JP7255842B2 - PROJECTION IMAGE SPECIFICATION DEVICE, GRAPHIC PROJECTION SYSTEM, PROJECTION IMAGE SPECIFICATION METHOD AND PROGRAM - Google Patents

Description

The present invention relates to a projection image designation device, a graphic projection system, a projection image designation method, and a program.

Japanese Unexamined Patent Application Publication No. 2002-200001 discloses a device for setting a monitoring area of an automatic video monitoring system. According to the document, this device sets a monitoring area by setting three markers at equal intervals on one side of a monitoring area, photographing them with a monitoring camera 20, and detecting them with an image processing unit 12. .

Patent Literature 2 discloses a position measuring and plotting device that is easy to operate, can minimize measurement work at a traffic accident site, and can easily create a site sketch at the accident site. According to the document, this position measuring and plotting device displays an image of a desired position photographed by photographing means. Then, this position measuring and plotting device creates a site sketch by detecting the coordinates of markers placed at desired positions on the image.

Japanese Patent Application Laid-Open No. 2001-204007 JP-A-2-281380

The following analysis is given by the present invention. There is a need to project an image of a specific shape using a projection device represented by a projector device. For example, by installing a projector in a room or aisle and presenting an image of an arbitrary color, it is possible to draw attention or create a space. In short, by projecting an image of the shape of the centerline or pedestrian crossing onto the aisle inside the building, it becomes possible to organize the traffic in the venue at any time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection image designation device, a graphic projection system, a projection image designation method, and a program that can contribute to providing a simple method of designating an image to be projected by a projection device.

According to the first viewpoint, a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projectable range of the projection device are connected to each other, and based on an image photographed by the photographing device, a projection image designating device comprising: a graphic recognizing unit that recognizes a graphic drawing operation by a user; and a projection control unit that instructs the projection device to project a graphic based on the graphic drawing operation. provided.
As a modification of the first viewpoint, an image captured by the imaging device is connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projectable range of the projection device. a region recognition unit that recognizes a user's placement operation of three or more markers, specifies the positions of each of the three or more markers, and creates region data related to a region delimited by the three or more markers; a projection control unit that instructs the projection device, based on the area data, to project the area created based on the installation operation of the three or more markers by the recognized user. An image designator is provided.

According to the second viewpoint, a projection device capable of projecting a predetermined range, a photographing device capable of photographing the projectable range of the projection device, and based on an image photographed by the photographing device, the user a projection image designating device comprising: a graphic recognizing unit for recognizing a graphic drawing operation by the A graphics projection system is provided.
As a modification of the second viewpoint, a projection device capable of projecting a predetermined range, a photographing device capable of photographing the projectable range of the projection device, and based on an image photographed by the photographing device, the user an area recognition unit for recognizing an installation operation of three or more markers by specifying the position of each of the three or more markers and creating area data related to an area delimited by the three or more markers; a projection image designation device for instructing the projection device to project the region created based on the installation operation of the three or more markers by the recognized user according to A graphics projection system is provided.

According to the third viewpoint, a computer connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projectable range of the projection device is photographed by the photographing device. a step of recognizing a figure drawing operation by the user based on an image; and a step of instructing the projection device to project a figure based on the recognized figure drawing operation by the user. A projection designation method is provided. This method is associated with a specific machine called a projection image designating device that accepts a graphic drawing operation from a user and instructs the projection of the graphic.
As a modification of the third viewpoint, a computer connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projectable range of the projection device is photographed by the photographing device. a step of recognizing an operation by a user to place three or more markers, specifying the positions of each of the three or more markers, and creating region data relating to a region delimited by the three or more markers, based on the obtained image; , based on the area data, instructing the projection device to project the area created based on the installation operation of the three or more markers by the recognized user. A specification method is provided.

According to a fourth aspect, there is provided a program for realizing the functions of the projection image designation device described above. This program can be recorded in a computer-readable (non-transitory) storage medium. That is, the present invention can also be embodied as a computer program product.

According to the present invention, it is possible to easily designate an image to be projected by a projection device.

It is a figure which shows the structure of one Embodiment of this invention. It is a figure for demonstrating the operation|movement of one Embodiment of this invention. It is a figure for demonstrating the operation|movement of one Embodiment of this invention. It is a figure for demonstrating the operation|movement of one Embodiment of this invention. It is a figure for demonstrating the operation|movement of one Embodiment of this invention. It is a figure for demonstrating the operation|movement of one Embodiment of this invention. 1 is a diagram showing the configuration of an area presentation system according to a first embodiment of the present invention; FIG. FIG. 3 is a diagram showing an example of region data held by the region presentation system according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the operation of the region presentation system according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the operation of the region presentation system according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the operation of the region presentation system according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the operation of the region presentation system according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining the effects of the region presentation system according to the first embodiment of the present invention; FIG. FIG. 10 is a diagram for explaining the operation of the region presentation system according to the second embodiment of the present invention; FIG. FIG. 11 is a diagram for explaining the operation of the region presentation system according to the third embodiment of the present invention; FIG. 11 is a diagram for explaining the operation of the region presentation system according to the third embodiment of the present invention; FIG. 12 is a diagram for explaining the operation of the region presentation system according to the fourth embodiment of the present invention; FIG. FIG. 12 is a diagram for explaining the operation of the region presentation system according to the fourth embodiment of the present invention; FIG. 1 is a diagram showing the configuration of a computer that constitutes the region presentation system of the present invention; FIG.

First, an outline of an embodiment of the present invention will be described with reference to the drawings. It should be noted that the drawing reference numerals added to this overview are added to each element for convenience as an example to aid understanding, and are not intended to limit the present invention to the illustrated embodiments. Also, connection lines between blocks in drawings and the like referred to in the following description include both bidirectional and unidirectional connections. The unidirectional arrows schematically show the flow of main signals (data) and do not exclude bidirectionality. Also, although there is a port or interface at the input/output connection point of each block in the drawing, it is omitted from the drawing. Moreover, in the following description, "A and/or B" is used to mean at least one of A and B.

In one embodiment of the present invention, as shown in FIG. 1, it is connected to a projection device 12 capable of projecting a predetermined range and a photographing device 11 capable of photographing the projection range of the projection device 12. can be realized by the projection image designating device 20. The projection image designation device 20 has a figure recognition unit 21 that recognizes a figure drawing operation by the user based on the image captured by the photographing device 11, and a figure recognition unit 21 that recognizes a figure drawing operation by the user based on the image drawing operation for the projection device 12. and a projection control unit 22 for instructing projection of the figure.

The operation of the projection image designation device 20 will be described with reference to FIGS. 2 to 6. FIG. First, as shown in FIG. 2, the user U places markers M at vertices of a shape to be projected by the projection device 12 . Here, it is assumed that the user draws a triangle using three markers.

Next, the photographing device 11 photographs an area including the markers M arranged by the user. A figure recognition unit 21 of the projection image designation device 20 recognizes a figure drawing operation by the user based on the image captured by the image capturing device 11 . In the example of FIG. 3, the pattern recognition unit 21 recognizes a triangle formed by markers M. In the example of FIG. The figure recognition section 21 passes the recognized contents to the projection control section 22 .

Next, the projection control unit 22 instructs the projection device 12 to project a triangle based on the graphic drawing operation. As a result, as shown in FIG. 4, a triangle TR1 having the three markers M as vertices is projected.

In a more desirable form, the projection image specifying device 20 accepts a correction operation by moving the marker M from the user. For example, as shown in FIG. 5, it is assumed that the user has moved the rightmost marker M to the right.

The figure recognition unit 21 of the projection image specifying device 20 recognizes the user's operation of correcting the figure based on the image captured by the image capturing device 11 . Finally, the projection control unit 22 projects a triangle TR2 shown in FIG. 6 based on the content recognized by the pattern recognition unit 21. FIG. This triangle TR2 has a wider area than the triangle TR1 in FIG. 4 by moving the rightmost marker M further to the right.

Note that the period during which the correction operation by moving the marker M is accepted from the user may be limited. For example, correction operations may be accepted only for a certain period after projection. Alternatively, the pattern recognition unit 21 may be caused to perform recognition at the timing of receiving a predetermined gesture from the user or a correction request operation by the communication device. Further, it is also possible to employ a configuration in which a correction request function is assigned to a button or the like provided in the projection image specifying device 20, and the start or end of the marker movement period is specified by operating (pressing) the button.

As described above, according to the present embodiment, it is possible to cause the projection device 12 to project a figure or the like having an intended shape with a simple operation. In the examples of FIGS. 2 to 6, the user arranges the marker M so as to form a triangular shape, but the shape recognizable by the projected image designating device 20 is not limited to a triangular shape. For example, a polygon with n vertices expressed using n markers M can be recognized. It is also possible to recognize and project any straight line using two markers. Furthermore, by changing the type (shape, color) of the marker M, the pattern recognition unit 21 can recognize the difference, and not only the normal polygonal corners but also rounded corners can be used properly. good. In addition, in the examples of FIGS. 4 to 6, it was explained that the figure including the marker is recognized based on the position of the marker, but the relationship between the position of the marker and the figure to be recognized can be defined by separate rules. can. For example, the inside of the marker may be recognized as a figure.

[First Embodiment]
Next, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7 is a diagram showing the configuration of the region presentation system according to the first embodiment of the present invention. Referring to FIG. 7, a configuration including an area recognition unit 101, a projection control unit 102, an area storage unit 103, a monitoring unit 104, a projection unit 106, and an imaging unit 107 is shown.

The projection control unit 102 projects an area using the area data registered in the area storage unit 103 using the projection unit 106 configured by one or more projection devices. As the projection device, a device using a DLP (registered trademark) system, an LCD system (transmissive liquid crystal system), an LCoS system (reflective liquid crystal system), or the like can be used. DLP is an abbreviation for Digital Light Processing. LCD is an abbreviation for Liquid Crystal Display, and LCoS is an abbreviation for Liquid Crystal on Silicon. A projection control unit 102 corresponds to the projection control unit 22 described above.

Of course, the projection control unit 102 may perform projection by controlling the projection unit 106 configured by a plurality of projection devices.

The photographing unit 107 is configured by one or more cameras capable of photographing an area covering the projectable area of the projection unit 106 . It is preferable that the photographing unit 107 be arranged close to and in parallel with the projecting unit 106 so that the position of the subject can be specified at coordinates that are substantially the same as the output coordinates of the projecting unit 106 . An image captured by the imaging unit 107 is input to the area recognition unit 101 and the monitoring unit 104 . Note that the projectable area of the projection unit 106 and the imaging area (covered area) of the imaging unit 107 may not be the same.

The region recognition unit 101 recognizes a user's region setting operation based on the image captured by the imaging unit 107 . Then, the area recognition unit 101 adds or reflects the information of the area set by the user to the area data of the area storage unit 103 . Therefore, the area recognition section 101 corresponds to the figure recognition section 21 described above. Note that when a plurality of imaging units 107 are provided, the area recognition unit 101 acquires images from the plurality of imaging units 107 and recognizes the area setting operation by the user.

The area storage unit 103 holds data of areas to be projected by the projection control unit 102 . FIG. 8 is a diagram showing an example of area data held by the area storage unit 103. As shown in FIG. In the example of FIG. 8, the area of ID#1 is the area inside the five points (x1, y1), (x2, y2), (x3, y3), (x4, y4), and (x5, y5). showing. Similarly, the area of ID#3 indicates the area inside three points (x6, y6), (x7, y7), and (x8, y8). As these coordinates, the same coordinates as those used when a projection device projects onto a general projection screen can be used. It should be noted that these representation forms of the regions are only examples. may be managed.

The monitoring unit 104 detects people, vehicles, robots, animals, etc. (hereinafter collectively referred to as “intruders or intruders”) approaching the area projected on the projection control unit 102 from the image captured by the imaging unit 107 . ) and detect its movement. Then, the monitoring unit 104 performs a predetermined warning operation or alerting operation when detecting the entry of these "intruders or intruders" into the area.

Next, the operation of this embodiment will be described in detail with reference to the drawings. FIG. 9 is a diagram for explaining the operation of the region presentation system 100 according to the first embodiment of the present invention. Assume that the user places cones (traffic cones) used as markers around the crane as shown in the left diagram of FIG.

The area recognition unit 101 of the area presentation system 100 identifies the position of the cone from the image captured by the imaging unit 107 , creates area data, and registers the area data in the area storage unit 103 . Here, it is assumed that five coordinates are identified as shown in the right diagram of FIG. As a result, area data corresponding to area ID #1 in FIG. 8 is generated.

As a result, the projection control unit 102 can present the area Z1 as shown in FIG. 10 based on the area data read from the area storage unit 103. FIG. Thereafter, the monitoring unit 104 monitors and warns an intruder to the area Z1, so that the area Z1 can be monitored as a dangerous area.

It is also possible to set two or more areas as described above. For example, as shown in the left diagram of FIG. 11, it is assumed that the user has placed a cone (traffic cone) outside the dangerous area.

The region recognition unit 101 of the region presentation system 100 identifies the position of the newly added cone from the image captured by the imaging unit 107, creates region data, and identifies the region as shown in the right diagram of FIG. Register in the storage unit 103 . As a result, area data corresponding to area ID #2 in FIG. 8 is generated.

As a result, the projection control unit 102 can present the area Z2 as shown in FIG. 12 based on the area data read from the area storage unit 103. FIG. Thereafter, the monitoring unit 104 monitors an intruder to this area Z2. For example, when an intruder to this area Z2 is detected, it is possible to cause this area Z2 to function as a gray zone by performing an alerting action instead of issuing a warning.

When correcting the regions Z1 and Z2, the following two methods can be adopted. One of them is a method of moving a cone (traffic cone) and having the area recognition unit 101 of the area presentation system 100 re-recognize it, as shown in FIGS. Another method is to rearrange all the cones (traffic cones) and have the area recognition unit 101 of the area presentation system 100 recognize them again. In either case, since the region can be corrected while viewing the region projected by the projection control unit 102, the region can be corrected efficiently.

As described above, according to the area presentation system 100 of the present embodiment, it is possible to efficiently set the area to be projected by the projection device. The reason for this is that the projection control unit 102 presents the area and provides a simple user interface that allows the area to be set by arranging cones (traffic cones).

FIG. 13 is a diagram for explaining the advantage (effect) of the present invention over the method of designating the point a2 from the captured image shown in Background Art. The left diagram of FIG. 13 shows a state in which a pointer P is used to designate a point a2 from the photographed image shown in Background Art. However, with this method, as shown in the right diagram of FIG. 13, it becomes difficult to determine whether point a3 on the same straight line as point a2 from the position of the camera has been selected or not. On the other hand, according to the present invention, as shown in FIG. 3, the marker is actually placed and photographed with a camera for recognition, thereby solving the problem that the intended range cannot be specified. It will be.

In the above-described embodiment, an example in which an area is specified by photographing a cone (traffic cone) with a camera has been described, but the marker is not limited to a cone (traffic cone). As long as recognition by the region recognition unit 101 is preferably performed, any shape of a sign board, a light emitter, or the like can be used as a marker. Also, the device used by the area recognition unit 101 for marker recognition is not limited to a camera. For example, the position of the marker may be specified using a distance sensor or the like that can specify the distance and direction from the marker. Further, for example, a configuration in which the marker itself is provided with position measuring means such as GPS (Global Positioning System) and the position information is received can also be adopted. In this case, the region presentation system 100 is provided with position information receiving means.

[Second embodiment]
Next, a second embodiment in which the area recognition method of the area recognition unit 101 is changed will be described in detail with reference to the drawings. Since the second embodiment of the present invention can be implemented with a configuration similar to that of the first embodiment, differences in operation will be mainly described below. FIG. 14 is a diagram for explaining the operation of the region presentation system 100 according to the second embodiment of the present invention. Assume that the user draws an area around the crane by moving the cone as shown in the left diagram of FIG.

The region recognizing unit 101 of the region presentation system 100 identifies the movement trajectory of the cone from the image captured by the imaging unit 107 , creates region data corresponding to the region surrounded by this movement trajectory, and stores the region data in the region storage unit 103 . to register. For example, when the user draws a pentagon similar to that of the first embodiment, five coordinates can be identified as in the first embodiment. As a result, area data corresponding to area ID #1 in FIG. 8 is generated. Of course, the user may move the cone and draw an irregular area freehand. In that case, area data having the coordinates of the trajectory of the marker may be created and registered in the area storage unit 103 .

As described above, according to this embodiment, it is possible to obtain a configuration in which an area can be specified with one marker. Of course, in the present embodiment as well, the area can be corrected while viewing the area projected by the projection control unit 102, so the area can be corrected efficiently.

[Third Embodiment]
Next, a third embodiment in which projected markers (virtual markers) are used as markers will be described in detail with reference to the drawings. Since the third embodiment of the present invention can be implemented with a configuration similar to that of the first embodiment, differences in operation thereof will be mainly described below. FIG. 15 is a diagram for explaining the operation of the region presentation system 100 according to the third embodiment of the present invention. When the user performs a predetermined gesture while the imaging unit 107 has started imaging, a virtual marker is displayed as shown in the left diagram of FIG. 15 . The display form of the virtual markers may be a form in which a plurality of virtual markers are displayed at once, or a form in which virtual markers are displayed one by one at positions specified by the user according to the user's gesture. .

Then, the area presentation system 100 uses the projection unit 106 and the imaging unit 107 to provide an interface for correcting the positions of these virtual markers according to the user's (second) gesture. For example, the region presentation system 100 uses the projection unit 106 and the imaging unit 107 to receive the movement of the virtual marker by drag-and-drop operation of the virtual marker, as shown in FIG. 16 . Finally, as shown in the right diagram of FIG. 16, the user moves the point (x2, y2) to the point (x2a, y2a) to specify the area.

As described above, according to this embodiment, it is possible to obtain a configuration that allows designation of an area without preparing a physical marker. Of course, in the present embodiment as well, the area can be corrected while viewing the area projected by the projection control unit 102, so the area can be corrected efficiently. Also in the present embodiment, as in the second embodiment, a method of recognizing the movement locus of the virtual marker and recognizing the area can be adopted.

[Fourth embodiment]
Next, a detailed description will be given of a fourth embodiment in which created areas can be combined and divided with reference to the drawings. Since the fourth embodiment of the present invention can be implemented with a configuration similar to that of the first embodiment, differences in operation will be mainly described below. FIG. 17 is a diagram for explaining the operation of the region presentation system 100 according to the fourth embodiment of the present invention. For example, as shown in FIG. 17, it is assumed that two dangerous areas Z3 and Z4 have already been created. When the user performs a predetermined area combining operation in that state, the area presentation system 100 combines the dangerous areas Z3 and Z4 to create a dangerous area Z5, as shown in the right diagram of FIG.

FIG. 18 is a diagram for explaining another operation of the region presentation system 100 according to the fourth embodiment of the present invention. For example, as shown in FIG. 18, it is assumed that a dangerous area Z5 has already been created. When the user stands in front of the projection unit 106 in this state, the user is shaded, and the dangerous area Z5 is divided into two as shown in FIG. In this state, when the user makes a predetermined gesture, the area presentation system 100 divides the dangerous area Z5 into dangerous areas Z5-1 and Z5-2 as shown in the right diagram of FIG.

As described above, according to this embodiment, it is possible to obtain a configuration in which the shape of the area can be changed without moving the marker. Further, the region presentation system 100 may present basic region graphics such as rectangles, triangles, circles, etc. according to a predetermined gesture of the user. In this way, by combining and dividing these figures, it is possible to obtain a configuration for creating regions of arbitrary shape.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiments, and further modifications, replacements, and adjustments can be made without departing from the basic technical idea of the present invention. can be added. For example, the device configuration, the configuration of each element, and the representation form of data shown in each drawing are examples for helping understanding of the present invention, and are not limited to the configuration shown in these drawings.

In each of the above-described embodiments, an example in which the present invention is used to specify the region of the region presentation system 100 has been described. It can be applied to specified uses. For example, when projecting a line inside a building, the region presentation system 100 may be caused to recognize a line drawn with a marker or the like and project it.

Further, the procedures shown in the above-described first to fourth embodiments can be realized by a program that causes the computer (9000 in FIG. 19) functioning as the region presentation system 100 to realize the function as the region presentation system 100. . Such a computer is exemplified by a configuration including a CPU (Central Processing Unit) 9010, a communication interface 9020, a memory 9030, and an auxiliary storage device 9040 in FIG. That is, the CPU 9010 in FIG. 19 may execute the area recognition program and the projection control program to update each calculation parameter held in the auxiliary storage device 9040 or the like.

That is, each part (processing means, function) of the region presentation system 100 shown in each of the above-described embodiments is a computer that causes the processor mounted in the region presentation system 100 to execute each of the above-described processes using its hardware. It can be implemented by a program.

Finally, preferred forms of the invention are summarized.
[First form]
(Refer to the projection image designating device from the first viewpoint above.)
[Second form]
The drawing operation of the figure by the user recognized by the projection image designation device is as follows:
An operation of placing three or more markers by the user;
The projection control section can adopt a configuration for projecting the area delimited by the three or more markers.
[Third form]
The drawing operation of the figure by the user recognized by the projection image designation device is as follows:
An operation in which the user moves a marker to enclose an area,
The projection control section can adopt a configuration that projects the area specified by the trajectory of the marker.
[Fourth mode]
In the projection image designation device described above,
A configuration can be adopted in which a virtual marker projected by the projection device is used as the marker.
[Fifth form]
In the projection image designation device described above,
The figure recognition unit may be configured to recognize an operation of the user's gesture on the virtual marker projected by the projection device.
[Sixth form]
In the projection image designation device described above,
The graphic recognition unit can recognize at least one of installation of the virtual marker, movement of the virtual marker, cutting of areas, and joining of areas as the user's gesture.
[Seventh form]
In the projection image designation device described above,
The figure recognition unit recognizes a figure modification operation by a user with reference to the projected figure,
The projection control unit may be configured to instruct the projection device to project a figure reflecting the modification operation of the figure.
[Eighth form]
(Refer to the graphic projection system from the second point of view above)
[Ninth form]
(Refer to the projection image specification method from the third viewpoint above)
[Tenth mode]
(Refer to the program from the fourth viewpoint above)
It should be noted that the above eighth to tenth modes can be developed into second to seventh modes in the same manner as the first mode.

It should be noted that each disclosure of the above patent documents is incorporated herein by reference. Within the framework of the full disclosure of the present invention (including the scope of claims), modifications and adjustments of the embodiments and examples are possible based on the basic technical concept thereof. Also, within the framework of the disclosure of the present invention, various combinations or selections (partial (including targeted deletion) is possible. That is, the present invention naturally includes various variations and modifications that can be made by those skilled in the art according to the entire disclosure including claims and technical ideas. In particular, any numerical range recited herein should be construed as specifically recited for any numerical value or subrange within that range, even if not otherwise stated.

REFERENCE SIGNS LIST 11 photographing device 12 projection device 20 projection image designating device 21 graphic recognition unit 22 projection control unit 100 area presentation system 101 area recognition unit 102 projection control unit 103 area storage unit 104 monitoring unit 106 projection unit 107 imaging unit 9000 computer 9010 CPU
9020 Communication interface 9030 Memory 9040 Auxiliary storage device M Marker TR1, TR2 Triangle U User Z1 to Z5, Z5-1, Z5-2 Area

Claims (9)

connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projectable range of the projection device;
Based on the image captured by the photographing device, recognizing the operation of placing three or more markers by the user , specifying the positions of each of the three or more markers, and relating to the area delimited by the three or more markers an area recognition unit that creates area data ;
a projection control unit that instructs the projection device , based on the area data , to project the area created based on the installation operation of the three or more markers by the recognized user;
A projection image designation device with a The installation operation of the three or more markers by the user is
an operation in which the user moves the marker to enclose the area;
2. A projection image designating device according to claim 1 , wherein said projection control unit instructs said projection device to project said region designated by said locus of said marker based on said region data . 3. A projection image specifying device according to claim 1 , wherein said marker is a virtual marker projected by said projection device. 4. The projection image designation device according to claim 3 , wherein the area recognition unit recognizes an operation by the user's gesture on the virtual marker projected by the projection device. 5. The projection image designating device according to claim 4 , wherein said area recognition unit can recognize at least one of installation of said virtual marker, movement of said virtual marker, cutting of areas, and joining of areas as said user's gesture. The area recognition unit recognizes an area correction operation by a user with reference to the projected area ,
6. The projection image designation device according to claim 1, wherein the projection control unit instructs the projection device to project the area reflecting the correction operation of the area . a projection device capable of projecting a predetermined range;
a photographing device capable of photographing a projectable range of the projection device;
Based on the image captured by the photographing device, recognizing the operation of placing three or more markers by the user , specifying the positions of each of the three or more markers, and relating to the area delimited by the three or more markers an area recognition unit that creates area data ;
a projection control unit that instructs the projection device , based on the area data , to project the area created based on the installation operation of the three or more markers by the recognized user. an image designator;
Figure projection system including. A computer connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projection range of the projection device,
Based on the image captured by the photographing device, recognizing the operation of placing three or more markers by the user , specifying the positions of each of the three or more markers, and relating to the area delimited by the three or more markers creating regional data ;
a step of instructing the projection device to project the area created based on the installation operation of the three or more markers by the recognized user , based on the area data ;
projection image specification method with A computer connected to a projection device capable of projecting a predetermined range and a photographing device capable of photographing the projection range of the projection device,
Based on the image captured by the photographing device, recognizing the operation of placing three or more markers by the user , specifying the positions of each of the three or more markers, and relating to the area delimited by the three or more markers a process of creating region data ;
a process of instructing the projection device to project the area created based on the installation operation of the three or more markers by the recognized user , based on the area data ;
program to run.

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