JP6943029B2 - Projection device, projection system, control method and program - Google Patents

Description

The present invention relates to projection devices, projection systems, control methods and programs.

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

Japanese Unexamined Patent Publication No. 2013-84146

However, in Patent Document 1, it is premised that the 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. It was inconvenient because I had to change the choke and the electronic pen every time I operated the projection device. It has been required to remotely control the projection device with a simpler configuration without requiring such trouble.

The present invention has been made in view of the above problems, and an object of the present invention is to enable remote control of a projection device with a simple configuration.

In order to solve the above problems, the projection device of the invention according to claim 1 is
A projection means that projects an image on a projection surface,
A reading means for reading the mark from the projection surface and
A control means that controls the projection means based on the shape of the mark read by the reading means, and
Equipped with a,
The control means controls switching between the operating state and the hibernation state of the projection means based on the shape of the mark read by the reading means .
It is characterized by.
The projection device of the invention according to claim 3 is
A projection means that projects an image on a projection surface,
A reading means for reading the mark from the projection surface and
A control means that controls the projection means based on the shape of the mark read by the reading means, and
With
The reading means reads the mark from the projection surface even when the projection means is in a dormant state during the operation of the own device.
It is characterized by.

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

It is a figure which shows the whole configuration example 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 data storage example of the command mark list table. It is a block diagram which shows the functional structure of the image pickup apparatus of FIG. It is a block diagram which shows the functional structure of the terminal apparatus of FIG. It is a flowchart which shows the projection part control processing executed by the CPU of FIG. It is a figure which shows the relationship between the projection plane, the maximum projection area, the maximum command recognition area, and a projected image. It is a figure for demonstrating the operation example by the command mark for switching the operation state / hibernation state of a projection part. It is a figure for demonstrating the operation example by the command mark for playing a moving image of the projected content. It is a figure for demonstrating the operation example by the command mark for moving a projected image. It is a figure for demonstrating an operation example by a command mark for enlarging a projected image in a horizontal direction. It is a figure for demonstrating an operation example by a command mark for enlarging a projected image in a horizontal direction and a vertical direction. It is a figure for demonstrating the operation example by the command mark for adjusting the brightness of a projected image. It is a figure which shows the movement of the projected image when the command which instructs the movement of the projected image drawn with white choke is erased. It is a figure which shows the movement of the projected image when the command which instructs the movement of the projected image drawn with red chalk is erased.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the illustrated examples.

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

The projection device 1 is a device that projects content based on the content data input from the terminal device 3 onto the blackboard 4.
FIG. 2 is a block diagram showing a functional configuration of the projection device 1. As shown in FIG. 2, the projection device 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. There is. The CPU 11 and each part 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 each unit. The CPU 11 executes various programs stored in the storage unit 13 to perform predetermined calculations and control each unit. For example, the CPU 11 executes a projection unit control process (see FIG. 6) described later in cooperation with a program stored in the storage unit 19, and a symbol (command mark) indicating a command on the blackboard 4 by the user with chalk. When (call) 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 means and a recognition means.

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

The storage unit 13 is composed of a non-volatile semiconductor memory, a hard disk, or the like. The storage unit 13 stores system programs executed by the CPU 11, various processing programs, data necessary for executing these programs, and the like.

Further, the storage unit 13 stores the command mark list table 131, the command execution management table 132, and the like.
The command mark list table 131 is a table in which usable command marks are stored. As shown in FIG. 3, the command mark list table 131 stores the command ID, the command mark, and the 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 the corresponding command) written by the user on the blackboard 4, the coordinates where the command mark is written (the coordinates in the command recognition maximum area 42 shown in FIG. 7), and the commands thereof. If has been executed, a flag indicating that the command has been executed (executed flag) is stored in association with one record.

Here, the selected command mark (command mark with command ID = 1 in FIG. 3) is treated as if the position of its center coordinate is selected. For example, when the projected content includes embedded content (see FIG. 7), whether the entire content is selected or the embedded content is selected is determined by the center coordinates of the command mark.

Further, the storage unit 13 stores the 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 an image pickup device 2 or a terminal device 3 by wire or wirelessly.

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, and converts the input content data output from the CPU 11 into video light to convert a wall surface or a screen (book). In the embodiment, the image of the content is projected by irradiating the screen toward the blackboard 4).

The operation unit 16 is configured to include a plurality of switches including a power switch, and outputs a user's operation signal to the CPU 11.

[Configuration of imaging device 2]
The image pickup 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 showing a functional configuration of the image pickup apparatus 2. As shown in FIG. 4, the image pickup device 2 includes a CPU 21, a RAM 22, a storage unit 23, an image pickup unit 24, a communication unit 25, and the like. The CPU 21 and each part 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 each unit. For example, when the projection device 1 instructs the CPU 21 to take a picture via the communication unit 25, the CPU 21 causes the image pickup unit 24 to take a picture, and the communication unit 25 transmits the obtained picture to the projection device 1.

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

The storage unit 23 is composed of a non-volatile semiconductor memory, a hard disk, or the like. The storage unit 23 stores system programs executed by the CPU 21, various processing programs, data necessary for executing these programs, and the like.

The image pickup unit 24 is configured to include an optical lens unit, an image pickup element composed of 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 an optical system. The obtained optical image is converted into a two-dimensional image signal to acquire 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 device 1 by wire or wirelessly.

[Configuration of terminal device 3]
The terminal device 3 stores the 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 can be applied.

FIG. 5 is a block diagram showing 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 part 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 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 composed of a non-volatile 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. Further, the storage unit 33 stores the content data of the content projected by the projection device 1. The content data may be either moving image data or still image data.

The operation unit 34 includes various function keys, receives press input of each key by the user, and outputs the operation information to the CPU 31. Further, 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 by fingers, a touch pen, or the like, and outputs the operation information to the CPU 31.

The display unit 35 is composed of 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 device 1 by wire or wirelessly.

[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 device 1 is switched to ON, power is supplied from a power source (not shown) to each part including the light source of the projection unit 15, and the entire device is put into an operating state. In the operating state, the CPU 11 transmits an instruction to turn on the power to the imaging device 2 by the communication unit 14 to activate the imaging device 2 and execute the projection unit control process shown in FIG. Further, 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 stores the content (in the case of a moving image, for example, the image of the first frame). 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 collaboration with the CPU 11 and the 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 shooting instruction to the imaging device 2 by the communication unit 25 to acquire a shot image of the blackboard 4 which is a projection surface (step S1).

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

Here, FIG. 7 is a diagram showing the relationship between the blackboard 4, which is the projection surface, the maximum projection area 41, the maximum command recognition area 42, and the projected image 43. As shown in FIG. 7, the maximum projection area 41 and the maximum command recognition area 42 are set so as to fit within the area of the blackboard 4. The maximum projection area 41 is the maximum area in which the projected image 43 can be projected by the projection unit 15 of the projection device 1. The command recognition maximum area 42 is the maximum area in which the command mark can be recognized by the projection device 1, and corresponds to the photographing area of the image pickup device 2. The command recognition maximum area 42 is set to be larger than the projection maximum area 41 so as to cover the projection maximum area 41. The projected image 43 is an image of the projected content. The projected image 43 may have a built-in content area 44 set. The size of the projected image 43 can be changed to any size within the maximum projection area 41. By default, a margin is set in the left half of the maximum projection area 41.

In step S2, the CPU 11 first identifies a region corresponding to the projected 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 projected image 43 in the captured image with the content data of the projection source of the projected image 43, and extracts the difference image. Next, in the extracted difference image and the area other than the projected image 43 in the captured image, the command mark registered in the command mark list table 131 is recognized 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 command mark recognition process registered in the command mark list table 131 can be performed by using, for example, template matching or the like.
By the processing of steps S1 to S2, a function as a reading means for reading the command mark written on the blackboard 4 by the user is realized.

Next, the CPU 11 determines whether or not a newly written command mark exists 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.

When it is determined that the 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), and steps. Move to S5. If it is determined that the newly written command mark does not exist (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 recognition result of the command mark in step S2 (step S5).
For example, the CPU 11 determines that the 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 it is determined that the command mark erased from the blackboard 4 exists (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 steps S7. Move to. When it is determined that the command mark erased from the blackboard 4 does not exist (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 to which the executed flag is not associated is an unexecuted command mark.
When it is determined that the 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 issues a command corresponding to the unexecuted command mark stored in the command execution management table 132. By performing this, 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 executed flag is not given, executes the process corresponding to the command, and causes the projection unit 15 to perform the process. 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, when power is being supplied to the light source of the projection unit 15 (the projection unit 15 is in the operating state), as shown in FIG. 8, the operation state / hibernation state of the projection unit 15 can be switched from the blackboard 4. When the instructing command mark is read, the CPU 11 stops the power supply to the light source of the projection unit 15 and switches to a state in which power is not supplied to the light source of the projection unit 15 (the projection unit 15 is in a hibernation state). Since power is not supplied to the light source when the projection unit 15 is in the hibernation state, power consumption can be suppressed by switching the projection unit 15 to the hibernation state when the 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 in the state where the power switch is turned off and the entire power supply of the projection device 1 is cut off. be.
Further, for example, in the case where power is not supplied to the light source of the projection unit 15 (the projection unit 15 is in the hibernation state), as shown in FIG. 8, the operating state / hibernation state of the projection unit 15 from the blackboard 4 When the command mark instructing the switching is read, the CPU 11 restarts the power supply to the light source of the projection unit 15 and switches the projection unit 15 to the operating state.

Further, for example, in a state where the projected image 43 of the first frame of the content (moving image) is projected on the blackboard 4, as shown in FIG. 9A, it is selected from the projected image 43 of the first frame of the content. When the command mark instructing is read, the CPU 11 starts the reproduction of the content by the projection unit 15. Further, as shown in FIG. 9B, when a command mark 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. Project to. When a command mark instructing selection is read from any of the menu items on the projected list screen, the CPU 11 executes processing according to the selected menu.

Further, for example, in a state where the projected image 43 of the content is projected on the blackboard 4, as shown in FIG. 10A, a command mark for instructing drag and a command mark for instructing movement from the projected image 43 of the content. 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 selected upper left corner position as shown in FIG. 10 (b). Is projected onto the projection unit 15.

Further, for example, in a state where the projected image 43 of the content is projected on the blackboard 4, as shown in FIG. 11A, a command mark for instructing the selection of one side of the projected image 43 of the content and a command for instructing the movement. When the command mark that specifies the position of the mark and the side is read, the CPU 11 makes the selected side of the projected content come to the position specified by the command mark as shown in FIG. 11 (b). 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 projected image 43 of the content is projected on the blackboard 4, as shown in FIG. 12A, a command mark for instructing the selection of the corner of the projected image 43 of the projected image 43 of the content, and movement. When a command mark for instructing and a command mark for specifying the position of the corner are written, the CPU 11 specifies the selected corner of the projected content by the command mark as shown in FIG. 12 (b). The size of the projected image 43 of the content is enlarged (enlarged in the horizontal direction and the vertical direction) so as to come to the position, and the content is projected onto the projection unit 15.

Further, as shown in FIG. 13A, in a state where the projected image 43 of the content is projected on the blackboard 4, a command mark instructing the 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 projects the list screen of the adjustment menu of the selectable display mode on the projection unit 15. Here, for example, it is possible to select items for brightness adjustment and white balance adjustment. When the command mark instructing the selection is read from the menu item of either the brightness adjustment or the white balance on the displayed list screen, the CPU 11 executes the process according to the selected menu. For example, when the brightness adjustment is selected, the CPU 11 projects a selection screen for selecting the brightness level on the projection unit 15 as shown in FIG. 13 (c), and a command mark instructing the selection from the selection screen. Is read, the brightness level of the projected image 43 of the content is changed to the selected brightness level and projected onto the projection unit 15.

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

In step S10, the CPU 11 determines whether or not the power switch of the projection device 1 has been switched to OFF. When it is determined that the power switch of the projection device 1 has not been switched to OFF (step S10; NO), the CPU 11 returns to step S1. When it is determined that the power switch of the projection device 1 has been switched to 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 device 1 reads a command mark from the projection surface using the image pickup device 2, and controls the projection unit 15 based on the read command mark.
Therefore, it is possible to remotely control the projection device with a simple configuration without using a dedicated device such as an electronic pen. For example, when projecting onto a part of the blackboard 4 in class, etc., the chalk and the remote control device such as an electronic pen are switched between 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 controls switching between the operating state and the hibernation 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 hibernation state of the projection unit 15 by writing a command mark on the projection surface.

Further, the CPU 11 controls the projection unit 15 so as 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 surface by writing the command mark on the projection surface. For example, it is possible to change the position, size, brightness or white balance of the image projected on the projection surface.

Further, the CPU 11 causes the projection device 15 to reproduce the moving image displayed on the projection surface based on the command mark read from the projection surface. 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 surface. Therefore, it is possible to control the projection unit 15 according to the shape of the command mark.

Further, the CPU 11 performs a process of reading a command mark from the projection surface even when the projection unit 15 is in a dormant state during the operation of the projection device 1. Therefore, even when the projection unit 15 is in the hibernation state, it is possible to read the command mark and control the projection unit 15.

The description in the above embodiment is a preferable example of the projection system according to the present invention, and is not limited thereto.

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. This makes it possible to control the projection unit 15 more finely. For example, the CPU 11 executes the command based on the command mark written in white chalk until the end even if it is erased, and keeps the executed state, and the command based on the command mark written in red chalk is erased. If you cancel the executed command, return it to the original.

For example, as shown in FIGS. 14 (a) to 14 (c), a series of command marks (command marks for selecting the projected image 43, selection target) written in white chalk and instructing to move the projected image 43. When the command mark for instructing the movement and the command mark for specifying 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, selection target) written in red chalk instructing the movement of the projected image 43. When the command mark for instructing the movement and the command mark for specifying the movement destination of the upper left corner are erased from the blackboard 4, the CPU 11 returns the position of the projected image 43 to the position before the movement.

Further, in the above embodiment, an example in which the operating state / hibernation state of the projection unit 15 is switched by the command mark has been described, but the switching control of the entire projection device 1 to the hibernation state is also performed by the command mark. May be good. For example, a command mark for switching the projection device 1 to the hibernation state is prepared, and when the command mark is read from the blackboard 4, the CPU 11 puts the entire projection device 1 into the hibernation state. Here, the hibernation state of the projection device 1 is the same state as when the power switch of the projection device 1 is switched to OFF (a state in which the power is cut off from each part of the projection device 1), and the power switch is turned ON. Refers to a state in which recovery is not possible without switching. At this time, it is preferable that the power supply of the image pickup apparatus 2 is also turned off at the same time.

Further, in the above embodiment, the case where the projection device 1 and the image pickup device 2 are separate system configurations has been described as an example, but the projection device 1 may be integrally provided with the image pickup device. Further, in the above embodiment, the process of recognizing the mark from the captured image captured by the image pickup device 2 is performed on the projection device 1 side, but the process is performed by the image pickup device 2 and the recognition result is transmitted to the projection device 1. It may be that.

Further, in the above embodiment, it has been described that the content data is input to the projection device 1 from the terminal device 3, but the present invention is not limited to this, and for example, the content data is stored in the storage unit 13 of the projection device 1. It may be input to the projection device 1 from a USB (Universal Serial Bus) memory.

Further, in the above embodiment, the case where the user reads the command mark written on the blackboard with chalk using the blackboard 4 as the projection surface and controls the projection unit 15 based on the read command mark has been described as an example. , The projection surface is not limited to the blackboard. For example, the whiteboard may be used as a projection surface, the command mark written on the whiteboard by the user with a pen may be read, and the projection unit 15 may be controlled based on the read command mark.

Further, for example, in the above description, an example in which a hard disk, a non-volatile memory of a semiconductor, or the like is used as a computer-readable medium of the program according to the present invention has been 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 data of the program according to the present invention via a communication line.

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

Although some 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 the equivalent scope thereof.
The inventions described in the claims originally attached to the application of this application are added below. The claims in the appendix are as specified in the claims originally attached to the application for this application.
[Additional Notes]
<Claim 1>
A projection means that projects an image on a projection surface,
A reading means for reading the mark from the projection surface and
A control means that controls the projection means based on the shape of the mark read by the reading means, and
A projection device characterized by being provided with.
<Claim 2>
The control means controls switching between the operating state and the hibernation state of the projection means based on the shape of the mark read by the reading means.
The projection device according to claim 1.
<Claim 3>
The control means controls the projection means so as to change the display mode of the image displayed on the projection surface based on the shape of the mark read by the reading means.
The projection device according to claim 1 or 2.
<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 surface based on the shape of the mark read by the reading means.
The projection device according to claim 3.
<Claim 5>
The control means causes the projection means to reproduce a moving image displayed on the projection surface based on the shape of the mark read by the reading means.
The projection device according to any one of claims 1 to 3.
<Claim 6>
The control means further controls the projection means based on the color of the mark read by the reading means.
The projection device according to any one of claims 1 to 5.
<Claim 7>
The reading means reads the mark from the projection surface even when the projection means is in a dormant state during the operation of the projection device.
The projection device according to any one of claims 1 to 6, wherein the projection device is characterized.
<Claim 8>
The mark is generated by the user on the projection plane.
The projection device according to any one of claims 1 to 7.
<Claim 9>
The projection surface includes a blackboard or a whiteboard, and the mark is drawn by the user on the projection surface using chalk or a pen.
The projection device according to claim 8.
<Claim 10>
A projection system including a projection device including a projection means for projecting an image on a projection surface and an image pickup device connected to the projection device.
The imaging device photographs the projection surface and transmits the captured image to the projection device.
The projection device
A recognition means for recognizing a mark from a captured image transmitted from the imaging device, and
A control means that controls the projection means based on the shape of the mark recognized by the recognition means, and
A projection system characterized by being equipped with.
<Claim 11>
It is a control method for controlling a projection means for projecting an image on a projection surface.
The reading process of reading the mark from the projection surface projected by the projection means,
A step of controlling the projection means based on the shape of the mark read in the reading step, and a step of controlling the projection means.
Control methods including.
<Claim 12>
A computer used in a projection device equipped with a projection means for projecting an image on a projection surface.
A reading means for reading a mark from the projection surface,
A control means that controls the projection means based on the shape of the mark read by the reading means,
A 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 (16)

A projection means that projects an image on a projection surface,
A reading means for reading the mark from the projection surface and
A control means that controls the projection means based on the shape of the mark read by the reading means, and
Equipped with a,
The control means controls switching between the operating state and the hibernation state of the projection means based on the shape of the mark read by the reading means .
A projection device characterized by. The reading means reads the mark from the projection surface even when the projection means is in a dormant state during the operation of the projection device.
The projection device according to claim 1. A projection means that projects an image on a projection surface,
A reading means for reading the mark from the projection surface and
A control means that controls the projection means based on the shape of the mark read by the reading means, and
With
The reading means reads the mark from the projection surface even when the projection means is in a dormant state during the operation of the own device.
A projection device characterized by. The control means controls switching between the operating state and the hibernation state of the projection means based on the shape of the mark read by the reading means.
The projection device according to claim 3. The control means controls the projection means so as to change the display mode of the image displayed on the projection surface based on the shape of the mark read by the reading means.
The projection device according to any one of claims 1 to 4, wherein the projection device is characterized. The control means controls the projection means to change the position, size, brightness or white balance of the image projected on the projection surface based on the shape of the mark read by the reading means.
The projection device according to claim 5. The control means causes the projection means to reproduce a moving image displayed on the projection surface based on the shape of the mark read by the reading means.
The projection device according to any one of claims 1 to 5, wherein the projection device is characterized. The control means further controls the projection means based on the color of the mark read by the reading means.
The projection device according to any one of claims 1 to 7. The mark is generated by the user on the projection plane.
The projection device according to any one of claims 1 to 8 , wherein the projection device is characterized in that. The projection surface includes a blackboard or a whiteboard, and the mark is drawn by the user on the projection surface using chalk or a pen.
9. The projection apparatus according to claim 9. A projection system including a projection device including a projection means for projecting an image on a projection surface and an image pickup device connected to the projection device.
The imaging device photographs the projection surface and transmits the captured image to the projection device.
The projection device
A recognition means for recognizing a mark from a captured image transmitted from the imaging device, and
A control means that controls the projection means based on the shape of the mark recognized by the recognition means, and
With
The control means controls switching between the operating state and the hibernation state of the projection means based on the shape of the mark recognized by the recognition means .
A projection system featuring. A projection system including a projection device including a projection means for projecting an image on a projection surface and an image pickup device connected to the projection device.
The imaging device photographs the projection surface and transmits the captured image to the projection device.
The projection device
A recognition means for recognizing a mark from a captured image transmitted from the imaging device, and
A control means that controls the projection means based on the shape of the mark recognized by the recognition means, and
With
The recognition means recognizes the mark from the projection surface even when the projection means is in a dormant state during the operation of the projection device .
A projection system featuring. It is a control method for controlling a projection means for projecting an image on a projection surface.
A reading step of reading a mark from a projection surface projected by the projection means,
A control step of controlling the projection means based on the shape of the mark read in the reading step, and a control step of controlling the projection means.
Only including,
The control step is a control method for controlling switching between an operating state and a hibernation state of the projection means based on the shape of the mark read by the reading step. A control method for controlling a projection device including a projection means for projecting an image on a projection surface.
A reading step of reading a mark from a projection surface projected by the projection means,
A step of controlling the projection means based on the shape of the mark read in the reading step, and a step of controlling the projection means.
Including
The reading step is a control method for reading the mark from the projection surface even when the projection means is in a dormant state during the operation of the projection device. A computer used in a projection device equipped with a projection means for projecting an image on a projection surface.
A reading means for reading a mark from the projection surface,
A control means that controls the projection means based on the shape of the mark read by the reading means,
To function as,
The control means is a program that controls switching between an operating state and a hibernation state of the projection means based on the shape of the mark read by the reading means. A computer used in a projection device equipped with a projection means for projecting an image on a projection surface.
A reading means for reading a mark from the projection surface,
A control means that controls the projection means based on the shape of the mark read by the reading means,
To function as
The reading means projects the projection even when the projection means is in a dormant state during the operation of the projection device.
A program that reads the mark from the surface.

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