JP2019004368A - Projection apparatus, projection system, control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely control a projection device with a simple configuration. A projection device includes a projection means for projecting an image on a projection surface, a reading means for reading a mark from the projection surface, and a control means for controlling the projection means based on the shape of the mark read by the reading means. To be equipped. Then, the control means controls switching between the operating state and the hibernation state of the projection means, changing the display mode of the image displayed on the projection surface, and the like based on the shape of the mark read by the reading means. [Selection diagram] Fig. 6

Description

  The present invention relates to a projection apparatus, a projection system, a control method, and a program.

  Conventionally, a technique for remotely operating a projection apparatus with an electronic pen, a remote controller, or the like is known (see, for example, Patent Document 1).

JP 2013-84146 A

  However, in Patent Document 1, it is assumed that operation is performed using a dedicated device such as an electronic pen. For example, when projection is performed on a part of the blackboard in a class or the like, writing is performed on the blackboard. Every time and when operating the projection device, it was inconvenient because the choke and the electronic pen had to be changed. There has been a demand for remote operation of the projection apparatus with a simpler configuration without requiring such labor.

  The present invention has been made in view of such problems, and an object thereof is to enable remote operation of the projection apparatus with a simple configuration.

In order to solve the above problem, a projection apparatus according to claim 1 is provided.
Projection means for projecting an image onto a projection surface;
Reading means for reading the mark from the projection surface;
Control means for controlling the projection means based on the shape of the mark read by the reading means;
It is characterized by providing.

  According to the present invention, it is possible to remotely control the projection apparatus with a simple configuration.

It is a figure which shows the example of whole structure of the projection system of this embodiment. It is a block diagram which shows the functional structure of the projection apparatus of FIG. It is a figure which shows the example of data storage of a command mark list table. It is a block diagram which shows the functional structure of the imaging device of FIG. It is a block diagram which shows the functional structure of the terminal device of FIG. It is a flowchart which shows the projection part control process performed by CPU of FIG. It is a figure which shows the relationship between a projection surface, a projection maximum area, a command recognition maximum area, and a projection image. It is a figure for demonstrating the example of operation by the command mark for switching the operation state of a projection part / rest state. It is a figure for demonstrating the operation example by the command mark for reproducing the moving image of the projected content. It is a figure for demonstrating the example of operation by the command mark for moving a projection image. It is a figure for demonstrating the example of operation by the command mark for enlarging a projection image to a horizontal direction. It is a figure for demonstrating the example of operation by the command mark for expanding a projection image to a horizontal direction and a vertical direction. It is a figure for demonstrating the example of operation by the command mark for adjusting the brightness | luminance of a projection image. It is a figure which shows the motion of a projection image when the command which instruct | indicates the movement of the projection image drawn with white chalk is erased. It is a figure which shows the motion of a projection image when the command which instruct | indicates the movement of the projection image drawn with the red chalk is erased.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. The present invention is not limited to the illustrated example.

[Configuration of Projection System 100]
FIG. 1 is a diagram showing an example of the overall configuration of a projection system 100 according to an embodiment of the present invention. As shown in FIG. 1, the projection system 100 includes a projection device 1, an imaging device 2, a terminal device 3, and a blackboard 4 as a projection surface. For example, the projection system 100 is arranged in a classroom or a conference room, and projects content onto the blackboard 4.

The projection device 1 is a device that projects content on the blackboard 4 based on content data input from the terminal device 3.
FIG. 2 is a block diagram showing a functional configuration of the projection apparatus 1. As shown in FIG. 2, the projection apparatus 1 includes a CPU (Central Processing Unit) 11, a RAM (Random Access Memory) 12, a storage unit 13, a communication unit 14, a projection unit 15, an operation unit 16, and the like. Yes. The CPU 11 and each unit are connected by a bus.

  The CPU 11 is a processor that executes various programs stored in the storage unit 13 to perform predetermined calculations and control of each unit. The CPU 11 executes various programs stored in the storage unit 13 to perform predetermined calculations and control of each unit. For example, the CPU 11 executes a projection unit control process (see FIG. 6), which will be described later, in cooperation with a program stored in the storage unit 19, and a symbol (command mark Is written (drawn), a command corresponding to the written command mark is executed to control the projection unit 15. The CPU 11 functions as a control unit and a recognition unit.

  The RAM 12 provides a working memory space to the CPU 11 and temporarily stores data.

  The storage unit 13 is configured by a nonvolatile semiconductor memory, a hard disk, or the like. The storage unit 13 stores a system program executed by the CPU 11, various processing programs, data necessary for executing these programs, and the like.

The storage unit 13 stores a command mark list table 131, a command execution management table 132, and the like.
The command mark list table 131 is a table that stores usable command marks. As shown in FIG. 3, the command mark list table 131 stores a command ID, a command mark, and a command corresponding to the command mark in association with each other.

  The command execution management table 132 is a table for managing command execution. In the command execution management table 132, the command mark (or corresponding command) written on the blackboard 4 by the user, the coordinates at which the command mark is written (coordinates in the command recognition maximum area 42 shown in FIG. 7), and the command Is already executed, a flag indicating that it has been executed (an executed flag) is stored in association with one record.

  Here, regarding the selected command mark (command mark of command ID = 1 in FIG. 3), the position of the center coordinate is handled as being selected. For example, when embedded content is included in the projected content (see FIG. 7), whether the entire content is selected or whether the embedded content is selected is determined by the center coordinates of the command mark.

  The storage unit 13 stores content data input from the terminal device 3.

  The communication unit 14 is an interface for performing data communication with an external device such as the imaging device 2 or the terminal device 3 by wire or wireless.

  The projection unit 15 includes a display element, a light source, a light source side optical system, a projection optical system, a cooling fan, and the like. The projection unit 15 converts input content data output from the CPU 11 into video light and converts it into a wall surface or a screen (book). In the embodiment, the image of the content is projected by irradiating the blackboard 4).

  The operation unit 16 includes a plurality of switches including a power switch and outputs a user operation signal to the CPU 11.

[Configuration of Imaging Device 2]
The imaging device 2 is a device that photographs the projection surface of the blackboard 4 and transmits the obtained image data to the projection device 1.
FIG. 4 is a block diagram illustrating a functional configuration of the imaging apparatus 2. As shown in FIG. 4, the imaging device 2 includes a CPU 21, a RAM 22, a storage unit 23, an imaging unit 24, a communication unit 25, and the like. The CPU 21 and each unit are connected by a bus.

  The CPU 21 is a processor that executes various programs stored in the storage unit 23 to perform predetermined calculations and control of each unit. For example, when imaging is instructed from the projection device 1 via the communication unit 25, the CPU 21 causes the imaging unit 24 to perform imaging, and transmits the obtained captured image to the projection device 1 through the communication unit 25.

  The RAM 22 provides a working memory space to the CPU 21 and temporarily stores data.

  The storage unit 23 is configured by a nonvolatile semiconductor memory, a hard disk, or the like. The storage unit 23 stores a system program executed by the CPU 21, various processing programs, data necessary for executing these programs, and the like.

  The imaging unit 24 includes an optical lens unit, an imaging device such as an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-oxide Semiconductor), an A / D conversion circuit, and the like, and passes through the optical system. The obtained optical image is converted into a two-dimensional image signal to obtain image data (captured image). The optical lens unit of the imaging unit 24 is oriented in a direction in which the blackboard 4 can be photographed.

  The communication unit 25 is an interface for performing data communication with the projection apparatus 1 by wire or wireless.

[Configuration of Terminal Device 3]
The terminal device 3 stores content data and transmits the content data to the projection device 1. As the terminal device 3, for example, a smartphone, a tablet, a PC (Personal Computer), or the like is applicable.

  FIG. 5 is a block diagram illustrating a functional configuration of the terminal device 3. As shown in FIG. 5, the terminal device 3 includes a CPU 31, a RAM 32, a storage unit 33, an operation unit 34, a display unit 35, a communication unit 36, and the like. The CPU 31 and each unit are connected by a bus.

  The CPU 31 is a processor that executes various programs stored in the storage unit 33 to perform predetermined calculations and control of each unit. For example, the CPU 31 causes the communication unit 36 to transmit the content data selected by the operation of the operation unit 34 to the projection device 1.

  The RAM 32 provides a working memory space to the CPU 31 and temporarily stores data.

  The storage unit 33 is configured by a nonvolatile semiconductor memory, a hard disk, or the like. The storage unit 33 stores system programs executed by the CPU 31, various processing application programs, data necessary for executing these programs, and the like. The storage unit 33 stores content data of content projected by the projection apparatus 1. The content data may be either moving image data or still image data.

  The operation unit 34 includes various function keys, accepts pressing input of each key by the user, and outputs the operation information to the CPU 31. The operation unit 34 has a touch panel or the like in which transparent electrodes are arranged in a grid pattern so as to cover the surface of the display unit 35, detects various operations with fingers or a touch pen, and outputs the operation information to the CPU 31.

  The display unit 35 is configured by an LCD or the like, and performs various displays on the screen according to a display control signal from the CPU 31.

  The communication unit 36 is an interface for performing data communication with an external device such as the projection apparatus 1 by wire or wireless.

[Operation of Projection System 100]
Next, the operation of the projection system 100 will be described.
In the present embodiment, when the power switch of the projection apparatus 1 is switched to ON, power is supplied from a power source (not shown) to each unit including the light source of the projection unit 15, and the entire apparatus is in an operating state. When in the operating state, the CPU 11 transmits a power-on instruction to the imaging device 2 through the communication unit 14 to activate the imaging device 2, and executes the projection unit control process shown in FIG. In addition, when the content data is received from the terminal device 3 by the communication unit 14, the CPU 11 stores the received data in the storage unit 13, and the content (in the case of a moving image, for example, the first frame image). Is projected onto the blackboard 4 by the projection unit 15.

  FIG. 6 is a flowchart showing the projection unit control process. The projection unit control process is executed in cooperation with the CPU 11 and a program stored in the storage unit 13. Hereinafter, the projection unit control process will be described with reference to FIG.

  First, the CPU 11 transmits a photographing instruction to the imaging device 2 through the communication unit 25 and acquires a photographed image of the blackboard 4 that is a projection surface (step S1).

  Next, the CPU 11 performs a process of recognizing the command mark written on the blackboard 4 that is the projection plane based on the captured image acquired from the imaging device 2 (step S2).

  Here, FIG. 7 is a diagram showing the relationship among the blackboard 4 that is the projection plane, the projection maximum area 41, the command recognition maximum area 42, and the projection image 43. As shown in FIG. 7, the projection maximum area 41 and the command recognition maximum area 42 are set so as to be within the area of the blackboard 4. The maximum projection area 41 is a maximum area where the projection image 43 can be projected by the projection unit 15 of the projection apparatus 1. The command recognition maximum area 42 is the maximum area in which the command mark can be recognized in the projection apparatus 1 and coincides with the imaging area of the imaging apparatus 2. The command recognition maximum area 42 is set larger than the projection maximum area 41 so that the projection maximum area 41 can be covered. The projected image 43 is an image of the projected content. An embedded content area 44 may be set in the projected image 43. The size of the projection image 43 can be changed to any size within the maximum projection area 41. By default, the left half of the maximum projection area 41 is set with a margin.

In step S <b> 2, the CPU 11 first specifies an area corresponding to the projection image 43 from the captured image acquired from the imaging device 2. Next, the CPU 11 compares the image data of the region of the projection image 43 in the captured image with the content data of the projection source of the projection image 43, and extracts a difference image. Next, in a region other than the extracted difference image and the projected image 43 in the captured image, recognition processing of the command mark registered in the command mark list table 131 is performed based on the shape of the command mark, and the recognized command mark is displayed. As a command mark written on the blackboard 4 by the user, the command mark and coordinate information are acquired. The recognition process of the command mark registered in the command mark list table 131 can be performed using, for example, template matching.
A function as a reading unit that reads a command mark written on the blackboard 4 by the user is realized by the processing in steps S1 to S2.

Next, the CPU 11 determines whether or not there is a newly written command mark on the blackboard 4 based on the recognition result of the command mark in step S2 (step S3).
For example, the CPU 11 performs a process of searching the command execution management table 132 for the command mark recognized in step S2, and determines that the command mark not searched from the command execution management table 132 is a newly written command mark.

  If it is determined that a newly written command mark exists on the blackboard 4 (step S3; YES), the CPU 11 writes the newly written command mark and its coordinates in the command execution management table 132 (step S4). The process proceeds to S5. When determining that there is no newly written command mark (step S4; NO), the CPU 11 proceeds to step S5.

In step S5, the CPU 11 determines whether or not there is a command mark erased from the blackboard 4 based on the command mark recognition result in step S2 (step S5).
For example, the CPU 11 determines that a command mark stored in the command execution management table 132 and not recognized from the captured image acquired this time is a command mark erased from the blackboard 4.

  When determining that there is a command mark erased from the blackboard 4 (step S5; YES), the CPU 11 deletes the record of the command mark erased from the blackboard 4 from the command execution management table 132 (step S6), and step S7. Migrate to When determining that there is no command mark erased from the blackboard 4 (step S5; NO), the CPU 11 proceeds to step S7.

In step S7, the CPU 11 determines whether or not an unexecuted command mark exists in the command execution management table 132 (step S7). The CPU 11 determines that a command mark that is not associated with an executed flag is an unexecuted command mark.
When it is determined that an unexecuted command mark does not exist in the command execution management table 132 (step S7; NO), the CPU 11 proceeds to step S10.

When it is determined that an unexecuted command mark exists in the command execution management table 132 (step S7; YES), the CPU 11 selects a command corresponding to the unexecuted command mark stored in the command execution management table 132. By carrying out, the projection unit 15 is controlled (step S8).
That is, the CPU 11 refers to the command execution management table 132, interprets the command based on the shape of the unexecuted command mark to which the execution flag has not been assigned, executes the processing corresponding to the command, and sets the projection unit 15 Control.
Then, the CPU 11 updates the command execution management table 132 by associating the executed flag with the command mark corresponding to the executed command (step S9), and proceeds to step S10.

For example, in a state where power is supplied to the light source of the projection unit 15 (the projection unit 15 is in an operating state), as shown in FIG. 8, the operation state / pause state of the projection unit 15 is switched from the blackboard 4. When the command mark to be instructed is read, the CPU 11 stops the power supply to the light source of the projection unit 15 and switches to a state where the power is not supplied to the light source of the projection unit 15 (the projection unit 15 is in a pause state). When the projection unit 15 is in the dormant state, power is not supplied to the light source, so that the power consumption can be suppressed by switching the projection unit 15 to the dormant state when content is not projected temporarily. Further, since power is supplied to other than the light source of the projection unit 15, it is possible to return to the operating state in a shorter time than when the power switch is turned off and the entire power supply of the projection apparatus 1 is shut off. is there.
In addition, for example, when power is not supplied to the light source of the projection unit 15 (the projection unit 15 is in a dormant state), as shown in FIG. When the command mark for instructing switching is read, the CPU 11 resumes power supply to the light source of the projection unit 15 and switches the projection unit 15 to the operating state.

  Further, for example, when the projection image 43 of the first frame of the content (moving image) is projected on the blackboard 4, as shown in FIG. 9A, the selection is made from the projection image 43 of the first frame of the content. Is read, the CPU 11 causes the projection unit 15 to start reproducing the content. As shown in FIG. 9B, when a command mark for instructing menu display is read from the projected image 43 of the first frame of the content, the CPU 11 displays a list screen of selectable menus on the projection unit 15. To project. When a command mark for instructing selection is read from any menu item on the projected list screen, the CPU 11 executes processing corresponding to the selected menu.

  Further, for example, in a state where the content projection image 43 is projected on the blackboard 4, as shown in FIG. 10A, a command mark for instructing dragging from the content projection image 43, and a command mark for instructing movement. When the command mark for selecting the upper left corner is read, the CPU 11 moves the upper left corner of the dragged content to the position of the selected upper left corner, as shown in FIG. Is projected onto the projection unit 15.

  Further, for example, in a state where the content projection image 43 is projected on the blackboard 4, as shown in FIG. 11A, a command mark for instructing selection of one side of the content projection image 43, and a command for instructing movement. When a command mark that designates the position of a mark or a side is read, the CPU 11 causes the selected side of the projected content to be at the position designated by the command mark, as shown in FIG. The size of the projected image 43 of the content is enlarged (enlarged in the horizontal direction or the vertical direction) and projected onto the projection unit 15.

  Further, for example, in a state where the content projection image 43 is projected onto the blackboard 4, as shown in FIG. 12A, a command mark for instructing selection of a corner of the projection image 43 of the content projection image 43, movement When the command mark for designating the command mark and the command mark for designating the corner position are written, as shown in FIG. 12B, the CPU 11 designates the selected corner of the projected content by the command mark. The size of the projected image 43 of the content is enlarged (enlarged in the horizontal direction and the vertical direction) so as to reach the position, and is projected on the projection unit 15.

  Further, as shown in FIG. 13A, in the state where the projected image 43 of the content is projected on the blackboard 4, a command mark that instructs menu display is read from the blackboard 4 (outside the area of the projected image 43). In this case, as shown in FIG. 13B, the CPU 11 causes the projection unit 15 to project a list screen of selectable display mode adjustment menus. Here, for example, items of luminance adjustment and white balance adjustment can be selected. When a command mark for instructing selection is read from either the brightness adjustment menu item or the white balance menu item on the displayed list screen, the CPU 11 executes a process corresponding to the selected menu item. For example, when the brightness adjustment is selected, the CPU 11 projects a selection screen for selecting the brightness level onto the projection unit 15 as shown in FIG. Is read, the brightness level of the projected image 43 of the content is changed to the selected brightness level and is projected on the projection unit 15.

  When one process is performed by writing a plurality of command marks, such as in the case of movement, the CPU 11 executes a process according to the command when the last command mark is written and all are completed.

  In step S <b> 10, the CPU 11 determines whether or not the power switch of the projection apparatus 1 has been switched off. If it is determined that the power switch of the projection apparatus 1 has not been turned off (step S10; NO), the CPU 11 returns to step S1. When it is determined that the power switch of the projection apparatus 1 has been switched off (step S10; YES), the CPU 11 ends the projection unit control process.

As described above, according to the projection system 100, the CPU 11 of the projection apparatus 1 reads the command mark from the projection plane using the imaging apparatus 2, and controls the projection unit 15 based on the read command mark.
Therefore, it is possible to remotely control the projection apparatus with a simple configuration without using a dedicated device such as an electronic pen. For example, when a projection is performed on a part of the blackboard 4 in a class or the like, the chalk and the electronic pen or other remote control device are switched each time when writing on the blackboard and when operating the projection device 1. There is no need, and convenience can be improved.

  For example, the CPU 11 performs switching control between the operation state and the pause state of the projection unit 15 based on the command mark read from the projection surface. Therefore, the user can switch between the operating state and the resting state of the projection unit 15 by writing a command mark on the projection surface.

  Further, the CPU 11 controls the projection unit 15 to change the display mode of the image displayed on the projection surface based on the command mark read from the projection surface. Therefore, the user can change the display mode of the image displayed on the projection plane by writing the command mark on the projection plane. For example, it is possible to change the position, size, brightness, or white balance of the image projected on the projection plane.

  Further, the CPU 11 causes the projection device 15 to reproduce the moving image displayed on the projection plane based on the command mark read from the projection plane. Therefore, when the user writes a command mark on the projection surface, the projection device 15 can reproduce the moving image displayed on the projection surface.

  Further, the CPU 11 controls the projection unit 15 based on the shape of the command mark read from the projection plane. Therefore, it is possible to control the projection unit 15 according to the shape of the command mark.

  Further, during the operation of the projection apparatus 1, the CPU 11 performs a command mark reading process from the projection plane even when the projection unit 15 is in a resting state. Therefore, even when the projection unit 15 is in a resting state, the command mark can be read to control the projection unit 15.

  In addition, the description content in the said embodiment is a suitable example of the projection system which concerns on this invention, and is not limited to this.

  For example, in step S2, not only the shape of the command mark written on the blackboard 4 but also the color may be recognized, and the control of the projection unit 15 may be changed according to the color of the command mark. As a result, the projection unit 15 can be controlled more finely. For example, even if a command based on a command mark written with white chalk is erased, the CPU 11 keeps the executed state until the end, and a command based on a command mark written with red chalk is erased. Then cancel the executed command and restore it.

  For example, as shown in FIGS. 14A to 14C, a series of command marks (command marks for selecting the projection image 43, commands for selecting the projection image 43) that are written in white chalk and instruct to move the projection image 43. When the command mark for instructing movement and the command mark for designating the movement destination of the upper left corner are erased from the blackboard 4, the CPU 11 holds the position of the projected image 43 at the position after the movement. On the other hand, as shown in FIGS. 15 (a) to 15 (c), a series of command marks (command marks for selecting the projected image 43, commands for selecting the projected image 43) which are written in red chalk and instruct to move the projected image 43. When the command mark for instructing movement and the command mark for designating the movement destination of the upper left corner are erased from the blackboard 4, the CPU 11 returns the position of the projection image 43 to the position before the movement.

  In the above embodiment, the example in which the operation state / pause state of the projection unit 15 is switched using the command mark has been described. However, the switching control of the entire projection apparatus 1 to the pause state is also performed using the command mark. Also good. For example, when a command mark for switching the projection apparatus 1 to the dormant state is prepared and the command mark is read from the blackboard 4, the CPU 11 puts the entire projection apparatus 1 into the dormant state. Here, the resting state of the projection apparatus 1 is the same state as when the power switch of the projection apparatus 1 is switched off (a state where the power is cut off from each part of the projection apparatus 1), and the power switch is turned on. This refers to the state that cannot be recovered without switching. At this time, it is preferable to switch off the power supply of the imaging apparatus 2 at the same time.

  In the above-described embodiment, the case where the projection apparatus 1 and the imaging apparatus 2 are separate system configurations has been described as an example. However, the projection apparatus 1 may be configured to integrally include the imaging apparatus. In the above embodiment, the process of recognizing the mark from the captured image taken by the imaging device 2 is performed on the projection device 1 side. However, the recognition result is transmitted to the projection device 1 by the imaging device 2. It is good as well.

  Moreover, in the said embodiment, although demonstrated as content data being input from the terminal device 3 to the projection apparatus 1, it is not limited to this, For example, content data is memorize | stored in the memory | storage part 13 of the projection apparatus 1. FIG. Or may be input to the projection apparatus 1 from a USB (Universal Serial Bus) memory.

  In the above-described embodiment, the case where the blackboard 4 is used as a projection surface, a command mark written on the blackboard by a user is read, and the projection unit 15 is controlled based on the read command mark is described as an example. The projection surface is not limited to the blackboard. For example, it is also possible to use a whiteboard as a projection plane, read a command mark written on the whiteboard by a user with a pen, and control the projection unit 15 based on the read command mark.

  For example, in the above description, an example in which a hard disk, a semiconductor non-volatile memory, or the like is used as a computer-readable medium of the program according to the present invention is disclosed, but the present invention is not limited to this example. As another computer-readable medium, a portable recording medium such as a CD-ROM can be applied. A carrier wave is also applied as a medium for providing program data according to the present invention via a communication line.

  In addition, the detailed configuration and detailed operation of each apparatus constituting the projection system can be changed as appropriate without departing from the spirit of the invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
Projection means for projecting an image onto a projection surface;
Reading means for reading the mark from the projection surface;
Control means for controlling the projection means based on the shape of the mark read by the reading means;
A projection apparatus characterized by comprising:
<Claim 2>
The control means performs switching control between the operating state and the resting state of the projection means based on the shape of the mark read by the reading means;
The projection apparatus according to claim 1.
<Claim 3>
The control means controls the projection means to change a display mode of an image displayed on the projection plane based on a shape of a mark read by the reading means;
The projection apparatus according to claim 1, wherein:
<Claim 4>
The control means controls the projection means to change the position, size, brightness or white balance of the image projected on the projection plane based on the shape of the mark read by the reading means;
The projection apparatus according to claim 3.
<Claim 5>
The control unit causes the projection unit to reproduce the moving image displayed on the projection plane based on the shape of the mark read by the reading unit;
The projection apparatus according to claim 1, wherein:
<Claim 6>
The control means further controls the projection means based on the color of the mark read by the reading means;
The projection apparatus according to claim 1, wherein:
<Claim 7>
The reading unit performs a process of reading the mark from the projection plane even when the projection unit is in a resting state during the operation of the projection apparatus.
The projection apparatus according to claim 1, wherein:
<Claim 8>
The mark is generated on the projection plane by a user,
The projection apparatus according to claim 1, wherein
<Claim 9>
The projection plane includes a blackboard or a whiteboard, and the mark is drawn on the projection plane by a user using a chalk or a pen.
The projection apparatus according to claim 8.
<Claim 10>
A projection system comprising: a projection device comprising projection means for projecting an image on a projection surface; and an imaging device connected to the projection device,
The imaging device captures the projection plane and transmits the captured image to the projection device;
The projector is
Recognizing means for recognizing a mark from a captured image transmitted from the imaging device;
Control means for controlling the projection means based on the shape of the mark recognized by the recognition means;
A projection system characterized by comprising:
<Claim 11>
A control method for controlling projection means for projecting an image on a projection surface,
A reading step of reading the mark from the projection surface projected by the projection means;
Controlling the projection means based on the shape of the mark read in the reading step;
Control method.
<Claim 12>
A computer used in a projection apparatus including a projection unit that projects an image on a projection plane;
Reading means for reading a mark from the projection surface;
Control means for controlling the projection means based on the shape of the mark read by the reading means;
Program to function as.

100 Projection System 1 Projection Device 11 CPU
12 RAM
13 Storage Unit 131 Command Mark List Table 132 Command Execution Management Table 14 Communication Unit 15 Projection Unit 16 Operation Unit 2 Imaging Device 21 CPU
22 RAM
23 Storage Unit 24 Imaging Unit 25 Communication Unit 3 Terminal Device 31 CPU
32 RAM
34 Operation unit 35 Display unit 36 Communication unit

Claims (12)

Projection means for projecting an image onto a projection surface;
Reading means for reading the mark from the projection surface;
Control means for controlling the projection means based on the shape of the mark read by the reading means;
A projection apparatus characterized by comprising: The control means performs switching control between the operating state and the resting state of the projection means based on the shape of the mark read by the reading means;
The projection apparatus according to claim 1. The control means controls the projection means to change a display mode of an image displayed on the projection plane based on a shape of a mark read by the reading means;
The projection apparatus according to claim 1, wherein: The control means controls the projection means to change the position, size, brightness or white balance of the image projected on the projection plane based on the shape of the mark read by the reading means;
The projection apparatus according to claim 3. The control unit causes the projection unit to reproduce the moving image displayed on the projection plane based on the shape of the mark read by the reading unit;
The projection apparatus according to claim 1, wherein: The control means further controls the projection means based on the color of the mark read by the reading means;
The projection apparatus according to claim 1, wherein: The reading unit performs a process of reading the mark from the projection plane even when the projection unit is in a resting state during the operation of the projection apparatus.
The projection apparatus according to claim 1, wherein: The mark is generated on the projection plane by a user,
The projection apparatus according to claim 1, wherein The projection plane includes a blackboard or a whiteboard, and the mark is drawn on the projection plane by a user using a chalk or a pen.
The projection apparatus according to claim 8. A projection system comprising: a projection device comprising projection means for projecting an image on a projection surface; and an imaging device connected to the projection device,
The imaging device captures the projection plane and transmits the captured image to the projection device;
The projector is
Recognizing means for recognizing a mark from a captured image transmitted from the imaging device;
Control means for controlling the projection means based on the shape of the mark recognized by the recognition means;
A projection system characterized by comprising: A control method for controlling projection means for projecting an image on a projection surface,
A reading step of reading the mark from the projection surface projected by the projection means;
Controlling the projection means based on the shape of the mark read in the reading step;
Control method. A computer used in a projection apparatus including a projection unit that projects an image on a projection plane;
Reading means for reading a mark from the projection surface;
Control means for controlling the projection means based on the shape of the mark read by the reading means;
Program to function as.

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