JP2011081651A - Projection type video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection type video display device capable of improving convenience when explaining a projected image. <P>SOLUTION: In the scene of performing presentation by irradiating and indicating a pointer 80 to the projected image 100, when a user moves the indicating position of the pointer 80 clockwise (line T1) so as to surround a part of the projected image 100 on a screen SC, a luminous point P by the pointer 80 is moved clockwise to draw a circular track (line PT1) on the projected image 100 on the screen SC. A projector 10 detects the position information of the luminous point P on the projected image 100, and determines the indication information on highlighting and a target area to be highlighted on the basis of the detected position information. Then, the projector 10 generates an enhanced image R1 for which the target area inside the projected image 100 is enhanced (enlarged) according to the determined indication information, and combines the generated emphatic image R1 with the projected image 100 to be projected and displayed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projection display apparatus, and more particularly to a projection display apparatus capable of displaying a part of a projection image with emphasis.

  As a projection-type image display apparatus (hereinafter also referred to as a projector) capable of enlarging and projecting a part of a projected image, for example, Japanese Unexamined Patent Application Publication No. 2007-219217 (Patent Document 1) discloses an image by a user. An instruction information input unit that inputs instruction information indicating an emphasis instruction of a part of the information, a determination unit that determines the content of the emphasis instruction and the position of the part based on the instruction information, and based on the content and the position, A configuration is disclosed that includes an image generation unit that performs enhancement according to the content corresponding to a part and generates a zoom image in which an area including the part in the image is enlarged.

  In this patent document 1, the instruction information input unit inputs instruction information from a remote controller (remote controller). The determination unit determines whether the pointer icon display instruction button on the remote controller has been pressed for a predetermined time or more based on the instruction information. The image generation unit generates a zoom image including the pointer icon and enlarging the periphery of the pointer icon when the pointer icon display instruction button is kept pressed for a predetermined time or longer.

JP 2007-219217 A

  In the projector disclosed in Patent Document 1 described above, as an instruction information input unit, an effect button for instructing to emphasize a part of an image, a pointer icon display instruction button, and an ESC (ESCAPE) for ending the emphasis display A dedicated remote control provided with the above is used. That is, in the projector of Patent Document 1, highlighting is performed in conjunction with the operation of a dedicated remote controller by the user. Therefore, since the user cannot select a general-purpose laser pointer or the like as the pointing device, there is a problem that convenience is impaired.

  Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide a projection display apparatus capable of improving the convenience in explaining a projected image. It is.

  A projection display apparatus according to an aspect of the present invention is a projection display apparatus that projects an image on a screen, and detects position information of a position indicated by a user on the image projected on the screen. A determination unit that determines instruction information for highlighting the target region in the projection image based on the position information of the instruction position detected by the position detection unit, and the instruction information determined by the determination unit, An image generation unit that generates an image in which a target area in a projection image is emphasized, and an image projection unit that projects at least an image generated by the image generation unit.

  Preferably, the position detection unit detects position information of a bright spot by a pointer on the projected image.

  Preferably, the determination unit detects the movement speed and locus of the bright spot from the position information of the bright spot detected by the position detection unit, and provides instruction information based on the detected movement speed and locus of the bright spot. judge.

  Preferably, the determination unit determines that an emphasis instruction is given by the user when the moving speed of the detected bright spot is equal to or less than a predetermined threshold.

  Preferably, the projection display apparatus further includes an imaging unit for capturing an image projected on the screen. The position detection unit detects position information of a bright spot on the projection image from the projection image captured by the imaging unit. The imaging range of the captured image by the imaging unit has a predetermined range including the screen and the outer peripheral area.

  Preferably, the image generation unit generates an image in which the target area in the projection image is emphasized and the outline portion of the target area is clearly shown.

  According to the present invention, it is possible to improve convenience when explaining a projected image.

1 is a schematic configuration diagram of a projection display apparatus according to an embodiment of the present invention. It is a figure explaining an example of the highlight display in the projector according to this Embodiment. It is a figure which shows the structure of the projector in FIG. It is a flowchart explaining the emphasis process in this Embodiment. It is a flowchart explaining the detection processing of the positional information on the bright spot P in the enhancement processing according to the present embodiment. It is a flowchart explaining the determination process of the instruction information in the emphasis process according to the present embodiment. It is a figure explaining the structural example of the locus | trajectory pattern map of the bright spot P. FIG. It is a flowchart explaining the production | generation process of the projection image in the emphasis process according to this Embodiment. It is a figure explaining the other example of the highlight display in the projector according to this Embodiment. It is a figure explaining the other example of the highlight display in the projector according to this Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

FIG. 1 is a schematic configuration diagram of a projection display apparatus according to an embodiment of the present invention.
Referring to FIG. 1, a projection display apparatus (hereinafter also referred to as “projector”) 10 according to the present embodiment is a liquid crystal projector that projects an image using a liquid crystal device, and is provided on screen SC. The projected image 100 is displayed by projecting light of an image displayed by the liquid crystal device. The projection surface is not limited to the screen SC and may be a wall surface.

  The projector 10 includes an imaging unit 20 that captures an area including the projected image 100 via an imaging surface and generates a captured image. The imaging unit 20 includes an imaging device, an imaging device control unit that controls the imaging device such as acquisition of an output signal from each pixel of the imaging device, and an imaging optical system. For example, a CCD or CMOS can be used as the image sensor.

  Note that the imaging range of the imaging unit 20 is a range in which the projection range of the projected image 100 is sufficiently contained, and is a predetermined range including the screen SC and its outer peripheral area.

  The projector 10 further includes an input unit 60. The input unit 60 includes an input port for receiving an image signal supplied from an external signal supply device (not shown). The signal supply device includes a digital signal supply device that outputs a digital signal such as a DVD (Digital Versatile Disc) playback device or a Blue-Ray disk playback device, and an analog signal supply device that outputs an analog signal such as a computer. .

(Highlighting)
Here, when a presentation is performed using the projection image 100 by the projector 10, for example, a pointer 80 such as a laser pointer using a visible light laser is used to irradiate an arbitrary position of the projection image 100 on the screen SC. It is common practice to give instructions. The projector 10 according to the present embodiment provides a target in the projection image 100 according to the position (instructed position) pointed by the user with the pointer 80 in a scene where the projection image 100 is irradiated with the pointer 80 to give a presentation. Highlight the area.

  FIG. 2 is a diagram illustrating an example of highlighting in projector 10 according to the present embodiment.

  As shown in FIG. 2A, an arbitrary position is indicated by a pointer 80 on the screen SC on which the projected image 100 is displayed. The designated position of the pointer 80 in the projected image 100 is indicated by a bright spot P. Note that the bright spot P is a coordinate (X, Y) in the XY coordinate system in which the lower left corner of the display area of the projected image 100 is the origin (0, 0), the right direction is the X direction, and the upper direction is the Y direction. It shall be expressed.

  Here, when the user moves the pointing position of the pointer 80 clockwise so as to surround a part of the projected image 100 projected on the screen SC (line T1 in the figure), the projected image 100 on the screen SC is displayed. The bright spot P by the pointer 80 moves clockwise to draw a circular locus (line PT1 in the figure).

  The projector 10 detects position information of the bright spot P on the projected image 100 by a method described later, and determines the instruction information for highlighting and the target area to be highlighted based on the detected position information. Then, the projector 10 generates an enhanced image in which the target area in the projected image 100 is enhanced according to the determined instruction information. Then, the generated emphasized image is combined with the projected image 100 and projected and displayed.

  In the example of FIG. 2A, when the projector 10 detects the locus pattern PT1 of the bright spot P (clockwise circle) PT1 based on the positional information of the bright spot P, as shown in FIG. Using the region surrounded by the locus pattern PT1 of the designated position P in the image 100 as a target region, an enhanced image R1 in which the target region is enlarged is generated. Then, the projector 10 causes the generated emphasized image R1 to be displayed so as to overlap the projected image 100.

  At this time, as shown in FIG. 2 (b), by enclosing the outer peripheral portion of the enhanced image R1 with a frame line, it is indicated to the observer that the area surrounded by the frame line is highlighted. It can be clearly recognized.

  Hereinafter, image processing (hereinafter, also referred to as “enhancement processing”) for performing highlighting performed by projector 10 according to the present embodiment will be described.

(Projector configuration)
FIG. 3 is a diagram showing a configuration of the projector 10 in FIG.

  Referring to FIG. 3, projector 10 includes an image input unit 30, an image processing unit 32, an image generation unit 34, a light valve driving unit 36, a storage unit 38, a control unit 40, and an image projection unit 50. With.

  The projector 10 further includes an imaging unit 20 (FIG. 1), a captured image storage unit 22, and a position detection unit 24.

  The image projection unit 50 includes a light source 52, three liquid crystal light valves 54R, 54G, and 54B as light modulation devices, and a projection lens 56 as a projection optical system.

  The light source 52 is a discharge type light source lamp such as an ultra-high pressure mercury lamp or a metal halide lamp. Furthermore, the present invention is not limited to a discharge light source lamp, and various solid light emitting elements such as an LED, a laser diode, an organic EL (Electro Luminescence) element, and a silicon light emitting element may be employed.

  Light emitted from the light source 52 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue that are the three primary colors of light by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 54R, 54G, 54B, respectively.

  The liquid crystal light valves 54R, 54G, and 54B are configured by a liquid crystal panel or the like in which liquid crystal is sealed between a pair of transparent substrates. A driving voltage is applied to the inner surface of each transparent substrate for each minute region (pixel) with respect to the liquid crystal. Transparent electrodes (pixel electrodes) that can be applied are formed in a matrix in a rectangular region (pixel region).

  The light valve driving unit 36 applies a driving voltage corresponding to the input image signal to each pixel, so that each pixel is set to a light transmittance corresponding to the image signal. That is, the light emitted from the light source 52 is modulated by passing through the liquid crystal light valves 54R, 54G, and 54B, and image light corresponding to the image signal is formed for each color light. The formed image light of each color is combined for each pixel by a color combining optical system (not shown) to become image light indicating a color image, and then enlarged and projected onto the screen SC by the projection lens 56.

  The control unit 40 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) including a flash memory, a RAM (Random Access Memory) used for temporary storage of various data, and the like (none of which are shown). It functions as a computer. The control unit 40 performs overall control of the operation of the projector 10 by the CPU operating according to the control program stored in the storage unit 38.

  The image input unit 30 receives and outputs an image signal given from the input unit 60. The image input unit 30 has an ADC (Analog Digital Converter) function that converts a received digital video signal into an analog signal, an authentication function according to HDCP (High-Bandwidth Digital Content Protection System), and an encryption decryption function. HDCP is used to realize encryption of data transmitted according to HDMI (High Definition Multimedia Interface). As a result, it is possible to prevent content such as video signals transmitted on the digital transmission path from being illegally copied. Here, the digital transmission path is a path for transmitting data and signals according to HDMI, but may be a transmission path according to DVI (Digital Visual Interface).

  The image processing unit 32 processes the image signal output from the image input unit 30 into a signal for display and outputs the signal. Specifically, the image processing unit 32 writes the image signal from the image input unit 30 to a frame memory (not shown) for each frame (one screen) and reads an image stored in the frame memory. In the process of writing and reading, various image processes are performed to convert the input image signal to generate input image data representing an image to be projected.

  The image generation unit 34 generates enhanced image data in which a part of the projected image 100 is enhanced based on an instruction from the control unit 40. Specifically, the image generation unit 34 generates image data representing an emphasized image to be combined with the projected image 100 based on the instruction information for highlighting and the position information of the bright spot P by the pointer 80 by a method described later. To do. Then, the image generation unit 34 combines the image data input from the image processing unit 32 (input image data) and the generated enhanced image data. The synthesized composite image data is stored in a frame memory (not shown) in frame units (screen units) and output to the light valve driving unit 36 in frame units. If there is no emphasized image data to be combined, the image generation unit 34 outputs the image data input from the image processing unit 32 as it is. In addition, the image generation unit 34 rewrites the contents of the frame memory in accordance with sequentially input image signals so that the screen is switched at a predetermined frame frequency (for example, 60 Hz).

  The light valve driving unit 36 drives the liquid crystal light valves 54R, 54G, and 54B based on the frame unit image data input from the image generation unit 34. As a result, an image (image light) corresponding to the image data stored in the frame memory is projected from the image projection unit 50.

(Emphasis processing)
Hereinafter, enhancement processing according to the present embodiment will be described with reference to FIGS. FIG. 4 is a flowchart for explaining the emphasis process in the present embodiment. Note that the processing of each step in FIG. 4 is realized by executing a program stored in advance in the control unit 40.

  Referring to FIG. 4, in projector 10, light valve drive unit 36 drives liquid crystal light valves 54R, 54G, and 54B based on image data input from image generation unit 34 to project projected image 100 (see FIG. 4). Display). In parallel with the projection of the projection image 100, the imaging unit 20 captures the projection image 100 and acquires captured image data (step S100). Captured image data captured by the imaging unit 20 at a constant frame rate is stored in the captured image storage unit 22.

The position detection unit 24 uses positional information (coordinates P (X ₁ , Y ₁ ), P () indicating the XY coordinates of the bright spot P by the pointer 80 from the captured image data stored in the captured image storage unit 22 for each fixed frame rate. X _{2, Y 2)} ···) for detecting a (step S200).

  The instruction information determination unit 26 detects the moving speed and locus pattern of the bright spot P based on the position information of the bright spot P detected by the position detection unit 24. Then, the instruction information determination unit 26 determines the instruction information for highlighting based on the detected moving speed and locus pattern of the bright spot P, and outputs the determined instruction information to the control unit 40 (step S300).

  In accordance with the instruction information transmitted from the control unit 40, the image generation unit 34 generates emphasized image data in which the target area specified by the locus pattern of the bright spot P is highlighted (for example, enlarged). Then, the image generation unit 34 performs data processing on the background portion of the generated emphasized image data so that the image data input from the image processing unit 32 is combined, and the processed composite image data is converted into a light valve driving unit. To 36. As a result, the composite image data is projected from the image projection unit 50 (step S400).

Next, the process of each step in the enhancement process shown in FIG. 4 will be described in detail.
(Detection of location information)
FIG. 5 is a flowchart for describing detection processing of position information of bright spot P in the enhancement processing according to the present embodiment.

  Referring to FIG. 5, first, the position detection unit 24 reads out captured image data captured at every fixed frame rate by the imaging unit 20 stored in the captured image storage unit 22 (step S210), and inputs Input image data generated based on the image signal input to the unit 60 is acquired from the image processing unit 32 (step S220).

Next, the position detection unit 24 detects the position information of the bright spot P by comparing the captured image data with the input image data (step S230). Specifically, the position detection unit 24 captures an image corresponding to a display area of a projected image based on input image data from captured image data corresponding to an imaging range stored for each fixed frame rate in the captured image storage unit 22. Extract image data. Then, the position detection unit 24 detects the coordinates P (X ₁ , Y ₁ ), P (X ₂ , Y ₂ ),... Of the bright spot P from the display area of the projected image stored for each fixed frame. That is, the position detection unit 24 extracts captured image data corresponding to the display area of the projected image from the captured image data corresponding to the imaging range of the imaging unit 20, and the brightness on the projected image is extracted from the extracted captured image data. The coordinate P (X, Y) of the point P is detected.

  Here, as described above, the imaging range of the imaging unit 20 is a range in which the projection range (display area) of the projected image 100 is sufficiently contained, and is a predetermined range including the screen SC and the area of the outer peripheral portion thereof. Is set to Thereby, even when the bright spot P protrudes from the screen SC during the operation of the pointer 80, the position detector 24 can detect the position information of the bright spot P.

(Determination of instruction information)
FIG. 6 is a flowchart illustrating instruction information determination processing in emphasis processing according to the present embodiment.

Referring to FIG. 6, the instruction information determination unit 26 includes position information (coordinates P (X ₁ , Y ₁ ), P (X ₂ , Y ₂ )... Of the bright spot P detected by the position detection unit 24. ) Is acquired (step S310), the movement vector of the bright spot P is calculated (step S320).

  The instruction information determination unit 26 calculates the moving speed of the bright spot P based on the size of the moving vector calculated in step S320. Then, the instruction information determination unit 26 determines whether or not the calculated moving speed of the bright spot P is equal to or less than a predetermined threshold (step S330).

  When it is determined that the moving speed of the bright spot P exceeds a predetermined threshold value (NO determination in step S330), the instruction information determination unit 26 determines that highlighting is not instructed by the user, and a series of The highlighting process ends. On the other hand, when it is determined that the moving speed of the bright spot P is equal to or lower than the predetermined threshold (YES in step S330), the instruction information determination unit 26 determines that the highlighting instruction by the user is instructed. . In this case, the instruction information determination unit 26 proceeds to step S340, and determines instruction information for highlighting.

  In this way, in step S330, it is determined whether or not highlighting is instructed based on the moving speed of the bright spot P. With such a configuration, when the user unintentionally moves the indicated position of the pointer 80 due to the influence of hand tremors or camera shake, or simply irradiates the pointer 80 at a desired position in the projected image 100. It is possible to prevent the highlighting from being erroneously executed, for example. In other words, from the viewpoint of exhibiting such an effect, the predetermined threshold value in step S330 identifies the case where the user operates the pointer 80 with the intention of highlighting and the other case. Is set to a value that can

  Then, the instruction information determination unit 26 determines the instruction information by further combining the determination of the movement pattern of the bright spot P in step S330 with the determination of the locus pattern of the bright spot P. With such a configuration, even when the moving speed of the bright spot P is equal to or lower than a predetermined threshold, it is ensured that the highlighting is erroneously performed when the user does not intend to highlight the highlighting. Can be prevented.

  Specifically, the instruction information determination unit 26 stores the movement vectors calculated in step S320 one after another in a time series in a storage unit (not shown) (step S340). After storing the movement vector in the storage unit, the instruction information determination unit 26 associates the locus pattern of the bright spot P extracted from the plurality of movement vectors stored in the storage unit with the instruction information in advance. The stored trajectory pattern map is collated (step S360). At this time, the instruction information determination unit 26 determines whether or not there is instruction information that matches the extracted locus pattern of the bright spot P (see FIG. 7) among the plurality of instruction information set in the locus pattern map. Is determined (step S370).

  When it is determined that there is instruction information that matches the locus pattern of the bright spot P (YES in step S370), the instruction information determination unit 26 highlights the instruction information that matches the locus pattern. The instruction information is specified (step S380) and transmitted to the control unit 40. On the other hand, when it is determined that there is no instruction information that matches the locus pattern of the bright spot P (NO determination in step S370), the instruction information determination unit 26 determines that the user does not intend to highlight. Then, the instruction information determination process ends.

FIG. 7 is a diagram illustrating a configuration example of the locus pattern map of the bright spot P.
Referring to FIG. 7, in the trajectory pattern map, each trajectory pattern is represented by a line segment with an arrow, and instruction information is set in association with each trajectory pattern. For example, “enlarged display of enclosed area” is set for instruction information corresponding to a clockwise circular locus pattern. The “enclosed area” is an area surrounded by a circular trajectory pattern in the display area of the projected image, and corresponds to a target area to be highlighted according to the instruction information.

  Therefore, when the instruction information “enlarged display of enclosed area” is determined from the locus pattern of the bright spot P (clockwise circle), as shown in FIG. Using the region surrounded by the trajectory pattern PT1 as a target region, an enhanced image R1 in which the target region is enlarged is generated, and the generated enhanced image R1 is displayed so as to be superimposed on the projected image 100.

  As described above, in the instruction information determination process according to the present embodiment, the movement of the bright spot P on the projected image 100 is linked to the operation of the designated position of the pointer 80 by the user by the moving speed and the trajectory pattern. Then, the instruction content of the highlight display from the user is determined from the operation content. Thereby, it is possible to realize desired highlighting without using a dedicated remote controller provided with a specific button for instructing highlighting.

(Projection image generation)
FIG. 8 is a flowchart illustrating a projection image generation process in the enhancement process according to the present embodiment.

Referring to FIG. 8, the image generation unit 34 first acquires the instruction information determined by the instruction information determination unit 26 through the control unit 40 (step S410), and the bright spot P detected by the position detection unit 24. Position information (coordinates P (X ₁ , Y ₁ ), P (X ₂ , Y ₂ )...) Is acquired (step S420).

  Next, the image generation unit 34 determines whether or not the acquired instruction information is “end of enhancement processing (effect off)” (step S430). When it is determined that the acquired instruction information is “end of enhancement processing” (YES determination in step S430), the image generation unit 34 directly drives the image data input from the image processing unit 32 as a light valve. To the unit 36. Accordingly, an image (corresponding to the projected image 100) based on the input image data is projected (displayed) on the screen SC (step S470).

  On the other hand, when it is determined that the acquired instruction information is not “end of enhancement processing” (NO determination in step S430), the image generating unit 34 determines the position of the instruction information and the detected bright spot P. Based on the information, image data representing an emphasized image to be combined with the projected image 100 is generated (step S440). For example, when the instruction information is “enlarged display of enclosed area”, the image generation unit 34 enlarges the image of the target area specified from the position information of the bright spot P to a predetermined display size (emphasized image). ) Is generated.

  Then, the image generation unit 34 synthesizes the input image data given from the image processing unit 32 and the generated enhanced image data (step S450). The synthesized composite image data is stored in a frame memory (not shown) in frame units (screen units) and output to the light valve driving unit 36 in frame units. Thereby, the emphasized image is displayed on the screen SC so as to be superimposed on the projected image 100.

(Highlighting)
Finally, details of the instruction information for emphasis processing set in the locus pattern map of FIG. 7 will be described with reference to FIGS. 9 and 10.

  FIG. 9 is a diagram illustrating another example of highlighting in projector 10 according to the present embodiment.

  As shown in FIG. 9A, an arbitrary position is indicated by a pointer 80 on the screen SC on which the projected image 100 is displayed. The designated position of the pointer 80 in the projected image 100 is indicated by a bright spot P.

  Here, when the user moves the pointing position of the pointer 80 counterclockwise so as to surround a part of the projected image 100 projected on the screen SC (line T2 in the figure), the projected image 100 on the screen SC is displayed. The bright spot P by the pointer 80 moves counterclockwise to draw a circular locus (line PT2 in the figure).

  In the projector 10, the instruction information determination unit 26 uses the method described above, based on the position information of the bright spot P detected by the position detection unit 24, the moving speed and locus pattern (counterclockwise circular shape) PT2 of the bright spot P. Is detected. When the instruction information determination unit 26 determines that the highlight display is instructed from the moving speed of the bright spot P, the instruction information determination unit 26 collates the detected trace pattern PT2 of the bright spot P with the trace pattern map (FIG. 7). Thus, the instruction information “display the enclosed area in full screen” is determined.

  As a result, as shown in FIG. 9B, the image generation unit 34 uses the area surrounded by the locus pattern PT2 in the projected image 100 as the target area, and the target area is enlarged to the display size of the entire screen. The enhanced image R2 is generated, and the generated enhanced image R2 is displayed so as to be superimposed on the projected image 100.

  FIG. 10 is a diagram illustrating another example of highlighting in projector 10 according to the present embodiment.

  Referring to FIG. 10A, when the user moves the indicated position of pointer 80 so as to surround a part of projection image 100 projected on screen SC n times (n is a natural number of 2 or more) in a rectangular shape. On the projected image 100 of the screen SC (line T3 in the figure), the bright spot P by the pointer 80 moves to draw a trajectory consisting of n rectangles (line PT3 in the figure).

  In this case, in the projector 10, the instruction information determination unit 26 uses the method described above, based on the position information of the bright spot P detected by the position detection unit 24, the moving speed of the bright spot P and the locus pattern (n rectangles). ) Detect PT3. When the instruction information determination unit 26 determines that the highlight display is instructed from the moving speed of the bright spot P, the instruction information determination unit 26 collates the detected trace pattern PT3 of the bright spot P with the trace pattern map (FIG. 7). As a result, the instruction information “display the enclosed area with color” is determined.

  As a result, as shown in FIG. 10B, the image generation unit 34 uses the region surrounded by the trajectory pattern PT3 in the projection image 100 as a target region, and enhances by adding a predetermined color to the image of the target region. An image R3 is generated, and the generated enhanced image R3 is displayed so as to overlap the projected image 100.

  In addition, when it is desired to end the highlighting as described above, an “end mark” is displayed superimposed on one corner of the emphasized image, and the user irradiates the end mark with a pointer 80 for a predetermined period of time. To do. In this case, the instruction information determination unit 26 determines instruction information “end of enhancement process (effect off)” based on the position information of the bright spot P by referring to the locus pattern map of FIG.

  Alternatively, when the user moves the designated position of the pointer 80 so as to completely fill the emphasized image, or the designated position of the pointer 80 is moved in the normal direction (Z direction) of the screen SC. In such a case, the instruction information determination unit 26 may be configured to determine the instruction information “end of enhancement processing (effect off)” based on the position information of the bright spot P.

  Note that the combination of the trajectory pattern and the instruction information shown in the trajectory pattern map of FIG. 7 is an example of emphasis display, and is not limited to this, and various emphasis display can be performed by other combinations. It is clear.

  As described above, according to the projection display apparatus according to the embodiment of the present invention, the target in the projection image corresponding to the position pointed by the user with the pointer in a scene where the pointer is directed to the projection image and the presentation is performed. The area can be highlighted. Therefore, unlike the conventional projector, a dedicated remote control for highlighting is not required, and desired highlighting can be performed according to the moving speed and locus pattern of the pointing position of the general-purpose pointer. As a result, it is possible to improve convenience when explaining the projected image.

  In this embodiment, a liquid crystal projector is used as the projector, but the present invention is not limited to this. For example, the technology of the present invention may be applied to other projectors such as a DLP (Digital Light Processing) (registered trademark) projector.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

  DESCRIPTION OF SYMBOLS 10 Projector, 20 Imaging part, 22 Captured image storage part, 24 Position detection part, 26 Instruction information determination part, 30 Image input part, 32 Image processing part, 34 Image generation part, 36 Light valve drive part, 38 Storage part, 40 Control unit, 50 image projection unit, 52 light source, 54R, 54G, 54B liquid crystal light valve, 56 projection lens, 60 input unit, 80 pointer, 100 projection image, R1-R3 weighted image, SC screen.

Claims (6)

A projection display device that projects an image onto a screen,
A position detection unit for detecting position information of a position designated by a user on the image projected on the screen;
A determination unit that determines instruction information for highlighting a target area in a projection image based on position information of the instruction position detected by the position detection unit;
An image generation unit that generates an image in which a target area in the projection image is emphasized according to the instruction information determined by the determination unit;
A projection display apparatus comprising: an image projection unit that projects at least an image generated by the image generation unit.   The projection display apparatus according to claim 1, wherein the position detection unit detects position information of a bright spot by a pointer on a projection image.   The determination unit detects the movement speed and locus of the bright spot from the position information of the bright spot detected by the position detection unit, and based on the detected movement speed and locus of the bright spot, The projection display apparatus according to claim 2, wherein the instruction information is determined.   The projection display apparatus according to claim 3, wherein the determination unit determines that the user has given the enhancement instruction when the detected moving speed of the bright spot is equal to or less than a predetermined threshold. An image capturing unit for capturing an image projected on the screen;
The position detection unit detects position information of the bright spot on the projection image from the projection image captured by the imaging unit;
The projection display apparatus according to claim 2, wherein an imaging range of a captured image by the imaging unit has a predetermined range including the screen and an outer peripheral area.   The projection type according to any one of claims 1 to 5, wherein the image generation unit generates an image that emphasizes a target area in the projection image and clearly shows an outline portion of the target area. Video display device.

Images