JP2017198945A - Projection device, method for controlling projection device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To project information indicating the position of a communication part included in a screen even when the position or range of an image projected by a projection device varies.SOLUTION: A projection device comprises: projection means that projects an image on a screen; first acquisition means that acquires arrangement information indicating the position of a communication part included in the screen; second acquisition means that acquires position information indicating the position or range of the image projected by the projection part on the screen; and control means that causes the projection means to project an image having the information indicating the position of the communication part combined therewith on the basis of the arrangement information acquired by the first acquisition means and the position information acquired by the second acquisition means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection apparatus that projects an image on a screen having a communication unit.

  In recent years, near field communication such as NFC (Near Field Communication) has been widely used. Patent Document 1 describes a technique in which a plurality of proximity wireless communication reader / writers are arranged on a screen which is a projection surface from a projector. Further, the projector disclosed in Patent Document 1 projects information indicating content communicated by proximity wireless communication for each area where a reader / writer is arranged.

JP 2008-281777 A

  In the technique described in Patent Document 1, in order to correctly project information for each area where a reader / writer as a communication unit is arranged, the distance between the projector and the screen and the projection magnification must be fixed. That is, in the technique described in Patent Document 1, when the distance between the projector and the screen and the projection magnification vary, or when the position and range of the image projected by the projector vary, information is provided for each area where the reader / writer is arranged. May not be displayed correctly.

  The present invention has been made in view of the above-described problems, and projects information indicating the position of a communication unit included in a screen even when the position or range of an image projected by a projection apparatus varies.

  The projection apparatus of the present invention includes a projection unit that projects an image on a screen, a first acquisition unit that acquires arrangement information indicating a position of a communication unit included in the screen, and an image projected by the projection unit in the screen. Based on the second acquisition means for acquiring position information indicating a position or range, the arrangement information acquired by the first acquisition means, and the position information acquired by the second acquisition means, the communication unit Control means for projecting an image obtained by synthesizing information indicating the location of the image on the projection means.

  According to the present invention, it is possible to project information indicating the position of the communication unit included in the screen even when the position or range of the image projected by the projection apparatus varies.

It is a figure which shows the structure of a display system. It is a figure which shows the processing sequence of a display system. It is a figure which shows the external appearance of a display system. It is a figure which shows a screen. It is a figure which shows the position adjustment of the image projected on the screen. It is a figure which shows the display of the information for personal authentication. It is a figure which shows the display for content selection. It is a figure which shows the position of a screen and a projection image. It is a figure which shows the display which performs screen selection.

  FIG. 1 shows a configuration of a display system in the present embodiment. The display system includes a screen 110 for projecting an image and a projector 120 that is a projection device for projecting an image. The screen 110 includes NFC reader / writers 111, 112, and 113. NFC reader / writers 111, 112, and 113 are NFC reader / writers arranged on the back surface of the screen 110, and are communication units that perform NFC-compliant communication. The screen 110 includes a control signal generation unit 114 that generates information for notifying the projector 120 of information acquired by communication of the NFC reader / writers 111, 112, and 113.

  The projector 120 includes an NFC display setting unit 121 for setting whether or not to display the NFC guide display positions indicating the positions of the NFC reader / writers 111, 112, and 113 on the projected image on the screen 110. Reference numeral 122 denotes an NFC display control unit for controlling an image indicating the NFC guide display position in accordance with the setting of the NFC display setting unit 121. Reference numeral 123 denotes an imaging unit for capturing the screen 110 and a projected image on the screen 110. A captured image analysis unit 124 analyzes an image captured by the image capturing unit 123 and grasps a relative position between the screen and the projection image. Reference numeral 125 denotes a screen information setting unit for setting screen-specific information including arrangement information where the NFC reader / writers 111, 112, and 113 in the screen 110 are arranged. An NFC guide display data generation unit 126 generates an image of the NFC guide display position indicating the positions of the NFC reader / writers 111, 112, and 113 based on information from the captured image analysis unit 124 and the screen information setting unit 125. . A content data holding unit 127 holds an image projected by the projector 120. A projection image combining unit 128 combines the content image from the content data holding unit 127 and the NFC guide display image from the NFC guide display data generation unit 126 based on the control signal from the NFC display control unit 122 and combines the projection images. It is. Reference numeral 129 denotes a projection unit for projecting the projection image output from the projection image synthesis unit 128.

  FIG. 3 is a diagram showing the appearance of the display system in the present embodiment. NFC reader / writers 111, 112, and 113 are arranged on a screen 110 on which the projector 120 projects an image. Proximity wireless communication is started when the portable information terminal 150 and any one of the NFC reader / writers 111, 112, and 113 come close to each other. For example, when the NFC reader / writer 111 and the portable information terminal 150 come close to each other, the portable information terminal 150 transmits the personal authentication information stored in the portable information terminal 150 to the NFC reader / writer 111. In this case, the screen 110 notifies the projector 120 that the portable information terminal 150 has selected the NFC reader / writer 111 as a communication partner. The projector 120 can switch the content to be projected by receiving this notification.

  FIG. 4 is a diagram showing the screen 110. On the screen 110, NFC reader / writers 111, 112, and 113 are arranged. Further, the screen 110 is provided with an identification symbol 115 for identifying the screen 110. The identification symbol 115 may be a marker or a character string.

  The operation of the display system having the above configuration will be described. FIG. 2 is a diagram illustrating a processing sequence of the display system. In step S201, the screen information setting unit 125 of the projector 120 sets screen information. The screen information setting unit 125 of the projector 120 acquires arrangement information indicating the positions of the NFC reader / writers 111, 112, and 113 in the screen. Further, the screen information setting unit 125 acquires information indicating the identification symbol 115 of the screen 110 and the position of the identification symbol 115 of the screen. The screen information setting unit 125 may acquire such information by input from the user, may acquire information stored in advance in the storage device, or may acquire it from the screen 110. The arrangement information of the NFC reader / writers 111, 112 and 113 and the information indicating the position of the screen identification symbol 115 are, for example, information indicating the position coordinates and size in the screen.

  In step S202, the projector 120 selects a screen to be projected. In S <b> 202, the imaging unit 123 images the screen 110 and outputs the captured image to the captured image analysis unit 124. The captured image analysis unit 124 identifies the screen from the screen identification symbol detected by analyzing the captured image based on the information regarding the screen identification symbol acquired from the screen information setting unit 125. Then, the NFC reader / writer arrangement information of the specified screen is output to the NFC guide display data generation unit 126. The screen information setting unit 125 of the projector 120 may select a screen to be used based on a user operation from a list of screens in which the arrangement information of the NFC reader / writer is registered. FIG. 9 is a display example of a list of screens projected by the projector 120. If, for example, the screen SB 1121 is selected from the displayed list of screens, the screen information setting unit 125 outputs the NFC reader / writer arrangement information of the screen SB 1121 to the NFC guide display data generation unit 126.

  In step S <b> 203, the projector 120 adjusts the display position of the projection image on the screen 110. FIG. 5 is a diagram showing the adjustment of the display position of the projection image 116 with respect to the screen 110. The projected image 116 is in the screen 110 and needs to include the NFC reader / writers 111, 112, and 113. Therefore, the projector 120 performs control to project the center of the projection image 116 near the center of the screen 110. Further, it is desirable that the identification symbol 115 on the screen 110 be outside the projection image 116 so as not to overlap the projection image 116. Therefore, the projector 120 controls the projection so that the projection image 116 and the identification symbol 115 do not overlap.

The captured image analysis unit 124 detects the projectable range of the screen 110 from the captured image input from the imaging unit 123, and calculates a shift amount between the center of the projected image 116 and the center of the projectable range of the screen 110. Then, the captured image analysis unit 124 outputs the shift amount of the projection image to the projection unit 129. The projection unit 129 projects the projection image 116 while shifting it by the input shift amount.
Note that the position adjustment of the projected image 116 may be performed by physically moving the screen 110 or the projector 120.

  After the position adjustment of the projection image 116, the imaging unit 123 captures the screen 110 and the projection image 116 in S204, and outputs the captured image to the captured image analysis unit 124. The captured image analysis unit 124 calculates relative position information of the projection image 116 with respect to the screen 110 from the captured image output by the imaging unit 123. The relative position information is information indicating the position or range of the projection image 116 on the screen 110. Note that the projector 120 may acquire the relative position information of the projection image 116 with respect to the screen 110 from the distance and the projection magnification input by the user. The NFC guide display data generation unit 126 determines the NFC guide display position and region for the projection image 116 from the relative position information and the arrangement information of the NFC reader / writers 111, 112, and 113 of the screen selected in S202.

  Next, the projector 120 performs ON / OFF setting of the NFC guide display in S205. The NFC display setting unit 121 determines whether to display the NFC guide display. Further, the NFC display setting unit 121 determines whether the NFC guide display is always displayed, only when there is an input request from the NFC reader / writer 111, 112, or 113, or not always displayed. The setting in S205 is performed according to a user operation. The NFC display setting unit 121 outputs the NFC display setting to the NFC display control unit 122, and the NFC display control unit 122 outputs a control signal to the projection image synthesis unit 128.

  In step S206, the content data holding unit 127 of the projector 120 acquires content data to be projected. The content data holding unit 127 outputs the content data to be projected to the projection image synthesis unit 128.

  In step S <b> 207, the projection image synthesis unit 128 synthesizes the projection image to be projected on the screen 110. When the control signal for determining the display of the NFC guide is received from the NFC display control unit 122, the projection image synthesis unit 128 displays the content data acquired from the content data holding unit 127 and the NFC guide display from the NFC guide display data generation unit 126. Combining with data. The projection image combining unit 128 determines whether or not to display the NFC guide display data aligned with the projection image, based on the control signal from the NFC display control unit 122. The projection image synthesis unit 128 synthesizes the NFC guide display data having the designated size at the position designated by the NFC guide display data generation unit 126 on the content data. The projection image synthesis unit 128 outputs the synthesized data to the projection unit 129. Here, the NFC guide display data is data indicating that personal authentication is performed as shown in FIG.

  In S <b> 208, the projection unit 129 projects a projection image in which the content data and the NFC guide display data are combined onto the screen 110. Assume that the user brings the portable information terminal 150 close to the NFC reader / writer 111 in accordance with the NFC guide display data displayed on the screen 110 in S209. The portable information terminal 150 transmits personal authentication information for personal authentication to the NFC reader / writer 111.

  In S <b> 210, the control signal generation unit 114 of the screen 110 transfers the personal authentication information from the portable information terminal 150 acquired via the NFC reader / writer 111 to the projector 120. In step S <b> 211, the personal information management unit 131 of the projector 120 collates the personal authentication information of the portable information terminal 150 received from the screen 110 with the information stored in advance in the personal information storage unit 130. The personal information management unit 131 authenticates the user of the portable information terminal 150 based on the collation result. Also, the personal information management unit 131 outputs information on the access authority to the content data of the user of the portable information terminal 150 according to the authentication result to the content data holding unit 127.

  In step S <b> 212, the content data holding unit 127 outputs NFC guide display data corresponding to information on access authority to the acquired content data to the projection image combining unit 128. The projection image combining unit 128 combines the newly acquired NFC guide display data with the content data. Here, as shown in FIG. 7, NFC guide display data for selecting content to be displayed is synthesized. FIG. 7 shows that file name A is projected when communication with the NFC reader / writer 111 is started. In FIG. 7, when communication with the NFC reader / writer 112 is started, the file name B is projected. FIG. 7 shows that the file name C is projected when communication with the NFC reader / writer 113 is started. Here, the file names A, B, and C are content data that the user of the portable information terminal 150 has access rights to.

  In step S <b> 213, the projection unit 129 projects a projection image in which the content data and the content selection NFC guide display data are combined onto the screen 110. In S214, it is assumed that the user brings the portable information terminal 150 close to the NFC reader / writer 112 from the screen 110. The NFC reader / writer 112 starts communication with the portable information terminal 150. The NFC reader / writer 112 notifies the control signal generation unit 114 that communication with the portable information terminal 150 has started.

  In S <b> 215, the control signal generation unit 114 transmits information indicating that the file B has been selected to the content data holding unit 127 based on the notification that the NFC reader / writer 112 has started communication. In step S <b> 216, the content data holding unit 127 selects the file B based on the information from the control signal generation unit 114 and outputs the file B to the projection image synthesis unit 128. In S <b> 217, the projection unit 129 projects the content data indicated by the file B onto the screen 110.

  As described above, the projector 120 can identify the screen 110 from the identification symbol by imaging and analyzing the screen 110 with the imaging unit 123. Further, the projector 120 acquires the position and range of the image projected on the screen 110 by imaging and analyzing the screen 110 with the imaging unit 123. Then, when specified, the projector 120 acquires the arrangement information of the NFC reader / writer corresponding to the screen 110. Based on the arrangement information of the NFC reader / writer and the position and range of the image projected on the screen 110, the projector 120 synthesizes and projects an NFC guide display indicating the position of the NFC reader / writer on the projected image. Thus, even when the position or range of the image projected by the projector 120 on the screen 110 varies, information indicating the position of the NFC reader / writer included in the screen 110 can be projected.

  Next, the case where the projection magnification is changed after the content data is displayed in S217 will be described. The user changes the projection magnification of the projector 120 in order to enlarge and display a part of the projection image displayed on the screen 110.

  In this case, the NFC guide display is also enlarged and displayed, and is shifted from the position on the screen where the NFC reader / writer is arranged. In addition, the NFC guide display also displays the size of the NFC reader / writer larger. FIG. 8 shows a display example of an image displayed on the screen 110 after changing the projection magnification. In FIG. 8A, 710 indicates a projected image, and 711 to 713 indicate NFC guide displays.

The imaging unit 123 captures the screen 110 after projecting the image after changing the projection magnification. The captured image analysis unit 124 calculates relative position information of the projection image 710 with respect to the screen 110 from the captured image output by the imaging unit 123 and outputs the relative position information to the NFC guide display data generation unit 126. The NFC guide display data generation unit 126 determines the NFC guide display position for the projection image 710 from the relative position information and the arrangement information of the NFC reader / writers 111, 112, and 113. The projection unit 129 projects a combined image obtained by combining the NFC guide display with the determined display position and region. FIG. 8B is a display example when the NFC guide display is adjusted again after changing the projection magnification. As described above, even if the projection magnification is changed, the screen and the projection image are captured to display the NFC guide display. By correcting and recombining, it is possible to match the correct NFC arrangement.

(Other embodiments)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program It can also be realized by processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

110 Screen 111, 112, 113 NFC reader / writer 120 Projector

Claims (10)

A projection device,
Projection means for projecting an image on a screen;
First acquisition means for acquiring arrangement information indicating a position of a communication unit included in the screen;
Second acquisition means for acquiring position information indicating the position or range of the image projected by the projection means on the screen;
Based on the arrangement information acquired by the first acquisition unit and the position information acquired by the second acquisition unit, an image obtained by combining information indicating the position of the communication unit is projected on the projection unit. Control means;
A projection apparatus comprising:   The projection apparatus according to claim 1, wherein the communication unit is an NFC reader / writer.   The projection apparatus according to claim 1, wherein the second acquisition unit acquires the position information based on a captured image obtained by capturing the screen on which the projection unit projects an image.   The said 1st acquisition means acquires the said positional information corresponding to the identification symbol specified based on the picked-up image which image | photographed the said screen which the said projection means projected the image of Claim 1 thru | or 3 characterized by the above-mentioned. The projection device according to any one of the above.   The said control means changes the position and area | region which synthesize | combine the information which shows the position of the said communication part, when the projection magnification of the said projection means is changed. Projection device.   6. The projection according to claim 1, wherein the control unit causes the projection unit to project an image obtained by combining information indicating positions of a plurality of communication units included in the screen. apparatus.   The projection apparatus according to claim 1, wherein when the communication unit detects that the communication unit has started communication, the control unit switches an image to be projected on the projection unit.   7. The projection according to claim 1, wherein the control unit causes the projection unit to project content corresponding to an access right corresponding to the authentication information acquired via the communication unit. apparatus. A control method of a projection apparatus having a projection means for projecting an image on a screen,
A first acquisition step of acquiring arrangement information indicating a position of a communication unit included in the screen;
A second acquisition step of acquiring position information indicating a position or a range of the image projected by the projection unit on the screen;
Based on the arrangement information acquired in the first acquisition step and the position information acquired in the second acquisition step, an image obtained by combining information indicating the position of the communication unit is projected on the projection unit. Process,
A control method for a projection apparatus, comprising:   A program for causing a computer to execute the control method according to claim 9.

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