WO2016157805A1 - プロジェクター、及び、プロジェクターの制御方法 - Google Patents

プロジェクター、及び、プロジェクターの制御方法 Download PDF

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Publication number
WO2016157805A1
WO2016157805A1 PCT/JP2016/001604 JP2016001604W WO2016157805A1 WO 2016157805 A1 WO2016157805 A1 WO 2016157805A1 JP 2016001604 W JP2016001604 W JP 2016001604W WO 2016157805 A1 WO2016157805 A1 WO 2016157805A1
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WO
WIPO (PCT)
Prior art keywords
unit
main body
imaging
projection
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/001604
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English (en)
French (fr)
Japanese (ja)
Inventor
春日　博文
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to CN201680012996.5A priority Critical patent/CN107430321B/zh
Priority to US15/560,309 priority patent/US10469815B2/en
Publication of WO2016157805A1 publication Critical patent/WO2016157805A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
    • G03B17/54—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with projector
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/145—Housing details, e.g. position adjustments thereof
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30204—Marker
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30244—Camera pose

Definitions

  • the present invention relates to a projector that projects an image and a projector control method.
  • Patent Literature 1 detects the rotation amounts of the horizontal rotation and the vertical rotation of the optical axis by angle sensors.
  • an angle sensor is used for each axis for moving the projector.
  • the more the degree of freedom of change the more sensors are required, resulting in a complicated device configuration.
  • a projector in any of a projection unit that projects an image, a main body that houses the projection unit, a mounting unit that supports the main unit, and the mounting unit or the main body. And a detection unit that detects a relative position or a relative direction between the main body and the attachment unit based on a captured image of the imaging unit.
  • a detection unit that detects a relative position or a relative direction between the main body and the attachment unit based on a captured image of the imaging unit.
  • the imaging unit is provided in the attachment unit and images the main body. According to the present invention, the relative position or relative direction of the main body with respect to the attachment portion can be detected using the captured image.
  • the imaging unit is provided in the main body and images the attachment unit.
  • the relative position or relative direction of the main body with respect to the attachment portion can be detected using the captured image.
  • the detection unit may be configured such that the main unit and the attachment unit are relative to each other based on a change from the reference state of the main unit or the attachment unit included in the captured image of the imaging unit. Detecting a target position or relative direction. According to the present invention, the relative position or the relative direction between the main body and the attachment portion can be quickly obtained using the captured image.
  • the main body or the attachment portion may have a predetermined mark in an imaging range of the imaging unit, and the detection unit may be included in a captured image of the imaging unit.
  • a relative position or a relative direction between the main body and the attachment portion is detected based on a change of the mark from a reference state. According to the present invention, the relative position or the relative direction between the main body and the attachment portion can be quickly obtained with reference to the mark.
  • the main body may be connected to the attachment portion by a connecting portion capable of rotating at least one axis, and the detection portion may be centered on a rotating shaft of the connecting portion. A relative angle between the main body and the mounting portion is detected.
  • a reference scale is disposed in an imaging range of the imaging unit, and the detection unit detects an image of the reference scale and an image of the main body that are captured in a captured image of the imaging unit.
  • the detection unit detects an image of the reference scale and an image of the main body that are captured in a captured image of the imaging unit.
  • a relative position or a relative direction between the main body and the attachment portion is detected.
  • the reference scale by using the reference scale, it is possible to detect the relative position or the relative direction between the main body and the attachment portion by processing with higher accuracy and light load.
  • the imaging unit includes an imaging lens, a cover is attached to the imaging lens, and the reference scale is formed on the cover.
  • the reference scale can be used by attaching a cover to the imaging lens.
  • the cover is attached to the imaging lens so as to be rotatable.
  • the orientation of the reference scale can be adjusted by rotating the cover.
  • the imaging unit is detachably disposed on the attachment unit or the main body. According to the present invention, the imaging unit can be used by being attached to the attachment unit, and can be removed when the imaging unit is not used.
  • the projector may further include a correction unit that corrects an image projected by the projection unit based on a relative position or a relative direction between the main body and the attachment unit detected by the detection unit. It is characterized by. According to the present invention, it is possible to appropriately correct a projection image in accordance with the orientation of the main body, and to reduce the work burden on the user.
  • the projector control method includes, in the projector described above, a projector including a main body that houses a projection unit that projects an image, and an attachment unit that supports the main body.
  • a relative position or relative direction between the main body and the mounting portion is detected based on a captured image of an imaging portion provided on the mounting portion or the main body, and a projection image is based on the detected relative position or relative direction. It is characterized by correcting.
  • FIG. 1 is an external view of a projector according to an embodiment.
  • FIG. 2 is a configuration diagram of a projector, (A) is a side view of the projector, (B) is a front view of the projector, (C) is a side view of the imaging unit, and (D) is a plan view of the imaging unit.
  • the functional block diagram which shows the structure of the control system of a projector.
  • the flowchart which shows operation
  • FIG. 1 and 2 are external views of a projector 100 according to an embodiment to which the present invention is applied.
  • FIG. 1 is a configuration diagram of the projector 100
  • FIG. 2A is a side view
  • FIG. 2B is a front view
  • 2C is a side view of the imaging unit 140
  • FIG. 2D is a plan view of the imaging unit 140.
  • FIG. 1 also shows a lighting duct 200 to which the projector 100 is attached.
  • the projector 100 is a projector that incorporates a light source, modulates light emitted from the light source into image light, and projects an image on a wall surface or a screen.
  • the projector 100 includes a power storage unit 110 (attachment unit), a projection unit main body 120 (main unit) configured separately from the power supply storage unit 110, and a support shaft that connects the power storage unit 110 and the projection unit main body 120.
  • the power supply accommodating part 110 has an elongated, substantially box-shaped housing, and houses a power supply circuit (not shown) and the like in this housing.
  • the projection unit main body 120 has a substantially cylindrical casing, and houses the light projection unit 20 (FIG. 4) and the like.
  • the projector 100 is connected to a lighting duct 200 fixed to the ceiling or wall surface.
  • the lighting duct 200 is a bowl-shaped power supply body, and corresponds to, for example, a luminaire duct, a power supply duct, or a power supply common duct according to JIS C8366 standard.
  • a lighting fixture, an adapter for supplying power, and the like can be attached to the lighting duct 200.
  • FIG. 1 shows a cross section of the lighting duct 200, but the end face in the longitudinal direction of the lighting duct 200 may be closed or open.
  • the lighting duct 200 is installed on a ceiling surface, a wall surface, or the like, connected to a commercial power source (not shown), and supplies power to the above-described lighting fixtures and adapters.
  • the lighting duct 200 has an opening 201 extending along the longitudinal shape in a hollow body having a long shape, and supports a connector or the like inserted from the opening 201.
  • the opening 201 opens downward and can be hung by attaching a lighting fixture or the like from below.
  • the lighting duct 200 may be fixed to the wall surface.
  • the opening 201 opens in the horizontal direction, and a lighting fixture or the like can be attached and fixed from the side.
  • the lighting duct 200 has a pair of conductors 205 extending along the longitudinal direction of the lighting duct 200.
  • the conductor 205 is made of copper or other metal formed into a rod shape or a tape shape, and is electrically connected to a commercial power source.
  • the conductor 205 is connected to, for example, a commercial 100V two-pole AC power supply, and one conductor 205 serves as a ground electrode, and the other conductor 205 serves as a non-ground electrode.
  • the lighting duct 200 has a groove 206 that locks a member wider than the opening 201.
  • the groove 206 is disposed on both sides of the opening 201 inside the lighting duct 200, and an object fitted into the groove 206 is supported by the lighting duct 200.
  • the power supply housing part 110 has a connector 115 that can be connected to the lighting duct 200 on the upper surface of the housing.
  • the connector 115 is a substantially cylindrical protrusion that protrudes upward from the upper surface of the housing, and a pair of locking pieces 116 and a pair of contact conductors 117 are erected on the side surface of the connector 115.
  • the locking pieces 116 are formed in a flat plate shape and protrude from the connectors 115 in opposite directions.
  • the contact conductors 117 are configured by forming copper or other metal into a flat plate shape, and each contact conductor 117 protrudes from the connector 115 in the opposite direction.
  • the connector 115 When the projector 100 is attached to the lighting duct 200, the connector 115 is inserted into the opening 201.
  • the connector 115 is inserted into the opening 201 such that the locking piece 116 and the contact conductor 117 are oriented along the longitudinal direction of the lighting duct 200.
  • the connector 115 is connected to the lighting duct 200 when the power supply accommodating portion 110 is rotated 90 degrees.
  • the contact conductor 117 comes into contact with the conductor 205 of the lighting duct 200 and becomes conductive, and power can be supplied from the conductor 205 to the contact conductor 117.
  • the connector 115 is fixed to the lighting duct 200 via the locking piece 116. In this state, the connector 115 does not move in the longitudinal direction of the lighting duct 200. Further, when the power supply accommodating section 110 is connected to the lighting duct 200, the power supply circuit of the power supply accommodating section 110 is connected to the commercial AC power supply via the contact conductor 117, and the projector 100 can be operated.
  • the projector 100 can be easily attached to the lighting duct 200, and in the attached state, the projector 100 is supported while being suspended from the lighting duct 200. Further, in the mounted state, in the projector 100, the longitudinal direction of the power supply accommodating portion 110 is oriented along the longitudinal direction of the lighting duct 200.
  • a connector (not shown) for stabilizing the installation state of the projector 100 may be provided in the power supply accommodating portion 110 in addition to the connector 115.
  • This connector has, for example, a locking piece (similar to the locking piece 116) that interlocks with the rotation of a screw (not shown).
  • the connector is fitted into the lighting duct 200 and a screw (not shown) is attached. By rotating, the lighting duct 200 is engaged.
  • the power supply accommodating part 110 can be more reliably supported in the direction along the longitudinal direction of the lighting duct 200.
  • a support shaft 131 is provided in the power supply housing part 110.
  • the support shaft 131 is a bar-like member that is erected downward on the bottom surface of the power supply accommodating unit 110 in the installed state of the projector 100.
  • the support shaft 131 is fixed to the power supply accommodating part 110 and is connected to the upper surface of the projection part main body 120 via a ball joint 132 (connection part), and supports the projection part main body 120 together with the power supply accommodation part 110.
  • the projection unit main body 120 can freely change the direction with respect to the power supply accommodation unit 110 with the ball joint 132 as a fulcrum.
  • the projection unit body 120 is configured in a substantially cylindrical shape, and a projection port 128 through which the light projection unit 20 (FIG. 4) projects light is provided on the front surface 125 that is the front end surface of the projection unit body 120.
  • the projection port 128 is an opening through which the light projection unit 20 (FIG. 4), which will be described later, emits light, and may be covered with a translucent lens or cover, or a lens may be disposed inside the projection port 128. It may be a simple opening.
  • the optical axis of the light projected from the projection port 128 is indicated by a symbol L.
  • the optical axis L is parallel to the longitudinal direction (front-rear direction) of the projection unit main body 120.
  • the Y axis is an axis parallel to the installation surface (for example, the ceiling surface) on which the lighting duct 200 is installed and along the longitudinal direction of the lighting duct 200.
  • the Y axis can also be referred to as an axis along the longitudinal direction of the power supply accommodating portion 110.
  • the X axis is an axis parallel to the installation surface and perpendicular to the Y axis
  • the Z axis is perpendicular to the X axis and the Y axis.
  • shaft of X, Y, Z specifies a direction and is not limited to the position shown in FIG. 1 and each figure mentioned later.
  • Rotating the projection unit main body 120 around the X axis with the ball joint 132 as a fulcrum causes the optical axis L to rotate about the X axis. Further, by rotating the projection unit main body 120 around the Y axis at the ball joint 132, the optical axis L rotates about the Y axis. Similarly, by rotating the projection unit main body 120 about the Z axis, the optical axis L rotates about the Z axis.
  • the optical axis L can be freely moved in any of the three directions of the X axis, the Y axis, and the Z axis in a state where the power supply accommodating portion 110 is fixed to the lighting duct 200.
  • the light can be projected from the projection port 128 in a desired direction.
  • Two imaging units 140 are arranged on the surface of the power supply accommodating unit 110 on the projection unit main body 120 side, that is, on the lower surface in the attached state.
  • the imaging unit 140 includes an imaging unit 141 configured by a digital camera and captures images under the control of the control system 10 (FIG. 4) described later.
  • the imaging unit 141 is arranged facing the projection unit main body 120 side.
  • FIG. 2A shows imaging ranges A1 and A2 of the two imaging units 141, respectively.
  • the imaging ranges A1 and A2 of the two imaging units 141 both capture the upper surface of the projection unit main body 120.
  • the projection unit main body 120 can be rotated around the Z axis by a ball joint, and for example, the front surface 125 can be directed to one side (+ X direction) and the other side ( ⁇ X direction) in the X axis direction.
  • the power storage unit 110 includes two imaging units 141 so that the tip of the projection unit main body 120 (the end on the front surface 125 side) can be imaged regardless of the orientation of the projection unit main body 120. By providing these two imaging units 140, the tip of the projection unit main body 120 is included in at least one of the imaging ranges A1 and A2. Note that in the case where the projection unit main body 120 is directed to only one of the X-axis directions, the number of the imaging unit 141 may be one. Alternatively, the imaging unit 141 may be configured with a wide-angle camera so that one imaging unit 141 can capture both sides.
  • the imaging unit 141 includes an imaging lens, an imaging device such as a CCD, and other components (not shown) such as a peripheral circuit unit that reads a signal from the imaging device and generates digital image data. These components are accommodated in the imaging unit 140. As shown in FIGS. 2C and 2D, the imaging unit 140 is configured by housing the imaging unit 141 and peripheral circuits in a synthetic resin or metal case 142. The imaging unit 140 is attached to the power storage unit 110, and each unit of the imaging unit 141 is electrically connected to the control system 10 (FIG. 4) stored in the power storage unit 110.
  • the imaging unit 140 may be configured to be detachable from the power supply accommodating unit 110.
  • each part of the imaging unit 141 accommodated in the imaging unit 140 is electrically connected to the control system 10 (FIG. 4) accommodated in the power supply accommodating unit 110.
  • a general-purpose connector can be used.
  • the imaging unit 140 is detachable, a configuration including only one imaging unit 140 may be used.
  • the mounting location for mounting the imaging unit 140 may be provided at the position of the two imaging units 140 shown in FIG. In this configuration, the imaging unit 140 may be mounted at an appropriate mounting position according to the orientation of the tip of the projection unit main body 120.
  • the imaging lens (not shown) of the imaging unit 141 has a reference line 141a (reference) so as to coincide with an axis P (FIG. 3A) that is referred to in detection processing described later.
  • a cover 141b with a scale may be attached.
  • the position of the reference line 141a is adjusted to be an ideal reference line. In the present embodiment, a description will be given assuming that the cover 141b is not attached.
  • the projection unit main body 120 (optical axis L) can be freely moved by the ball joint 132 as described above.
  • the projector 100 detects the movement (tilt) of the projection unit main body 120 as rotation about the X axis, the Y axis, and the Z axis using the captured image of the imaging unit 141.
  • FIG. 3 is an explanatory diagram of an operation in which the projector 100 detects the movement (tilt) of the optical axis L, and (A), (B), (C), and (E) show the captured image D of the imaging unit 141. , (D) and (E) show the position of the projection unit main body 120.
  • the tip of the projection unit main body 120 is reflected in at least one of the two imaging units 141.
  • the projection unit main body 120 is projected in the longitudinal direction, that is, the direction of the optical axis L is parallel to the X axis, and the projection unit main body 120 is horizontal.
  • the reference body 120 is in the reference state.
  • the angles of the projection unit main body 120 with respect to the X axis, the Y axis, and the Z axis in the reference state are all 0 degrees.
  • the longitudinal direction of the projection unit main body 120 in the reference state is defined as an axis P.
  • the imaging unit 141 Since the axis P is fixed with respect to the imaging surface of the imaging unit 141, the axis P is at a fixed position with respect to the captured image D. Moreover, it is preferable that the center of the imaging unit 141 and the center of the support shaft 131 (ball joint 132) coincide with each other in the Y-axis direction. In addition, as described above, the imaging unit 141 has an imaging region set so that the front surface 125 of the projection unit main body 120 falls within the imaging range.
  • FIG. 3B shows an example of a captured image D when the projection unit main body 120 is rotated around the Z axis.
  • the projection unit main body 120 is shown obliquely, and when the longitudinal direction of the projection unit main body 120 is the axis Q, the angle ⁇ between the axis P and the axis Q obtained from the captured image.
  • the size of the image of the projection unit main body 120 is substantially the same as that of the captured image D of FIG. This is because the projection unit main body 120 has a cylindrical shape.
  • FIG. 3C shows an example of a captured image D when the projection unit main body 120 is rotated about the X axis
  • FIG. 3D is a projector 100 when the projection unit main body 120 is rotated about the X axis.
  • the distance (shift amount) between the axis Q of the projection unit main body 120 and the axis P in the reference state is x2
  • the distance from the ball joint 132 to the center of the entire surface 125 in a plane parallel to the front surface 125 is r2.
  • the following equation (3) is established for the rotation angle ⁇ of the projection unit main body 120.
  • sin ⁇ x2 / r2 (3)
  • the distance x2 can be obtained from the captured image D. For example, if the center of the image of the projection unit main body 120 in the captured image D is obtained as the axis Q, and the position of the axis P in the captured image D in the reference state is set or stored in advance, the distance x2 is obtained. Further, the distance r2 is also known, and the value of the distance r2 may be stored in advance. Therefore, the angle ⁇ can be obtained by the arithmetic processing of the following formula (4).
  • ⁇ sin ⁇ 1 (x2 / r2) (4)
  • FIG. 3E shows an example of a captured image D when the projection unit main body 120 is rotated about the X axis
  • FIG. 3F is a projector 100 when the projection unit main body 120 is rotated about the Y axis.
  • the shift amount of the tip of the projection unit main body 120 in this case is x3
  • the following formula (5) is established for the distance r1 and the rotation angle ⁇ of the projection unit main body 120 described above.
  • cos ⁇ (r1-x3) / r1 (5) Therefore, the angle ⁇ can be obtained by the following equation (6).
  • ⁇ cos ⁇ 1 ⁇ (r1 ⁇ x3) / r1 ⁇ (6)
  • the projection unit main body 120 rotates around the Y axis, and the captured image D is in the state shown in FIG. 3E, when the tip of the projection unit main body 120 rotates upward and downward. Sometimes it turns.
  • the projection unit is based on the shape of this distortion. The direction of rotation of the main body 120 may be determined.
  • the projector 100 can obtain the angles ⁇ , ⁇ , and ⁇ indicating the direction of the optical axis L of the projection unit main body 120. Also, when the movement of the projection unit main body 120 includes movements centered on a plurality of axes among the X, Y, and Z axes, the direction of the optical axis L can be obtained as described above.
  • a previously stored LUT look-up table
  • FIG. 4 is a functional block diagram illustrating the configuration of the control system 10 of the projector 100.
  • the control system 10 of the projector 100 includes an interface (I / F) unit 12 that connects an image supply device 30 that outputs image data.
  • Examples of the image supply device 30 include an image reproducing device such as a DVD player, a broadcast receiving device such as a digital TV tuner, and an image output device such as a video game machine and a personal computer.
  • the image supply device 30 may be a communication device that communicates with a personal computer or the like and receives image data.
  • the image supply device 30 is not limited to a device that outputs digital image data, and may be a device that outputs an analog image signal. In this case, an analog / digital conversion device that generates digital image data from an analog image signal may be provided on the output side of the image supply device 30 or the I / F unit 12.
  • the specific specifications and number of connectors and interface circuits included in the I / F unit 12 are arbitrary.
  • the image supply device 30 outputs digital image data in a data format that can be supported by the I / F unit 12.
  • the data input by the image supply device 30 may be a still image or a moving image (video) as long as the data format is compatible with the I / F unit 12.
  • data input from the image supply device 30 to the control system 10 is referred to as image data.
  • the control system 10 includes a control unit 11 that controls each unit of the projector 100 and an optical projection unit 20 that displays (projects) an image based on image data input to the I / F unit 12 on the screen SC.
  • the I / F unit 12 is connected to an image processing unit 13 that processes image data and outputs a display image signal to the light projection unit 20.
  • the image processing unit 13 performs processing such as color correction on the image data input to the I / F unit 12 according to the control of the control unit 11.
  • the image data processed by the image processing unit 13 is converted into an image signal for each frame and input to the display driving unit 14.
  • the image processing unit 13 can also display the image data stored in the storage unit 17. In this case, the image data stored in the storage unit 17 is input from the control unit 11 to the image processing unit 13, and the image processing unit 13 performs processing on the image data and outputs an image signal to the display driving unit 14. .
  • the control unit 11 includes, for example, a CPU, a ROM, and a RAM (not shown), and controls each unit of the control system 10 when the CPU executes a program stored in the ROM.
  • the control unit 11 executes the above-described program, thereby controlling the operation of the projector 100 projecting an image, correcting the projected image, and the like.
  • the control unit 11 controls execution timing, execution conditions, and the like of processing executed by the image processing unit 13.
  • the control unit 11 also controls the light source control unit 15 of the light projection unit 20 to adjust the luminance of the light source 21 and the like.
  • the control unit 11 includes an imaging control unit 11a, a projection direction detection unit 11b, and a projection control unit 11c as functional units that control the projector 100.
  • the control unit 11 is connected to an input unit 18 that receives user input operations.
  • the input unit 18 is connected to an operation panel 19 having a switch, and detects an operation on the operation panel 19.
  • the input unit 18 is configured as an infrared light receiving unit that receives an infrared signal transmitted from the remote controller 40, and detects an operation on the remote controller 40.
  • the input unit 18 outputs operation data indicating operations on the operation panel 19 and the remote controller 40 to the control unit 11.
  • a storage unit 17 is connected to the control unit 11.
  • the storage unit 17 is a storage device that stores programs and data executed by the CPU of the control unit 11 in a nonvolatile manner.
  • the storage unit 17 stores a control program for the control unit 11 to control the control system 10, various setting data processed by the control program, and the like.
  • the storage unit 17 of the present embodiment stores direction correction data 17a.
  • the direction correction data 17a is data including parameters, setting values, and the like used for processing by the projection control unit 11c.
  • the imaging unit 141 is connected to the control unit 11. Although one imaging unit 141 is shown in FIG. 4, two imaging units 141 may be connected to the control unit 11, respectively. Alternatively, a camera interface circuit (not shown) that selects one of the two imaging units 141 to acquire a captured image and outputs it to the control unit 11 is provided, and the two imaging units 141 are connected to the camera interface circuit. Also good. Further, when the imaging unit 140 is configured to be detachable, the connection between the control unit 11 and the imaging unit 141 may be released by removing the imaging unit 140.
  • the communication unit 16 is connected to the control unit 11.
  • the communication unit 16 performs wireless data communication conforming to a standard such as a wireless LAN (Wi-Fi (registered trademark)), Bluetooth (registered trademark), or the like with a device outside the projector 100.
  • the communication unit 16 may perform communication via a wired cable.
  • the imaging control unit 11a controls the imaging unit 141 to execute imaging, and acquires captured image data.
  • the imaging control unit 11a may cause only one of the two imaging units 141 included in the projector 100 to perform imaging, or cause the two imaging units 141 to perform imaging and acquire captured image data from each imaging unit 141. Also good.
  • the projection direction detection unit 11b detects the direction of the optical axis L (FIG. 1) by analyzing the captured image data of the imaging unit 141. As described with reference to FIGS. 3A to 3F, the process executed by the projection direction detection unit 11b calculates the rotation angle of the optical axis L based on the captured image of the imaging unit 141. It is processing.
  • the projection control unit 11 c controls the image processing unit 13, the display driving unit 14, and the light source control unit 15 to display a projection image P based on image data input from the image supply device 30 to the I / F unit 12 on the screen. Project onto the SC. Further, the projection control unit 11c causes the image processing unit 13 to execute correction processing corresponding to the direction of the optical axis L detected by the projection direction detection unit 11b.
  • the projection unit main body 120 faces the screen SC that is the projection surface in the above-described reference state
  • the optical axis L rotates around the Y axis
  • the optical axis L is inclined upward or downward with respect to the screen SC.
  • trapezoidal distortion in the vertical direction occurs in the projected image P on the screen SC.
  • the optical axis L rotates around the Z axis
  • the optical axis L is inclined in the horizontal direction with respect to the screen SC, so that a lateral (horizontal) trapezoidal distortion occurs in the projected image P on the screen SC.
  • the projection control unit 11c causes the image processing unit 13 to execute a trapezoidal distortion correction process corresponding to the rotation angle of the optical axis L around the Y axis and the Z axis.
  • the storage unit 17 stores direction correction data 17a including processing conditions, parameters, and the like for the image processing unit 13 to perform trapezoidal distortion correction.
  • the direction correction data 17a is, for example, a trapezoidal distortion correction parameter corresponding to the rotation angle of the optical axis L around the Y axis and the Z axis.
  • the projection control unit 11c reads out the parameters corresponding to the rotation angle detected by the projection direction detection unit 11b from the direction correction data 17a and outputs the parameters to the image processing unit 13, thereby quickly distorting the projection image P. Can be corrected.
  • the control unit 11 does not perform correction.
  • the projection control unit 11c corrects the rotation of the projection image P. This causes the image processing unit 13 to execute processing such as rotating the image so that the projection image P is the same as when the projection image P is projected on the screen SC facing the projection unit main body 120 in the reference state.
  • the light projection unit 20 forms a projection image P by projecting the light source 21, the modulation unit 22 that modulates the light emitted from the light source 21 to generate image light, and the image light modulated by the modulation unit 22 onto the screen SC.
  • the light source 21 is configured by a lamp such as a halogen lamp, a xenon lamp, or an extra-high pressure mercury lamp, or a solid light source such as an LED or a laser light source.
  • the light source 21 is turned on by the electric power supplied from the light source control unit 15 and emits light toward the modulation unit 22.
  • the light source control unit 15 can adjust the light emission luminance of the light source 21 according to the control of the control unit 11.
  • the modulator 22 modulates the light emitted from the light source 21 to generate image light, and irradiates the projection optical system 23 with the image light.
  • the display driving unit 14 drives each pixel of the light modulation element based on the image signal output from the image processing unit 13 and draws an image on the light modulation element in units of frames (screens).
  • the projection optical system 23 includes a lens that images the light modulated by the modulation unit 22 on the screen SC.
  • the projection optical system 23 may include various lenses or lens groups such as a zoom lens and a focus lens.
  • FIG. 5 is a flowchart showing the operation of the projector 100.
  • the operation of FIG. 5 is an operation of detecting the direction of the optical axis L based on the image captured by the imaging unit 141 and correcting the projection image P.
  • the operation of FIG. 5 is executed when an instruction is input by the operation of the operation panel 19 or the remote controller 40 while the projector 100 is projecting the projection image P.
  • the control unit 11 functions as a detection unit.
  • the control unit 11 controls each of the two imaging units 141 to execute imaging (step ST11).
  • the control unit 11 acquires captured image data from each imaging unit 141 (step ST12).
  • the control unit 11 may select either of the captured image data of the two imaging units 141 as a processing target, or may be the captured image data in the order in which the captured image data is input from the imaging unit 141. .
  • you may process the two imaging parts 141 simultaneously. For example, two image capturing units 141 may be combined or combined to generate one processing target image data.
  • the control unit 11 detects the image of the projection unit main body 120 from the captured image data to be processed (step ST13), and specifies the direction and shape of the detected image of the projection unit main body 120 (step ST14).
  • the control unit 11 compares the direction and shape of the image of the projection unit main body 120 identified in step ST14 with the reference state, and performs the above-described arithmetic processing and the like, so that the X-axis, Y-axis, and Z-axis rotations are performed.
  • the rotation angle of the optical axis L that is, the projection direction is calculated (step ST15).
  • control part 11 performs correction
  • the projector 100 includes the light projection unit 20 that projects an image, the projection unit main body 120 that houses the light projection unit 20, and the power source that supports the projection unit main body 120.
  • a storage unit 110 the relative position or relative direction between the projection unit main body 120 and the power supply accommodation unit 110 is determined based on the imaging unit 141 provided in either the power supply accommodation unit 110 or the projection unit main body 120 and the captured image of the imaging unit 141.
  • a control unit 11 for detection is used for detection. Thereby, the relative position or relative direction of the power supply accommodating part 110 and the projection part main body 120 is detectable using the captured image of the imaging part 141.
  • the imaging unit 141 is disposed in the power supply housing unit 110 and the projection unit main body 120 is imaged. According to this configuration, the relative position or relative direction between the projection unit main body 120 and the power supply housing unit 110 can be detected with a simple configuration using the imaging unit 141. For this reason, for example, when the projection unit main body 120 moves relative to the power supply housing 110 and the relative position or relative direction changes, this change can be detected. Further, even a configuration with a high degree of freedom of movement can be handled without complicating the configuration.
  • the imaging unit 141 is disposed on the projection unit main body 120 side, and the power supply housing unit 110 is imaged, so that the control unit 11 obtains the relative position or relative direction between the power supply housing unit 110 and the projection unit main body 120. May be.
  • control unit 11 determines the relative position between the projection unit main body 120 and the power supply accommodation unit 110 based on the change from the reference state of the projection unit main body 120 or the power supply accommodation unit 110 included in the captured image of the imaging unit 141. Or detect the relative direction. For this reason, the relative position or relative direction between the projection unit main body 120 and the power supply housing unit 110 can be quickly obtained using the captured image.
  • the imaging unit 140 is provided with a cover having a reference line 141a (reference scale). That is, the reference line 141 a is arranged in the imaging range of the imaging unit 141.
  • the control unit 11 detects the image of the reference line 141a that appears in the captured image of the imaging unit 141 and the image of the projection unit main body 120, and detects the relative position or relative direction between the projection unit main body 120 and the power supply housing unit 110. To do. Therefore, by using the reference line 141a, it is possible to detect the relative position or the relative direction between the projection unit main body 120 and the power supply housing unit 110 by processing with higher accuracy and light load.
  • the cover may be rotatably attached to the imaging lens.
  • the imaging unit 141 may be detachably disposed on the power supply housing unit 110. In this case, the imaging unit 141 can be used by being mounted on the power supply housing unit 110, and can be removed when the imaging unit 141 is not used.
  • This rotation angle is an example of a relative positional relationship or a relative direction between the power storage unit 110 and the projection unit main body 120. That is, the control unit 11 may calculate the relative position between the power supply housing unit 110 and the projection unit main body 120 from the rotation angles of the optical axis L around the X axis, the Y axis, and the Z axis. You may ask for. Further, the control unit 11 may obtain the relative position and / or relative angle between the power storage unit 110 and the projection unit main body 120 directly from the captured image of the imaging unit 141.
  • the projection unit main body 120 is connected to the power supply housing unit 110 by a ball joint 132 capable of rotating at least one axis, and the control unit 11 is configured to connect the projection unit main body 120 around the ball joint 132 and the power supply housing unit 110. Detect relative angle.
  • the modulator 22 may have a configuration using a transmissive liquid crystal light valve, a configuration using a reflective liquid crystal panel, or a configuration including a digital mirror device (DMD).
  • a transmissive liquid crystal light valve a configuration using a reflective liquid crystal panel
  • a configuration including a digital mirror device DMD
  • the liquid crystal panel or DMD is combined with a color wheel. Also good.
  • the projector 100 is not limited to the configuration that is disposed on the front side of the screen SC and projects the projection image P on the front side of the screen SC, and may be a rear projection type projector that is disposed on the back side of the screen SC.
  • the screen SC may be a wall surface.
  • the top surface of the projection unit main body 120 can be easily detected from the captured image of the imaging unit 141 so that the position and orientation of the projection unit main body 120 can be easily detected.
  • a predetermined marker may be attached (within the imaging range of the imaging unit 141).
  • the marker is provided by painting or pasting, has a pattern (pattern) that can be optically detected by color or brightness, and may have a geometric pattern such as a striped pattern or a checkered pattern.
  • the relative position or relative direction between the projection unit main body 120 and the power supply housing unit 110 can be quickly obtained using the marker as a reference.
  • the rotation of the projection unit main body 120 is detected based on the captured image D of the imaging unit 141.
  • the present invention is not limited to this, and an inertial sensor such as a gravity sensor (acceleration sensor) is provided in the projection unit main body 120, and the rotation of the projection unit main body 120 is detected using the detection result of the inertial sensor and the captured image D. An angle or direction may be obtained.
  • the present invention is not limited to this.
  • the structure which provides the imaging part 141 in the projection part main body 120 may be sufficient.
  • the control unit 11 may obtain the relative position or direction based on the image of the power supply housing unit 110 that appears in the captured image of the imaging unit 141.
  • a scale indicating the longitudinal direction and the width direction of the projection unit main body 120 may be attached to the cover 141 b of the imaging unit 141, and the marker M may be formed on the lower surface of the power supply housing unit 110.
  • the control unit 11 analyzes the captured image of the imaging unit 141 to obtain the relative position or direction.
  • the control unit 11 transmits the captured image data of the imaging unit 141 to the communication unit 16. May be sent to an external computer.
  • a computer outside the projector 100 may obtain the relative position or direction between the power storage unit 110 and the projection unit main body 120, or may generate a correction parameter corresponding to the obtained position and direction.
  • Each functional block shown in FIG. 4 shows a functional configuration realized by cooperation of hardware and software, and a specific mounting form is not particularly limited.
  • each functional block does not necessarily have to be mounted, and it is of course possible to realize a configuration in which a function of a plurality of functional units is realized by one processor executing a program.
  • a part of the function realized by software may be realized by hardware, or a part of the function realized by hardware may be realized by software.
  • the specific detailed configuration of each other part of the projector 100 can be arbitrarily changed without departing from the gist of the present invention.
  • DESCRIPTION OF SYMBOLS 10 Control system, 11 ... Control part (detection part), 11a ... Imaging control part, 11b ... Projection direction detection part, 11c ... Projection control part, 13 ... Image processing part, 17 ... Memory

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  • Engineering & Computer Science (AREA)
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  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Length Measuring Devices By Optical Means (AREA)
PCT/JP2016/001604 2015-03-30 2016-03-18 プロジェクター、及び、プロジェクターの制御方法 Ceased WO2016157805A1 (ja)

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US10469815B2 (en) 2019-11-05
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