors 1 cooperate with each other to display one large image (hereinafter also referred to as “projected image Pa”), so that the images projected from each projector 1 (hereinafter referred to as “partial image Pd”). Are installed next to each other. In the example of FIG. 1, each projector 1 is arranged so that three partial images Pd are arranged in a horizontal row. Each projector 1 is installed such that a part of each partial image Pd overlaps a part of the partial image Pd of the other projector 1. For this reason, there is no gap between the partial images Pd, and the partial images Pd can be smoothly connected. Hereinafter, the display of one projection image Pa by the cooperation of the plurality of projectors 1 is also referred to as “multi-projection”, and the area Ao where the partial images Pd overlap each other is also referred to as the “superimposition area Ao”. Call.

  The projector 1 can project a QR code (registered trademark) 200 in which information such as identification information is stored on the peripheral portion of its own partial image Pd. Further, the projector 1 can capture a range including at least the partial image Pd projected by itself. For this reason, when one projector 1 projects the QR code 200 in the superimposition area Ao among the two projectors 1 sharing one superimposition area Ao, the other projector 1 captures the QR code 200. , Information stored in the QR code 200 can be acquired. That is, each projector 1 of the image projection system 100 can transmit information to and from other projectors 1 by projecting the QR code 200 and imaging. For this reason, for example, processing for determining the arrangement of the partial images Pd and correcting variations in color and brightness between the partial images Pd can be realized by information transmission using the QR code 200. ing.

  Although not shown in FIG. 1, when a desired content is displayed as a projection image Pa by each projector 1, each projector 1 is connected to an external image supply device 3 (see FIG. 2), and the image is displayed. Image information corresponding to the content is supplied from the supply device 3.

FIG. 2 is a block diagram illustrating a schematic configuration of the projector 1, and FIG. 3 is a block diagram illustrating a schematic configuration of the image projection unit 17 provided in the projector 1.
As shown in FIG. 2, the projector 1 includes a control unit 10, a storage unit 11, an input operation unit 12, a remote control signal receiving unit 13, an imaging unit 14, an image information input unit 15, and an image information processing unit. 16 and an image projection unit 17 as a projection unit are integrally provided. The projector 1 projects an image from the image projection unit 17 onto the projection plane Sp based on the image information input to the image information input unit 15.

  The control unit 10 includes one or more processors, and performs overall control of the operation of the projector 1 by operating according to a control program (not shown) stored in the storage unit 11.

  The storage unit 11 includes a memory such as a random access memory (RAM) and a read only memory (ROM). The RAM is used for temporary storage of various data, and the ROM stores a control program and control data for controlling the operation of the projector 1. In the storage unit 11 of the present embodiment, identification information 31 unique to each projector 1 is stored, and a data table 32 is stored as array information used for determining the array of the partial images Pd.

  The input operation unit 12 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation unit 12 include a “power key” for switching the power on and off (standby), a “menu key” for displaying a menu image for performing various settings, and items on the menu image. There is a “direction key” for selecting. When the user operates various operation keys of the input operation unit 12, the input operation unit 12 outputs an operation signal corresponding to the operation content of the user to the control unit 10.

  The remote control signal receiving unit 13 includes a light receiving element, a decoder, and the like, and receives an infrared light operation signal emitted from the remote control 2 for remotely operating the projector 1. The remote controller 2 has a plurality of operation keys arranged. When the user operates the operation keys of the remote controller 2, the remote controller 2 transmits an operation signal corresponding to the operated operation key. The remote control signal receiving unit 13 receives and decodes the operation signal transmitted from the remote control 2 and outputs it to the control unit 10.

  The imaging unit 14 is a camera that includes an imaging element (not shown) such as a charge coupled device (CCD) sensor or a complementary metal oxide semiconductor (CMOS) sensor. The imaging unit 14 images the projection plane Sp based on the control of the control unit 10, generates a captured image as the imaging result, and outputs the captured image to the control unit 10. The imaging unit 14 captures at least a range in which an image (partial image Pd) is projected from the image projection unit 17. For this reason, as shown in FIG. 1, when the projector 1 is installed so that a part of the plurality of partial images Pd is superimposed, the imaging unit 14 at least superimposes the adjacent partial images Pd. An area included in the area Ao can be imaged.

  The image information input unit 15 is connected to an external image supply device 3 such as an image reproduction device, and receives image information corresponding to content from the image supply device 3. The image information input unit 15 can receive supply of image information stored in the storage unit 11 and image information generated by the control unit 10 from the control unit 10. The image information input unit 15 outputs the input image information to the image information processing unit 16. Hereinafter, image information input from the image supply device 3 or the control unit 10 to the image information input unit 15 is also referred to as “input image information”, and an image based on the input image information is referred to as “input image”. Also called.

  The image information processing unit 16 performs various processes on the input image information based on the control of the control unit 10, and sends the processed image information to the light valve driving unit 24 (see FIG. 3) of the image projection unit 17. Output. For example, the image information processing unit 16 performs processing for correcting the color and brightness of the projected image, processing for correcting distortion of the shape of the image, and OSD (on-screen display) such as a menu image or a message image on the input image. A process of superimposing an image is performed on the input image information as necessary. In the present embodiment, the QR code 200 projected by the projector 1 is an image that is superimposed as an OSD image on the input image by the image information processing unit 16.

  The image information input unit 15 and the image information processing unit 16 may be configured by one or a plurality of processors or the like, or a dedicated process such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). It may be constituted by a device.

  As shown in FIG. 3, the image projection unit 17 includes a light source 21, three liquid crystal light valves 22R, 22G, and 22B serving as an electro-optical device and a light modulation device, a projection optical system 23, a light valve driving unit 24, and the like. It is configured. The image projection unit 17 modulates the light emitted from the light source 21 with the liquid crystal light valves 22R, 22G, and 22B to form image light, and the image light from the projection optical system 23 including at least one of a lens and a mirror. Projecting and displaying an image on the projection surface Sp.

  The light source 21 includes a discharge type light source lamp such as an ultra-high pressure mercury lamp or a metal halide lamp, or a solid light source such as a light emitting diode or a semiconductor laser. Light emitted from the light source 21 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue which are the three primary colors of light by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 22R, 22G, 22B, respectively.

  The liquid crystal light valves 22R, 22G, and 22B are each configured by a transmissive liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. Each liquid crystal panel is formed with a rectangular pixel region 22i composed of a plurality of pixels arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel.

  The light valve driving unit 24 forms an image in the pixel region 22i of the liquid crystal light valves 22R, 22G, and 22B. Specifically, the light valve driving unit 24 applies a driving voltage corresponding to the image information input from the image information processing unit 16 to each pixel of the pixel region 22i, and transmits each pixel according to the image information. Set to rate. The light emitted from the light source 21 is modulated for each pixel by passing through the pixel regions 22i of the liquid crystal light valves 22R, 22G, and 22B, and image light corresponding to image information is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to form image light representing a color image, and is enlarged and projected onto the projection plane Sp by the projection optical system 23. As a result, an image based on the image information is displayed on the projection surface Sp.

  Returning to FIG. 2, the control unit 10 includes a QR code generation unit 18 and a QR code analysis unit 19 as functional blocks realized by the control program.

  The QR code generating unit 18 encodes information to be transmitted to other projectors 1 such as the identification information 31 and generates a QR code 200 as an identification image. Specifically, the QR code generation unit 18 generates image information (hereinafter also referred to as “identification image information”) for displaying the QR code 200 as an OSD image, and the generated identification image information is subjected to image information processing. To the unit 16. When the image information processing unit 16 performs a process of superimposing the identification image information on the input image information, the QR code 200 is projected from the image projection unit 17.

  The QR code analysis unit 19 detects a QR code 200 projected by another projector 1 from the captured image generated by the imaging unit 14, decodes the QR code 200, and acquires information stored in the QR code 200. .

Next, the operation of the image projection system 100 will be described.
In the image projection system 100 of the present embodiment, each projector 1 projects the QR code 200 in which the identification information 31 and the like are stored, and also images each QR code 200 projected by the other projector 1. It is possible to automatically determine in which arrangement pattern the partial images Pd are arranged and which projector 1 projects the partial image Pd at which position.

  FIG. 4 is a flowchart showing the operation of the projector 1 when automatically determining the arrangement of the partial images Pd. When the user performs an operation for instructing automatic array determination using the remote controller 2, the operation signal transmitted from the remote controller 2 is received by the remote control signal receiver 13 of each projector 1. And the control part 10 of each projector 1 operate | moves according to the flow shown in FIG.

  In order to simplify the description, it is assumed in the present embodiment that up to three partial images Pd can be arranged. That is, the maximum number of projectors 1 that contribute to multi-projection is three. Further, as shown in FIG. 1, in the present embodiment, three partial images Pd are arranged side by side. Among these, the left partial image Pd is projected by the projector 1a toward the projection plane Sp, and the center is displayed. The partial image Pd is projected by the projector 1b, and the right partial image Pd is projected by the projector 1c. Further, it is assumed that the identification information 31 of the projector 1a is set to “101”, the identification information 31 of the projector 1b is set to “102”, and the identification information 31 of the projector 1c is set to “103”.

  As shown in FIG. 4, in step S101, the control unit 10 encodes the identification information 31 and the data table 32 stored in its storage unit 11 by the QR code generation unit 18, and stores these information. One generated QR code 200 is generated.

FIG. 5 is an explanatory diagram for explaining the data table 32. As an example, the data table 32 stored in the storage unit 11 of the projector 1b is shown.
As shown in FIG. 5, the data table 32 is a data group used for automatically determining the arrangement of the partial images Pd, and includes three data strings L1, L2, and L3 that are the same number as the maximum number of the projectors 1. It is configured. Each projector 1 detects the QR code 200 projected by another projector 1 from the captured image generated by the imaging unit 14 and stores the detection result in the data table 32. The first data string L1 is a data string for storing its own detection results, and the second data string L2 and the third data string L3 are data strings for storing the detection results of the other projectors 1. .

  Each data string can store five data of the first item C1 to the fifth item C5, and the identification information 31 of the projector 1 that performs detection is stored in the first item C1. Therefore, the identification information 31 (“102” in this example) is stored in the first item C1 of the first data string L1. Since the identification information 31 of the other projectors 1 has not been acquired in the initial state before the automatic array determination, the first item C1 of the second data string L2 and the third data string L3 is blank (in the drawing, "-".) Hereinafter, the partial image Pd projected by the projector 1 set in the first item C1 of each data string is also referred to as “reference image Pd”.

  The second item C2 of each data string stores the identification information 31 of the projector 1 that projects the partial image Pd on the upper side of the reference image Pd. The third item C3 stores the partial image Pd on the right side of the reference image Pd. The identification information 31 of the projector 1 to project is stored. Similarly, the identification information 31 of the projector 1 that projects the partial image Pd below the reference image Pd is stored in the fourth item C4, and the partial image Pd is stored on the left side of the reference image Pd in the fifth item C5. The identification information 31 of the projector 1 to project is stored. In the initial state, the second item C2 to the fifth item C5 are all blank.

  Returning to FIG. 4, in step S <b> 102, the control unit 10 displays the QR code 200 generated by the QR code generation unit 18 on the projection plane Sp. Specifically, the control unit 10 outputs image information representing a white and plain image (an all-white image) to the image information input unit 15 and also outputs the image information of the generated QR code 200 to the image information processing unit 16. Output to. As a result, the QR code 200 is projected from the image projection unit 17 by the image information processing unit 16 superimposing the QR code 200 on the all white image as an OSD image. At this time, the control unit 10 instructs the image information processing unit 16 to place the QR code 200 on the peripheral portion of the partial image Pd.

  FIG. 6 is an explanatory diagram for explaining a position where the QR code 200 is displayed. In FIG. 6, the reference image Pd projected by the projector 1 is indicated by a solid line, and the partial images Pd projected so as to be adjacent to the upper and lower sides and the left and right of the reference image Pd are indicated by broken lines.

  As shown in FIG. 6, the projector 1 is a peripheral portion of the partial image Pd (reference image Pd) projected by itself, and the other projector 1 projects the partial image Pd on the upper, lower, left, and right sides of the reference image Pd. The QR code 200 is displayed in the area to be the overlapping area Ao. Specifically, the projector 1 can be superimposed on the other two partial images Pd from a region that can be superimposed only on the reference image Pd and the other partial image Pd, that is, a frame-shaped region that can be the superimposed region Ao. One QR code 200 is displayed in an area excluding the corner area Aw. That is, the projector 1 includes the first area A1 that can be superimposed only on the upper partial image Pd of the reference image Pd, the second area A2 that can be superimposed only on the right partial image Pd of the reference image Pd, and the reference image Pd. The QR code 200 is displayed in either the third region A3 that can be superimposed only on the lower partial image Pd or the fourth region A4 that can be superimposed only on the left partial image Pd of the reference image Pd.

  More specifically, the control unit 10 of the projector 1 sets two display positions along the outer edge of the reference image Pd in each of the first area A1, the second area A2, the third area A3, and the fourth area A4. Set. Display positions P1 and P2 are set in order from the left in the first area A1, display positions P3 and P4 are set in order from the top in the second area A2, and display positions in order from the right in the third area A3. P5 and P6 are set, and display positions P7 and P8 are set in order from the bottom in the fourth area A4. Then, the control unit 10 displays the QR code 200 at any one of the eight display positions P1 to P8 in total, and thereafter, the display position of the QR code 200 is rotated clockwise as time passes. Change cyclically.

  Returning to FIG. 4, in step S <b> 103, the control unit 10 instructs the imaging unit 14 to image the projection plane Sp. In step S <b> 104, based on the captured image generated by the imaging unit 14, the control unit 10 includes a QR other than the QR code 200 projected by itself within the first area A <b> 1 to the fourth area A <b> 4 of the reference image Pd. It is determined whether or not the QR code 200 of the projector 1 that projects the partial image Pd exists at a position adjacent to the code 200, that is, one of the upper, lower, left, and right sides of the reference image Pd. When the QR code 200 of the other projector 1 is not detected, the control unit 10 moves the process to step S105, and when the QR code 200 of the other projector 1 is detected, the process proceeds to step S107. Transfer.

  When the process proceeds to step S105 without detecting another QR code 200, the control unit 10 displays a predetermined unit time (for example, 1 second) after displaying the QR code 200 at the current display position. Judge whether or not it has passed. And the control part 10 moves a process to step S106, when unit time passes. On the other hand, if the unit time has not elapsed, the control unit 10 returns the process to step S103, and repeats the imaging of the projection plane Sp and the detection of the QR code 200.

  When the unit time has elapsed after the QR code 200 is displayed at the current display position and the process proceeds to step S106, the control unit 10 changes the display position of the QR code 200 to the next position. That is, the control unit 10 instructs the image information processing unit 16 to superimpose the QR code 200 on the next display position in the order, and returns the process to step S102. As a result, next time, the QR code 200 is arranged at a new display position.

  When the QR code 200 projected by another projector 1 is detected in step S104 and the process proceeds to step S107, the control unit 10 decodes the detected QR code 200 by the QR code analysis unit 19. , The information stored in the QR code 200, that is, the identification information 31 and the data table 32 of the other projector 1 are acquired.

  In step S108, the control unit 10 updates the data table 32 stored in its own storage unit 11 based on the detected QR code 200. For example, the control unit 10 determines the relative position of the partial image Pd of the projector 1 that projects the QR code 200 with respect to the reference image Pd based on the position of the QR code 200 in the captured image. In other words, based on whether the QR code 200 is detected in any of the first area A1 to the fourth area A4, the control unit 10 determines whether the projector 1 that projects the QR code 200 is up, down, left, or right of the reference image Pd. It is determined whether the partial image Pd is being projected. Then, in the first data string L1 of the own data table 32, the identification information 31 acquired from the QR code 200 is stored in the corresponding item among the second item C2 to the fifth item C5. For example, when the QR code 200 is detected in the first region A1 located above the reference image Pd, the control unit 10 stores the identification information 31 in the second item C2 corresponding to “up”.

  In addition, the control unit 10 copies the contents of the first data string L1 of the data table 32 acquired from the QR code 200 to the second data string L2 or the third data string L3 of its own data table 32. Furthermore, when the identification information 31 other than itself is stored in the first item C1 of the second data string L2 or the third data string L3 of the acquired data table 32, the control unit 10 stores the data string itself The data table 32 is copied to the second data string L2 or the third data string L3.

  In step S109, the control unit 10 determines whether or not the own data table 32 has changed before and after the update. Then, when there is a change in the data table 32, that is, when new information is added to the data table 32, the control unit 10 moves the process to step S110. On the other hand, when new information is not added and there is no change in the data table 32 before and after the update, the control unit 10 moves the process to step S113.

  When there is a change in the data table 32 and the process proceeds to step S110, the control unit 10 updates the QR code 200 based on the updated data table 32. That is, the control unit 10 encodes the data table 32 updated in step S108 by the QR code generation unit 18, and generates the QR code 200 to be displayed next time.

  In step S111, the control unit 10 determines whether or not a unit time has elapsed since the QR code 200 was displayed at the current display position. Then, the control unit 10 moves the process to step S112 when the unit time has elapsed, and repeats step S111 when the unit time has not elapsed.

  When the unit time has elapsed after the QR code 200 is displayed at the current display position and the process proceeds to step S112, the control unit 10 sets the display position of the QR code 200 to the next position as in step S106. And the process returns to step S102.

  If there is no change in the data table 32 before and after the update in step S109 and the process proceeds to step S113, the control unit 10 determines that the data table 32 remains unchanged for a first predetermined period (for example, the display position is changed). It is determined whether or not it has continued). Then, when the state in which the data table 32 has not changed continues for the first predetermined period, the control unit 10 determines that the data table 32 has been determined and moves the process to step S114. Thereafter, the control unit 10 does not update the data table 32 or the QR code 200, but only displays the QR code 200 while changing the display position every unit time. On the other hand, the control part 10 transfers a process to step S111, when the state with no change in the data table 32 is not continuing for the 1st predetermined period.

  When the data table 32 is confirmed and the process proceeds to step S114, the control unit 10 determines whether or not a unit time has elapsed since the QR code 200 was displayed at the current display position. And the control part 10 transfers a process to step S115, when unit time has passed, and repeats step S114, when unit time has not passed.

  When the unit time has elapsed after the QR code 200 is displayed at the current display position and the process proceeds to step S115, the control unit 10 sets the display position of the QR code 200 to the next position as in step S106. Change to In step S116, the control unit 10 instructs the image information processing unit 16 to display the QR code 200 at a new display position.

  In step S117, the control unit 10 determines whether or not a second predetermined period (for example, a period in which the display position goes around) has elapsed since the data table 32 is determined. Then, the control unit 10 ends the flow when the second predetermined period has elapsed, and returns to step S114 when the second predetermined period has not elapsed.

  When the data table 32 is completed by the above-described flow, the control unit 10 of each projector 1 projects the partial image Pd at which position and which projector 1 arranges the partial images Pd in what arrangement pattern. It becomes possible to recognize whether there is.

  Next, a specific example when the projectors 1a, 1b, and 1c shown in FIG. 1 operate according to the flowchart shown in FIG. 4 will be described.

7A to 7C are tables showing the transition of the update of the data table 32 of each projector 1a, 1b, 1c.
The numerical value at the left end in the table is a serial number assigned to a period in which the QR code 200 is displayed at one display position, and the display positions P1 to P8 of the QR code 200 in that period are shown on the right side. . In this example, all the projectors 1a, 1b, and 1c display the QR code 200 at the display position P1 on the left side of the first area A1 with the start of automatic array determination, and then P2 and P3 clockwise. ,..., P8, the display position is changed, and then the display position P1 is returned to the display position P1 and the display position is changed in the same order. In the following, a period in which the serial number is n (n is a positive integer) is also referred to as “nth period”.

  As shown in FIG. 7A, in the first period immediately after the automatic array determination is started, each projector 1 displays the QR code 200 at the display position P1. At this time, the data table 32 of each projector 1 remains in the initial state, and other items are blank except that the identification information 31 is stored in the first item C1 of the first data string L1. Yes. After this, including the first period and the second period, the QR code 200 is displayed in either the first area A1 (display positions P1, P2) or the third area A3 (display positions P5, P6). During this period, the displayed QR code 200 is not detected from other projectors 1.

  In the third period, each projector 1 displays the QR code 200 at the display position P3 in the second area A2. At this time, the projector 1b detects the QR code 200 of the projector 1a in the fourth area A4 on the left side. For this reason, the projector 1b stores “101”, which is the identification information 31 of the projector 1a, in the fifth item C5 corresponding to the left side of the first data string L1, and also stores the data table 32 acquired from the QR code 200. The first data string L1 is copied to the second data string L2 of its own data table 32.

  Similarly, in the third period, the projector 1c detects the QR code 200 of the projector 1b in the fourth area A4 on the left side. For this reason, the projector 1c stores “102”, which is the identification information 31 of the projector 1b, in the fifth item C5 corresponding to the left side of the first data string L1, and also includes the data table 32 acquired from the QR code 200. The first data string L1 is copied to the second data string L2 of its own data table 32.

  In the fourth period, each projector 1 displays the QR code 200 at the display position P4 in the second area A2. The projector 1b continues to detect the QR code 200 of the projector 1a, but the data table 32 does not change because the QR code 200 of the projector 1a has not been updated. On the other hand, the projector 1c detects the QR code 200 of the projector 1b updated in the third period. Then, the projector 1c copies the first data row L1 of the data table 32 of the projector 1b to the second data row L2 of its own data table 32 and adds it to the data table 32 of the projector 1b in the third period. The second data string L2 related to the projector 1a thus copied is copied to the third data string L3 of its own data table 32.

  In the seventh period, each projector 1 displays the QR code 200 at the display position P7 in the fourth area A4. At this time, the projector 1a detects the QR code 200 of the projector 1b in the second area A2 on the right side. For this reason, the projector 1a stores “102”, which is the identification information 31 of the projector 1b, in the third item C3 corresponding to the right side of the first data string L1, and also stores the data table 32 acquired from the QR code 200. The first data string L1 is copied to the second data string L2 of its own data table 32.

  Similarly, in the seventh period, the projector 1b detects the QR code 200 of the projector 1c in the second area A2 on the right side. For this reason, the projector 1b stores “103”, which is the identification information 31 of the projector 1c, in the third item C3 corresponding to the right side of the first data string L1, and also includes the data table 32 acquired from the QR code 200. The first data string L1 is copied to the third data string L3 of its own data table 32.

  In the eighth period, each projector 1 displays the QR code 200 at the display position P8 in the fourth area A4. The projector 1a detects the QR code 200 of the projector 1b updated in the seventh period. Then, the projector 1a copies the first data row L1 of the data table 32 of the projector 1b to the second data row L2 of its own data table 32, and adds it to the data table 32 of the projector 1b in the seventh period. The third data string L3 related to the projector 1c thus copied is copied to the third data string L3 of its own data table 32. On the other hand, the projector 1b continues to detect the QR code 200 of the projector 1c, but the data table 32 does not change because the QR code 200 of the projector 1c has not been updated.

  As shown in FIG. 7B, in the eleventh period, each projector 1 displays the QR code 200 at the display position P3 in the second area A2. At this time, the projector 1b detects the QR code 200 of the projector 1a, and copies the first data string L1 of the data table 32 acquired from the QR code 200 to the second data string L2 of its own data table 32.

  Similarly, in the eleventh period, the projector 1c detects the QR code 200 of the projector 1b, and uses the first data string L1 of the data table 32 acquired from the QR code 200 as the second data string of its own data table 32. Copy to L2.

  In the twelfth period, each projector 1 displays the QR code 200 at the display position P4 in the second area A2. The projector 1b continues to detect the QR code 200 of the projector 1a, but the data table 32 does not change because the QR code 200 of the projector 1a has not been updated. On the other hand, the projector 1c detects the QR code 200 of the projector 1b updated in the eleventh period. Then, the second data row L2 related to the projector 1a updated in the data table 32 of the projector 1b in the eleventh period is copied to the third data row L3 of the own data table 32.

  In the fifteenth period and the sixteenth period, the projector 1a detects the QR code 200 of the projector 1b, and the projector 1b detects the QR code 200 of the projector 1c, but none of the QR codes 200 is updated. Therefore, the data table 32 does not change. Further, in the sixteenth period, the data table 32 of the projector 1a does not change from the update in the eighth period until the display position makes a round. For this reason, the projector 1a determines that the data table 32 has been confirmed, and thereafter does not detect the QR code 200 of the other projector 1.

  Similarly, as shown in FIG. 7C, in the nineteenth period, the projector 1b detects the QR code 200 of the projector 1a, and the projector 1c detects the QR code 200 of the projector 1b. Is not updated, the data table 32 does not change. In addition, the data table 32 of the projector 1b has not changed from when it is updated in the eleventh period until the display position is completed. For this reason, the projector 1b determines that the data table 32 has been confirmed, and thereafter does not detect the QR code 200 of the other projector 1.

  In the twentieth period, the projector 1c detects the QR code 200 of the projector 1b, but the data table 32 does not change because the QR code 200 is not updated. In addition, the data table 32 of the projector 1c does not change from when it is updated in the twelfth period until the display position is completed. For this reason, the projector 1c determines that the data table 32 has been determined, and thereafter does not detect the QR code 200 of the other projector 1.

  In the twenty-fourth period, the projector 1a ends the display of the QR code 200 because the display position has made a round after the data table 32 is determined. Similarly, although not shown, the projector 1b ends the display of the QR code 200 in the 27th period, and the projector 1c ends the display of the QR code 200 in the 28th period.

  With the above operation, the data table 32 of each projector 1 is completed. The contents of the data tables 32 are the same although the data strings are exchanged. That is, all the projectors 1 share common information regarding the arrangement of the partial images Pd. Each projector 1 recognizes the number of partial images Pd constituting the projection image Pa (the number of projectors 1) and the arrangement pattern based on the completed data table 32, and positions of the partial images Pd in the arrangement pattern. Recognize Then, the projector 1 determines whether it corresponds to the master projector, the relay projector, or the end projector based on the recognized position.

  The master projector is one projector 1 that supervises the operation of the image projection system 100, and thereafter, when information is transmitted between the projectors 1, a projector 1 other than the master projector (hereinafter also referred to as “slave projector”). )) And processing to aggregate information from slave projectors. Among the slave projectors, the slave projector that is not adjacent to the master projector and the projector 1 that relays information between the master projector are relay projectors, and the other slave projectors are end projectors.

  Which projector 1 plays which role and through which route information is transmitted is predetermined by the control program for each of various arrangement patterns. In the present embodiment, when one projector 1 that projects the partial image Pd at the center of the projection image Pa is set as the master projector, and the center of the projection image Pa is the overlap area Ao, the overlap area One of the plurality of projectors 1 sharing Ao is set to be the master projector.

  For this reason, as shown in FIG. 1, in the arrangement pattern in which the three projectors 1 project the partial image Pd in a horizontal row, the projector 1b that projects the partial image Pd in the center serves as a master projector, and the partial images Pd on both sides. Projectors 1a and 1c for projecting are end projectors. In this example, since the partial images Pd of all the end projectors are adjacent to the partial image Pd of the master projector, there is no relay projector.

FIG. 8 is an explanatory diagram for explaining an example in which the partial images Pd are arranged in another arrangement pattern.
As shown in FIG. 8, in this example, the image projection system 100 includes six projectors 1, and the partial images Pd are arranged in a 3 × 2 matrix. Here, it is assumed that the three partial images Pd arranged on the upper side are Pd1, Pd2, and Pd3 in order from the left, and the projector 1 that projects them is 1d, 1e, and 1f. Further, the three partial images Pd arranged on the lower side are Pd4, Pd5, and Pd6 in order from the left, and the projectors 1 that project the respective partial images Pd are 1g, 1h, and 1i.

  In this arrangement pattern, the projector 1e that projects the upper partial image Pd2 among the two projectors 1e and 1h that projects the partial images Pd2 and Pd5 at the center is set to be the master projector. The projectors 1d and 1f that project the partial images Pd1 and Pd3 on both sides of the partial image Pd2 of the master projector are relay projectors, and the projectors 1g, 1h, and 1i that project the partial images Pd4, Pd5, and Pd6 on the lower side. Become an end projector. Each projector 1 recognizes its role based on the generated data table 32.

  When information is transmitted between the projectors 1, the projector 1 that projects the partial image Pd at a position adjacent to the partial image Pd2 of the master projector (projector 1e) either vertically or horizontally transmits and receives information directly with the master projector. I do. That is, the end projector (projector 1h) that projects the partial image Pd5 below the partial image Pd2, and the relay projectors (projectors 1d and 1f) that project the partial images Pd1 and Pd3 to the left and right of the partial image Pd2 are the master projector (projector). 1e) and send / receive information directly. On the other hand, the end projectors (projectors 1g and 1i) that project the partial images Pd4 and Pd6 at positions that are not adjacent to the partial image Pd2 of the master projector are relay projectors that project the partial images Pd1 and Pd3 at positions adjacent to the upper side thereof. Information is transmitted to and received from the master projector via the projectors 1d and 1f.

Here, an operation when the image projection system 100 corrects variations in color and brightness of the partial image Pd for each projector 1 will be described.
9A to 9D are explanatory diagrams for explaining the correction processing. Note that the image projection system 100 projects the partial image Pd in a 3 × 2 matrix arrangement by the six projectors 1 as illustrated in FIG. 8, but in FIGS. 9A to 9D, the description is given. In order to facilitate understanding, each partial image Pd is displayed separately.

  When the execution of the correction process is instructed by the user, each projector 1 measures the color and brightness of the image that it projects. Specifically, each projector 1 projects one or more predetermined measurement images, the projected measurement image is captured by the imaging unit 14, and the color of the captured measurement image and Measure brightness. Each projector 1 generates measurement information corresponding to each measurement result. As the measurement image, for example, a plain image having a predetermined color and a predetermined brightness is used.

  As shown in FIG. 9A, the end projector (projectors 1g, 1h, 1i) associates identification information 31 with the generated measurement information and encodes it to generate a QR code 201. Then, the generated QR code 201 is displayed in the overlapping area Ao with the master projector or relay projector that is the information transmission destination. In the correction processing, the display position of the QR code 201 is determined in advance for each of the first area A1 to the fourth area A4 (see FIG. 6), and the projector 1 may be, for example, the first area A1. For example, the QR code 201 is displayed at the display position P2, the display position P4 if the second area A2, the display position P6 if the third area A3, and the display position P8 if the fourth area A4. In this example, all end projectors display the QR code 201 at the display position P2 in the first area A1 in order to transmit information to the projector 1 that projects the partial image Pd above the partial image Pd thereof.

  The relay projectors (projectors 1d and 1f) capture the QR code 201 projected by the end projectors (projectors 1g and 1i), and acquire measurement information of the end projector stored in the QR code 201. Furthermore, as shown in FIG. 9B, the relay projector associates the identification information 31 with each of the acquired measurement information and its own measurement information, encodes them together, and stores the measurement information of both. A QR code 202 is generated. Then, the generated QR code 202 is displayed in the overlapping area Ao with the master projector. The display position of the QR code 202 is one of the display positions P2, P4, P6, and P8 as described above. That is, the relay projector (projector 1d) that projects the partial image Pd on the left side of the partial image Pd of the master projector displays the QR code 202 at the display position P4 in the second area A2, and on the right side of the partial image Pd of the master projector. The relay projector (projector 1f) that projects the partial image Pd displays the QR code 202 at the display position P8 in the fourth area A4.

  The master projector (projector 1e) images the QR codes 201 and 202 displayed in the overlapping area Ao by the end projector and the relay projector, and acquires the measurement information stored in the QR codes 201 and 202. Thereby, the measurement information of all the slave projectors is collected in the master projector. Based on the acquired measurement information and its own measurement information, the master projector determines correction parameters for each projector 1 in order to correct images so that the colors and brightness of all the projectors 1 are uniform. The correction parameter corresponds to correction information. Then, as shown in FIG. 9C, the master projector associates the identification information 31 of the projector 1 with all the determined correction parameters, encodes these correction parameters together, generates a QR code 203, Display on Ao. The display position of the QR code 203 is any one or a plurality of display positions P2, P4, P6, and P8. In this example, the master projector transmits the generated QR code 203 to the display position P4 of the second area A2 and the third area A3 in order to transmit the correction parameters to the three paths on the right side, the lower side, and the left side. Displayed simultaneously at the display position P6 and the display position P8 of the fourth area A4.

  The relay projector captures and decodes the QR code 203 displayed by the master projector, and projects a partial image Pd at a position adjacent to its own correction parameter from among a plurality of correction parameters stored in the QR code 203. Get the correction parameters of the end projector to be used. Then, as illustrated in FIG. 9D, the relay projector encodes the acquired correction parameters of the end projector to generate a QR code 204, and displays the QR code 204 in the overlapping area Ao with the transmission destination end projector. The QR code 204 is displayed at any one of the display positions P2, P4, P6, and P8 as described above. In this example, all the relay projectors (projectors 1d and 1f) transmit information to the end projectors (projectors 1g and 1i) that project the partial image Pd on the lower side, so that QR is displayed at the display position P6 in the third area A3. The code 204 is displayed.

  The end projector captures and decodes the QR codes 203 and 204 displayed by the master projector or the relay projector, and acquires its correction parameters stored in the QR codes 203 and 204.

  Each projector 1 stores the generated or acquired correction parameter in the storage unit 11. Thereafter, when projecting an image, the control unit 10 of each projector 1 outputs a correction parameter to the image information processing unit 16, and performs correction processing according to the correction parameter for the input image information. Is executed. As a result, the projection image Pa is displayed in a state where variations in color and brightness of the partial image Pd for each projector 1 are reduced.

  Note that the end projector and the relay projector delete the displayed QR codes 201 and 202 when the QR codes 203 and 204 representing the correction parameters are detected after displaying the QR codes 201 and 202 representing the measurement information. In addition, the master projector and the relay projector display the QR codes 203 and 204 representing the correction parameters, and then display the QR codes 201 and 202 displayed by the transmission destination projector 1 in response to the deletion. The QR codes 203 and 204 that have been deleted are deleted. However, the timing at which the QR codes 201 to 204 are deleted is not limited to the above. Each projector 1 is configured after a predetermined time period sufficient for the transmission destination projector 1 to detect the QR codes 201 to 204 has elapsed. In this case, the QR codes 201 to 204 may be deleted.

  10 to 12 are flowcharts for explaining the operation of the projector 1 when executing the above-described correction processing, and FIG. 10 shows the operation of the end projector. When the user performs an operation for instructing execution of correction processing using the remote controller 2, the operation signal transmitted from the remote controller 2 is received by the remote control signal receiver 13 of each projector 1. Among these, the control unit 10 of the end projector operates according to the flow shown in FIG.

  As shown in FIG. 10, when the execution of the correction process is instructed, the control unit 10 of the end projector outputs image information of a predetermined measurement image set in advance to the image information input unit 15, and the image projection unit The image for measurement is projected from 17 and the image for measurement projected is imaged by the imaging unit 14. And the control part 10 measures the color and brightness of the imaged image for a measurement, produces | generates the measurement information according to a measurement result, and memorize | stores it in the memory | storage part 11 (step S121).

  Thereafter, the control unit 10 of the end projector associates the identification information 31 with the measurement information, encodes the measurement information by the QR code generation unit 18, and generates the QR code 201 (step S122). Then, the control unit 10 instructs the image information processing unit 16 to display the generated QR code 201 in the overlapping area Ao with the master projector or the relay projector (step S123).

  Thereafter, the control unit 10 of the end projector causes the imaging unit 14 to image the projection plane Sp (step S124), and the QR codes 203 and 204 are detected at positions where the QR codes 203 and 204 of the master projector or the relay projector are displayed. It is determined whether or not (step S125). When the QR codes 203 and 204 are not detected (step S125: No), the control unit 10 repeats imaging and detection until the QR codes 203 and 204 are detected.

  On the other hand, when the QR codes 203 and 204 are detected (step S125: Yes), the control unit 10 of the end projector decodes the QR codes 203 and 204 by the QR code analysis unit 19, and the QR codes 203 and 204 are detected. The own correction parameter stored in is acquired, and the acquired correction parameter is stored in the storage unit 11 (step S126).

  Thereafter, the control unit 10 of the end projector instructs the image information processing unit 16 to delete the QR code 201 displayed in step S123, and ends the flow.

  FIG. 11 is a flowchart for explaining the operation of the relay projector when executing the correction process. When the user performs an operation to instruct execution of the correction process using the remote controller 2, the control unit 10 of the relay projector operates according to the flow shown in FIG.

  As shown in FIG. 11, when the control unit 10 of the relay projector is instructed to execute the correction process, the image projection unit 17 projects the measurement image and the projected measurement image as in the end projector. The imaging unit 14 is caused to capture an image. And the control part 10 measures the color and brightness of the imaged image for a measurement, produces | generates the measurement information according to a measurement result, and memorize | stores it in the memory | storage part 11 (step S131).

  Thereafter, the control unit 10 of the relay projector causes the imaging unit 14 to image the projection plane Sp (step S132), and determines whether or not the QR code 201 is detected at a position where the QR code 201 of the end projector is displayed (step S132). Step S133). If the QR code 201 is not detected (step S133: No), the control unit 10 repeats imaging and detection until the QR code 201 is detected.

  On the other hand, when the QR code 201 is detected (step S133: Yes), the control unit 10 of the relay projector decodes the QR code 201 by the QR code analysis unit 19 and stores the end stored in the QR code 201. The projector measurement information is acquired and stored in the storage unit 11 (step S134).

  After that, the control unit 10 of the relay projector associates the identification information 31 with each of the acquired measurement information of the end projector and its own measurement information, and encodes them together to generate the QR code 202 (step S135). Then, the control unit 10 instructs the image information processing unit 16 to display the generated QR code 202 in the overlapping area Ao with the master projector (step S136).

  Thereafter, the control unit 10 of the relay projector causes the imaging unit 14 to image the projection surface Sp (step S137), and determines whether or not the QR code 203 is detected at a position where the QR code 203 of the master projector is displayed ( Step S138). If the QR code 203 is not detected (step S138: No), the control unit 10 repeats imaging and detection until the QR code 203 is detected.

  On the other hand, when the QR code 203 is detected (step S138: Yes), the control unit 10 of the relay projector decodes the QR code 203 by the QR code analysis unit 19, and a plurality of items stored in the QR code 203 are stored. Among the correction parameters, own correction parameters and correction parameters of the end projector that projects the partial image Pd at adjacent positions are acquired and stored in the storage unit 11. (Step S139).

  In response to the detection of the QR code 203 of the master projector, the control unit 10 of the relay projector instructs the image information processing unit 16 to delete the QR code 202 displayed in step S136 (step S140). .

  Further, the control unit 10 of the relay projector encodes the correction parameters of the end projector among the acquired correction parameters by the QR code generation unit 18 to generate the QR code 204 (step S141). Then, the control unit 10 instructs the image information processing unit 16 to display the generated QR code 204 in the overlapping area Ao with the end projector (step S142).

  Thereafter, the control unit 10 of the relay projector causes the imaging unit 14 to capture the projection plane Sp (step S143), and based on the captured image, whether or not the QR code 201 displayed by the destination end projector has been deleted. Is determined (step S144). Then, if the QR code 201 of the end projector has not been erased (step S144: No), the control unit 10 also continues to display its own QR code 204 until it is erased. On the other hand, if the QR code 201 of the end projector has been erased (step S144: Yes), the control unit 10 instructs the image information processing unit 16 to erase the QR code 204 displayed in step S142 ( Step S145), the flow ends.

  FIG. 12 is a flowchart for explaining the operation of the master projector when executing the correction process. When the user performs an operation to instruct execution of the correction process using the remote controller 2, the control unit 10 of the master projector operates according to the flow shown in FIG.

  As shown in FIG. 12, when the control unit 10 of the master projector is instructed to execute the correction process, the image projection unit 17 projects the measurement image and the projected measurement, as in the case of the end projector and the relay projector. The image capturing unit 14 is caused to capture an image for use. Then, the control unit 10 measures the color and brightness of the captured measurement image, generates measurement information corresponding to the measurement result, and stores the measurement information in the storage unit 11 (step S151).

  Thereafter, the control unit 10 of the master projector causes the imaging unit 14 to image the projection plane Sp (step S152), and the QR codes 201 and 202 are detected at positions where the QR codes 201 and 202 of the relay projector and the end projector are displayed. It is determined whether or not (step S153). When the QR codes 201 and 202 are not detected (step S153: No), the control unit 10 repeats imaging and detection until the QR codes 201 and 202 are detected.

  On the other hand, when the QR codes 201 and 202 are detected (step S153: Yes), the control unit 10 of the master projector decodes the QR codes 201 and 202 by the QR code analysis unit 19, and the QR codes 201 and 202 are decoded. Is acquired and stored in the storage unit 11 (step S154). Note that the measurement information acquired from the QR code 202 of the relay projector stores the measurement information of the relay projector and the measurement information of the end projector, as described above.

  The control unit 10 of the master projector determines whether or not the measurement information of all the slave projectors has been acquired (step S155). When all the measurement information has not been acquired (step S155: No), the projection plane Sp imaging, detection of QR codes 201 and 202, and acquisition of measurement information are repeated.

  On the other hand, when the measurement information of all the slave projectors has been acquired (step S155: Yes), the control unit 10 of the master projector determines all the projectors 1 based on the acquired measurement information and its own measurement information. The correction parameters for correcting the image so that the color and brightness of the projector are uniform are determined for each projector 1 (step S156).

  The control unit 10 of the master projector associates the identification information 31 of the projector 1 with all the determined correction parameters, and the QR code generation unit 18 encodes them together to generate one QR code 203 (step S157). ). Then, the control unit 10 instructs the image information processing unit 16 to display the QR code 203 in the overlapping area Ao with the projectors 1d, 1f, and 1h that are information transmission destinations (step S158).

  Thereafter, the control unit 10 of the master projector causes the imaging unit 14 to image the projection plane Sp (step S159), and determines whether or not the QR codes 201 and 202 displayed by the transmission destination projector 1 have been deleted (step S159). Step S160). Then, if the QR codes 201 and 202 of all the transmission destination projectors 1 have not been deleted (step S160: No), the control unit 10 also continues to display its own QR code 203 until they are deleted. On the other hand, if the QR codes 201 and 202 of all the transmission destination projectors 1 have been deleted (step S160: Yes), the control unit 10 instructs the image information processing unit 16 to display the QR displayed in step S158. The code 203 is deleted (step S161), and the flow ends.

  As described above, according to the image projection system 100, the projector 1, and the control method thereof according to the present embodiment, the following effects can be obtained.

  (1) According to the present embodiment, in the image projection system 100 that projects the projection image Pa by the plurality of projectors 1, the projector 1 captures the QR codes 200 to 202 projected by the other projectors 1 to form a captured image. Various information (identification information 31, data table 32, relative position, measurement information) is acquired based on the information. Then, the projector 1 generates and projects QR codes 200 to 203 based on the acquired information and the information stored in the projector 1 itself. In other words, by performing projection and imaging of the QR codes 200 to 203, it is possible to transmit information acquired by itself or information stored by itself to projectors 1 other than itself, and therefore via a network or the like. There is no need to communicate.

  (2) According to the present embodiment, the two projectors 1 that project the partial image Pd to adjacent positions generate (update) the QR code 200 based on the QR code 200 projected by the other projector 1. Therefore, both projectors 1 can generate a QR code 200 that stores information stored in the other projector 1.

  (3) According to the present embodiment, information acquired from other projectors 1 and information stored by itself can be transmitted to another projector, so that information is transmitted between three or more projectors 1. And sharing.

  (4) According to this embodiment, the projector 1 determines the relative position of the partial image Pd projected by the other projector 1 with respect to the reference image Pd, and updates the data table 32 regarding the arrangement of the partial images Pd. Since the projector 1 generates the QR code 200 based on the updated data table 32, the data table 32 updated by itself can be transmitted to projectors 1 other than itself.

  (5) According to this embodiment, the relay projector acquires measurement information corresponding to the measurement result of the end projector from the QR code 201, and based on the acquired measurement information and the measurement information corresponding to its own measurement result. Since the QR code 202 is generated, both the measurement result of the end projector and the measurement result of the relay projector can be transmitted to the master projector.

  (6) According to the present embodiment, the master projector acquires measurement information corresponding to the measurement results of the end projector and the relay projector from the QR codes 201 and 202, and corresponds to the acquired measurement information and its own measurement result. The correction parameter is determined based on the measurement information. Since the master projector generates and displays the QR code 203 storing the determined correction parameter, the correction parameter can be transmitted to the end projector and the relay projector.

  In the above embodiment, for example, when the projector 1b in FIG. 1 is the first projector, one of the projectors 1a and 1c corresponds to the second projector, and the other corresponds to the third projector. In FIG. 8, when the projectors 1d and 1f that are relay projectors are the first projectors, the projectors 1g and 1i that are end projectors correspond to the second projector, and the projector 1e that is the master projector is the third projector. It corresponds to. When the projector 1e that is a master projector is the first projector, the projectors 1d, 1f, and 1h that transmit measurement information to the master projector correspond to the second projector. In addition, the control unit 10 (including the QR code analysis unit 19) when decoding QR codes 200 to 204 and acquiring stored information corresponds to the acquisition unit. The control unit 10 (including the QR code generation unit 18) when generating the QR codes 200 to 204 corresponds to the generation unit. Further, information acquired based on the QR code 200 of the other projector 1 (data table 32, measurement information, relative position of the partial image Pd, etc. of the other projector 1) corresponds to external information, and own storage unit 11 Information (such as its own data table 32 and measurement information) stored in the information corresponds to internal information. The image projecting unit 17, the imaging unit 14, and the control unit 10 when projecting a predetermined measurement image and measuring the color and brightness of the image correspond to the measuring unit. The image information processing unit 16 when performing correction processing according to the correction parameter corresponds to the correction unit.

(Modification)
Moreover, you may change the said embodiment as follows.

  In the above embodiment, when the arrangement of the partial images Pd is automatically determined, if the QR codes 200 projected from the projectors 1 overlap, correct determination cannot be performed. For this reason, it is desirable that the QR code 200 is always displayed so as not to overlap with other QR codes 200. If the display position of the QR code 200 is changed in the same cycle (unit time) and the same order (clockwise) from the same display position as in the above embodiment, the QR codes 200 do not overlap in theory. However, the QR code 200 may overlap due to a delay in receiving the operation signal from the remote controller 2 or a variation in cycle. For this reason, by changing at least one item of the first display position of the QR code 200, the display position change order, and the display position change cycle (unit time) for each projector 1, even if they overlap in one period, another period Then, they may be displayed without overlapping. In this case, these items may be individually set by the user or may be determined at random.

  Moreover, in the aspect which made the initial display position of QR Code 200, the change period of a display position, and the change order of the display position the same in all the projectors 1 like the said embodiment, for example, some projectors 1 are up-down. In the case of being reversed, the QR code 200 is more likely to overlap between the projectors 1 that project the partial images Pd at positions adjacent to each other in the vertical direction. For this reason, the first display position is changed (for example, from the display position P1 to the display position P5) when upside down is detected by providing a means (attitude detection unit) for detecting the attitude of the projector 1. You may make it do.

  In the above embodiment, when transmitting the correction parameters, the master projector generates the QR code 203 in which the correction parameters of all the projectors 1 are stored and displays them in three display positions. It is not limited to. For example, three different QR codes 203 may be generated according to the transmission path, and each may be displayed at a corresponding display position. In this case, each QR code 203 only needs to include the correction parameter of the projector 1 on the transmission path.

  In the above embodiment, the example in which the partial images Pd of the three projectors 1 are arranged in a horizontal row and the example in which the partial images Pd of the six projectors 1 are arranged in a 3 × 2 matrix are shown. The sequence of Pd is not limited to these. When the number of projectors 1 is large, there may be a mode in which a plurality of relay projectors are interposed on a transmission path connecting the end projector and the master projector. That is, the relay projector can be disposed between the end projector and the relay projector, between the relay projector and the master projector, and between the relay projector and the relay projector, in addition to between the end projector and the master projector.

  In the above embodiment, when automatically determining the arrangement of the partial images Pd, the projector 1 displays the QR code 200 in which the identification information 31 and the data table 32 are stored. Since the identification information 31 of the projector 1 that projected the QR code 200 is stored in the first item C1 of the one data string L1, only the data table 32 may be stored in the QR code 200.

  In the above embodiment, the QR codes 200 to 204 are displayed in the overlapping area Ao where adjacent partial images Pd overlap each other. However, the imaging unit 14 can capture a sufficiently wider range than the partial image Pd of itself. If so, the QR codes 200 to 204 do not need to be within the overlapping region Ao. Moreover, when the imaging part 14 can image a sufficiently wide range, the adjacent partial images Pd do not need to be superimposed.

  In the above-described embodiment, the identification information 31 may be information set by the user so as not to be duplicated with others, but information that is preset by the projector 1 so as not to be duplicated, such as a MAC address. Such information may be used as the identification information 31.

  In the above embodiment, two display positions are set for each of the first area A1 to the fourth area A4. However, the number of display positions in each area may be one or three or more. As the number of display positions increases, the time required for the display position to go around becomes longer. However, the QR code 200 is more easily displayed without overlapping with other QR codes 200, and an error caused by dirt on the projection surface Sp or the like. Detection and the like can be avoided.

  In the above-described embodiment, the aspect in which the color and brightness of the partial image Pd are measured and corrected has been described. However, only one of the color and brightness may be corrected.

  In the above embodiment, the operation for transmitting the measurement information and the correction parameter based on the automatically determined arrangement pattern of the partial image Pd has been described. However, the operation using the determined arrangement pattern is not limited to the above. For example, in a configuration in which common image information corresponding to the entire projection image Pa is input from the image supply device 3 to all projectors 1, each projector 1 is responsible for (projects) itself from the input image information. When extracting the range, it is possible to extract an appropriate range based on the automatically determined sequence pattern.

  In the above-described embodiment, the aspect in which the master projector transmits the correction parameter to the other projector 1 has been described. However, various setting information that can be set by the user is transmitted to the other projector 1, and all the projectors 1 have the same setting information. May be shared. For example, when the user can set the position where the OSD image is superimposed, the setting of the position may be shared. When the projector 1 has an audio output function, the function is You may share settings to disable. Further, when the user can set an image to be displayed in a state where no image information is input from the image supply device 3 to the image information input unit 15, the setting of the image may be shared. In the configuration that shifts to the power saving mode when the non-input state continues for a long time, the setting of the time until shifting to the power saving mode may be shared.

  In the above-described embodiment, QR codes 200 to 204 that are matrix-type two-dimensional codes are used as identification images, but other identification images may be employed. For example, a one-dimensional barcode may be used, or a matrix type two-dimensional code other than a QR code, or a stack type two-dimensional code obtained by stacking barcodes may be used.

  In the above-described embodiment, the transmissive liquid crystal light valves 22R, 22G, and 22B are used as the light modulator. However, it is also possible to use a reflective light modulator such as a reflective liquid crystal light valve. Also, a digital mirror device that modulates the light emitted from the light source 21 can be used by controlling the emission direction of the incident light for each micromirror as a pixel. Further, the configuration is not limited to a configuration including a plurality of light modulation devices for each color light, and a configuration in which a plurality of color lights are modulated in a time division manner by one light modulation device may be employed.

  The contents derived from the embodiment will be described below.

  The control method of the image projection system is a control method of an image projection system in which an image is projected by a plurality of projectors including a first projector and a second projector, and a second identification image is obtained by the second projector. The first projector captures the second identification image to generate a first captured image, and the first projector generates a first captured image based on the generated first captured image. The first projector generates a first identification image based on the acquired first external information and the first internal information stored in the first projector. The generated first identification image is projected by the first projector.

  According to this configuration, in the image projection system that projects an image using a plurality of projectors, the first projector captures the second identification image projected by the second projector and acquires the first external information. Then, the first projector generates and projects a first identification image based on the acquired first external information and the first internal information stored in itself. In other words, by projecting and capturing an identification image, it is possible to transmit information acquired by itself or information stored by itself to projectors other than itself, so a network or the like may be used to transmit information. There is no need to communicate through the network.

  In the control method of the image projection system, the second projector captures the first identification image to generate a second captured image, and the second projector generates the second captured image. Based on the image, the second external information is acquired, and in the second projector, based on the acquired second external information and the second internal information stored in the second projector, It is desirable to update the second identification image and project the updated second identification image by the second projector.

  According to this configuration, the first projector generates a first identification image based on the second identification image projected by the second projector, and the second projector based on the first identification image. A second identification image is generated (updated). Therefore, both projectors can generate an identification image based on information stored in the other projector.

  In the control method of the image projection system, the first projector captures the updated second identification image to generate the first captured image, and the first projector includes the first projection image. It is desirable that the first identification image is updated based on the first external information acquired from the captured image, and the updated first identification image is projected by the first projector.

  According to this configuration, the second projector updates the second identification image based on the first identification image projected by the first projector, and the first projector updates the second identification image updated by the second projector. The first identification image is updated based on the second identification image. For this reason, both projectors can generate the latest identification image reflecting the update contents of the other projector.

  In the control method of the image projection system, the image projection system further includes a third projector, and the third projector captures the first identification image projected by the first projector. desirable.

  According to this configuration, the first projector can transmit information stored by itself or information acquired from the second projector to the third projector.

  In the control method of the image projection system, the first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors. In the first projector, the first imaging Based on the position of the second identification image in the image, the relative position of the image projected by the second projector with respect to the image projected by the first projector is acquired as the first external information, and the first In one projector, it is preferable that the array information is updated based on the acquired first external information, and the first identification image is generated based on the updated array information.

  According to this configuration, the first projector updates the arrangement information related to the arrangement of the images projected by the plurality of projectors based on the acquired relative position, and generates the first identification image based on the updated arrangement information. Therefore, it is possible to transmit the array information updated by itself to projectors other than itself.

  In the control method of the image projection system, the first projector measures at least one of a color and brightness of an image to be projected, and stores first measurement information according to a measurement result as the internal information, The second projector measures at least one of a color and brightness of an image to be projected, generates and projects the second identification image storing second measurement information according to a measurement result, and In the first projector, the second measurement information is acquired as the first external information, and in the first projector, based on the acquired second measurement information and the first measurement information. Thus, it is desirable to generate the first identification image.

  According to this configuration, the first projector acquires the second measurement information corresponding to the measurement result of the second projector from the second identification image, the acquired second measurement information, and its own measurement result. A first identification image is generated based on the first measurement information according to the above. For this reason, the measurement results of both the first projector and the second projector are transmitted to another projector, and information (for example, correction information) determined based on both measurement results is transmitted to the second projector. It becomes possible to do.

  In the control method of the image projection system, the first projector corrects an image projected by the second projector based on the acquired second measurement information and the first measurement information. Correction information is determined, the first identification image is generated based on the determined correction information, and the second projector captures the first identification image to acquire the correction information. It is desirable to correct the image based on the correction information.

  According to this configuration, the first projector determines correction information based on the measurement results of both the first projector and the second projector, and the second projector corrects the correction determined by the first projector. The image can be corrected based on the information.

  The image projection system is an image projection system that projects an image by a plurality of projectors including a first projector and a second projector, and the second projector projects a second identification image. A first imaging unit configured to capture the second identification image and generate a first captured image; and the first projector generated by the first imaging unit. Based on the captured image, a first acquisition unit that acquires first external information, a first storage unit that stores first internal information, and the first acquisition unit that is acquired by the first acquisition unit. Based on the external information and the first internal information stored in the first storage unit, the first generation unit that generates the first identification image and the first generation unit generate the first identification image. Projecting the first identification image A first projection portion that, characterized in that it comprises a.

  According to this configuration, in the image projection system that projects an image using a plurality of projectors, the first projector captures the second identification image projected by the second projector and acquires the first external information. Then, the first projector generates and projects a first identification image based on the acquired first external information and the first internal information stored in itself. In other words, by projecting and capturing an identification image, it is possible to transmit information acquired by itself or information stored by itself to projectors other than itself, so a network or the like may be used to transmit information. There is no need to communicate through the network.

  In the image projection system, the second projector includes a second generation unit that generates the second identification image, and a second generation unit that captures the first identification image and generates a second captured image. An imaging unit, a second acquisition unit that acquires second external information based on the second captured image, and a second storage unit that stores second internal information. The second generation unit, based on the second external information acquired by the second acquisition unit and the second internal information stored in the second storage unit, It is desirable that the identification image is updated and the second projection unit projects the updated second identification image.

  According to this configuration, the first projector generates a first identification image based on the second identification image projected by the second projector, and the second projector based on the first identification image. A second identification image is generated (updated). Therefore, both projectors can generate an identification image based on information stored in the other projector.

  In the image projection system, the first imaging unit captures the updated second identification image to generate the first captured image, and the first generation unit includes the first imaging unit. It is desirable that the first identification image is updated based on the first external information acquired from the captured image, and the first projection unit projects the updated first identification image.

  According to this configuration, the second projector updates the second identification image based on the first identification image projected by the first projector, and the first projector updates the second identification image updated by the second projector. The first identification image is updated based on the second identification image. For this reason, both projectors can generate the latest identification image reflecting the update contents of the other projector.

  The image projection system preferably further includes a third projector that captures the first identification image projected by the first projector.

  According to this configuration, the first projector can transmit information stored by itself and information acquired from the second projector to the third projector.

  In the image projection system, the first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors, and the first acquisition unit includes the first captured image in the first captured image. Based on the position of the second identification image, the relative position of the image projected by the second projector with respect to the image projected by the first projector is acquired as the first external information, and the first It is desirable that the generation unit updates the array information based on the acquired relative position, and generates the first identification image based on the updated array information.

  According to this configuration, the first projector updates the arrangement information related to the arrangement of the images projected by the plurality of projectors based on the acquired relative position, and generates the first identification image based on the updated arrangement information. Therefore, it is possible to transmit the array information updated by itself to projectors other than itself.

  In the image projection system, the first projector further includes a first measurement unit that measures at least one of color and brightness of an image projected from the first projection unit, and the second projector includes: And a second measuring unit that measures at least one of color and brightness of an image projected from the second projecting unit, and the second identification image includes a measurement result by the second measuring unit. Corresponding second measurement information is stored, and the first internal information includes first measurement information according to a measurement result by the first measurement unit, and the first acquisition is performed. The unit acquires the second measurement information as the first external information, and the first generation unit is based on the acquired second measurement information and the first measurement information. Desirably, generating the first identification image There.

  According to this configuration, the first projector acquires the second measurement information corresponding to the measurement result of the second projector from the second identification image, the acquired second measurement information, and its own measurement result. In order to generate the first identification image based on the first measurement information according to, both the measurement result of the first projector and the measurement result of the second projector are transmitted to another projector, Information (for example, correction information) determined based on both measurement results can be transmitted to the second projector.

  In the image projection system, the second projector further includes a correction unit that corrects at least one of a color and brightness of an image projected from the second projection unit, and the first generation unit includes the acquisition unit. Correction information for correcting an image projected from the second projection unit is determined based on the second measurement information and the first measurement information, and based on the determined correction information The first identification image is generated, the second acquisition unit acquires the correction information as the second external information, and the correction unit adds the correction information acquired by the second acquisition unit to the correction information. It is desirable to correct the image based on it.

  According to this configuration, the first projector determines correction information based on the measurement results of both the first projector and the second projector, and the second projector corrects the correction determined by the first projector. The image can be corrected based on the information.

  The projector is a projector provided in an image projection system that projects an image by a plurality of projectors, and captures a second identification image projected by another projector to generate a captured image, and is generated by the imaging unit. An acquisition unit that acquires external information based on the captured image, a storage unit that stores internal information, the external information acquired by the acquisition unit, and the internal information stored in the storage unit And a projection unit for projecting the first identification image generated by the generation unit. The generation unit generates a first identification image based on the above.

  According to this configuration, in an image projection system that projects an image using a plurality of projectors, the projector captures the second identification image projected by another projector and acquires external information. Then, the projector generates and projects a first identification image based on the acquired external information and the internal information stored therein. In other words, by projecting and capturing an identification image, it is possible to transmit information acquired by itself or information stored by itself to projectors other than itself, so a network or the like may be used to transmit information. There is no need to communicate through the network.

  In the projector described above, the internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors, and the acquisition unit is based on the position of the second identification image in the captured image. The relative position of the image projected by the other projector with respect to the image projected by the projector is acquired as the external information, and the generation unit obtains the arrangement information based on the relative position acquired by the acquisition unit. It is desirable to update and generate the first identification image based on the updated arrangement information.

  According to this configuration, the projector updates the arrangement information related to the arrangement of the images projected by the plurality of projectors based on the acquired relative position, and generates the first identification image based on the updated arrangement information. It becomes possible to transmit the array information updated by itself to projectors other than itself.

  The projector may further include a measurement unit that measures at least one of color and brightness of an image projected from the projection unit, and the second identification image includes the color and brightness of an image projected by the other projector. Second measurement information according to a measurement result obtained by measuring at least one of the lengths is stored, and the internal information includes first measurement information according to a measurement result by the measurement unit, The acquisition unit acquires the second measurement information as the external information, and the generation unit is configured to generate the first measurement information based on the acquired second measurement information and the first measurement information. It is desirable to generate an identification image.

  According to this configuration, the projector acquires the second measurement information according to the measurement results of the other projectors from the second identification image, and the acquired second measurement information and the first measurement information according to its own measurement result. In order to generate the first identification image based on the measurement information of one, both the measurement result of the projector and the measurement result of the other projector are transmitted to another projector, or based on the measurement results of both It is possible to transmit the determined information (for example, correction information) to the other projector.

  DESCRIPTION OF SYMBOLS 1,1a-1i ... Projector, 2 ... Remote control, 3 ... Image supply apparatus, 10 ... Control part, 11 ... Memory | storage part, 12 ... Input operation part, 13 ... Remote control signal receiving part, 14 ... Imaging part, 15 ... Image information Input unit, 16 ... image information processing unit, 17 ... image projection unit, 18 ... QR code generation unit, 19 ... QR code analysis unit, 21 ... light source, 22R, 22G, 22B ... liquid crystal light valve, 22i ... pixel region, 23 DESCRIPTION OF SYMBOLS ... Projection optical system, 24 ... Light valve drive part, 31 ... Identification information, 32 ... Data table, 100 ... Image projection system, 200-204 ... QR code, A1 ... 1st area | region, A2 ... 2nd area | region, A3 ... 1st 3 area, A4 ... 4th area, Ao ... superimposed area, C1 ... 1st item, C2 ... 2nd item, C3 ... 3rd item, C4 ... 4th item, C5 ... 5th item, L1 ... 1st data string , L2 ... second data string L3 ... third data string, P1 to P8 ... display position, Pa ... projected image, Pd, Pd1~Pd6 ... partial image, Sp ... projection surface.

Claims (17)

A control method of an image projection system for projecting an image by a plurality of projectors including a first projector and a second projector,
Projecting a second identification image by the second projector,
In the first projector, the second identification image is captured to generate a first captured image,
In the first projector, first external information is acquired based on the generated first captured image,
The first projector generates a first identification image based on the acquired first external information and the first internal information stored in the first projector,
A control method for an image projection system, wherein the generated first identification image is projected by the first projector. A control method for an image projection system according to claim 1,
In the second projector, the first identification image is captured to generate a second captured image,
The second projector acquires second external information based on the generated second captured image,
In the second projector, the second identification image is updated based on the acquired second external information and second internal information stored in the second projector,
A control method for an image projection system, wherein the second projector projects the updated second identification image by the second projector. A control method for an image projection system according to claim 2,
In the first projector, the updated second identification image is captured to generate the first captured image,
In the first projector, based on the first external information acquired from the first captured image, the first identification image is updated,
An image projection system control method, wherein the first projector projects the updated first identification image by the first projector. A control method for an image projection system according to any one of claims 1 to 3,
The image projection system further includes a third projector,
A control method for an image projection system, wherein the third projector captures the first identification image projected by the first projector. A control method for an image projection system according to any one of claims 1 to 4,
The first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors,
In the first projector, based on the position of the second identification image in the first captured image, the relative position of the image projected by the second projector with respect to the image projected by the first projector is determined. Obtaining as the first external information,
In the first projector, the array information is updated based on the acquired first external information, and the first identification image is generated based on the updated array information. Projection system control method. A control method for an image projection system according to any one of claims 1 to 4,
In the first projector, at least one of color and brightness of an image to be projected is measured, and first measurement information corresponding to a measurement result is stored as the internal information.
The second projector measures at least one of the color and brightness of an image to be projected, generates and projects the second identification image in which second measurement information corresponding to the measurement result is stored,
In the first projector, the second measurement information is acquired as the first external information,
A control method for an image projection system, characterized in that, in the first projector, the first identification image is generated based on the acquired second measurement information and the first measurement information. A control method for an image projection system according to claim 6,
In the first projector, correction information for correcting an image projected by the second projector is determined and determined based on the acquired second measurement information and the first measurement information. Generating the first identification image based on the correction information;
A control method for an image projection system, wherein the second projector captures the first identification image to acquire the correction information, and corrects the image based on the acquired correction information. An image projection system for projecting an image by a plurality of projectors including a first projector and a second projector,
The second projector includes a second projection unit that projects a second identification image,
The first projector is
A first imaging unit that captures the second identification image to generate a first captured image;
A first acquisition unit that acquires first external information based on the first captured image generated by the first imaging unit;
A first storage unit for storing first internal information;
First generating a first identification image based on the first external information acquired by the first acquisition unit and the first internal information stored in the first storage unit A generator of
A first projection unit that projects the first identification image generated by the first generation unit;
An image projection system comprising: The image projection system according to claim 8, wherein
The second projector is
A second generator for generating the second identification image;
A second imaging unit that captures the first identification image to generate a second captured image;
A second acquisition unit that acquires second external information based on the second captured image;
A second storage unit for storing second internal information,
The second generation unit is configured to generate the second external information based on the second external information acquired by the second acquisition unit and the second internal information stored in the second storage unit. 2 update the identification image,
The image projection system, wherein the second projection unit projects the updated second identification image. The image projection system according to claim 9,
The first imaging unit captures the updated second identification image to generate the first captured image,
The first generation unit updates the first identification image based on the first external information acquired from the first captured image,
The image projection system, wherein the first projection unit projects the updated first identification image. The image projection system according to any one of claims 8 to 10,
An image projection system, further comprising a third projector that captures the first identification image projected by the first projector. The image projection system according to any one of claims 8 to 11,
The first internal information includes arrangement information related to an arrangement of images projected by the plurality of projectors,
The first acquisition unit calculates a relative position of an image projected by the second projector with respect to an image projected by the first projector based on a position of the second identification image in the first captured image. , Acquired as the first external information,
The first generation unit updates the array information based on the acquired relative position, and generates the first identification image based on the updated array information. The image projection system according to any one of claims 8 to 11,
The first projector further includes a first measurement unit that measures at least one of color and brightness of an image projected from the first projection unit,
The second projector further includes a second measurement unit that measures at least one of color and brightness of an image projected from the second projection unit,
In the second identification image, second measurement information according to a measurement result by the second measurement unit is stored,
The first internal information includes first measurement information corresponding to a measurement result by the first measurement unit,
The first acquisition unit acquires the second measurement information as the first external information,
The first generation unit generates the first identification image based on the acquired second measurement information and the first measurement information. The image projection system according to claim 13,
The second projector further includes a correction unit that corrects at least one of color and brightness of an image projected from the second projection unit,
The first generation unit determines correction information for correcting an image projected from the second projection unit based on the acquired second measurement information and the first measurement information. Generating the first identification image based on the determined correction information;
The second acquisition unit acquires the correction information as the second external information,
The image projection system, wherein the correction unit corrects the image based on the correction information acquired by the second acquisition unit. A projector provided in an image projection system that projects an image by a plurality of projectors,
An imaging unit that captures a second identification image projected by another projector and generates a captured image;
An acquisition unit that acquires external information based on the captured image generated by the imaging unit;
A storage unit for storing internal information;
A generating unit that generates a first identification image based on the external information acquired by the acquiring unit and the internal information stored in the storage unit;
A projection unit that projects the first identification image generated by the generation unit;
A projector characterized by comprising: The projector according to claim 15, wherein
The internal information includes arrangement information relating to an arrangement of images projected by the plurality of projectors,
The acquisition unit acquires, as the external information, a relative position of an image projected by the other projector with respect to an image projected by the projector based on the position of the second identification image in the captured image,
The projector updates the array information based on the relative position acquired by the acquisition unit, and generates the first identification image based on the updated array information. The projector according to claim 15 or 16, wherein
A measuring unit for measuring at least one of color and brightness of an image projected from the projection unit;
In the second identification image, second measurement information corresponding to a measurement result obtained by measuring at least one of a color and brightness of an image projected by the other projector is stored.
The internal information includes first measurement information according to a measurement result by the measurement unit,
The acquisition unit acquires the second measurement information as the external information,
The generation unit generates the first identification image based on the acquired second measurement information and the first measurement information.

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