JP2016071864A - Projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector apparatus capable of touch operation without generating any error relative to an intended position of a user.SOLUTION: The projector apparatus includes: a projection unit that projects output images; a detection part that detects a distance information from a projection plane on which the output images are projected to the projection unit, and spatially detects an instruction operation made by a user; and a control unit that performs a geometric correction on an original image with respect to the output images by calculating a spatial position to which each of the pixels of the original image are projected based on the distance information. The control unit connects the position instructed by the instruction operation and the pixel positions on the original image based on the calculation result.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a projector device capable of performing a gesture operation.

  Patent Document 1 is provided with a plurality of cameras, which can perform focus adjustment, tilt projection, and correction of the distortion of the projected image caused by the shape of the surface of the projection target. Disclosed is a projector that performs correction in a combined manner. In addition, a projector capable of detecting a pointing position and performing an operation according to a projected icon is disclosed.

JP 2005-229415 A

  However, Patent Document 1 projects a plurality of target points on a screen and approximately determines the target point closest to the pointing position as the pointing position coordinates. An error occurs in the pointing position recognized by the projector.

  The present disclosure provides a projector device that can perform a touch operation without causing an error with respect to a position intended by a user by associating a touched position with an original image position on a one-to-one basis.

  A projector device according to the present disclosure includes a projection unit that projects an output image, a detection unit that detects distance information from a projection plane on which the output image is projected to the projection unit, and spatially detects an instruction operation by a user. A control unit that calculates a spatial position on which each pixel of the original image is projected based on the distance information and geometrically corrects the original image into an output image. The control unit associates the position indicated by the instruction operation with the position of the pixel in the original image based on the calculation result.

  The projector apparatus according to the present disclosure can be touch-operated without causing an error with respect to the position intended by the user even in the case of a geometrically corrected projection image.

Image of the projector device projecting an image on the wall Image diagram of projector device projecting image on table Block diagram showing the electrical configuration of the projector device Block diagram showing the electrical configuration of the distance detector The figure for demonstrating the distance information acquired by the distance detection part Block diagram showing optical configuration of projector apparatus The figure for demonstrating operation | movement of a projector apparatus Flowchart for explaining the operation of the projector device Flowchart for explaining the operation of the projector device Flowchart for explaining the operation of the projector device

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIGS.

[1-1. Constitution]
[1-1-1. overall structure]
The projector device 100 equipped with the user interface device 200 according to the present disclosure will be described.

  An outline of an image projecting operation by the projector device 100 will be described with reference to FIGS. 1 and 2. FIG. 1 is an image diagram in which the projector device 100 projects an image on a wall 140a as a projection surface 140. FIG. FIG. 2 is an image diagram in which the projector apparatus 100 projects an image onto a table 140b as the projection plane 140.

  As shown in FIGS. 1 and 2, the projector device 100 includes a projection unit 170, a drive unit 110, and a power supply unit 120. The projection unit 170 and the power supply unit 120 are connected via the drive unit 110. The power supply unit 120 is fixed to the wiring duct 130. Wirings electrically connected to each unit constituting the projection unit 170 and the driving unit 110 are connected to a power source such as an outlet via the power source unit 120 and the wiring duct 130. As a result, power is supplied to the projector device 100 and the drive unit 110. The projection unit 170 has an opening 101. The projection unit 170 projects an image through the opening 101.

  The drive unit 110 can be driven to change the projection direction of the projection unit 170. The drive unit 110 can drive the projection direction of the projection unit 170 so as to be in the direction of the wall 140a as shown in FIG. Thereby, the projection part 170 can project the projection image 152 with respect to the wall 140a. Similarly, the drive unit 110 can drive the projection direction of the projection unit 170 to be the direction of the table 140b as shown in FIG. Thereby, the projection part 170 can project the projection image 152 with respect to the table 140b. The drive unit 110 may be driven based on a user's manual operation, or may be automatically driven according to a detection result of a predetermined sensor. Further, the image projected onto the wall 140a and the image projected onto the table 140b may have different contents or the same.

  The projector device 100 is equipped with a user interface device 200. Thereby, the projector device 100 can provide the user with an operation feeling as if the projection area 141 of the image projected on the projection surface 140 (wall 140a, table 140b) is a touch panel. That is, the user can perform a pointing operation by touching the image projected on the projection surface 140 with a finger or the like.

[1-1-2. Configuration of projector apparatus]
FIG. 3 is a block diagram showing an electrical configuration of projector apparatus 100. The projector device 100 includes a user interface device 200, a light source unit 300, an image generation unit 400, and a projection optical system 500. The user interface device 200 includes a control unit 210, a memory 220, and a distance detection unit 230.

  The control unit 210 is a semiconductor element that controls the entire projector device 100. That is, the control unit 210 controls operations of each unit (memory 220, distance detection unit 230), the light source unit 300, the image generation unit 400, and the projection optical system 500 that configure the user interface device 200. The control unit 210 may be configured only by hardware, or may be realized by combining hardware and software.

  The memory 220 is a storage element that stores various types of information. The memory 220 includes a flash memory or a ferroelectric memory. The memory 220 stores a control program or the like for controlling the projector device 100 (including the user interface device 200). The memory 220 stores various information supplied from the control unit 210.

  The distance detection unit 230 is composed of, for example, a TOF (Time-of-Flight) sensor, and linearly detects the distance to the opposing surface. When the distance detection unit 230 faces the wall 140a, the distance from the distance detection unit 230 to the wall 140a is detected. Similarly, when the distance detection unit 230 faces the table 140b, the distance from the distance detection unit 230 to the table 140b is detected.

  FIG. 4A is a block diagram illustrating an electrical configuration of the distance detection unit 230. As shown in FIG. 4A, the distance detection unit 230 includes an infrared light source unit 231 that irradiates infrared detection light, and an infrared light reception unit 232 that receives infrared detection light reflected by a facing surface. . The infrared light source unit 231 irradiates the infrared detection light through the opening 101 so as to be diffused over the entire surface. The infrared light source unit 231 uses, for example, infrared light having a wavelength of 850 nm to 950 nm as infrared detection light.

  The control unit 210 stores the phase of the infrared detection light emitted from the infrared light source unit 231 in the memory 220. When the opposing surfaces are not equidistant from the distance detection unit 230 and have an inclination or a shape, the plurality of pixels arranged on the imaging surface of the infrared light receiving unit 232 receive reflected light at different timings. Since the light is received at different timings, the phase of the infrared detection light received by the infrared light receiving unit 232 is different for each pixel. The control unit 210 stores in the memory 220 the phase of the infrared detection light received by each pixel by the infrared light receiving unit 232.

  The control unit 210 reads from the memory 220 the phase of the infrared detection light emitted by the infrared light source unit 231 and the phase of the infrared detection light received by each pixel by the infrared light receiving unit 232. The control unit 210 can measure the distance from the distance detection unit 230 to the facing surface based on the phase difference between the infrared detection light emitted by the distance detection unit 230 and the received infrared detection light.

  FIG. 4B is a diagram for explaining the distance information acquired by the distance detection unit 230 (infrared light receiving unit 232). The distance detection unit 230 detects the distance for each pixel constituting the infrared image 153 by the received infrared detection light. Thereby, the control unit 210 can obtain the detection result of the distance for the entire field angle of the infrared image 153 received by the distance detection unit 230 in units of pixels. In the following description, as shown in FIG. 4B, the X-axis is taken in the horizontal direction of the infrared image 153 and the Y-axis is taken in the vertical direction. The Z axis is taken in the detected distance direction. Based on the detection result of the distance detection unit 230, the control unit 210 can obtain XYZ triaxial coordinates (X, Y, Z) for each pixel constituting the infrared image 153. That is, the control unit 210 can acquire distance information based on the detection result of the distance detection unit 230.

  In the above, the TOF sensor is exemplified as the distance detection unit 230, but the present disclosure is not limited to this. That is, as in a random dot pattern, a known pattern may be projected and a distance may be calculated from the deviation of the pattern, or a parallax obtained by a stereo camera may be used.

  Next, the configuration of the light source unit 300, the image generation unit 400, and the projection optical system 500, which are members other than the user interface device 200 among the members mounted on the projector device 100, will be described with reference to FIG. FIG. 5 is a block diagram showing an optical configuration of projector device 100. As illustrated in FIG. 5, the light source unit 300 supplies light necessary for generating the projection image 152 to the image generation unit 400. The image generation unit 400 supplies the generated image to the projection optical system 500. The projection optical system 500 performs optical conversion such as focusing and zooming on the image supplied from the image generation unit 400. The projection optical system 500 faces the opening 101, and an image is projected from the opening 101. The projection optical system 500 corresponds to the projection unit 170 shown in FIGS. 1 and 2.

  First, the configuration of the light source unit 300 will be described. As shown in FIG. 5, the light source unit 300 includes a semiconductor laser 310, a dichroic mirror 330, a λ / 4 plate 340, a phosphor wheel 360, and the like.

  The semiconductor laser 310 is a solid light source that emits S-polarized blue light having a wavelength of 440 nm to 455 nm, for example. S-polarized blue light emitted from the semiconductor laser 310 is incident on the dichroic mirror 330 via the light guide optical system 320.

  The dichroic mirror 330 has, for example, a high reflectance of 98% or more for S-polarized blue light having a wavelength of 440 nm to 455 nm, while P-polarized blue light having a wavelength of 440 nm to 455 nm and green having a wavelength of 490 nm to 700 nm. It is an optical element having a high transmittance of 95% or more for light to red light regardless of the polarization state. The dichroic mirror 330 reflects the S-polarized blue light emitted from the semiconductor laser 310 in the direction of the λ / 4 plate 340.

  The λ / 4 plate 340 is a polarizing element that converts linearly polarized light into circularly polarized light or converts circularly polarized light into linearly polarized light. The λ / 4 plate 340 is disposed between the dichroic mirror 330 and the phosphor wheel 360. The S-polarized blue light incident on the λ / 4 plate 340 is converted into circularly-polarized blue light and then irradiated onto the phosphor wheel 360 via the lens 350.

  The phosphor wheel 360 is an aluminum flat plate configured to be capable of high speed rotation. On the surface of the phosphor wheel 360, a B region which is a diffuse reflection surface region, a G region coated with a phosphor emitting green light, and an R region coated with a phosphor emitting red light. A plurality of and are formed. The circularly polarized blue light applied to the region B of the phosphor wheel 360 is diffusely reflected and reenters the λ / 4 plate 340 as circularly polarized blue light. The circularly polarized blue light incident on the λ / 4 plate 340 is converted into P-polarized blue light and then incident on the dichroic mirror 330 again. At this time, since the blue light incident on the dichroic mirror 330 is P-polarized light, it passes through the dichroic mirror 330 and enters the image generation unit 400 via the light guide optical system 370.

  The blue light applied to the G region of the phosphor wheel 360 excites the phosphor applied on the G region to emit green light. Green light emitted from the G region is incident on the dichroic mirror 330. At this time, the green light incident on the dichroic mirror 330 passes through the dichroic mirror 330 and enters the image generating unit 400 via the light guide optical system 370. Similarly, the blue light applied to the R region of the phosphor wheel 360 excites the phosphor applied on the R region to emit red light. Red light emitted from the R region enters the dichroic mirror 330. At this time, the red light incident on the dichroic mirror 330 passes through the dichroic mirror 330 and enters the image generation unit 400 via the light guide optical system 370.

  Since the phosphor wheel 360 rotates at high speed, blue light, green light, and red light are emitted from the light source unit 300 to the image generation unit 400 in a time-sharing manner.

  The image generation unit 400 generates a projection image corresponding to the video signal supplied from the control unit 210. The image generation unit 400 includes a DMD (Digital-Mirror-Device) 420 and the like. The DMD 420 is a display element in which a large number of micromirrors are arranged in a plane. The DMD 420 deflects each of the arranged micromirrors according to the video signal supplied from the control unit 210 to spatially modulate the incident light.

  Blue light, green light, and red light are emitted from the light source unit 300 to the image generation unit 400 in a time-sharing manner. The DMD 420 repeatedly receives blue light, green light, and red light that are emitted in a time division manner through the light guide optical system 410 in order. The DMD 420 deflects each of the micromirrors in synchronization with the timing at which light of each color is emitted. Thereby, the image generation unit 400 generates a projection image 152 corresponding to the video signal. The DMD 420 deflects the micromirror according to the video signal into light that travels to the projection optical system 500 and light that travels outside the effective range of the projection optical system 500. Thereby, the image generation unit 400 can supply the generated projection image 152 to the projection optical system 500.

  The projection optical system 500 includes an optical member 510 such as a focus lens or a zoom lens. The projection optical system 500 enlarges the light traveling from the image generation unit 400 and projects it onto the projection surface 140.

  In the above description, the configuration of the DLP (Digital-Light-Processing) method using the DMD 420 is described as an example of the projector device 100, but the present disclosure is not limited thereto. That is, the projector apparatus 100 may employ a liquid crystal configuration.

  In the above description, the configuration using the single plate method in which the light source is time-divided using the phosphor wheel 360 is described as an example of the projector device 100, but the present disclosure is not limited thereto. That is, the projector device 100 may employ a three-plate configuration including various light sources of blue light, green light, and red light.

  In the above description, the blue light source for generating the projection image 152 and the infrared light source for measuring the distance are described as separate units, but the present disclosure is not limited thereto. That is, a unit in which a blue light source for generating the projection image 152 and an infrared light source for measuring the distance may be integrated. If the three-plate method is adopted, a unit in which the light sources of the respective colors and the infrared light source are integrated may be used.

[1-2. Operation and effect]
The operation of the user interface device 200 mounted on the projector device 100 configured as described above will be described below.

  When the projector device 100 projects an image on a surface that does not face the projector device 100, the image is distorted when projected without geometric correction. When projecting an image similar in shape to the shape of the original image 150 (an image input to the control unit 210), the control unit 210 needs to perform geometric correction processing on the original image 150. Further, when the user performs a touch operation on the projected image 152 that has been subjected to geometric correction processing using the user's own finger as a pointing means, the touched position (touch position) and the position in the plane of the original image 150 It is necessary to calculate an exact correspondence relationship.

  Hereinafter, the operation of the projector apparatus 100 will be described with reference to FIGS.

[1-2-1. Process for converting the original image into a projected image after geometric correction]
<Calculation of equation representing infrared image in sensor coordinate system>
FIG. 6 is a diagram for explaining the operation of the user interface device 200 of the projector device 100, and FIG. 7 is a flowchart of the operation. First, the control unit 210 determines the plane coordinates of the point A on the infrared image 153 in the distance detection unit 230 indicating the center point O of the projection image 152 (projection region 141), and is spaced from the point A by a constant interval (equal distance). The three target points on the infrared image 153 at are determined. This target point may be a number of 3 or more. Then, the control unit 210 obtains the three-dimensional coordinates (X, Y, Z) of the three target points in the coordinate system (sensor coordinate system) using the distance detection unit 230 as the origin (reference) from the distance detection unit 230. Calculation is performed based on the obtained depth information (distance information) (step S1). Here, the plane coordinates on the infrared image 153 mean the coordinates of the pixels constituting the infrared image 153 shown in FIG. 4B, and the three-dimensional coordinates of the sensor coordinate system are based on the distance detection unit 230. In this case, the coordinates on the projection plane 140 are meant.

  Next, the control unit 210 uses the three-dimensional coordinates of the three target points calculated in step S1 to determine the projection plane 140 projected by the projector device 100 as an equation of a plane having a normal vector n in the sensor coordinate system. (Step S2).

<Calculation of projection area in sensor coordinate system>
The control unit 210 determines predetermined two points B and C on the infrared image 153 in order to calculate a vector indicating the width direction of the projection image, and stores the plane coordinates in the memory 220 (step S3). However, the predetermined two points are determined by the control unit 210 according to an arbitrary application of the projector device 100.

  Next, the control unit 210 uses the plane coordinates of the two points B and C on the infrared image 153 stored in the memory 220 and the depth information obtained from the distance detection unit 230 as input values, and the 3 of the two points B and C. Dimensional coordinates are calculated (step S4).

  As shown in FIG. 6, the control unit 210 calculates a three-dimensional unit vector w indicating the width direction of the projection image 152 from the three-dimensional coordinates of the two points B and C obtained in step S4. The control unit 210 calculates a three-dimensional unit vector h indicating the height direction of the projection image 152 from the outer product of the vector w and the normal vector n of the projection plane 140 calculated in step S2 (step S5). The control unit 210 may first calculate a three-dimensional unit vector h indicating the height direction based on the three-dimensional coordinates of the two points B and C. In that case, the control unit 210 determines the three-dimensional unit indicating the width direction of the projection image 152 from the outer product of the three-dimensional unit vector h indicating the height direction of the projection image 152 and the normal vector n of the projection plane 140. Vector w is calculated.

  The control unit 210 stores the plane coordinates of the point A on the infrared image 153 corresponding to the center point O of the projection image 152 and the size W0 in the width direction and the size H0 in the height direction of the projection image 152 (projection region 141). Save to 220. The coordinates of the point A and the size W0 in the width direction and the size H0 in the height direction are determined by the control unit 210 by an arbitrary application of the projector device 100. Based on the depth information obtained from the distance detection unit 230, the control unit 210 calculates the plane coordinates of the point A on the infrared image 153 stored in the memory 220 as the three-dimensional coordinates of the sensor coordinate system (step S6).

  The control unit 210 forms an image projection area 141 in the sensor coordinate system from the unit vector w, the unit vector h, the width direction size W0, and the height direction size H0 starting from the three-dimensional coordinates of the point A4. The three-dimensional coordinates of the vertex are calculated (step S7).

<Conversion from sensor coordinate system to projector coordinate system>
The projector device 100 outputs an output image 151 obtained by geometrically correcting the original image 150 from the projection unit 170 to the projection surface 140. Therefore, the control unit 210 needs to convert the coordinates of the four vertices indicating the projection area 141 in the sensor coordinate system calculated in step S7 into the projector coordinate system, and generate the output image 151 from the original image 150 in the projector coordinate system. is there.

  The memory 220 holds in advance parameters indicating the relative posture relationship between the projector coordinate system and the sensor coordinate system. The control unit 210 converts the coordinates of the four vertices that define the projection area in the sensor coordinate system calculated in step S7 shown in FIG. 7 into coordinates in the projector coordinate system (step S8).

[1-2-2. Output image generation process]
Next, the step of generating the output image 151 to be projected by the projector device 100 will be described with reference to FIG.

  In the projector coordinate system, the control unit 210 sets a virtual projector surface 142 having an arbitrary width and height based on the number of pixels in the width direction and the height direction held by the projector device 100 and the angle of view (step). S9). The projector surface 142 is a surface for setting the output image 151.

  Next, the control unit 210 calculates an equation of the projection plane 140 in the projector coordinate system from the coordinates of the four vertices indicating the projection area 141 in the projector coordinate system obtained in step S8 of FIG. 7 (step S10).

  Next, each pixel PP (i, j) on the projector surface 142 is converted into three-dimensional coordinates (i, j, k) in the projector coordinate system. Then, the three-dimensional coordinates (i, j, k) with respect to each pixel converted into the coordinates of the projector coordinate system are subjected to back projection conversion, and each point Prj (s, t, u) on the projection plane 140 corresponding thereto is converted. Three-dimensional coordinates are calculated. Then, the coordinates of each pixel PP (i, j) of the output image 151 are associated with the three-dimensional coordinates (s, t, u) of the projector coordinate system on the projection plane 140 (step S11).

  Next, the control unit 210 determines the distance W1 in the width direction between one vertex of the four vertices of the projection area 141 calculated in step S8 in FIG. 7 and the point Prj (s, t, u) on the projection plane 140. Then, the ratio Wr and Hr of the distance H1 in the height direction and the size W0 in the width direction and the size H0 in the height direction of the projection area formed by the four vertices calculated in step S8 are calculated. That is, the ratio Wr = the width direction distance W1 / the width direction size W0, and the ratio Hr = the height direction distance H1 / the height direction size H0. Since the original image 150 is projected on the projection area 141 surrounded by the four vertices, the control unit 210 determines the ratios Wr and Hr and the number of pixels in the width direction and the height direction of the original image 150. The point Prj (s, t, u) on the projection plane 140 is associated with the pixel Pin (x, y) of the original image 150 (step S12).

  Then, the control unit 210 obtains a correspondence relationship between the pixel PP (i, j) of the output image 151 and the pixel Pin (x, y) of the original image 150 (step S13). The control unit 210 substitutes the RGB level of the corresponding pixel Pin (x, y) of the original image 150 into the RGB level (pixel value) of the pixel PP (i, j) of the output image 151, thereby making the original image 150. An output image 151 obtained by geometrically correcting the image is generated.

  As a result, it is possible to project an image without distortion even on a projection surface that is not directly facing.

[1-2-3. Coordinate calculation of touch position in touch operation]
The operation when the user performs an instruction operation such as touching the image projected on the projection surface 140 will be described using the flowchart of FIG.

  The control unit 210 acquires the coordinates of the indication point Sir (X, Y) in the infrared image corresponding to the position where the user performs a touch operation using the user's own finger as a pointing means. Then, the control unit 210 calculates the three-dimensional coordinates (X, Y, Z) in the sensor coordinate system from the designated point Sir (X, Y) of the infrared image representing the touch position based on the depth information obtained from the distance detection unit 230. Calculate (step S14).

  Next, the control unit 210 converts the designated point Sir (X, Y, Z) in the sensor coordinate system to the designated point Sp (S, T, U) in the projector coordinate system (step S15).

  Next, the control unit 210 calculates the indication point Sp (S, T, U) obtained in step S15 and one vertex of the four vertices indicating the projection area in the projector coordinate system calculated in step S8 of FIG. A distance W2 in the width direction and a distance H2 in the height direction are calculated. Then, the control unit 210 calculates the ratios Ws and Hs of the calculated distance W2 in the width direction and the distance H2 in the height direction and the size W0 in the width direction and the size H0 in the height direction of the projection region 141, respectively. That is, the ratio Ws = the distance W2 in the width direction / the size W0 in the width direction, and the ratio Hs = the distance H2 / the height direction / the size H0 in the height direction. Since the original image 150 to be input to the control unit 210 is arranged in the projection area 141 surrounded by the four vertices, the control unit 210 performs the ratios Ws and Hs in the width direction and the height direction of the original image 150. Based on the number of pixels, the designated point Sp (S, T, U) representing the touch position is associated with the pixel Pin (x, y) of the original image 150 (step S16).

  The projector device 100 recognizes the pointing operation without causing an error with respect to the position intended by the user by making a one-to-one correspondence between the position where the projection image 152 is touched and the position (pixel) in the original image 150. It becomes possible to do.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments that have been changed, replaced, added, omitted, and the like. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1, and it can also be set as a new embodiment.

  The present disclosure can be applied to a projector device that allows a user to perform an instruction operation on an image that has undergone geometric correction.

DESCRIPTION OF SYMBOLS 100 Projector apparatus 101 Opening part 110 Drive part 120 Power supply part 130 Wiring duct 140 Projection surface 140a Wall 140b Table 141 Projection area 142 Projector surface 150 Original image 151 Output image 152 Projection image 153 Infrared image 170 Projection part 200 User interface apparatus 210 Control Unit 220 memory 230 distance detection unit 231 infrared light source unit 232 infrared light reception unit 300 light source unit 310 semiconductor laser 320, 370, 410 light guide optical system 330 dichroic mirror 340 λ / 4 plate 350 lens 360 phosphor wheel 400 image generation unit 420 DMD
500 Projection optical system 510 Optical member

Claims (4)

A projection unit for projecting the output image;
Each pixel of the original image is projected based on the distance information, which detects distance information from the projection plane on which the output image is projected to the projection unit, and spatially detects an instruction operation by the user. A spatial position calculated, and a controller that geometrically corrects the original image to the output image,
The control unit associates the position indicated by the instruction operation with the position of the pixel in the original image based on the calculation result.
Projector device. The control unit calculates three-dimensional coordinates representing the pointed and operated position based on the distance information obtained from the detection unit.
The projector device according to claim 1. The control unit calculates three-dimensional coordinates of four vertices that define a projection region on the projection plane on which the output image is projected;
The projector device according to claim 2. The control unit calculates the distance in the width and height directions from any one of the four vertices of the projection area to the position where the instruction operation is performed,
From the ratio of the calculated distance in the width and height direction and the size of the projection area in the width and height direction, the designated position is associated with the position of the pixel in the original image.
The projector device according to claim 3.

Images