JP2012230653A - Presentation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a presentation device which can perform presentation without using an apparatus other than a laser pointer.SOLUTION: A presentation device 1 comprises: a PC 2 for controlling a display image to be projected on a screen 4; a laser pointer 9 for radiating a laser beam L1 and a laser beam L2; and a camera 6 for capturing the screen 4. The laser pointer 9 comprises a first operation button 10a, a second operation button 10b, and a third operation button 10c. A shape of the laser beam L2 radiated from the laser pointer 9 changes according to a button depressed among the first operation button 10a, the second operation button 10b and the third operation button 10c. Via the camera 6, the PC 2 recognizes the shape of the laser beam L2 radiated on the screen 4, and controls the display image based on the recognized shape of the laser beam L2.

Description

  The present invention relates to a presentation apparatus that supports a presentation performed using laser light.

2. Description of the Related Art Conventionally, presentations that explain various matters while projecting and recording images created and recorded by a personal computer on a screen have been widely performed.
In such a presentation, a laser beam composed of visible light is often used to indicate an arbitrary position of an image projected on a screen or an image displayed on a display.

  In recent years, an apparatus for newly displaying an image on a screen or a display according to a user's instruction during the presentation using such laser light has been developed. For example, in Patent Literature 1, an image projected on a screen is captured by a camera, a laser light irradiation position is detected from the captured image, and a new image is projected on a position equivalent to this position. An apparatus is described.

JP-A-9-325411

However, when a presentation is performed using the apparatus as described above, an instruction may be issued to project a new image to a location that is not intended by the user. In this case, the user has to erase a new image projected by mistake using a device other than the laser pointer such as a mouse or a keyboard.
When outputting a command such as page feed or page return, the user uses a laser pointer to point to an arbitrary position in the image, and uses an apparatus other than the laser pointer, such as a mouse or a keyboard, to output the image. It was necessary to output a command to

  Thus, conventionally, when giving a presentation, the user has to use a device other than the laser pointer together with the laser pointer.

  The present invention has been made to solve the above-described problems of the prior art, and provides a presentation device capable of controlling an image displayed on a display surface without performing complicated work when giving a presentation. The purpose is to do.

  A first aspect of the present invention is a control means for controlling a display image to be displayed on a display surface, a laser pointer for irradiating an instruction image on the display surface, and an image for recognizing the shape of the image displayed on the display surface A presentation device including a recognition unit, wherein the laser pointer includes a reception unit that receives a plurality of commands, and changes the instruction image into a different shape according to the command received by the reception unit, The control means controls the display image based on the shape of the instruction image recognized through the image recognition means.

  According to this configuration, the display image is controlled based on the shape of the instruction image emitted from the laser pointer. Therefore, the user can control the display image displayed on the display surface through the operation of the laser pointer, that is, without using a mouse or the like. Therefore, the user can control the display image displayed on the display surface without performing complicated work.

  A second aspect of the present invention is the presentation device according to the first aspect, wherein the control image is recognized when the instruction image is recognized through the image recognition means as corresponding to the first instruction among the plurality of instructions. The means controls the display image so as to draw a predetermined image at a position where the instruction image is indicated.

  According to this configuration, since the predetermined image is drawn at the position where the instruction image is irradiated, the user draws the predetermined image on the display surface by using the laser pointer without using the mouse or the like. Will be able to.

  A third aspect of the present invention is the presentation apparatus according to the first aspect or the second aspect, characterized in that image information output from the image recognition means is transmitted via a network.

  According to this configuration, an image controlled through operation of the laser pointer can be transmitted to a remote place.

  A fourth aspect of the present invention is the presentation device according to any one of the first aspect to the third aspect, wherein the instruction image is made of invisible light, and the image recognition unit is configured to perform the instruction based on the invisible light. It is characterized by recognizing images.

  According to this configuration, since the instruction image is made of invisible light, even if the instruction image is irradiated, no change occurs in the portion of the display image made of visible light. For this reason, it is possible to prevent the display image from becoming difficult to be seen when the instruction image is irradiated.

  A fifth aspect of the present invention is the presentation device according to any one of the first aspect to the fourth aspect, wherein the instruction image corresponds to a second instruction among the plurality of instructions through the image recognition means. When the display image is recognized, the display image is switched to a display image different from the currently displayed display image.

  According to this configuration, the user can switch the display image displayed on the display surface to a different display image by using the laser pointer without using a mouse or the like.

  A sixth aspect of the present invention is the presentation device according to any one of the first aspect to the fifth aspect, wherein when the instruction image corresponds to a third instruction among the plurality of instructions, the image recognition means is used. When recognized, the control means erases the display image in a predetermined range including a position where the instruction image is shown.

  According to this configuration, the user can erase the display image by using the laser point without using a mouse or the like.

  Further, the present invention provides a control unit that controls a projection image to be projected on a screen, a projection unit that projects the projection image on the screen based on image information of the projection image output from the control unit, A presentation device comprising a laser pointer for irradiating an instruction image on a screen and an image recognition means for recognizing the image on the screen, wherein the laser pointer comprises a receiving means for receiving a plurality of instructions, and the receiving means receives The instruction image is changed to a different shape in accordance with the command, and the control means controls the projection image based on the shape of the instruction image recognized through the image recognition means. Good.

  The presentation device according to any one of the first to fifth aspects, wherein after the instruction image is recognized through the image recognition means, recognition of the instruction image is prohibited for a predetermined range including the instruction image. It is preferable to use a presentation apparatus characterized by the above.

  ADVANTAGE OF THE INVENTION According to this invention, when giving a presentation, the presentation apparatus which can control the image displayed on a display surface without performing complicated work can be obtained.

1 is a schematic configuration diagram of a presentation apparatus according to an embodiment of the present invention. (A) is a schematic top view showing the external structure of the laser pointer according to this embodiment, (b) is a schematic cross-sectional view showing the internal structure of the laser pointer according to this embodiment, and (c) to (e). These are the schematic diagrams which show the shape of the laser beam L2 irradiated from the laser pointer concerning this embodiment. 1 is a block diagram showing a schematic configuration of an electrical configuration of a personal computer according to an embodiment. 6 is a flowchart showing a processing procedure of calibration processing according to the present embodiment. (A) is a schematic diagram of an image displayed on a slide image in the calibration processing according to the present embodiment, and (b) is a schematic diagram of an image displayed on a screen in the calibration processing according to the present embodiment. Figure. The flowchart which shows the process sequence of the display process concerning this embodiment. FIG. 3 is a schematic diagram illustrating a method for scanning a captured image according to the present embodiment. (A) is the shape of the laser beam L2 irradiated on the screen when the drawing mode is selected, (b) is the shape of the laser beam L2 irradiated on the screen when the command mode is selected, (c ) Is a schematic diagram showing the shape of the laser beam L2 irradiated on the screen when the erase mode is selected. 6 is a flowchart showing an image processing procedure for an image projected on a screen when a drawing mode is selected. The flowchart which shows the image processing procedure of the image projected on a screen, when command mode is selected. 6 is a flowchart showing an image processing procedure for an image projected on a screen when an erase mode is selected. The schematic diagram which shows the use condition of the presentation apparatus concerning this embodiment. The schematic block diagram of the presentation apparatus concerning other embodiment.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of the invention will be described below with reference to FIGS.
First, a presentation apparatus 1 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a schematic configuration of a presentation apparatus 1 according to an embodiment of the present invention.

  As shown in FIG. 1, a presentation apparatus 1 includes a camera 6 (corresponding to “image recognition means” of the present invention) and a PC (personal computer, “control means of the present invention” connected to the camera 6 and a network. And a “image recognition means” 2, a projector 3 connected to the PC 2, a screen 4 on which an image emitted from the projector 3 is projected, and a laser pointer 9. In the presentation apparatus 1, the image stored in the PC 2 is projected and displayed on the screen 4 (corresponding to the “display surface” of the present invention) according to the operation of the user 7. In the present invention, the image recognition means is configured using “camera 6” and “PC2”.

  Note that the connection method between the camera 6 and the PC 2 and the connection method between the PC 2 and the projector 3 are not particularly limited, and may be connected via a wired or wireless network, for example. Further, instead of the PC 2, another information terminal device may be used.

The camera 6 is disposed at a predetermined position in front of the screen 4 and the entire screen 4 including an image projected on the screen 4 (hereinafter referred to as a “display image”) from the front is a fixed frame rate (for example, 30 frames / second). Here, the imaging range by the camera 6 may be a range in which the display image is sufficiently contained, and does not necessarily match the display image range.
Image information of an image captured by the camera 6 is output to the PC 2.

The PC 2 stores an image (hereinafter referred to as a “slide image image”) created in advance for projection onto the screen 4 at the time of presentation. The slide image is formed from a single or a plurality of slide images to which character information, image information, etc. are input.
The PC 2 creates a display image to be projected on the screen 4 based on the image information G3 of the slide image and the image information G2 of the image output from the camera 6 (hereinafter referred to as “captured image”). Is output to the projector 3. The projector 3 projects an image generated based on the image information G1 of the display image on the screen 4.

Further, since the PC 2 can be connected to a network such as the Internet, the image information G2 of the captured image may be transmitted to another PC at a remote location via the network.
Next, a schematic configuration of the laser pointer 9 will be described with reference to FIGS. 2 (a) and 2 (b). 2A shows an external structure on the upper surface side of the laser pointer 9, and FIG. 2B shows an internal structure of the laser pointer 9. As shown in FIG.

  2A and 2B, the laser pointer 9 includes a first light emission switch 9a, a second light emission switch 9b, a third light emission switch 9c, and a fourth light emission switch 9d (" And a first operation button 10a, a second operation button 10b, and a third operation button 10c (corresponding to "accepting means" of the present invention) for controlling on / off of these switches 9a to 9d. It has been. The user 7 can select and press any one of the first operation button 10a, the second operation button 10b, and the third operation button 10c.

  2B, the laser pointer 9 includes a first light source 15 that emits red laser light L1 and a second light source 16 that emits infrared laser light L2. . Further, the laser pointer 9 is formed with a first slit 18 through which the laser light L1 emitted from the first light source 15 passes and a second slit 19 through which the laser light L2 emitted from the second light source 16 passes. .

  In addition, a laser beam shape changing unit 17 including a lens, a slit, and the like (not shown) is provided between the second light source 16 and the second slit 19. The laser beam L2 irradiated from the second light source 16 passes through the laser beam shape changing unit 17 and the second slit 19 in this order, and is irradiated to the outside of the laser pointer 9.

The first operation button 10a controls on / off of the first light emission switch 9a and the second light emission switch 9b. When the first light emission switch 9a and the second light emission switch 9b are off, the first operation button 10a is When pressed, the first light emission switch 9a is turned on. In this state, when the first operation button 10a is pressed again, the second light emission switch 9b is turned on in addition to the first light emission switch 9a. When the first operation button 10a is pressed again, both the first light emission switch 9a and the second light emission switch 9b are turned off.
Similarly, the second operation button 10b controls on / off of the third light emission switch 9c, and the third operation button 10c controls on / off of the fourth light emission switch 9d.

  The first light emission switch 9 a controls on / off of the first light source 15. When the first light emission switch 9a is turned on, red laser light L1 is emitted from the first light source 15. The user 7 indicates an arbitrary position of the screen 4 using the laser beam L1.

  The second light emission switch 9b, the third light emission switch 9c, and the fourth light emission switch 9d control on / off of the second light source 16. When any one of the second light emission switch 9b, the third light emission switch 9c, and the fourth light emission switch 9d is turned on, the infrared laser beam L2 is emitted from the second light source 16.

  As described above, in the present embodiment, the user 7 can press only one of the first operation button 10a, the second operation button 10b, and the third operation button 10c. For this reason, a plurality of the second light emission switch 9b, the third light emission switch 9c and the fourth light emission switch 9d are not turned on, and only one of them can be turned on.

  Arrangement of lenses and slits (not shown) constituting the laser beam shape changing unit 17 depending on which of the second light emitting switch 9b, the third light emitting switch 9c, and the fourth light emitting switch 9d is turned on. The position will be different. The shape of the laser light L2 emitted from the second light source 16 differs depending on the positions of the lenses and slits constituting the laser light shape changing unit 17.

  When the second light emission switch 9b is turned on, as shown in FIG. 2C, the point-shaped laser beam L2 (corresponding to the “instruction image” of the present invention) is emitted. On the other hand, when the third light emission switch 9c is turned on, a linear laser beam L2 (corresponding to the “instruction image” of the present invention) is emitted as shown in FIG. On the other hand, when the fourth light emission switch 9d is turned on, as shown in FIG. 2E, a circular laser beam L2 (corresponding to the “instruction image” of the present invention) is emitted.

Next, a detailed configuration of the PC 2 will be described with reference to FIG.
The PC 2 controls the operation of each part of the circuit by a main controller (CPU), and the control program is stored in advance in the ROM of the memory. The PC 2 includes an image processing unit 11 to which image information G2 of a captured image is input, a drawing memory 12 in which various pieces of image information are temporarily stored during the operation of the CPU, and the slide image memory 13 described above. .

The image processing unit 11 includes a mode detection unit 14 that detects which of the second light emission switch 9b, the third light emission switch 9c, and the fourth light emission switch 9d is on.
Further, the slide image memory 13 stores a slide image image created in advance and a blank slide image image into which information relating to characters, images, and the like is not input.

  Image information G2 of a captured image output from the camera 6 is first input to the image processing unit 11. The image information G2 input to the image processing unit 11 is output to the mode detection unit 14. When the PC 2 is connected to a network, the image information G2 may be transmitted to another PC at a remote location via the network.

  The image processing unit 11 determines which mode the user 7 has selected based on the image information G2 of the captured image output to the mode detection unit 14. The image processing unit 11 selects whether to perform predetermined processing on the image information G2 of the captured image or to output a predetermined command to the slide image memory 13 according to the selected mode. In the present embodiment, the “predetermined command” indicates a command for turning the page so that the slide image projected on the screen 4 becomes the next slide image.

  When a predetermined process is performed on the image information G2 of the captured image, the image processing unit 11 temporarily stores the image information G2 of the captured image that has been subjected to this process in the drawing memory 12 (arrow A in FIG. 3). The image information G2 of the captured image written in the drawing memory 12 is superimposed on the image information G3 of the slide image image stored in the slide image memory 13. Image information G1 of the display image is generated from the superimposed image information, and this image information G1 is output to the projector 3.

  On the other hand, when a predetermined command is output to the slide image memory 13, the fact that image information relating to the next slide image is read as the image information G1 of the display image is output to the slide image memory 13 (arrow B in FIG. 3). The image information G1 of the display image is output to the projector 3 and projected from the projector 3 onto the screen 4.

  Incidentally, the captured image may include a background image of the screen 4 in addition to the display image projected and displayed on the screen 4. In addition, the captured image captured by the camera 6 may be distorted, for example, the camera 6 or the projector 3 may be disposed to be inclined with respect to the screen 4.

  Therefore, in this embodiment, the calibration process is executed every time the presentation apparatus 1 is turned on. Hereinafter, this calibration process will be described with reference to FIGS. 4 and 5. FIG. In the present embodiment, the horizontal axis direction is the X-axis direction, and the vertical axis direction is the Y-axis direction.

When the calibration process is started, first, as shown in FIG. 5A, n is set at the left end of the blank slide image stored in the slide image memory 13 (the position of SX = “SX ₀ ”). The points are displayed side by side in the vertical direction (step S100). A blank slide image image in which n points are displayed side by side in this way is projected onto the screen 4 through the projector 3 as shown in FIG.

  Next, the drawing memory 12 is scanned (step S101). That is, the image information G2 of the captured image captured by the camera 6 and output to the rendering memory 12 is read from the rendering memory 12, and the captured image is scanned.

Then, it is determined whether n points displayed in step S100 have been detected (step S102). When it is determined that n points have been detected (step S102: YES), the coordinates (SX ₀ , SY _n ) (n = 0, 1, 2, 3,. N) and coordinates (X ₀ , Y _n ) (n = 0, 1, 2, 3... N) on the captured image are stored (step S103).

Then, the n points displayed on the slide image are moved to the right by a predetermined width (step S104). That is, as shown in FIG. 5A, n points are displayed in a vertical direction at a predetermined position (a position of SX = “SX ₁ ”) of a blank slide image.
After n points are moved to the right in this way, or when it is determined that there is a point that has not been detected among the n points displayed on the screen 4 (step S102: NO), then one screen is displayed. Whether or not the processing of the n points displayed on the slide image has ended and the n points are at the right end of the slide image (SX = “SX _n ” position). Is determined (step S105).

When it is determined that the process for one screen has not been completed (step S105: NO), the processes after step S101 are executed again.
On the other hand, when it is determined that the processing for one screen has been completed (step S105: YES), the coordinates (SX _n , SY _n ) (n = 0, 1, 2, 3,... N) of the detected points are detected. ) And (X _n , Y _n ) (n = 0, 1, 2, 3... N), coordinate transformation is executed by a known method (step S106), and this process is temporarily terminated.
Through such processing, the coordinate system of the display image in the captured image can be associated with the coordinate system of the slide image image.

  Next, referring to FIG. 6 and FIG. 7, a display process for determining which mode the user 7 has selected and controlling a display image displayed on the screen 4 according to the selected mode. explain.

  First, the PC 2 sequentially scans each pixel value of the captured image output from the camera 6. In this embodiment, as shown in FIG. 7, first, scanning is performed from the upper left end to the upper right end (in the direction indicated by the arrow (1) in FIG. 7), and then indicated by the arrow (1). A position below the position by a predetermined width is scanned from the left end to the right end (the direction indicated by the arrow (2) in FIG. 7). In this way, scanning is repeated sequentially until reaching the lower end.

  Next, as shown in FIG. 6, the PC 2 determines whether or not the area being scanned is a scan area (step S200). The scan region is a region corresponding to the display image extracted through the above-described calibration process in the captured image, and indicates a region to be scanned.

  If it is determined that the area being scanned is a scan area (step S200: YES), it is then determined whether or not a hot spot Po has been detected (step S201). The hot spot Po indicates a light spot on the screen 4 of the laser light L2 emitted from the laser pointer 9. The PC 2 determines that the hot spot Po has been detected by detecting an infrared point having a pixel value equal to or greater than a predetermined value.

  When it is determined that the hot spot Po has been detected (step S201: YES), a mode determination process for determining which mode is selected next is executed (step S202). The mode determination process is executed by the mode detection unit 14.

Here, the mode determination process will be described with reference to FIGS.
As described above, the shape of the laser light L2 emitted from the laser pointer 9 differs depending on the light emitting switch that is turned on. 8A shows the shape of the laser light L2 applied to the screen 4 when the second light emission switch 9b is turned on, and FIG. 8B shows the case where the third light emission switch 9c is turned on. FIG. 8C shows the shape of the laser light L2 irradiated on the screen 4, and FIG. 8C shows the shape of the laser light L2 irradiated on the screen 4 when the fourth light emission switch 9d is turned on. The PC 2 determines which shape of the laser light L2 is the shape shown in FIGS. 8A to 8C and determines which mode is selected according to the shape.

  As indicated by arrows in FIGS. 8A to 8C, when the mode detection unit 14 detects the hot spot Po, the mode detection unit 14 scans a range at a predetermined distance r1 from the hot spot Po. Then, depending on how many points having a pixel value greater than or equal to a predetermined value are detected, which of the second light emission switch 9b, the third light emission switch 9c, and the fourth light emission switch 9d is turned on. to decide. Details will be described below.

  When a point having a pixel value greater than or equal to a predetermined value is not detected in a range at a predetermined distance r1 from the hot spot Po, the point-shaped laser beam L2 is irradiated on the screen 4 as shown in FIG. it is conceivable that. In this case, the mode detection unit 14 determines that the second light emission switch 9b is on, that is, the first operation button 10a is pressed, and the image processing unit 11 enters the drawing mode (step S203).

On the other hand, when one point having a pixel value greater than or equal to a predetermined value within the range of the predetermined distance r1 from the hot spot Po is detected, the linear laser beam L2 is applied to the screen 4 as shown in FIG. Is considered to have been irradiated. In this case, the mode detection unit 14 determines that the third light emission switch 9c is on, that is, the second operation button 10b is pressed, and the image processing unit 11 shifts to the command mode (step S204). Further, the coordinates (X ₁ , Y ₁ ) of the infrared point P ₁ having a pixel value equal to or greater than a predetermined value are stored.

On the other hand, when two points having a pixel value greater than or equal to a predetermined value are detected in a range at a predetermined distance r1 from the hot spot Po, as shown in FIG. 8C, a circle passing through the hot spot Po. It is considered that the laser beam L2 having the shape is irradiated on the screen 4. In this case, the mode detection unit 14 determines that the fourth light emission switch 9d is on, that is, the third operation button 10c is pressed, and the image detection unit 11 shifts to the erase mode (step S205). Further, the coordinates (X ₁ , Y ₁ ) of the infrared color point P ₁ having a pixel value equal to or greater than a predetermined value and the coordinates (X ₂ , Y ₂ ) of the point P ₂ are stored.

  As described above, the mode detection unit 14 determines which one of the first operation button 10a, the second operation button 10b, and the third operation button 10c is pressed, and displays the drawing mode, the command mode, or the erase mode. Transition to one of the modes.

Processing when the drawing mode is shifted will be described with reference to FIG.
As shown in FIG. 9, when this process is started, first, the coordinates (X ₀ , Y ₀ ) of the hot spot Po are detected (step S301).

Next, the pixel value of the coordinates (X ₀ , Y ₀ ) of the hot spot Po is set to a value equal to or greater than the specified value C (step S302). The specified value C is preferably 200 or more. In the present embodiment, the maximum value (255) is set. Then, the image information G2 of the captured image in which the pixel value of the coordinates (X ₀ , Y ₀ ) is the maximum value (255) is output to the drawing memory 12.
Thus, by setting the pixel value of the coordinates (X ₀ , Y ₀ ) of the hot spot Po to the maximum value (255), the point indicated by the laser pointer 9 by the user 7 is the maximum pixel value on the screen 4. Will be displayed.

  On the other hand, when it is determined that the command mode is selected through the mode determination process (step S202), the image processing unit 11 shifts to the command mode (step S204).

Next, processing when the mode is shifted to the command mode will be described with reference to FIG.
As shown in FIG. 10, when this process is started, the coordinates (X ₁ , Y ₁ ) of the point P ₁ are stored as command selection coordinates (step S401).

Then, it is determined whether or not the coordinates (X ₁ , Y ₁ ) of the point P ₁ are in a predetermined area (step S402). Here, the predetermined area is an area set at the lower right end of the screen 4, for example. The predetermined area may be set in advance or may be set when the command mode is entered. Moreover, it is desirable to set the pixel value to a high value so that the user 7 can visually recognize this predetermined area.

When it is determined that the coordinates (X ₁ , Y ₁ ) of P ₁ are in the predetermined area (step S402: YES), that is, when it is determined that the user 7 is irradiating the laser light L2 on the predetermined area, the command Is executed (step S403). In this embodiment, a command is output to the slide image memory 13 so as to perform page turning.

On the other hand, when it is determined that the coordinates (X ₁ , Y ₁ ) are not in the predetermined area (step S402: NO), this process is temporarily terminated.
According to the present embodiment, the user 7 can execute the page feed without using a mouse or the like by selecting the command mode and irradiating the laser beam L2 toward the predetermined area. Become.

On the other hand, when it is determined that the erase mode is selected through the mode determination process (step S202), the image processing unit 11 shifts to the erase mode (step S205).
Next, processing when the mode is shifted to the erase mode will be described with reference to FIG. 8C and FIG.

As described above, when the mode determination process is executed and two infrared dots having a pixel value equal to or larger than a predetermined value are detected, the image processing unit 11 shifts to the erase mode.
As shown in Figure 11, when the process is started, first stores the coordinates of the points of the infrared color P ₁ and point P _{2 (see} FIG. 8 (c)) having a predetermined value or more pixel values. Then, the coordinates _(X c, _{Y c)} of the middle point Pc at a distance equal to the imaginary line from the point _{P 1} and point _{P 2} connecting the point _{P 1} and point _{P 2} stores (step S501).

Next, the pixel value in the range of 20 pixels in the X-axis direction and 20 pixels in the Y-axis direction including the coordinates ( _Xc , _Yc ) of the midpoint Pc is set to the minimum value (0) (step S502). The range in which the pixel value is the minimum value (0) is preferably 20 pixels in the X-axis direction and 20 pixels in the Y-axis direction, 10 pixels in the X-axis direction, and 10 pixels in the Y-axis direction. A range is more preferred. The image information G2 of the captured image is output to the drawing memory 12. Thereby, the user 7 can erase the image in the range of 20 pixels in the X-axis direction and 20 pixels in the Y-axis direction including the coordinates (X _c , Y _c ).

  By the way, in this embodiment, the entire range of the captured image is scanned. Therefore, even when the captured image is scanned to detect the hot spot Po (step S201: YES), another portion of the laser beam L2 that forms the hot spot Po is detected again as a different hot spot Po. There is a risk. In this case, although the user 7 does not intend, the mode is again switched to the drawing mode, the command mode, or the erase mode. Therefore, in the present embodiment, when the hot spot Po is detected, as shown in FIG. 7, a predetermined area including the hot spot Po is set as a non-scan area (step S206).

  That is, after shifting to one of the drawing mode (step S203), the command mode (step S204), and the erase mode (step S205), next, as shown in FIG. 7, a predetermined area including the hot spot Po Is set as a non-scan area (step S206). A preferable setting range of this non-scan area is a range of 10 pixels in the X-axis direction including the hot spot Po and 10 pixels in the Y-axis direction, more preferably 5 pixels in the X-axis direction and 5 pixels in the Y-axis direction. A range of pixels. By setting the non-scan area in this way, the periphery of the hot spot Po is not scanned.

  As described above, after a predetermined area including the hot spot Po is set as a non-scan area (step S206), or when it is determined not to be in the scan area (step S200: NO), or the hot spot Po is not detected. (Step S201: NO), the PC 2 determines whether or not the scan of the scan area has ended (step S207).

If it is determined that the scan of the scan area has been completed (step S207: YES), this process is temporarily terminated.
On the other hand, when it is determined that the scan of the scan area has not been completed (step S207: NO), the processes after step S200 are executed again.

  According to the presentation apparatus 1 described above, the user 7 is projected on the screen 4 by drawing an arbitrary image on the screen 4 or turning the page only by operating the laser pointer 9 without using a mouse or the like. The image can be controlled.

  Next, with reference to FIG. 12, a presentation is made at the A venue in a situation where the presentation apparatus 1 according to the present embodiment is disposed at both the A venue and the B venue (remote location). The case where the contents are transmitted to the venue B through the network will be described.

  As shown in FIG. 12, the image information G2 of the captured image taken at the A venue is transmitted to the PC at the B venue, so that the user 7 uses the laser pointer 9 at the A venue to use the images A and B. Is drawn, the image A and the image B are also displayed on the screen 4 of the B venue based on the image information G2 of the captured image taken at the A venue. Similarly, when the user 7 draws the image C using the laser pointer 9 at the B venue, the image information G2 of the captured image taken at the B venue is transmitted to the A venue. 4 displays an image C.

  Although not specifically shown, when the user 7 selects the command mode in the A venue and outputs a page feed command for the image projected on the screen 4 in the A venue, the command is projected on the screen 4 in the B venue. Page feed is also executed for images. Similarly, when the user 7 selects the erase mode in the A venue and deletes a part of the image projected on the screen 4 in the A venue, the image projected on the screen 4 in the B venue A The image at the position equivalent to the position erased on the screen 4 is erased.

According to the said embodiment, there can exist an effect demonstrated below.
(1) In the present embodiment, it is determined which mode is selected based on the shape of the laser light L2 emitted from the laser pointer 9, and the display image is changed according to the selected mode. ing. For this reason, the user 7 can control the image projected on the screen 4 by operating the laser pointer 9 without using a mouse or the like.

  (2) When the drawing mode is selected, the pixel value at the position indicated by the laser beam L2 emitted from the laser pointer 9 is maximized. For this reason, the user 7 can leave an image having the maximum pixel value on the screen 4 without using a mouse or the like.

  (3) Since the PC 2 is connected to the network, the image information G1 of the display image changed through the operation of the laser pointer 9 can be transmitted to a remote place.

  (4) Further, since the laser light L2 is made of invisible infrared light, the visible light image displayed on the screen 4 does not change even when the laser light L2 is irradiated. For this reason, it is possible to prevent the display image from becoming difficult to see.

  (5) Further, since the entire captured image is scanned, even when a presentation is executed using a plurality of laser pointers 9, a command output from each laser pointer 9 can be accepted. it can.

(Other embodiments)
The presentation device 1 according to the present invention is not limited to the configuration exemplified in the above embodiment, and can be implemented as, for example, the following form obtained by appropriately changing the embodiment. The following modifications are not applied only to the above-described embodiment, and different modifications can be combined with each other.

  (A) In the above embodiment, the presentation apparatus 1 including the projector 3 and the screen 4 has been described. However, the present invention is not limited to this. For example, as shown in FIG. 13, a display 20 may be provided instead of the projector 3 and the screen 4. In this modification, the PC 2 is connected to the display 20 and a presentation image is displayed on the display 20. And the camera 6 is arrange | positioned in the position which can image the display 20, and image information G2 of the captured image imaged with the camera 6 is output to PC2. Also in this modification, the effect according to the said effect can be show | played.

  (B) In the above embodiment, the image information of the PC 2 is transmitted to the remote PC. However, the present invention is not limited to this, and the PC 2 receives the image information from the remote PC. The image generated based on the image information may be displayed on the screen 4.

  (C) The image information G1 related to the display image may be generated using a plurality of layers. In this modification, the image processing unit 11 changes the pixel value of a layer different from the layer to which the image information G3 of the slide image image is input at the point where the laser light L2 is irradiated when the drawing mode is entered. It is preferable to set the maximum value. According to this modification, since the change is not made to the image information G3 of the slide image, it is possible to prevent the user 7 from making an unintended change to the slide image.

  (D) When the erase mode is selected in (c) above, the image processing unit 11 is a layer different from the layer in which the image information G3 of the slide image image is input, and the drawing mode is selected. Only the pixel value of the layer that has been changed at that time may be set to “0”. According to this modification, the pixel value of the layer in which the slide image is input is suppressed from being “0”. For this reason, even when the erase mode is selected, it is possible to prevent the slide image image itself from being changed during the presentation.

  (E) Although the case where one laser pointer 9 is used has been described in the above embodiment, the number of laser pointers 9 to be used is not limited to this, and a plurality of laser pointers 9 can also be used. .

  (F) In the above (e), the laser beam L2 irradiated from the specific laser pointer 9 is made larger than the laser beam L2 irradiated from the other laser pointer 9, and only the shape of the largest laser beam L2 is received by the PC 2. You may make it recognize. According to this modification, while reflecting the intention of the specific user 7 in the image, it is possible to prevent other users 7 from outputting commands that the specific user 7 does not intend.

  (G) In the above embodiment, the PC 2 is connected to the network. However, as this network, various networks such as an intranet as well as the Internet can be adopted.

  (H) When the command mode is selected, a plurality of predetermined areas may be displayed on the screen 4. At this time, a different command may be executed for each predetermined region where the laser beam L2 is detected. For example, page feed may be executed when the laser beam L2 is detected in a specific predetermined area, and page return may be executed when the laser beam L2 is detected in another predetermined area. Furthermore, the presentation can be ended when the laser beam L2 is detected in another predetermined area, or the first page can be returned when the laser beam L2 is detected in another predetermined area.

  (I) In the above embodiment, the entire captured image is scanned. However, the present invention is not limited to this, and the scanning may be terminated when the hot spot Po is detected.

  (J) In the above embodiment, the image information G2 of the captured image is transmitted to another PC at a remote location, but the image information transmitted to the other PC is not limited to the image information G2 of the captured image. Instead, the image information G1 of the display image generated based on the captured image and the slide image may be transmitted to another PC.

  (K) In the above embodiment, the laser beam L2 made of infrared color is used. However, the laser beam L2 of the present invention may not be visible light and may be made of ultraviolet rays.

  (L) In the above embodiment, the laser pointer 9 including the first light emitting switch 9a, the second light emitting switch 9b, the third light emitting switch 9c, and the fourth light emitting switch 9d has been described. It is not restricted and any one of the light emitting switches 9a to 9d described above may be provided.

  (M) In the above embodiment, the image information G2 of the captured image is transmitted to the remote PC. However, the present invention is not limited to this, and the image information G1 of the display image is transmitted to the remote PC. You may send it.

1. Presentation device 2. PC
DESCRIPTION OF SYMBOLS 3 ... Projector 4 ... Screen 6 ... Camera 7 ... User 9 ... Laser pointer 9a ... 1st light emission switch 9b ... 2nd light emission switch 9c ... 3rd light emission switch 9d ... 4th light emission switch 10a ... 1st operation button 10b ... 1st Two operation buttons 10c ... Third operation button 11 ... Image processing unit 12 ... Drawing memory 13 ... Slide image memory 14 ... Mode detection unit 15 ... First light source 16 ... Second light source 17 ... Laser beam shape changing unit 18 ... First slit 19 ... second slit 20 ... display

Claims (6)

A presentation apparatus comprising: a control unit that controls a display image to be displayed on a display surface; a laser pointer that irradiates an instruction image on the display surface; and an image recognition unit that recognizes a shape of an image displayed on the display surface. There,
The laser pointer includes a receiving unit that receives a plurality of commands, and changes the instruction image into a different shape according to the command received by the receiving unit.
The presentation device characterized in that the control means controls the display image based on the shape of the instruction image recognized through the image recognition means. The presentation device according to claim 1,
When the instruction image is recognized through the image recognition means as corresponding to the first command among the plurality of commands,
The presentation device, wherein the control means controls the display image to draw a predetermined image at a position where the instruction image is indicated. The presentation device according to claim 1 or 2,
A presentation apparatus, wherein image information output from the image recognition means is transmitted via a network. The presentation device according to any one of claims 1 to 3,
The instruction image is made of invisible light,
The presentation device, wherein the image recognition means recognizes the instruction image based on the invisible light. The presentation device according to any one of claims 1 to 4,
When the instruction image is recognized through the image recognition means as corresponding to a second command among the plurality of commands, the display image is switched to a display image different from the currently displayed display image. Feature presentation device. The presentation device according to any one of claims 1 to 5,
When the instruction image is recognized through the image recognition means as corresponding to the third command among the plurality of commands,
The presentation device, wherein the control means erases the display image in a predetermined range including a position where the instruction image is shown.

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