JP2011008019A - Controller, projector, control method, projection method, control program, projection program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change image information to be projected in accordance with projection area for projecting the image information on an object on which it is projected.SOLUTION: This controller 110 obtains the information related to projection area for projecting image information on the object on which it is projected from the projector 100 when it is determined that there is the image information set to be projected by a user. A selection part 111 selects one type of image information from among a group of image information including the image information set to be projected by the user. Next, a transmission part 113 transmits the selected image information into the projector 100. The projector 100 changes the image information to be projected on the object by a projection part 102 into the image information acquired from the controller 110 by a projection control part 107.

Description

  The present invention relates to a control device, a projection device, a control method, a projection method, a control program, a projection program, and a recording medium that change image information to be projected according to a projection area when image information is projected onto a projection object. However, use of the present invention is not limited to the above-described control device, projection device, control method, projection method, control program, projection program, and recording medium.

  In a plurality of three-dimensional model patterns prepared in advance according to the bottom shape and height information of a building, a three-dimensional landscape display device that changes the degree of detail of the three-dimensional model according to the distance from the viewpoint has been proposed (for example, the following patents) Reference 1). Here, the three-dimensional model that expresses details at short distances is preferable in terms of reality, but if a model with the same level of detail is used at long distances, the details may be crushed and difficult to understand. You may get an impression. Further, the number of processing steps increases, and the load on the CPU also increases. For this reason, three-dimensional models with different levels of detail are generated at short distance, medium distance, and long distance. This makes it easy to see the display, reduces the device load, and avoids wasting hardware resources.

JP 2002-298162 A

  However, in the technique of Patent Document 1 described above, it is possible to display a three-dimensional model having a different level of detail depending on the position of the user, but by moving the dimensional landscape display device, for example, the size of the displayed three-dimensional model is increased. Even if they are different, the level of detail cannot be changed. For this reason, for example, when a three-dimensional model that is not so detailed is displayed in a large size, it is not efficient because detailed information is not displayed even though it is projected with great effort. In addition, when a more detailed three-dimensional model is displayed in a small size, there is a problem that character information, image information, and the like are too small to be viewed.

  In order to solve the above-described problems and achieve the object, the control device according to the first aspect of the present invention performs projection by the user based on information on the projection area when projecting image information onto the projection object. A selection unit that selects one piece of image information from an image information group that includes the set image information, and a projection device that projects the piece of image information selected by the selection unit onto the projection object. And transmitting means for transmitting to.

  A projection apparatus according to a ninth aspect of the invention is a projection apparatus having the control device according to any one of the first to eighth aspects, wherein one piece of image information in the image information group is projected. , A projection area detecting means for detecting a projection area of the image information projected onto the projection object by the projection means, and a projection area detecting means of the image information group. The acquisition unit that acquires the image information corresponding to the projected area from the control device, and the image information that is projected onto the projection object by the projection unit is changed to the image information acquired by the acquisition unit. And a projection control means.

  According to a twelfth aspect of the present invention, there is provided a control method including an image information group including image information set to be projected by a user based on information relating to a projection area when projecting image information onto a projection object. A selection step of selecting one image information from the above, and a transmission step of transmitting the one piece of image information selected by the selection step to a projection device that projects the image information onto the projection object. Features.

  A projection method according to a thirteenth aspect of the invention is a projection method in a projection device having the control device according to any one of the first to eighth aspects, wherein one piece of image information in the image information group is obtained. A projection area detecting step of detecting a projection area of the image information projected onto the projection object by a projection unit that projects onto the projection object; and the projection area detection step of the image information group detected by the projection area detection step. An acquisition step of acquiring one image information corresponding to the projection area from the control device, and a projection for changing the image information projected on the projection object by the projection unit to the image information acquired by the acquisition step And a control step.

  A control program according to claim 14 causes a computer to execute the control method according to claim 12.

  According to a fifteenth aspect of the present invention, a projection program causes a computer to execute the projection method according to the thirteenth aspect.

  According to a sixteenth aspect of the present invention, there is provided a recording medium in which the control program according to the fourteenth aspect or the projection program according to the fifteenth aspect is recorded in a computer-readable state.

It is a block diagram which shows the functional structure of the projection apparatus concerning this Embodiment. It is a flowchart which shows the control processing procedure of a control apparatus. It is a flowchart which shows the projection processing procedure of a projector. It is a block diagram which shows the hardware constitutions of the mobile telephone concerning a present Example. It is a flowchart which shows the content of the process of a mobile telephone. It is a graph which shows the map information according to a projection area among map information groups. It is explanatory drawing shown about an example in case the map information projected on a mobile telephone and a projection surface is the same. It is explanatory drawing shown about an example in case the map information projected on a mobile telephone and a projection surface is the same. It is explanatory drawing shown about an example in case the map information projected on a mobile telephone and a projection surface is the same. It is explanatory drawing shown about the example when the map information projected on a mobile telephone and a projection surface differs. It is explanatory drawing shown about the example when the map information projected on a mobile telephone and a projection surface differs. It is explanatory drawing shown about the example when the map information projected on a mobile telephone and a projection surface differs. It is explanatory drawing shown about the other example when the map information projected on a mobile telephone and a projection surface differs. It is explanatory drawing shown about the change function of the map information projected on the projection surface. It is explanatory drawing shown about the other change function of the map information projected on the projection surface. It is explanatory drawing shown about the other change function of the map information projected on the projection surface.

  Exemplary embodiments of a control device, a projection device, a control method, a projection method, a control program, a projection program, and a recording medium according to the present invention will be described below in detail with reference to the accompanying drawings.

(Embodiment)
(Functional configuration of the projection device)
First, the functional configuration of the projection apparatus 100 according to the embodiment of the present invention will be described. FIG. 1 is a block diagram showing a functional configuration of the projection apparatus according to the present embodiment.

  In FIG. 1, a projection apparatus 100 includes a display unit 101, a projection unit 102, a projection area detection unit 103, an imaging unit 104, a distance detection unit 105, an acquisition unit 106, a projection control unit 107, and a control device. 110. The projection apparatus 100 projects image information selected from, for example, an image information group stored in a database (DB) 120 by the control apparatus 110 onto a projection object.

  Specifically, the image information group includes, for example, a map information group classified by scale, a nationwide map, a prefecture map, a municipality map, a narrow street map, a city map, etc. A map information group classified into a regional map, a detailed map, a city map, etc., or a map information group classified into a display distance per dot based on a specific display resolution. The map information includes road network data composed of nodes and links, and image data drawn using features relating to facilities, roads, and other terrain (mountains, rivers, land). The map information may include character information, information such as facility names and addresses, road and facility images, and the like. Further, the map information may have different amounts of information regarding details and the like at different scales. Specifically, if the scale is large, the amount of information related to details and the like may increase and the content may become detailed. Further, the map information may be similar in scale but different in the amount of information related to details and the like.

  In the present embodiment, the image information is map information, but the present invention is not limited to this. Specifically, for example, an image information group in which different display forms are collected or an image information group to which arbitrary information such as user specific information is added may be used.

  First, the control device 110 will be described. The control device 110 includes a selection unit 111, an image processing unit 112, and a transmission unit 113. Note that the control device 110 may be the same as or separate from the projection device 100.

  The selection unit 111 selects one piece of image information from the image information group including the image information set to be projected by the user based on the information regarding the projection area when the image information is projected onto the projection object. select. Information relating to the projection area when projecting image information onto the projection object is detected by, for example, a projection area detection unit 103 provided in the projection apparatus 100 described later.

  Specifically, for example, the selection unit 111 selects image information with a larger scale as the projection area when projecting image information onto a projection object is larger. Further, the selection unit 111 selects image information having a wider display range as the projection area when projecting image information onto the projection object is larger. The selection unit 111 may select image information having a larger amount of information regarding details and the like as the projection area when projecting image information onto the projection object is larger. Further, the selection unit 111 selects one piece of image information from the image information group based on the information on the movement direction and the movement amount of the projection surface of the projection object.

  The image processing unit 112 removes the unique information of the user from the image information when the projection area when projecting the image information onto the projection object is greater than or equal to a predetermined value. In addition, the image processing unit 112, based on the information on the importance of the character information included in the image information, increases the character having a predetermined importance or higher as the projection area when the image information is projected onto the projection object is larger. Increase information. When the image information is map information, the character information included in the image information is, for example, a map note such as a main place name or facility name.

  The transmission unit 113 transmits the one piece of image information selected by the selection unit 111 to the projection apparatus 100 that projects the image information onto the projection target.

  Next, other configuration requirements of the projection apparatus 100 will be described. The display unit 101 includes a display screen that displays image information. Specific examples of the image information include map information. The display unit 101 may be a display screen of a mobile phone when the projection device 100 is provided in a mobile phone.

  The projection unit 102 projects one piece of image information in the image information group onto the projection object. Specifically, the projection unit 102 is, for example, a projector device. That is, the projection unit 102 includes a light source system for projecting image information onto a projection object and an optical system for enlarging the projected image information. The optical system may have an autofocus function for automatically adjusting the focus of the image information projected on the projection object and a zoom function for changing the size of the projected image information.

  The projection area detection unit 103 detects the projection area of the image information projected on the projection object by the projection unit 102. The projection area varies depending on, for example, the zoom function of the projection unit 102 and the distance between the projection apparatus 100 and the projection object. Further, the projection area detection unit 103 may include a photographing unit 104 and a distance detection unit 105. The imaging unit 104 captures the projection object so as to include all the image information projected on the projection object. Further, the distance detection unit 105 detects the distance to the projection object.

  Then, the projection area detection unit 103 is projected onto the projection based on the ratio of the image information in the projection captured by the imaging unit 104 and the distance to the projection detected by the distance detection unit 105. A projected area of image information is detected. The projected area detection unit 103 measures the distance to the projection object by the distance detection unit 105, but is not limited thereto. For example, when the distance to the projection object is measured when the projection unit 102 executes the autofocus function, this distance may be used. Further, the projection area detection unit 103 detects the projection area of the image information projected on the projection object based on the magnification of the zoom function of the optical system provided in the projection unit 102 and the distance to the projection object. May be.

  The acquisition unit 106 acquires, from the control device 110, one piece of image information corresponding to the projection area detected by the projection area detection unit 103 in the image information group. Specifically, the acquisition unit 106, for example, the larger the projection area detected by the projection area detection unit 103, the larger the image information with a large scale, the image information with a wide display range, or the information amount with respect to details and the like. Get information. Furthermore, the acquisition unit 106 may acquire one piece of selected image information from the image information group based on information regarding the movement direction and movement amount of the projection surface of the projection object.

  The projection control unit 107 changes the image information projected on the projection object by the projection unit 102 to the image information acquired by the acquisition unit 106. Therefore, the projection control unit 107 can project image information corresponding to the projection area detected by the projection area detection unit 103 onto the projection object at any time. In addition, the projection control unit 107 changes the image information projected onto the projection object by the projection unit 102 to the image information acquired by the acquisition unit 106 and controls the display unit 101 to change the image before the change. Display information. Therefore, the image information to be displayed on the display unit 101 and the image information to be projected onto the projection object by the projection unit 102 can be made different image information. That is, without changing the image information displayed on the display unit 101, the image information to be projected onto the projection object can be changed according to the projection area detected by the projection area detection unit 103.

  Note that the projection control unit 107 may not control the display unit 101. In this case, the display unit 101 may be controlled separately from the projection control unit 107 by a display control unit (not shown). Therefore, the display unit 101 and the projection unit 102 may be controlled by different components. That is, the display unit 101 can display desired information regardless of information projected by the projection unit 102 described later.

(Control processing procedure of control device)
Next, a control processing procedure of the control device 110 will be described. FIG. 2 is a flowchart showing a control processing procedure of the control device. In the flowchart of FIG. 2, the process waits until it is determined that there is image information set to be projected by the user (step S201: No loop). When it is determined in step S201 that there is image information set to be projected by the user (step S201: Yes), information on the projection area when projecting the image information onto the projection object is obtained from the projection apparatus 100 (Step S202).

  Then, the selection unit 111 selects one piece of image information from the image information group including the image information set to be projected by the user in step S201 (step S203). Next, the transmission unit 113 transmits the image information selected in step S203 to the projection apparatus 100 (step S204), and the series of processing ends.

  In the flowchart of FIG. 2, in step S203, specifically, for example, the larger the projected area acquired in step S202, the larger the scale image information, the image information with a wide display range, or the details. Image information with a large amount of information is selected. In step S203, when information about the movement direction and movement amount of the projection surface of the projection object is acquired, the selection unit 111 selects one piece of image information from the image information group based on the information. May be.

  In the flowchart of FIG. 2, when the projected area acquired in step S202 is greater than or equal to a predetermined value, the image processing unit 112 may remove the user specific information from the image information selected in step S203. Further, the larger the projected area acquired in step S202, the larger the predetermined importance or higher by the image processing unit 112 based on the information related to the importance of the character information included in the image information selected by the selection unit 111. Character information may be enlarged.

(Projection procedure of the projection device)
Next, the projection processing procedure of the projection apparatus 100 will be described. FIG. 3 is a flowchart showing a projection processing procedure of the projection apparatus. In the flowchart of FIG. 3, first, the process waits until the projection unit 102 determines that image information is projected on the projection object (step S <b> 301: No loop). When it is determined in step S301 that image information is projected on the projection (step S301: Yes), the projection unit 104 captures the projection (step S302). In step S302, the projection object is photographed so as to include all the image information determined to be projected on the projection object in step S301: Yes. Further, the distance detection unit 105 detects the distance to the projection object (step S303).

  Then, based on the ratio of the image information determined to be projected onto the projection object at Step S301: Yes and the distance to the projection object detected at Step S303 in the projection object photographed at Step S302. Then, the projection area of the image information projected on the projection object is detected (step S304).

  Next, one of the image information groups including the image information determined to be projected onto the projection object by the acquisition unit 106 in step S301: Yes, according to the projection area detected in step S304. Image information is acquired from the control device 110 (step S305). Then, the image information to be projected onto the projection object by the projection unit 102 is changed to the image information acquired in step S305 by the projection control unit 107 (step S306), and the series of processing ends.

  In the flowchart of FIG. 3, when changing the image projected on the projection object in step S306, for example, the display unit 101 displays the image information determined to be projected on the projection object in step S301. If it is, the display of the image information displayed as it is may be continued without changing to the single image information corresponding to the projection area acquired in step S305.

  In the flowchart of FIG. 3, the object to be projected is photographed in step S302, but the present invention is not limited to this. Specifically, for example, step S302 may be omitted, and the zoom magnification in the optical system provided in the projection unit 102 may be acquired. In this case, in step S304, the projection area of the image information projected on the projection object may be detected based on the zoom magnification and the distance to the projection object detected in step S303.

  As described above, the control device 110 according to the present embodiment is set to be projected by the user based on the information regarding the projection area when the image information is projected onto the projection object by the selection unit 111. One image information is selected from the image information group including the image information, and the selected one piece of image information is transmitted by the transmission unit 113 to the projection apparatus 100 that projects the image information on the projection object. it can. Accordingly, it is possible to select optimal image information corresponding to the projected area from the image information group as needed. As a result, for example, when projecting image information displayed on a display of a mobile phone, the user has the same image as the image information displayed on the display even though the projection area is relatively large compared to the area of the display. By projecting information, it is possible to prevent the projected image information from becoming difficult to see. Further, the user can change the image information to be projected by a simple operation, for example, by simply changing the distance from the mobile phone to the projection object.

  Moreover, the control apparatus 110 concerning this Embodiment can select the image information with a larger scale, so that the selection part 111 has a large projection area when projecting image information on a to-be-projected object. Thereby, the user can easily confirm the map information with a large scale by projecting it even if the map information is displayed with a large scale on the display of a mobile phone, and the map information is too small to be seen.

  Moreover, the control apparatus 110 concerning this Embodiment can select the image information with a wide display range, so that the projection area when projecting image information on a to-be-projected object is large by the selection part 111. FIG. As a result, even if the geographical range is determined by the scale and the wide range cannot be confirmed on the display of the mobile phone, for example, the user can easily confirm the map information of the wide geographical range by projecting.

  In addition, the control device 110 according to the present embodiment uses the selection unit 111 to select image information with a large amount of information related to details and the like as the projection area when projecting image information onto the projection object is larger. be able to. Therefore, a user can easily confirm information by projecting information that cannot be displayed on a display of a mobile phone, for example.

  In addition, the control device 110 according to the present embodiment uses the selection unit 111 to select one piece of image information from the image information group based on information regarding the movement direction and movement amount of the projection surface of the projection object. Can do. As a result, the user can easily check the map information of a different geographical range simply by changing the direction of the mobile phone. Therefore, for example, the situation around the displayed point can be easily confirmed.

  In addition, the control device 110 according to the present embodiment removes the unique information of the user from the image information when the image processing unit 112 projects the image information onto the projection object when the projection area is a predetermined value or more. Can do. Thus, the user can prevent the third person from seeing his / her own unique information, for example, when the projection area of the image information to which the unique information is added is increased.

  Further, in the control device 110 according to the present embodiment, the image processing unit 112 has a large projection area when projecting the image information onto the projection object based on the information regarding the importance of the character information included in the image information. The larger the value, the larger the character information having a predetermined importance or higher. Therefore, the user is assumed to be at a farther distance from the projection plane as the projected area is larger, for example, but even in that case, the user can check the character information included in the image information.

  In addition, the projection apparatus 100 according to the present embodiment detects the projection area of the image information projected on the projection object by the projection unit 102 by the projection area detection unit 103, and the acquisition unit 106 of the image information group. One piece of image information corresponding to the projection area is acquired from the control device 110, and the projection control unit 107 changes the image information projected onto the projection object by the projection unit 102 to the image information acquired by the acquisition unit 106. can do. As a result, for example, when projecting image information displayed on a display of a mobile phone, the user has the same image as the image information displayed on the display even though the projection area is relatively large compared to the area of the display. By projecting information, it is possible to prevent the projected image information from becoming difficult to see. Further, the user can change the image information to be projected by a simple operation, for example, by simply changing the distance from the mobile phone to the projection object.

  In addition, in the projection apparatus 100 according to the present embodiment, in the projection area detection unit 103, the ratio of the image information in the projection object captured by the imaging unit 104 and the distance to the projection object detected by the distance detection unit 105. Based on the above, it is possible to detect the projection area of the image information projected on the projection object. Therefore, for example, if a projection object is photographed with a camera provided in a mobile phone, the projection area of image information on the projection object can be easily detected only by knowing the distance to the projection object.

  In addition, the projection device 100 according to the present embodiment changes the image information projected onto the projection object by the projection unit 102 to the image information acquired by the acquisition unit 106, and also displays the display unit 101 by the projection control unit 107. Can be controlled to display the image information before being changed. Therefore, the image information displayed on the display and the image information projected on the projection object can be made different image information. As a result, the user can change the projected image information according to the projected area while keeping the image information displayed on the display of the mobile phone, for example.

  Examples of the present invention will be described below. In the present embodiment, an example will be described in which the control device of the present invention is implemented by a mobile phone that can be carried by a user, and the projection device of the present invention is implemented by a projector mounted on the mobile phone.

(Mobile phone hardware configuration)
Next, a hardware configuration of the mobile phone 400 according to the present embodiment will be described. FIG. 4 is a block diagram of a hardware configuration of the mobile phone according to the present embodiment. In FIG. 4, a mobile phone 400 includes a CPU 401, a ROM 402, a RAM 403, a magnetic disk drive 404, a magnetic disk 405, a memory card adapter 406, a memory card 407, a voice I / F (interface) 408, and a microphone. 409, a speaker 410, an input device 411, a video I / F 412, a display 413, a communication I / F 414, a GPS unit 415, various sensors 416, a camera 417, and a projector 418. . Each component 401-418 is connected by the bus | bath 420, respectively.

  First, the CPU 401 governs overall control of the mobile phone 400. The ROM 402 stores programs such as a boot program, a data update program, an image information selection program, and an image processing program. The RAM 403 is used as a work area for the CPU 401. That is, the CPU 401 controls the entire mobile phone 400 by executing various programs recorded in the ROM 402 while using the RAM 403 as a work area.

  As will be described in detail later, the image information selection program causes one image information to be selected from the image information group based on the projection area of the image information projected onto the projection object. The image information selection program acquires information related to the projection area from, for example, the projector 418, and selects one piece of image information according to a table storing image information of an optimal scale for each projection area. That is, the image information selection program may select image information with a large scale or image information with a large amount of information related to details and the like as the projection area increases.

  The image processing program changes the projected geographical range or the size of the map annotation in the image information selected by the image information selection program. The image processing program changes the geographical range based on, for example, the projection area of the map information projected on the projection object. That is, the larger the projected area, the wider the geographical range. The image processing program may change the importance of the map note to be enlarged according to the projection area when the importance is attached to the map note. That is, the larger the projected area, the larger the importance of the map note may be as well as the higher importance of the map note.

  The magnetic disk drive 404 controls the reading / writing of the data with respect to the magnetic disk 405 according to control of CPU401. The magnetic disk 405 records data written under the control of the magnetic disk drive 404. As the magnetic disk 405, for example, an HD (hard disk) can be used.

  The memory card adapter 406 controls reading / writing of data with respect to the memory card 407 according to the control of the CPU 401. The memory card 407 is a rewritable nonvolatile semiconductor memory. Further, the detachable recording medium may be an optical disk or MD. In this case, for example, a drive that controls reading / writing of data with respect to an optical disc or MD may be externally attached to the mobile phone 400.

  Examples of information recorded on the magnetic disk 405 and the memory card 407 include a map information group and function data. Specifically, the map information group is based on, for example, a map information group classified for each scale, a map information group classified into a wide area map, a narrow area map, a detailed map, a city map, or a specific display resolution. A map information group classified into display distances per dot. The map information may be different in the amount of information regarding details and the like at different scales. Specifically, if the scale is small, the amount of information related to details and the like may increase and the content may become detailed. Further, the map information may be similar in scale but different in the amount of information related to details and the like. The map information group may not be recorded on the magnetic disk 405 and the memory card 407, and may be acquired as needed from a server (not shown) connected by the communication I / F 414, for example.

  The map information includes background data that represents features (features) such as buildings, rivers, and the ground surface, and road shape data that represents the shape of the road, and is composed of multiple data files divided by district. ing. The road shape data further includes traffic condition data. The traffic condition data includes, for example, whether or not there is a signal or a pedestrian crossing, whether or not there is a highway doorway or junction, the length (distance) of each link, road width, direction of travel, road type (highway, Such as toll roads and general roads).

  The function data is three-dimensional data representing the shape of the facility on the map, character data representing the description of the facility, and other various data other than the map data. Map information and function data are recorded in blocks divided by district or function. Specifically, for example, the map information is recorded in such a state that each map can be divided into blocks so that each map represents a predetermined district on the map displayed on the display screen. Further, for example, the function data is recorded in a state where each function can be divided into a plurality of blocks so as to realize one function.

  The function data is data for realizing functions such as program data for realizing route search, calculation of required time, route guidance, etc. in addition to the above-described three-dimensional data and character data. Each of the map information and the function data is composed of a plurality of data files divided for each district or each function.

  The audio I / F 408 is connected to a microphone 409 for audio input and a speaker 410 for audio output. The sound received by the microphone 409 is A / D converted in the sound I / F 408. From the speaker 410, a sound obtained by D / A converting a predetermined sound signal in the sound I / F 408 is output. Note that the voice input from the microphone 409 can be recorded on the magnetic disk 405 or the memory card 407 as voice data.

  Examples of the input device 411 include a keyboard having a plurality of keys for inputting characters, numerical values, various instructions, and a touch panel. The input device 411 may be realized by any one of a keyboard and a touch panel, but may be realized by a plurality of forms.

  The video I / F 412 is connected to the display 413. Specifically, the video I / F 412 is output from, for example, a graphic controller that controls the entire display 413, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. And a control IC for controlling the display 413 based on the image data to be processed.

  The display 413 displays icons, cursors, menus, windows, or various data such as characters and images. On the display 413, the map data described above is drawn two-dimensionally or three-dimensionally. The map data displayed on the display 413 can be displayed with a mark representing the current position of the mobile phone 400 superimposed thereon. The current position of the mobile phone 400 is calculated by the CPU 401.

  As the display 413, for example, a TFT liquid crystal display, a plasma display, or the like can be used. The display 413 is installed on the same side as the input device of the mobile phone 400, for example.

  The communication I / F 414 is connected to a network via wireless and functions as an interface between the mobile phone 400 and the CPU 401. The communication I / F 414 is further connected to a communication network such as a mobile phone network or the Internet via a radio, and also functions as an interface between the communication network and the CPU 401.

  The GPS unit 415 receives radio waves from GPS satellites and outputs information indicating the current position of the mobile phone 400. The output information of the GPS unit 415 is used when the CPU 401 calculates the current position of the mobile phone 400 together with output values of various sensors 416 described later. The information indicating the current position is information for specifying one point on the map information such as latitude / longitude and altitude.

  The various sensors 416 output information for determining the position and behavior of the mobile phone 400 such as a speed sensor, an acceleration sensor, and an angular velocity sensor. The output values of the various sensors 416 are used by the CPU 401 to calculate the current position of the mobile phone 400 and to calculate the amount of change in speed and direction.

  The camera 417 captures an image of the projection object. Specifically, the camera 417 captures an image of the projection object so as to include all map information projected onto the projection object by a projector 418 described later. The image may be either a still image or a moving image. For example, the camera 417 captures the moving direction and amount of the projection surface of the projection object, and the captured image is recorded on the magnetic disk 405 or the memory card 407 via the image I / F 412. It may be output to a recording medium such as The video output to the recording medium is overwritten and stored. The camera 417 may be provided in a projector 418 described later.

  The projector 418 projects map information on the projection object. Specifically, the projector 418 includes, for example, a light source system for projecting map information onto a projection object and an optical system for enlarging the projected map information. The optical system may have an autofocus function for automatically adjusting the focus of the map information projected on the projection object, and a zoom function for changing the size of the projected map information. Further, the map information projected from the projector 418 has a variable projection area projected onto the projection object depending on the zoom function of the projector 418 and the distance between the projector 418 and the projection object.

  The display unit 101, the projection unit 102, the projection area detection unit 103, the imaging unit 104, the distance detection unit 105, the acquisition unit 106, the projection control unit 107, and the selection unit included in the control device 110 included in the projection apparatus 100 illustrated in FIG. 111, the image processing unit 112, and the transmission unit 113, the CPU 401 uses the programs and data recorded in the ROM 402, the RAM 403, the magnetic disk 405, the memory card 407, etc. in the mobile phone 400 shown in FIG. The function is executed by controlling each part in the mobile phone 400.

  That is, the mobile phone 400 of the embodiment executes the control program and the projection program recorded in the ROM 402 as a recording medium in the mobile phone 400, thereby providing the functions of the control device and the projection device shown in FIG. The control processing procedure shown in FIG. 2 and the projection processing procedure shown in FIG. 3 can be executed.

(Contents of mobile phone processing)
Next, the processing contents of the mobile phone 400 will be described. FIG. 5 is a flowchart showing the contents of processing of the mobile phone. In the flowchart of FIG. 5, first, the projector 418 waits until map information is projected onto the projection object (step S501: No loop).

  When the map information is projected on the projection object in step S501 (step S501: Yes), the projection object is included so as to include all the map information determined to be projected in step S501: Yes by the camera 417. The captured video is acquired (step S502). Further, the distance from the projector 418 to the projection object is acquired (step S503). In step S503, for example, it is obtained from a distance measuring unit used for the autofocus function of the projector 418.

  Then, based on the ratio of the map information in the projection object in the video acquired in step S502 and the distance to the projection object acquired in step S503, the projection area of the map information projected on the projection object is detected. (Step S504).

  Further, it is determined whether or not the projection surface has moved based on the image of the projection surface of the projection acquired in step S502 (step S505). If it is determined in step S505 that the projection plane has moved (step S505: Yes), the movement direction and movement amount of the projection plane are acquired (step S506). In step S506, specifically, for example, the movement direction and the movement amount are acquired from acceleration sensors included in the various sensors 416.

  Next, by executing the image information selection processing program, one piece of map information from the map information group based on the projection area detected in step S504 and the movement direction and movement amount of the projection plane acquired in step S506. Is selected (step S507).

  On the other hand, if it is determined in step S505 that the projection plane has not moved (step S505: No), the process proceeds to step S507 as it is, and one of the map information groups is selected based on the projection area detected in step S504. Select map information.

  Next, the map information projected on the projection object by the projector 418 is changed from the map information determined to be projected on the projection object in step S501 to the map information selected in step S507 (step S508). Then, it is determined whether or not the projection of the map information by the projector 418 is stopped (step S509), and when the projection of the map information is stopped (step S509: Yes), the series of processes is ended as it is. On the other hand, if the projection of the map information is not stopped in step S509 (step S509: No), the process returns to step S502, and the subsequent processing is repeated.

  In the flowchart of FIG. 5, it is determined whether or not map information is projected on the projection object in step S501. However, the present invention is not limited to this. Specifically, for example, it may be determined whether or not the map information displayed on the display 413 is received from the user by the projector 418. If a setting for projection by the projector 418 is received from the user, the process may proceed to step S502.

  In the flowchart of FIG. 5, it is assumed that the object to be photographed is photographed in step S502, but the present invention is not limited to this. Specifically, for example, in step S502, information regarding the magnification of the zoom function of the projector 418 may be acquired. In this case, in step S504, the projection area of the map information projected on the projection object is detected based on the information regarding the magnification of the zoom function and the distance to the projection object detected in step S503. Also good. Note that when the optical system included in the projector 418 is a single focal point, the projection area is proportional to the distance to the projection object, and thus step S502 may be omitted.

  In the flowchart of FIG. 5, in step S504, based on the ratio of the map information in the projection object in the video acquired in step S502 and the distance to the projection object acquired in step S503, the projection object However, the present invention is not limited to this. Specifically, for example, step S502 and step S503 may be omitted, and only information regarding the projection area may be acquired from the projector 418 or the like.

(About image information selection processing)
The details of the process of selecting one piece of map information from the map information group in step S507 in the flowchart of FIG. 5 will be described in detail with reference to FIGS. FIG. 6 is a chart showing map information according to the projected area in the map information group. The projected area is the area of the map information projected on the projection object. In this embodiment, the projection surface is rectangular. The projection distance is a distance from the projector 418 to the projection object.

  The projection distance is acquired from the projector 418, for example. Note that the projection area is proportional to the distance to the projection object when the optical system of the projector 418 is a single focal point. The geographical range is a geographical range projected on the projection object in the map information of an arbitrary scale.

  The map information group includes map information with different scales (or scale levels and scale scales). In the map information group, map information of an optimal scale is recorded according to the projection area (projection distance). Further, the geographical range of the projected map information may be different depending on the projected area.

  The correspondence relationship shown in FIG. 6 is an example, and can be changed at any time.

  Prior to detailed description of an example to which the present invention is applied, in order to facilitate understanding of the present invention, first, a user carries various functions using FIGS. 7-1 to 7-3. Map information used to display a map on a display (liquid crystal display, organic EL display, etc.) having an internal display screen provided in a mobile terminal device provided for use, and provided or attached to the mobile terminal device An example in which the map information used for projecting a map on a projection surface, which is an external display screen, by the projector is the same will be described. FIGS. 7A to 7C are explanatory diagrams illustrating an example in which the map information displayed on the mobile phone and the projection surface is the same. In the example shown in FIG. 7A to FIG. 7C, the display resolution of the display having the internal display screen provided in the mobile terminal device and the projection resolution of the projector provided or attached to the mobile terminal device are: It shall be the same. For example, when the display is a liquid crystal display and the projector is a liquid crystal projector, the resolution of the liquid crystal panel included in the liquid crystal display is the same as the resolution of the liquid crystal panel included in the liquid crystal projector.

  Specifically, this will be described with reference to FIGS. 7-1 and 7-2. The map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1 of the display 413 built in the mobile phone (mobile terminal device) 400 is the specific geography of the map data D1 for the scale X1. When the map data DG1 corresponds to the target range G1, the projection having the area S1 on the projection object 700 formed by the projection light P from the projector 418 provided in the mobile phone 400 using the map data DG1. The map MP is displayed on the surface 701 (that is, the external display screen). In the example shown in FIG. 7A, the external shape and area of the internal display screen 413D of the display 413 are the same as the external shape and area of the projection surface 701 that is the external display screen, and the area of any screen is S1. is there. Therefore, as described above, if the display 413 is a liquid crystal display and the projector 418 is a liquid crystal projector, the resolution of the liquid crystal panel included in the display 413 and the resolution of the liquid crystal panel included in the projector 418 are the same. The map MP displayed on the surface 701 is recognized as a map that is substantially the same as the map M1 displayed on the internal display screen 413D when the user sees the map MP.

  In FIG. 7-3, a projection plane which is an external display screen having an area S2 larger than the area S1, using the map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1, that is, the map data DG1. An example of a case where a map M2 is displayed in 702 will be described. In the example shown in FIG. 7C, the external shape of the internal display screen 413D of the display 413 is similar to the external shape of the projection surface 702 that is the external display screen, but the size relationship between the areas S1 and S2 is as follows. There is a relationship of S1 <S2. Thereby, the map M2 displayed on the projection plane 702 is a blurry map with a rough description obtained by simply enlarging the map M1 displayed on the internal display screen 413D as an image when the user views it. Be recognized.

  Next, the case where the map information projected on the mobile phone and the projection plane is different will be described with reference to FIGS. FIGS. 8A to 8C are explanatory diagrams illustrating an example in which the map information displayed on the mobile phone and the projection surface is different. In FIG. 8A, as an example to which the present invention is applied, map information used for displaying a map on a display having an internal display screen, and a map used for projecting a map on a projection plane which is an external display screen by a projector. An example when the information is different will be described. Specifically, the map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1 is the map data DG1 corresponding to the specific geographical range G1 in the map data D1 for the scale X1. Sometimes (see FIG. 7-2), the map information used for projecting the map onto the projection plane 801 having the area S2 larger than the area S1 is larger than the geographical range G1 in the map data D1 for the scale X1, and A map M3 is projected on the projection plane 801 using map data DG2 corresponding to the geographical range G2 including the range G1 in the center. As a result, the map M3 displayed on the projection plane 801 has a geographical range G1 of the map M1 displayed on the internal display screen 413D included in the center of the projection plane 801 when viewed by the user. It is recognized as a map M3 indicating the range G2.

  In the example shown in FIG. 8A, the projection resolution on the partial projection plane 801a onto which the geographical range of the map M1 displayed on the internal display screen 413D is projected is equal to the display resolution on the internal display screen 413D of the display 413. Alternatively, it is assumed that the projection resolution on the partial projection plane 801a is larger than the display resolution on the internal display screen 413D. In this case, the map displayed on the partial projection plane 801a is recognized as a map that is substantially the same as the map M1 displayed on the internal display screen 413D when viewed by the user. In the example shown in FIG. 8A, when the resolution of the liquid crystal panel included in the display 413 and the resolution of the liquid crystal panel included in the projector 418 are the same, the projector 418 maps the map data to the liquid crystal panel of the projector 418. When the supply has a data thinning function, the map displayed on the partial projection plane 801a is blurred as compared with the map M1 displayed on the internal display screen 413D when viewed by the user. It is recognized as a map.

  A specific example will be described. In the description of this specific example, the projection resolution on the partial projection plane 801a onto which the geographical range of the map displayed on the internal display screen 413D is projected is equal to the display resolution on the internal display screen 413D, or Assume that the projection resolution on the partial projection plane 801a is larger than the display resolution on the internal display screen.

  First, for example, it is assumed that a 300 m × 450 m geographical range of map information having a scale of 1/1500 is displayed on the internal display screen 413D of the display 413 provided in the mobile phone 400. When this map information is projected onto the projection object, for example, when the projection area is 100 cm × 150 cm, the same map as the map displayed on the internal display screen 413D of the display 413 is displayed as in the example shown in FIG. Project. Therefore, map information having the same scale as the map displayed on the internal display screen 413D of the display 413 is projected onto the projection plane in the same geographical range.

  Then, when the projected area is changed from 100 cm × 150 cm to 120 cm × 180 cm, based on the table shown in FIG. 6, the map information whose scale is 1/1500 as in the example shown in FIG. To widen only the geographical range. Therefore, map information on the same scale as the display 413 is projected on the projection plane in a different geographical range. That is, map information in a geographical range wider than the geographical range displayed on the internal display screen 413D of the display 413 is projected onto the projection plane.

  In FIG. 8-2, as another example to which the present invention is applied, to display the map information used for displaying the map on the display having the internal display screen and the map on the projection plane which is the external display screen by the projector. Another example when the map information to be used is different will be described. Specifically, if the map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1 is the map data DG1 corresponding to the specific geographical range G1 in the map data D1 for the scale X1. For example, as map information used for projecting a map onto the projection plane 801 having an area S2 larger than the area S1, the map information D2 is larger than the geographical range G1 in the map data D2 for the scale X2 (for the wide area side map) smaller than the scale X1. The map M4 is projected on the projection plane 801 using the map data DG3 corresponding to the geographic range G2 including the geographic range G1 in the center. As a result, the map M4 displayed on the projection plane 801 has a geographical range G1 of the map M1 displayed on the internal display screen 413D included in the center of the projection plane 801 when viewed by the user. It is recognized as a map M4 showing the range G2. When the user views this map M4 displayed on the projection plane 801, the map M4 is recognized as a blurred map with a rougher depiction than the map M1 displayed on the internal display screen 413D.

  As an example of an information providing service that can use the display function as shown in the examples shown in FIGS. 8-1 and FIG. 8-2, for example, a user accesses a map providing service site and determines the current location of the user. There is an information providing service that provides a simple map display function of displaying a central map. In this service, when a user is displaying a map on the display of a mobile phone, if the projector projects light on a wall near the user for map projection, the projector will respond according to the projected area. Determining a geographical range of the projected map and projecting a map of the determined geographical range.

  In FIG. 8-3, as an example to which the present invention is applied, which is different from FIGS. 8-1 and 8-2, map information used for displaying a map on a display having an internal display screen and an external display by a projector. Another example in the case where the map information used for projecting the map on the projection plane which is the display screen is different will be described. Specifically, if the map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1 is the map data DG1 corresponding to the specific geographical range G1 in the map data D1 for the scale X1. For example, as the map information used for projecting the map on the projection plane 801 having the area S2 larger than the area S1, the geographical data of the map data D3 for the scale X3 (for the narrow area side or the detailed side map) larger than the scale X1 is used. A map M5 is displayed on the projection plane 801 using the map data DG4 corresponding to the range G1. As a result, the map M5 displayed on the projection plane 801 is recognized as a map M5 indicating the geographical range G1 of the map M1 displayed on the internal display screen 413D when the user views it. The map M5 displayed on the projection plane 801 is more descriptive of the number and shape of roads, houses, and the like than the map M1 displayed on the internal display screen 413D when the user views it. Recognized as a fine map.

  As an example of an information providing service that can use the display function as shown in the example shown in FIG. 8-3, for example, when a user accesses a map providing service site, There is an information providing service that provides a peripheral guidance function of guiding and displaying facilities. In this service, when a user is displaying a map on the display of a mobile phone, if the projector projects light on a wall near the user for map projection, the projector will respond according to the projected area. , Determine the details of the facilities included in the projected map, and project a map that contains information related to the facilities (for example, the house shape of the facility or the road near the facility) based on the determined details To do.

  Furthermore, another example in which the map information projected on the mobile phone and the projection surface is different will be described with reference to FIG. FIG. 9 is an explanatory diagram showing another example when the map information displayed on the mobile phone and the projection surface is different. In FIG. 9, as an example to which the present invention is applied, map information used for displaying a map on a display having an internal display screen, and map information used for projecting a map on a projection plane which is an external display screen by a projector, However, an example of a different case will be described. Specifically, the map information MD1 used for displaying the map M1 on the internal display screen 413D having the area S1 is the map data DG1 corresponding to the specific geographical range G1 in the map data D1 for the scale X1. Sometimes (see FIG. 7-2), as map information used for projecting a map onto a projection plane 901 having an area S2 larger than the area S1, map data D4 for a scale X4 smaller than the scale X1 (for a wide area side map) The map M6 is projected on the projection plane 901 using the map data DG5 corresponding to the geographic range G5 that is wider than the geographic range G1 and includes the geographic range G1 at the center.

  As a result, the map M6 displayed on the projection plane 901 has a geographical range G1 of the map M1 displayed on the internal display screen 413D included in the center of the projection plane 901 when viewed by the user. It is recognized as a map M6 indicating the range G5. The map M6 displayed on the projection plane 901 is a display indicating that a specific place name, a specific facility, or the like has high importance, that is, a map note is different from a map note indicating another place name or facility. In this example, it is displayed in a display mode using bold characters with large dimensions. Therefore, when the user views the map M6, the map note 902 with higher importance is recognized as a map that is easier to see than the map M1 displayed on the internal display screen 413D.

  A specific example will be described. In the description of this specific example, the projection resolution on the partial projection plane onto which the geographical range of the map displayed on the internal display screen 413D is projected is equal to the display resolution on the internal display screen 413D, or Assume that the projection resolution on the projection plane is larger than the display resolution on the internal display screen.

  First, for example, it is assumed that a 50 m × 75 m geographical range is displayed on the internal display screen 413D of the display 413 provided in the mobile phone 400, out of the map information with a scale of 1/6250. When this map information is projected onto the projection object, for example, when the projection area is 30 cm × 45 cm, the same map as the map displayed on the internal display screen 413D of the display 413 is displayed as in the example shown in FIG. Project. Therefore, map information having the same scale as the map displayed on the internal display screen 413D of the display 413 is projected onto the projection plane in the same geographical range.

  Then, when the projected area is changed from 30 cm × 45 cm to 100 cm × 150 cm, based on the table shown in FIG. 6, as shown in FIG. Is also widened from 50 m x 75 m to 300 m x 450 m. Furthermore, in the map information projected on the projection plane 901, the map note 902 with high importance is displayed in an enlarged display mode. Therefore, map information of a scale different from that of the display 413 is projected on the projection plane 901 in a different geographical range, and the map note 902 having high importance among the map notes is displayed on the projection plane in an enlarged display mode. The

  Next, a function for changing the map information displayed on the projection plane will be described. FIG. 10 is an explanatory diagram showing a function for changing the map information displayed on the projection plane. In FIG. 10, the function of changing the geographical range without changing the distance from the projector to the projection plane, that is, without changing the area of the projection plane will be described. For example, as shown in FIG. 8A, when the map M3 is projected on the projection plane 801, the operation of narrowing the geographic range from the user without changing the distance L1 from the projector 418 to the projection plane 801 is performed. When the input is accepted, as map information used for projecting a map on the projection plane 1001 as shown in FIG. 10, the map data is changed from the map data DG2, and for the scale X3 larger than the scale X1 (for the narrow area side or the detailed side map) The map M7 is projected on the projection plane 1001 using the map data DG6 corresponding to the geographic range G3 narrower than the geographic range G2 in the map data D3. As a result, when the user views the map M7 displayed on the projection plane 1001, the map M3 has the same projected area as the map M3 and is recognized as a map M7 having a narrower geographical range than the map M3.

  At this time, the geographical range of the map displayed on the internal display screen 413D may be narrower than the map M1, or may not be changed from the map M1. In this way, the geographical range of the map can be changed without changing the distance from the projector 418 to the projection plane and without changing the projection area of the map projected on the projection plane. Therefore, the user can view a more detailed map or a wider range of map without changing the place where the projector 418 projects the map.

  FIGS. 11A and 11B are explanatory diagrams illustrating other changing functions of the map information displayed on the projection plane. In FIG. 11A, a case where the area of the projection plane is changed by changing the distance from the projector to the projection plane will be described. For example, as shown in FIG. 8A, when the map M3 is projected on the projection plane 801, when the distance from the projector 418 to the projection plane 801 is changed to the distance L2 shorter than the distance L1, the projection area is larger than the area S2. A narrow area S3 is obtained. Then, as shown in FIG. 11A, the map information used for projecting the map on the projection plane 1101 is changed from the map data DG2, and is smaller than the geographical range G2 in the map data D1 for the scale X1. A map M8 is displayed on the projection plane 1101 using the map data DG7 corresponding to the target range G6. Here, the geographical range G6 may be changed as needed according to the distance L2 from the projector 418 to the projection plane 1101. Further, on the map M8, when the distance from the projector 418 to the projection plane 1101 is equal to or less than a predetermined distance, a button 1102 indicating a point associated with personal information or the like is superimposed and displayed. Here, the distance equal to or less than the predetermined distance is a distance that a person other than the user cannot easily view the projection plane, for example, a projection distance in the case where the projection surface is the surface of the book that the user has in hand. . Also, as personal information, information related to the user (eg name, age, address, etc.), search conditions specified by the user, facility genre specified by the user, various information specified by the user, There is past history information. In this way, it is possible to change the geographical range of the map displayed on the projection plane only by changing the distance from the projector 418 to the projection plane. Therefore, the user can see a map that matches the projected area.

  As shown in FIG. 11B, when any button 1102 is selected by the user while the button 1102 is displayed, information 1103 corresponding to each button 1102 is displayed on the map. . Specifically, when the displayed button 1102 is, for example, a restaurant facility used by the user in the past, for example, when the fifth button 1102 is selected, the information corresponds to the fifth button 1102. “French ○ ● △ ▲” information is displayed. As described above, even if personal information is included in the information corresponding to the button 1102, for example, if the surface of the book obtained by the user is the projection plane 1101, the map and the information on the map are at hand of the user. Since only the information is displayed, it is possible to prevent a third party from seeing personal information.

  Furthermore, when the distance from the projector 418 to the projection plane 1101 is returned to the distance L1, the geographical range may be returned to G2, and the map M3 shown in FIG. 8-1 may be displayed, or as shown in FIG. A map M7 is displayed using map data DG6 corresponding to a geographic range G3 narrower than the geographic range G2 among the map data D3 for the scale X3 (for the narrow area side or the detailed side map) larger than the scale X1. Also good. In any case, when the distance from the projector 418 to the projection plane 1101 is longer than the predetermined distance, a button indicating a point associated with personal information or the like is not displayed. In this way, when the projection plane is relatively far from the user and there is a possibility that the third party can see the projection plane, the third party can see the personal information by not displaying the button 1102. Can be prevented.

  In this embodiment, the image information is map information, but the present invention is not limited to this. Specifically, for example, an image information group in which different display forms are collected or an image information group to which arbitrary information such as user specific information is added may be used. In this embodiment, the projection surface is rectangular, but the present invention is not limited to this. Specifically, for example, a circular shape may be used.

  According to the mobile phone 400 of the above-described embodiment, when the map information displayed on the display 413 is projected onto the projection object by the projector 418, the map information to be projected according to the projection area of the map information on the projection object. Can be changed. Specifically, as the projected area is larger, map information with a large amount of information such as map information with a large scale, map information with a wide geographical range, or a city map can be projected. . Therefore, image information corresponding to the projection area or projection distance can be projected onto the projection object. As a result, the user can change the map information displayed on the display 413 of the mobile phone 400, for example, to map information having a large scale, a wide geographical range, or a large amount of information related to details, for example. Can be confirmed. Further, for example, while the map information displayed on the display 413 of the mobile phone 400 is displayed, the user has a large amount of information related to, for example, a larger scale, a wider geographic range, or more details than the map information. By projecting map information, different map information can be confirmed simultaneously.

  As described above, according to the control device, the projection device, the control method, the projection method, the control program, the projection program, and the recording medium of the present invention, according to the projection area when projecting the image information on the projection object, The image information to be projected can be changed.

  The control method and projection method described in this embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

DESCRIPTION OF SYMBOLS 100 Projection apparatus 101 Display part 102 Projection part 103 Projection area detection part 104 Imaging | photography part 105 Distance detection part 106 Acquisition part 107 Projection control part 110 Control apparatus 111 Selection part 112 Image processing part 113 Transmission part

Claims (16)

Selection means for selecting one piece of image information from an image information group including image information set to be projected by a user based on information on a projection area when projecting image information onto a projection object; ,
Transmitting means for transmitting one piece of image information selected by the selecting means to a projection device that projects the image information onto the projection object;
A control device comprising:   The control device according to claim 1, wherein the selection unit selects the image information having a larger scale as the projection area when projecting the image information onto the projection object is larger.   The control device according to claim 1, wherein the selection unit selects image information having a larger display range as a projection area when projecting image information onto the projection object is larger.   The said selection means selects image information with much information amount, so that the projection area when projecting image information on the said projection object is large, The selection of any one of Claims 1-3 characterized by the above-mentioned. The control device described.   The said selection means selects one image information from the said image information group based on the information regarding the moving direction and moving amount of the projection surface in the said to-be-projected object, The any one of Claims 1-4 characterized by the above-mentioned. The control apparatus as described in any one.   The image processing unit according to claim 1, further comprising an image processing unit that removes the unique information of the user from the image information when a projection area when projecting the image information onto the projection object is a predetermined value or more. The control device according to any one of the above.   Image processing for increasing the character information having a predetermined importance or higher as the projection area when projecting the image information on the projection object is larger based on information on the importance of the character information included in the image information The control device according to claim 1, further comprising means.   The control apparatus according to claim 1, wherein the image information group is map information classified for each scale. A projection apparatus comprising the control apparatus according to claim 1,
Projection means for projecting one piece of image information in the image information group onto the projection object;
A projection area detecting means for detecting a projection area of the image information projected onto the projection object by the projection means;
Acquisition means for acquiring, from the control device, one image information corresponding to the projection area detected by the projection area detection means in the image information group;
Projection control means for changing the image information projected onto the projection object by the projection means into image information obtained by the obtaining means;
A projection apparatus comprising: The projected area detecting means includes
Photographing means for photographing the projection object so as to include all the image information projected on the projection object;
Distance detecting means for detecting a distance to the projection object;
With
Projection of the image information projected on the projection object based on the ratio of the image information in the projection object photographed by the photographing unit and the distance to the projection object detected by the distance detection unit The projection apparatus according to claim 9, wherein an area is detected.   The projection control unit changes the image information projected onto the projection object by the projection unit to the image information acquired by the acquisition unit, and controls the display unit to change the image before the change. 11. The projection apparatus according to claim 9, wherein information is displayed. A control method in a control device, comprising:
A selection step of selecting one piece of image information from an image information group including image information set to be projected by a user based on information about a projection area when projecting image information onto a projection object; ,
Transmitting the image information selected by the selection step to a projection device that projects the image information on the projection;
The control method characterized by including. A projection method in a projection device comprising the control device according to claim 1,
A projection area detecting step of detecting a projection area of the image information projected onto the projection by a projection unit that projects one piece of image information in the image information group onto the projection;
An acquisition step of acquiring, from the control device, one image information corresponding to the projection area detected by the projection area detection step in the image information group;
A projection control step of changing the image information projected onto the projection object by the projection unit into the image information acquired by the acquisition step;
A projection method comprising:   A control program for causing a computer to execute the control method according to claim 12.   A projection program causing a computer to execute the projection method according to claim 13.   15. A computer-readable recording medium on which the control program according to claim 14 or the projection program according to claim 15 is recorded.

Images