JP4529137B2 - Presentation device and photographing method - Google Patents

Description

  The present invention relates to a presentation apparatus and a presentation method for capturing an image of a document or a three-dimensional object and outputting the image as a projector projection image signal.

  2. Description of the Related Art Conventionally, projection devices that are described with a marker pen on a transparent OHP sheet at a conference or academic meeting, and that are enlarged are used as presentation devices. A bright projection image is obtained by projecting directly onto a screen using a high-intensity lamp. In order to maintain the quality of the projected image, the user arranges the target image in the center of the screen, or aligns the boundary of the projected image with the screen boundary while adjusting the OHP sheet position while viewing the projected image. ing. In particular, when the positional relationship between the projection device and the screen is shifted from the normal positional relationship and is obliquely arranged, the projected image is displaced with respect to the screen even if the OHP sheet is placed at the normal position. The place where the OHP sheet is placed is shifted and corrected so as to cancel the positional deviation.

  On the other hand, recently, a projection television for projecting an image taken with a video camera onto a screen has come into practical use. Since video cameras can shoot opaque materials and three-dimensional objects, it is easy to create presentation materials. In the case of using a video camera, an image taken in accordance with the angle of view of the camera is displayed as an image at a predetermined position adjusted to the angle of view of the screen. However, regarding the screen luminance, although a projection television with a high luminance level has been developed, it cannot be as high as that obtained by OHP projection. The lighting of the presentation room is dimmed to make it easier to see the screen projection image.

Patent Document 1 discloses a material presentation device that captures a document or a three-dimensional object with a CCD camera and reproduces the captured image on a screen or the like outside the device. A material table having a guide function for guiding the placement position of the material to the operator is realized. A guide pattern is projected onto the material placement table in the blanking section of the CCD camera, making it easy to place the material in alignment with the guide and obtaining an image that matches the angle of view within the field of view of the CCD camera. A material presentation device is disclosed.
JP 2002-94836 A

  However, in the material presentation device disclosed in Patent Document 1, it is necessary to display the material arrangement guide display by providing beam projection means and a reflecting mirror, and display the projection timing in synchronization with the vertical synchronization period of the video camera. Becomes complicated. It is desired to realize a presentation device that can present an image with high arrangement accuracy with a simple configuration and that can easily obtain a presentation effect.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a guide display for a user to place a subject imaged and projected by a camera at a predetermined position on the screen. In addition, an object of the present invention is to provide a presentation apparatus and a presentation method in which a guide display is not captured by a camera but only a presentation material is captured and projected onto a screen.

The first invention in the present invention is:
A presentation in which a subject placed on a light-transmitting stage (12a) is irradiated with light emitted from a lamp (11, 11a) and reflected by the imaging camera (15) to give a presentation. In device (1) :
A motion detector (16) for detecting the motion of the subject;
An external light receiving unit (18a) for detecting the illuminance in the room;
A backlight (14) for emitting illumination light;
A light-transmissive guide display plate (13a) in which a reference region irradiated with the illumination light is formed;
A control unit (18) for controlling the amount of light emitted from the lamp and the backlight based on the movement of the subject and the illuminance in the room;
Transmitted through the light transmissive guide display panel, the light quantity is controlled by the control unit, to generate either polarized light of P-polarized light or S-polarized light from the illumination light emitted from the backlight, the product a polarization filter (13) polarized light you emitted to the light transmissive table that,
Without spend before Symbol permeable to Kihen light before passing through the light transmissive table arranged on the imaging side of the imaging camera, and perpendicular to the polarized light transmitted through the light-transmitting of the mounting table, and the amount of light is controlled by the control unit, the polarizing plate is emitted you transmit polarized light of the object light reflected by the object from the lamps and (15a),
A presentation device is provided.
The second invention is
In a shooting method of shooting a subject light reflected by irradiating light emitted from a lamp onto a subject placed on a light-transmissive mounting table with an imaging camera,
Detecting the movement of the subject,
Detect indoor illuminance,
Irradiate illumination light emitted from the backlight onto a light-transmissive guide display board on which a reference area is formed,
Based on the movement of the subject and the illuminance in the room, the amount of light emitted from the lamp and the backlight is controlled,
The light transmitting guide display plate is transmitted , the amount of light is controlled, and the illumination light emitted from the backlight is irradiated to the polarizing filter,
The polarizing filter to generate either polarized light of P-polarized light or S-polarized light, emitted from the polarization light the product to the light transmitting the mounting table,
The Kihen light before passing through the light transparent table without Toru spend the polarizing plate, the transmitted through the light transmissive of the table orthogonal to the polarized light, and the light amount is controlled, from the lamp Shoots by the imaging camera through the polarized light of the subject light reflected by the exit has been the subject
To provide the imaging method which is characterized a call.

According to the present invention,
A motion detector that detects the movement of the subject, an external light receiver that detects the illuminance in the room,
Based on a backlight that emits illumination light, a light-transmissive guide display board in which a reference region irradiated with the illumination light is formed, the movement of the subject and the illuminance in the room, the lamp and the backlight a control unit for controlling the amount of light emitted, transmitted through the light transmissive guide display panel, the light quantity is controlled by the control unit, the illumination light emitted from the backlight P-polarized light or S-polarized light generating one of polarized light, prior to the polarized light the generated and transmitted with polarization filter you emitted to the light transmissive table, the light permeability of the mounting table disposed in the imaging side of an imaging camera without spend permeable to Kihen light said that, the transmitted through the light transmissive of the table orthogonal to the polarized light, and the light amount is controlled by the control unit, reflected by the object is emitted from the lamp polarized object light Since a polarizing plate you transmit light, and is imaged by the imaging camera, performs a guide display for disposing the object to be projected to a predetermined position on the screen to the user, the guide display is imaged It is possible to realize a presentation apparatus and a presentation method with a simple configuration in which only presentation materials are projected on a screen without being photographed by a camera.

Hereinafter, presentation devices according to embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram illustrating a configuration example of a presentation apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an appearance of the presentation apparatus according to the embodiment of the present invention.
FIG. 3 is a perspective view showing a configuration example of a main part of the presentation apparatus according to the embodiment of the present invention.
FIG. 4 is a perspective view for explaining an operation according to the embodiment of the present invention.
FIG. 5 is a block diagram illustrating a configuration example of a main part of the presentation apparatus according to the embodiment of the present invention.
FIG. 6 is a flowchart showing the operation of the presentation apparatus according to the embodiment of the present invention.
FIG. 7 is a perspective view showing an application configuration example of a main part of the presentation apparatus according to the embodiment of the present invention.
FIG. 8 is a perspective view showing the external appearance of the main part of the presentation apparatus according to the embodiment of the present invention.

The configuration of the presentation device will be described.
The presentation apparatus 1 shown in FIG. 1 includes lamps 11 and 11a, a document placing table 12a, a polarizing filter 13, a guide display board 13a, a backlight 14, a camera 15, a polarizing plate 15a, a motion detection unit 16, a memory 16a, and a processing unit 17. , A memory 17a, a control unit 18, an external light receiving unit 18a, and an operation unit 19.
The control unit 18 illustrated in FIG. 5 includes a motion time measuring device 181, a motion time determining device 182, an operation determining device 183, a backlight controller 184, and a lamp controller 185.

The operation of the presentation device will be described.
A description will be given with reference to FIG.
First, the operation unit 19 is operated to turn on the backlight 14. A guide display for placing presentation materials drawn on the guide display board 13a is irradiated. The polarizing filter 13 is a filter that allows only light having a predetermined polarization angle out of incident light. The guide display is emitted as light having a predetermined polarization angle, for example, P-polarized light (or S-polarized light) that passes through the document table. The user places the presentation material on the document placement table 12a based on the guide display. The placed presentation material is irradiated by the lamps 11 and 11a. The light reflected on the presentation material passes through the polarizing plate 15a that transmits the light of S-polarized light (or P-polarized light) having a polarization angle orthogonal to a predetermined polarization angle that is P-polarized light (or S-polarized light). Is incident on the camera 15. The camera 15 captures reflected light of the presentation material.
Guide display light emitted with a predetermined polarization angle through the polarizing filter 13 does not pass through the polarizing plate 15a and is not photographed by the camera 15. An image of only the presentation material is taken by the camera 15 as an image placed at a central position and parallel to the screen frame, and is projected onto a screen (not shown) using a projector (not shown).

The projected image on the screen is viewed by the viewer. Here, when the indoor lighting is dimmed, the leaked light from the lamps 11 and 11a is also visible to the viewer. In order to make an effective presentation, it is preferable to dimm the lamps 11 and 11a when the room lighting is dark. The dimming control of the lamps 11 and 11a will be described.
The motion detector 16 detects the position of the presentation material photographed by the camera 15. Image position information including the outline information of the presentation material obtained by the detection is stored in the memory 16a. The motion detection unit 16 compares the image position information stored in the memory 16a with the position information of the input image, and inputs a stationary state signal to the control unit 18 when it is detected that the image is stationary for a predetermined time. To do. The control unit 18 turns off the backlight 14 when the illuminance in the presentation venue detected by the external light receiving unit 18a is detected to be equal to or lower than the predetermined illuminance, and the image input to the processing unit 17 is stored in the memory 17a. To remember. From the presentation device 1, the image stored in the memory 17a is read and output. The control unit 18 dims the lamps 11 and 11a. In the motion detector 16, the light amounts of the lamps 11 and 11 a are reduced until motion detection based on the image captured by the camera 15 is possible.

The motion detector 16 outputs a motion detection signal to the controller 18 when it detects the movement of the presentation material. The control unit 18 turns on the backlight 14 and cancels the dimming of the lamps 11 and 11a. After the next presentation material is placed on the document placement table 12a, the dimming operation is performed when the motion detection unit 16 detects a stationary state for a predetermined time or longer.
Since the guide display drawn on the guide display board 13a is identified only by the user and is not incident on the camera 15, for example, even when shooting a small presentation material or a transparent presentation material, the guide display is captured by the camera 15. Not displayed on the screen.

  Here, when the angle between the polarization angle of the polarizing filter 13 and the polarization angle of the polarizing plate 15a has an error with respect to the orthogonal relationship, the leakage light component that the guide display passes through the camera 15 according to the error is detected. It will be imaged. If the light amount of the lamps 11 and 11a is reduced without reducing the light amount of the backlight, the guide display is easily imaged together with the presentation material. If the presentation apparatus 1 dimmes the lamps 11 and 11a after dimming the backlight 14, the guide display is difficult to image even if there is an error in the orthogonal relationship of the polarization angles.

The presentation apparatus 1 will be further described with reference to FIG.
An external light receiving unit 18a is installed on the back of the lamps 11 and 11a to detect illumination in the presentation room. When the room illuminance falls below a predetermined value, the illuminance of the lamps 11 and 11a is lowered. This prevents an indoor viewer from hindering viewing of the screen irradiation image due to light leaked from the lamps 11 and 11a.

The document placement unit 12 will be further described with reference to FIG.
The document placing section 12 is arranged in the order of a light transmissive document placing table 12a, a polarizing filter 13, a guide display plate 13a, and a backlight 14 from the top. On the guide display board 13a, for example, a guide line used when a document having a size of A4 is placed in the vertical direction and the horizontal direction is described. The guide display is irradiated by the backlight 14, and the irradiated light is emitted as light having a predetermined polarization angle through the polarizing filter 13. The document placement table 12a is provided so that a document is placed on the document placement unit 12 and the document placement unit 12 is not deformed by the weight of the document.

The relationship between the polarization angles will be described with reference to FIG.
(A) shows the light radiate | emitted from the original mounting base 12a with a polarization angle. (B) shows the light which can enter the camera 15 through the polarizing plate 15a together with the polarization angle. The polarization angle shown in (A) and the polarization angle shown in (B) are orthogonal (90 degrees). The light having the polarization angle (A) is not incident on the camera 15 via the polarizing plate 15a. The guide display can be recognized by the user but is not photographed by the camera 15.

With reference to FIG. 5, the control part 18 which controls lighting of the lamps 11 and 11a and the backlight 14 will be described.
First, the illuminance information in the room received by the external light receiving unit 18a is input to the operation determination unit 183. When it is determined that the room illuminance is low, dimming control of the lamps 11 and 11a and the backlight 14 is performed. The motion time measuring device 181 receives “static information” or “motion information” detected by the motion detector 16. The threshold for the movement time for determining that the presentation material has been moved and the threshold for the stationary time for determining the stationary state are input by operating the operation unit 19 in advance. The movement time determination unit 182 determines that the indoor illuminance is low when the duration of the “still information” exceeds a preset threshold time and the indoor determination is lower than the threshold by the operation determination unit 183. . When it is determined that the room illuminance is equal to or less than the predetermined value, the backlight controller 184 turns off the backlight 14, and then the lamp controller 185 dims the lamps 11 and 11. The illuminance of the lamps 11 and 11a at the time of dimming is dimmed within a brightness range in which the motion detection unit 16 can detect the motion information of the material.

Next, when the motion detection unit 16 detects that the presentation material has a motion, the duration of the “motion information” is compared with a preset threshold time. When the duration of “motion information” exceeds the threshold time, it is determined that the presentation material has been moved.
The determination by the movement time determination unit 182 is performed for both the movement amount and the movement time. If the amount of movement is greater than or equal to a predetermined amount, “movement information” is output, and it is determined that the presentation material has been moved when the movement information exceeds a threshold time. If the movement amount threshold is set to a small value, “movement information” is output when the document is moved slightly, such as when the user touches the presentation material. In addition, the user's hand may cross the field of view of the camera 14a during the presentation. Even in this case, “motion information” is output. The original image is obtained after the hand blocks the field of view of the camera 14a. The output “motion information” time is short. It is not determined that the presentation material has moved. By comparing a period in which “motion information” exists continuously with a threshold, it is possible to correctly determine the movement of the presentation material. Undesirable repetition of ON / OFF of the lamps 11 and 11a can be prevented. For example, when it is detected that 70% of the entire image matches the threshold for the amount of motion, “motion information” is not output. For example, there is a method of setting the threshold time to about 3 seconds.
There is also a method of adjusting the illuminance of the lamps 11, 11 a and the backlight 14 by using an operation knob installed in the operation unit 19.

The operation flow of the presentation apparatus 1 will be described with reference to FIG.
First, the lamps 11 and 11a are turned on in S (step) 71, and the backlight 14 is turned on in S72. In S73, the image captured by the camera 15 is output. In S74, the movement of the presentation material is detected, and in S75, it is detected whether or not the detected stationary time exceeds a preset threshold value. If the stationary time does not exceed the preset threshold, the operation from S74 is repeated. If exceeded, it is determined in S76 whether or not the slide (presentation material to be presented) is the last, and if it is not the last, it is detected in S77 whether or not the illuminance level of the external light is below the threshold value. If the threshold value is exceeded, the process proceeds to the step from S82. If it is detected that the threshold value is not more than the threshold value, the backlight is turned off in S78, and the image signal output from the camera 15 is stored in the memory 17a in S79. Output the image signal. Next, in S81, the lamps 11 and 11a are dimmed, and the process proceeds to S82.

  In S82, the movement of the presentation material is detected, and in S83, it is detected whether or not the movement time exceeds a threshold value. In S83, it is detected whether or not the movement time exceeds a threshold value. When the threshold value is not exceeded, the operation from S82 is repeated. When it is detected that the threshold value is exceeded, the illuminance of the lamp dimmed at S84 is returned to the basic illuminance. The illuminance of the backlight turned off in S85 is returned to a predetermined illuminance. In S86, the image signal captured by the camera 15 is output via the processing unit 17, and the steps from S74 are repeated. If it is determined in S76 that the slide is the last, the image output is turned off in S87, the backlight is turned off in S88, and the lamp is dimmed or turned off in S89.

The application configuration of the presentation apparatus will be described with reference to FIG.
The document placement unit 120 of the presentation apparatus shown in the figure has a transparent member 13b and a film document 13c arranged between the polarizing filter 13 and the guide display plate 13a, as compared to the document placement unit 12 shown in FIG. Is different in that. The document placing portion 120 is provided with a document insertion opening 12b for inserting a film document 13c.

  The guide display on the guide display plate 13 a irradiated on the backlight 14 is irradiated with light having a predetermined polarization angle via the polarizing filter 13. The guide display is blocked by the polarizing plate 15 a and is not incident on the camera 15. Similarly, the description content of the film original 13c inserted between the backlight 14 and the polarizing filter 13 can be viewed by the user, but is not photographed by the camera 15. The user can make a presentation while viewing the film original 13c.

FIG. 8 shows an external view of the document placing portion 120 in the application example.
The film manuscript 13c can be read at a position adjacent to the presentation material, and the description content of the film manuscript is not photographed by the camera 15 and is not projected on the screen. The film original 13c can be inserted and exchanged from the original insertion port 12b even during a presentation. The presenter (user) can make a presentation while referring to the description content 13e of the film document 13c.

  As described above, according to the presentation apparatus 1 described in the embodiment, the backlight 14 that emits illumination light, the light-transmissive guide display board 13a in which the reference region irradiated with the illumination light is formed, A polarizing filter 13 for generating P-polarized light (S-polarized light) from the illumination light transmitted through the light-transmissive guide display plate, and emitting the P-polarized light or S-polarized light to the light-transmissive mounting table; The S-polarized light (the P-polarized light) of the subject light is transmitted without transmitting the P-polarized light (the S-polarized light) transmitted through the light-transmissive mounting table disposed on the imaging side of the imaging camera. Since the polarizing plate 15a is transmitted, a guide display for arranging a subject imaged and projected by the imaging camera at a predetermined position on the screen is performed to the user, and the guide display is performed by the imaging camera. Not been taken, only the presentation material is able to realize a presentation device and the presentation method of simple configuration so as to be projected on the screen.

  Further, an area for displaying the film original 13c is provided on the original placement unit 120, and the user can smoothly advance the presentation while watching the film original not projected on the screen without causing the camera 15 to take an image.

  The present invention can be applied to a presentation device that takes an image of a document or a three-dimensional object and outputs it as a projector projection image signal.

It is a block diagram which shows the structural example of the presentation apparatus which concerns on implementation of this invention. It is a perspective view which shows the external appearance of the presentation apparatus which concerns on implementation of this invention. It is a perspective view which shows the structural example of the principal part of the presentation apparatus which concerns on implementation of this invention. It is a perspective view for demonstrating the operation | movement which concerns on implementation of this invention. It is a block diagram which shows the structural example of the principal part of the presentation apparatus which concerns on implementation of this invention. It is the figure which showed the operation | movement of the presentation apparatus based on implementation of this invention with the flowchart. It is a perspective view which shows the application structural example of the principal part of the presentation apparatus which concerns on implementation of this invention. It is a perspective view which shows the external appearance of the principal part of the presentation apparatus which concerns on implementation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Presentation apparatus 11, 11a Lamp 12, 120 Document mounting part 12a Document mounting base 13 Polarizing filter 13a Guide display board 14 Backlight 15 Camera 15a Polarizing plate 16 Motion detection part 16a Memory 17 Processing part 17a Memory 18 Control part 18a External light Light receiver 19 Operation unit 181 Motion time measuring device 182 Motion time determiner 183 Motion determiner 184 Backlight controller 185 Lamp controller

Claims (2)

In a presentation device that shoots a subject light reflected by irradiating light emitted from a lamp onto a subject placed on a light-transmissive placement table, and gives a presentation,
A motion detector for detecting the motion of the subject;
An external light receiving unit for detecting the illuminance in the room;
A backlight that emits illumination light;
A light-transmissive guide display plate in which a reference region irradiated with the illumination light is formed;
A control unit for controlling the amount of light emitted from the lamp and the backlight based on the movement of the subject and the illuminance in the room;
Transmitted through the light transmissive guide display panel, the light quantity is controlled by the control unit, to generate either polarized light of P-polarized light or S-polarized light from the illumination light emitted from the backlight, the product a polarizing filter for polarizing the light you emitted to the light transmissive table that,
Without spend before Symbol permeable to Kihen light before passing through the light transmissive table arranged on the imaging side of the imaging camera, and perpendicular to the polarized light transmitted through the light-transmitting of the mounting table, and quantity is controlled by the control unit, and a polarizing plate you transmit polarized light is emitted from the lamp is reflected by the object the object light,
A presentation apparatus characterized by comprising: In a shooting method for shooting a subject light reflected by irradiating light emitted from a lamp to a subject placed on a light-transmissive mounting table with an imaging camera,
Detecting the movement of the subject,
Detect indoor illuminance,
Irradiate illumination light emitted from the backlight onto a light-transmissive guide display board on which a reference area is formed,
Based on the movement of the subject and the illuminance in the room, the amount of light emitted from the lamp and the backlight is controlled,
The light transmitting guide display plate is transmitted , the amount of light is controlled, and the illumination light emitted from the backlight is irradiated to the polarizing filter,
The polarizing filter to generate either polarized light of P-polarized light or S-polarized light, emitted from the polarization light the product to the light transmitting the mounting table,
The Kihen light before passing through the light transparent table without Toru spend the polarizing plate, the transmitted through the light transmissive of the table orthogonal to the polarized light, and the light amount is controlled, from the lamp Shoots by the imaging camera through the polarized light of the subject light reflected by the exit has been the subject
Imaging method, wherein a call.

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