JP5162393B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device that projects illumination light so as to cover an irradiated object.

  Conventionally, as an illuminating device that emits illumination light of an arbitrary shape, a filter called a gobo or a mask is installed in a projection device, and a projection unit that emits illumination light from the projection device is shielded. Thereby, the illumination light which passed the filter will be in the state cut out in the specific shape. Specifically, in a conventional illumination system, a filter (gobo etc.) cut out in a base shape composed of circles, triangles, squares, etc. is attached to a projection device to shape the contour of illumination light.

  In addition, in a conventional illumination system, if you want to irradiate only the object to be irradiated, adjust the projection position of the illumination light emitted from the projection device to the position of the object to be irradiated, and then roughly use the aperture function and zoom function of the projection device The operation of matching the contour of the illumination light with the shape of the irradiated object is performed.

  Further, conventionally, there is an illumination system that performs a space effect by using a projector, which is a projection device, instead of a lighting fixture (light). The lighting fixture used for this lighting system is also called a moving projector. This moving projector emits image light as illumination light. For this reason, the shape and color of irradiation light can be freely set and changed as a moving image.

  However, even with this lighting system, when shaping the illumination light, a method is used that roughly matches the contour of the illumination light to the shape of the object to be irradiated, using the base shape, as with conventional illumination systems. Has been.

Further, conventionally, a technique described in Patent Document 1 below is known as a stereoscopic display device that can effectively express the surface texture of an object in a stereoscopic model.
http://www.egghouse.com/gobo/about.htm http://www.ushiolighting.co.jp/product/productimage/pdf/dl2.pdf JP 2006-338181 A

  However, in the conventional illumination system described above, since the shape filter, aperture, and zoom prepared in advance are used, it is only possible to roughly match the shape of the illumination light to the irradiated object.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object of the present invention is to provide an illumination device that can identify and correct light leaking from an irradiated object with a simple process.

  The present invention provides a projection unit that projects projection light including first irradiation light that is irradiated so as to cover an irradiation object and second irradiation light that is irradiated to other than the irradiation object, and a projection range of the projection unit The first leakage light projected from the object other than the irradiated object is detected with reference to the imaging means having the imaging range and the image captured by the imaging means, and the second Leakage light detecting means for detecting the second leaked light projected on the irradiated object by the irradiated light, and the leaked light for specifying the positions of the first leaked light and the second leaked light detected by the leaked light detecting means. Specifying means.

In order to solve the above-described problem, such a lighting device corrects the leakage light correction unit so as to eliminate the first leakage light and the second leakage light specified by the leakage light identification unit, or leaks light. Correction is performed so as to blur the first leakage light and the second leakage light specified by the specifying means.

According to the illuminating device to which the present invention is applied, the leakage light correction means corrects the irradiated light so that the first leakage light and the second leakage light specified as the leakage light are erased or blurred. The process can identify and correct the light leaking from the irradiated object.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present invention is applied to an illumination system configured as shown in FIGS. 1 and 2, for example. This illumination system includes a light control unit 1, projectors 2A and 2B (hereinafter simply referred to as “projector 2” when collectively referred to) operated by the control of the light control unit 1, and the projectors 2A and 2B. Camera devices 3A and 3B (hereinafter simply referred to as “camera device 3” when collectively referred to) (imaging means) and a personal computer 4 are provided. This illumination system projects illumination light from the projector 2 only to specific irradiated objects 10A and 10B (hereinafter simply referred to as “irradiated object 10” when collectively referred to) only by a simple operation of the user. Is.

  In this illumination system, the projector 2A and the camera device 3A are provided close to each other, and the projector 2B and the camera device 3B are provided close to each other. By adjusting the positional relationship between the projector 2A and the camera device 3A, the projection range 20 of the projector 2A and the imaging range 30 of the camera device 3A coincide with each other. Similarly, by adjusting the positional relationship between the projector 2B and the camera device 3B, the projection range 20 of the projector 2B matches the imaging range 30 of the camera device 3B.

  In the illumination system, the light control unit 1 processes image data output from the projectors 2A and 2B in accordance with a user operation on the personal computer 4. Accordingly, the illumination system projects projection light from the projectors 2A and 2B so as to cover the subjects 10A and 10B with illumination light in accordance with a user operation.

  In the following description, the entire light emitted from the projector 2 is referred to as “projection light”, and light projected from the projection light so as to cover (coat) the irradiated object 10 is referred to as “illumination light”. The light projected on the background other than the irradiated object 10 is called “background light”. The illumination light corresponds to the first irradiation light, and the background light corresponds to the second irradiation light.

  The projectors 2A and 2B are installed in a predetermined space such as a show window space. In this predetermined space, irradiated objects 10A and 10B such as mannequins are installed, and the projectors 2A and 2B project projection light that covers the irradiated objects 10A and 10B with illumination light. The projection range 20 of the projectors 2A and 2B is determined by the installation position and orientation of the projectors 2A and 2B, the angle of view, and the driving angle.

  Projection light data is supplied from the light control unit 1 to the projectors 2A and 2B. This projection light data is used to determine an illumination range and a non-illumination range that are irradiated with illumination light within a predetermined projection range of the projectors 2A and 2B. The illumination range includes the first irradiation light and the background light = second irradiation light. This projection light data is generated by the user's operation on the personal computer 4 described later and the operation of the light control unit 1.

  The camera devices 3A and 3B have a predetermined space including a predetermined projection range 20 in which a spatial effect is produced by illumination light emitted from the projectors 2A and 2B as an imaging range 30. The camera devices 3 </ b> A and 3 </ b> B include an imaging mechanism including an imaging element such as a CCD, an optical component, and the like, and an interface that outputs captured image data captured by the imaging mechanism to the light control unit 1 or the personal computer 4.

  The personal computer 4 includes a display monitor (display means) 41, a keyboard 42 and a mouse 43, which are operation I / Fs, and other CPUs and memories. The display monitor 41 is supplied with captured image data captured by the camera devices 3 </ b> A and 3 </ b> B via the illumination light generation unit 11 of the light control unit 1. Thereby, the display monitor 41 can present a show window space that the user intends to produce a space, for example. The operation I / Fs 42 and 43 include a mechanism for detecting a user operation. The personal computer 4 outputs a command from the personal computer 4 to the light control unit 1 based on a user operation, and causes the light control unit 1 to perform various processes.

  The light control unit 1 projects the illumination light toward the irradiation object 10 having an arbitrary shape such as a mannequin, so that the irradiation object 10 is irradiated with the monochromatic illumination light as shown in FIG. The object 10 is observed. The illumination system is not limited to monochromatic illumination light, and the object to be irradiated 10 may be coated with illumination light of multiple colors or video.

  Normally, when monochromatic projection light is emitted over the entire projection range of the projector 2, illumination light is irradiated in addition to the irradiated object 10, and a shadow is formed behind the irradiated object 10. On the other hand, the illumination system projects illumination light only on the surface of the illuminated object 10 and projects background light of the background color on the background of the illuminated object 10. Thereby, the irradiated object 10 is coated with the illumination light.

  The light control unit 1 includes an illumination light generation unit 11 to which projection light data is supplied from the personal computer 4, a first coating correction unit 12, a second coating correction unit 13, and a third coating correction unit 14. The leakage light correction unit 15 is provided. The light control unit 1 shown in FIG. 1 is configured by computer hardware including a CPU, ROM, RAM, storage device, etc., but in FIG. 1, for convenience, it is divided into functional blocks. Give an explanation.

  The illumination light generation unit (irradiation light generation unit) 11 functions as a projection light data input unit that inputs projection light data. The illumination light generation unit 11 may receive projection light data from a personal computer 4 or a DVD player (not shown), and may generate monochromatic projection light data when a color of monochromatic light is designated. . The projection light data is generated as a planar image.

  The illumination light generation unit 11 may set not only the characteristics of the illumination light but also the characteristics of the background light projected on other than the irradiated object 10. For example, the irradiation light generation unit 11 sets any one of luminance, luminous intensity, luminous flux, color temperature, and performance as the respective characteristics of illumination light and background light. This setting process is performed based on, for example, a signal from the personal computer 4 representing the characteristics of irradiation light and background light desired by the user.

  For example, when the entire illuminated object 10 is illuminated with a single color, the projection light data is a monochrome signal for the entire illumination light projection range. Further, the illumination light generation unit 11 is a video signal in which the entire illumination light projection range is a pattern image or video even when illumination light that is a pattern image or video of multiple colors is used as coating light. . The projection light data input or generated by the illumination light generation unit 11 is supplied to the first coating correction unit 12.

  When the illumination light defined by the projection light data is an image, the illumination light generation unit 11 desirably performs a distortion correction process so that the image can be seen without distortion when the image is projected onto the irradiated object 10. This distortion correction processing is based on the shape of the irradiated object 10, the positional relationship between the projector 2 and the irradiated object 10, the viewpoint position of the user, and the like. This is realized by a known coordinate transformation process that can be seen without distortion when viewed. This coordinate conversion process is realized by a projection light data correction process to be described later. Similarly, when an image is projected on a place other than the irradiated object 10, a distortion correction process is performed so that the image can be seen without distortion in a state where the image is projected on a place other than the irradiated object 10.

  The first coating correction unit 12, the second coating correction unit 13, and the third coating correction unit 14 coat the irradiated object 10 with the illumination light when the irradiated object 10 is irradiated with the illumination light. The projection light data is corrected. The corrected projection light data is corrected so that the contour of the illumination light matches the contour of the irradiated object 10.

  The first coating correction unit 12 corrects the projection light data so as to cut the contour of the illumination light included in the illumination light in accordance with the shape of the irradiated object 10. Thus, the first coating correction unit 12 performs the cutting process on the irradiation range of the illumination light so that the illumination light is projected only on the irradiated object 10 and the background light is projected on other than the irradiated object 10.

  Here, the first coating correction unit 12 is supplied with shape data of the irradiated object 10 having an arbitrary shape. The 1st coating correction | amendment part 12 performs the cutting process of the irradiation range of illumination light according to this shape data. The shape data may be obtained by analyzing the image captured by the camera device 3 and extracting the shape of the irradiated object 10, and is multi-directional shape data reproduced three-dimensionally by computer graphic technology. There may be.

  The first coating correction unit 12 performs mapping processing using the shape data, thereby creating projection light data in which the shape and size of the illumination light corresponding to the shape of the irradiated object 10 are adjusted. By this mapping process, the projection light data representing the planar image is mapped to the projection light data in which the illumination light is mapped only on the irradiation object 10 having an arbitrary shape, and the illumination light is not mapped on a portion other than the irradiation object 10. Become. The video signal subjected to this mapping process is a video signal for projecting illumination light onto the irradiated object 10 and projecting background light to a portion other than the video portion corresponding to the illumination light. The first coating correction unit 12 supplies projection light data including a video signal of illumination light projected onto the irradiated object 10 and a video signal of background light to the second coating correction unit 13.

  Here, when the center axis of the projection range of the projector 2 and the center position (origin position) of the irradiated object 10 coincide with each other, the projection light data corrected by the above-described mapping process is highly accurate. Thus, the irradiated object 10 can be coated with illumination light. However, as shown in FIG. 1, when the positional relationship between the origin position of the irradiated object 10 and the center axis of the projection range of the projector 2 is not directly opposed, the first coating correction unit 12 alone has high accuracy. Correction sufficient to illuminate the illuminated object 10 is not possible. That is, when the optical axis of the projector 2 is deviated from the origin position of the irradiated object 10, it is necessary to correct the projection light data using the position of the projector 2 as a parameter.

  For this purpose, the illumination system further performs correction processing on the projection light data by the second coating correction unit 13 in accordance with the relationship between the origin position of the irradiated object 10 and the position of the projector 2. In this correction processing, the video display parameters are changed by performing parallel movement conversion and rotational movement conversion on the video display parameters necessary for video creation. In this case, the image display parameter is changed by converting the image display parameter into an asymmetric value in the vertical and horizontal directions along the illumination light projection range. As a result, even if the illumination light is projected from the projector 2 onto the irradiated object 10 from any direction, the illumination system further projects the illumination light so as to project the illumination light only on the irradiated object 10 with high accuracy. Correct the contour.

  Specifically, the second coating correction unit 13 inputs the position of the irradiated object 10 and the position of the projector 2 in advance. In this input process, a value in accordance with a parameter input operation from the personal computer 4 is input. Then, the second coating correction unit 13 acquires a correction parameter that is a posture parameter of the irradiated object 10 with respect to the projector 2. And the 2nd coating correction | amendment part 13 performs parallel displacement conversion and rotational displacement conversion based on a correction parameter.

  In addition to the positional relationship between the projector 2 and the irradiated object 10, the illumination system also inputs the performance of the projector 2 such as the projection angle of view of the projector 2 and the optical axis shift amount and the position of the observer from the personal computer 4. Then, the projection light data may be corrected. Specifically, the illumination system inputs from the personal computer 4 a preset observer position, the shape of the irradiated object 10, and the relative position and orientation of the projector 2 and the irradiated object 10. Then, a correction table is created as a correction parameter that can be coated when the illumination light is projected onto the irradiated object 10. This correction table is a correspondence map between a flat projection surface and a mesh model of the projection surface of the irradiated object 10 having an arbitrary shape. This correspondence map is used to perform coordinate conversion according to the correction table, and to convert projection light data for flat display into projection light data for display in an arbitrary shape for each pixel of the projection light data.

  Further, such a correction table is prepared for each position of the observer, the shape of the irradiated object 10, and the relative position and orientation of the projector 2 and the irradiated object 10, and the second coating correction unit 13. It is also possible to make corrections by selecting them.

  When the illumination light is projected onto the irradiated object 10 as described above, the third coating correction unit 14 performs video distortion correction processing using the viewpoint position of the observer as a correction parameter. The observer's viewpoint position is set near a predetermined distance facing the irradiated object 10.

  When there is a viewpoint position of the irradiated object 10 recommended in advance, the third coating correction unit 14 has a correction table for correcting the image distortion when the irradiated object 10 is observed from the viewpoint position. Stored. Then, when the projection light data is supplied from the second coating correction unit 13, the third coating correction unit 14 performs coordinate conversion on each pixel of the projection light data according to the correction table to obtain an image without distortion. . Thereby, the illumination system can distort the shape of the illumination light in order to allow the illumination light to be observed without distortion when the illumination light projected onto the irradiated object 10 is viewed from the observer's viewpoint position.

  Further, when a value obtained by measuring the observer's viewpoint position is input, the third coating correction unit 14 may calculate a viewpoint position parameter from the measured value. Thereby, the 3rd coating correction | amendment part 14 can produce | generate the illumination light which coats the to-be-irradiated object 10 so that it can watch from a viewpoint position without distortion after the movement of a viewpoint position.

  Such correction processing by the light control unit 1 will be described supplementarily at the end of this embodiment.

  According to such an illumination system, the projection light data is corrected based on the shape of the object 10 to be irradiated, and the projection light data is corrected based on the positional relationship between the projector 2 and the object 10 to be irradiated. Illumination light can be projected only on the irradiated object 10.

  Here, in the above description, the first coating correction unit 12 corrects the projection light data based on the shape of the irradiated object 10, and the projection light data is calculated based on the set positions of the irradiated object 10 and the projector 2. The projection light data has been corrected based on the viewpoint position of the observer, but at least any correction may be performed. Further, the shape data, the position data, and the viewpoint position data for correction are not precise data, but are used to correct the projection light data using rough data that can be easily input to the personal computer 4. May be. That is, in this illumination system, when the projection light is actually projected onto the irradiated object 10, the leakage light correcting unit 15 irradiates the illumination light leaking from the irradiated object 10 and the irradiated object 10. The background light being detected is detected as leakage light, and the projection light is corrected.

  The leakage light correction unit 15 is connected to the camera device 3 and receives video data obtained from the same imaging range 30 as the projection range 20 from the camera device 3. Then, the leakage light correction unit 15 refers to the video data captured by the camera device 3 when projecting the projection light from the projector 2, and the illumination light (first irradiation light) is applied to other than the irradiated object 10. While detecting the projected leaked light (first leaked light), the background light (second irradiated light) detects the second leaked light projected on the irradiated object 10. In this leakage light detection process, for example, the luminance change of the irradiated object 10 portion and the luminance change of the background portion included in the video data are scanned. When there is a portion with high brightness on the background, it is determined that there is leaked light other than the irradiated object 10, and when there is a portion with low brightness on the irradiated object 10, the background light is irradiated with the object. 10, it is determined that there is leaked light projected on the screen 10.

  Then, the leakage light correction unit 15 specifies a position in the projection range 20 corresponding to the position of the video data where the leakage light is detected. Here, since the projector 2 and the camera device 3 are set so that the projection range 20 of the projector 2 and the imaging range 30 of the camera device 3 coincide with each other, the projection corresponding to the leakage light detection position in the imaging range 30 is performed. The position data in the optical data is corrected.

  The first coating correction unit 12, the second coating correction unit 13, and the third coating in which the shape data, the installation position, and the viewpoint position for coating the irradiated object 10 as described above are not set with high accuracy. When only one of the correction processes of the correction unit 14 is performed, when the projection light composed of the illumination light 20A and the background light 20B is projected onto the irradiated object 10, a leakage light projection portion as shown in FIG. 10 'and 40' occur.

  Here, when the illumination light 20A is shifted to the right side in the drawing among the projection light irradiated from the projector 2 after being corrected by the light control unit 1, the illumination light 20A corresponding to the shift is The leakage light 20A ′ is projected onto the background wall 40 from the right side of the irradiated object 10. The leaked light 20 </ b> A ′ is imaged by the camera device 3 as a leaked light projection portion 40 ′ projected on the background wall 40. Further, the background light 20B resulting from the deviation of the illumination light 20A is projected on the left side of the illuminated object 10 in the drawing as the leaked light 20B 'corresponding to the deviation. The leakage light 20B ′ is imaged by the camera device 3 as a leakage light projection portion 10 ′ projected on the irradiated object 10.

  The leakage light correction unit 15 receives captured image data including the leakage light projection portion 10 ′ and the leakage light projection portion 40 ′ from the camera device 3. Then, the leakage light correction unit 15 detects the presence or absence of the leakage light projection portion 10 ′ on the irradiated object 10 and the presence or absence of the leakage light projection portion 40 ′ on the background wall 40 by analyzing the captured image data. When either the leak light 20A ′ or the leak light 20B ′ is present, the leak light correction unit 15 informs that the leak light 20A ′ or the leak light 20B ′ is generated on the screen of the display monitor 41. Present in

  The configuration for detecting the leakage light by the leakage light correction unit 15 is not limited to the use of the camera device 3, and a light receiving element is provided on the irradiated object 10 or the background wall 40, and the light received by the light receiving element. May be detected. For example, a light receiving element is provided at the edge of the irradiated object 10 to detect that irradiation light is not projected onto the irradiated object 10 or that background light is projected onto the irradiated object 10.

  Further, the leakage light correction unit 15 identifies the positions of the leakage light projection portion 10 ′ of the irradiated object 10 and the leakage light projection portion 40 ′ of the background wall 40 by analyzing the captured image data (leakage). Light identification means). The leakage light correction unit 15 corrects the projection light portion corresponding to the leakage light projection portion 10 ′ and corrects the projection light portion corresponding to the leakage light projection portion 40 ′.

  As a method of correcting the leakage light, the leakage light correction unit 15 includes the leakage light 20A ′ projected on the leakage light projection portion 40 ′ whose position is specified and the leakage light 20B projected on the leakage light projection portion 10 ′. Modify the projection light data so that 'is erased. For example, the projection light data is modified so that the background light 20B is projected on the leakage light projection portion 40 'instead of the illumination light 20A. Further, the projection light data is corrected so that the background light 20B is not projected onto the leakage light projection portion 10 '. If the background light 20B is a dark color and it is not noticeable that the leakage light 20B ′ is projected onto the irradiated object 10, it is not necessary to turn off the leakage light 20B ′ of the leakage light projection portion 10 ′. You may perform only the correction which erases only the part into which the illumination light leaked.

  As a method for correcting the leakage light, the leakage light correction unit 15 includes the leakage light 20A ′ projected on the leakage light projection portion 40 ′ whose position is specified and the leakage projected on the leakage light projection portion 10 ′. The projection light data is corrected so as to blur the light 20B ′. Specifically, in the contour portion having a predetermined width of the illumination light 20A projected on the leakage light projection portion 40 ', the brightness and color are made closer to the background light 20B toward the end of the illumination light 20A. Similarly, in the contour portion having a predetermined width of the background light 20B projected on the leakage light projection portion 10 ', the brightness and color are made closer to the illumination light 20A toward the end of the background light 20B.

  As a method of correcting the leakage light, the leakage light correction unit 15 may not project the projection light on the leakage light projection portion 10 ′ and the leakage light projection portion 40 ′.

  As described above in detail, according to the illumination system to which the present invention is applied, leaked light leaking from the irradiated object 10 is detected when projection light for coating the irradiated object 10 with illumination light is projected. When the leakage light is detected, the lighting system can perform a correction process to turn off the leakage light or to make the leakage light portion inconspicuous.

  Therefore, according to this illumination system, even if leakage light occurs because the illumination light cannot be projected onto the irradiated object 10 with high accuracy, the leakage light can be corrected. Thereby, the illumination system does not need to set an accurate correction parameter so as to cover the irradiated object 10 with illumination light with high accuracy. Therefore, even if a user without specialized knowledge simply performs correction parameter setting work and leakage light is generated, it is possible to provide an illumination system that can project the illumination light only on the irradiated object 10 without making the leakage light noticeable. .

"Correction processing of projection light data"
Next, projection light data correction processing in this illumination system will be described. The following description is a process for generating “projection light including first irradiation light irradiated so as to cover the irradiated object 10 and second irradiation light irradiated other than the irradiated object 10”. There is no limitation on the leakage light correction unit 15 described above.

  For example, as shown in FIG. 4, let us consider a plate-like object 10 that is spaced apart from the user U by a distance L and is inclined with respect to the user U as the irradiation object 10 having an arbitrary shape. The flat object 10 is visually recognized from the viewpoint position P1 of the user U at a viewing angle θ1. The distance from the point P2 on the flat object 10 intersecting the user U's visual field center to the user U is a distance L1.

  In the positional relationship between the viewpoint position P1 and the point P2 on the flat object 10, as shown in FIG. 5A, a grid-like planar image 100 (coating light) shown in FIG. Consider the case of viewing on the flat object 10 through the viewing image plane 50U. In this case, when the same image is displayed on the flat object 10 as the flat image 100 shown in FIG. 5B is displayed on the image surface 50U, each coordinate on the image surface 50U and each image on the flat object 10 are displayed. It is necessary to obtain the correspondence with the coordinates. As schematically shown in FIG. 5A, the points b1, b2, b3, b4, and b5 on the image plane 50U correspond to the points a1, a2, a3, a4, and a5 on the flat object 10. ing. Therefore, the images displayed at the points a1, a2, a3, a4, and a5 on the flat object 10 are visually recognized by the user U as the points b1, b2, b3, b4, and b5 on the image surface 50U.

  Further, as shown in FIG. 6, a point P2 where the line of sight of the user U intersects with the flat object 10 and a projection position P3 of the projector 2 are a distance L2. Further, the projector 2 projects the projection light within a predetermined projection angle of view θ2.

  In this case, the positional relationship between the image plane 50P of the projector 2 and the flat object 10 is such that the points a1, a2, a3, a4, a5 on the flat object 10 are on the image plane 50P as shown in FIG. Corresponding to points c1, c2, c3, c4 and c5. That is, points on a straight line obtained by extending the points c1, c2, c3, c4, and c5 on the image plane 50P from the projection position P3 of the projector 2 become the points a1, a2, a3, a4, and a5 of the flat object 10. .

  From such a relationship between the viewpoint position P1 and viewing angle θ1 of the user U, the position of the flat object 10, the projection position P3 of the projector 2, and the projection angle of view θ2, the image plane 50P in the projector 2 shown in FIG. When an image is projected onto the upper points c1, c2, c3, c4, and c5, the image is projected onto the points a1, a2, a3, a4, and a5 on the flat object 10. As a result, the points a1, a2, a3, a4, and a5 on the flat object 10 are visually recognized as the points b1, b2, b3, b4, and b5 on the video screen 50U in FIG. Therefore, in order for the user U to visually recognize the flat image 100, the projector 2 uses the coordinates on the flat object 10 corresponding to the coordinates on the image surface 50U and the flat plate corresponding to the coordinates on the image surface 50P. Based on the correspondence with each coordinate on the object 10, it is necessary to project a distorted planar image 100 '' as shown in FIG. 7B.

  In order to realize such an illumination light projection operation, the light control unit 1, as shown in FIG. 4, the viewpoint position indicating the viewpoint position P <b> 1 of the user U, the viewpoint position / posture parameter indicating the line-of-sight direction, and the user U A viewing angle parameter indicating the viewing angle θ1 is acquired. These user U parameters define the video plane 50U described above.

  Further, the shape data of the flat object 10 onto which the illumination light emitted from the projector 2 is projected is acquired. This shape data is, for example, CAD data. Here, the viewpoint position and orientation parameter is a numerical value that defines a position on the X, Y, and Z axes and a rotation angle around the axis in a three-dimensional coordinate space. This viewpoint position and orientation parameter uniquely determines the distance L1 between the viewpoint position P1 and the flat object 10 and the attitude of the flat object 10 with respect to the viewpoint position P1. The shape data of the flat object 10 is defined as a shape region in a three-dimensional coordinate space based on electronic data created by CAD or the like. This shape data uniquely determines the shape of the flat object 10 viewed from the viewpoint position P1. The shape data of the flat object 10 and the parameters of the user U determine the correspondence between the coordinates of the video plane 50U and the coordinates on the flat object 10.

  In addition, as shown in FIG. 6, the projector 2 is installed, and the light control unit 1 includes the projection position P3 of the projector 2, the position and orientation parameter indicating the optical axis direction of the projector 2, and the projection angle of view of the projector 2. A projection field angle parameter indicating θ2 is acquired. The position and orientation parameters and the projection angle of view parameter of the projector 2 represent the image plane 50P that the projector 2 projects onto the flat object 10. When the image plane 50P is determined, it is determined on which coordinate of the flat object 10 the illumination light projected from the projector 2 is projected via the image plane 50P. That is, the position and orientation parameters and projection angle of view parameter of the projector 2 and the position and orientation parameters and shape data of the flat object 10 uniquely determine the range of the flat object 10 covered by the illumination light emitted from the projector 2. . When the projector 2 is a projector, the projection position P3 is defined by a back focus and a driving angle, and the projection angle of view θ2 is calculated from a horizontal and vertical projection range at a fixed distance from the projection position P3.

  The light control unit 1 then intersects the image plane 50P with a straight line connecting the pixels (a1, a2, a3, a4, a5) of the illumination light displayed on the flat object 10 and the projection position P3 of the projector 2. A plane image 100 ″ is formed by arranging pixels at (c1, c2, c3, c4, c5), and the plane image 100 ″ is projected onto the flat object 10. Then, the points c1, c2, c3, c4, c5 on the image plane 50P, the points a1, a2, a3, a4, a5 on the flat object 10, and the points b1, b2, b3, b4, b5 on the image plane 50U. In this way, the user U can visually recognize an image without distortion.

  Similarly, even if the irradiated object 10 is not in the shape of the flat object 10 but is in an arbitrary shape such as a dome shape, it is coated with illumination light without distortion, and the irradiated object 10 is visually recognized by the user U. Can be made. Consider a scene in which the irradiated object 10 is a dome-shaped object 10 as shown in FIG. 8A and the user U visually recognizes the lattice-shaped illumination light as shown in FIG. 8B. In this case, the user U can visually recognize the points a1, a2, a3, a4, and a5 on the dome-shaped object 10 on the extension line of the points b1, b2, b3, b4, and b5 on the video screen 50U. On the other hand, the projector 2 projects projection light onto the image plane 50P as shown in FIG. The projection light that has passed through the points c1, c2, c3, c4, and c5 on the image plane 50P is projected onto the points a1, a2, a3, a4, and a5 on the dome-shaped object 10, and the image shown in FIG. It is visually recognized as points b1, b2, b3, b4, b5 on the surface 50U. Therefore, the projector 2 projects a flat image 100 ″ distorted as shown in FIG. 9B on the image surface 50 </ b> P. On the other hand, the user U can visually recognize a flat image 100 without distortion as shown in FIG.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a block diagram of the illumination system to which this invention is applied. It is a block diagram which shows the functional structure of the illumination system to which this invention is applied. It is a top view which shows a mode that the leakage light has generate | occur | produced in the illumination system to which this invention is applied. It is a figure which shows a user's viewpoint position with respect to a flat irradiated object, a viewing angle, and distance in the illumination system to which this invention is applied. It is a figure explaining the image | video which a user visually recognizes in the illumination system to which this invention is applied, seeing a flat irradiated object from a user. It is a figure which shows the projection position of the irradiation light projection part with respect to a flat irradiation object, a projection angle of view, and distance in the illumination system to which this invention is applied. In the illumination system to which the present invention is applied, it is a diagram for explaining how light is projected from an irradiation light projection unit onto a flat object to be irradiated. It is a figure explaining the image | video which a user visually recognizes in the illumination system to which this invention is applied, seeing a dome-shaped irradiated object from a user. It is a figure explaining a mode that light is projected on the dome-shaped irradiated object from the irradiation light projection part in the illumination system to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light control unit 2 Projector 3 Camera apparatus 4 Personal computer 10 Irradiated object 11 Illumination light production | generation part 12 1st coating correction part 13 2nd coating correction part 14 3rd coating correction part 15 Leakage light correction part 20 Projection range 30 Imaging range 41 Display monitor 42 Keyboard 43 Mouse

Claims (4)

A projection means for projecting projection light including first irradiation light irradiated so as to cover the irradiated object and second irradiation light irradiated other than the irradiated object;
Irradiation light generating means for setting characteristics of the first irradiation light and the second irradiation light projected from the projection means;
An imaging unit having the projection range of the projection unit as an imaging range;
Referring to the video imaged by the imaging means, the first irradiation light detects the first leakage light projected on the object other than the object to be irradiated, and the second irradiation light is projected on the object to be irradiated. Leaked light detecting means for detecting the second leaked light,
Leakage light specifying means for specifying the positions of the first leakage light and the second leakage light detected by the leakage light detection means;
Leakage light correcting means for correcting the first leaked light and the second leaked light specified by the leaked light specifying means to be extinguished. A projection means for projecting projection light including first irradiation light irradiated so as to cover the irradiated object and second irradiation light irradiated other than the irradiated object;
Irradiation light generating means for setting characteristics of the first irradiation light and the second irradiation light projected from the projection means;
An imaging unit having the projection range of the projection unit as an imaging range;
Referring to the video imaged by the imaging means, the first irradiation light detects the first leakage light projected on the object other than the object to be irradiated, and the second irradiation light is projected on the object to be irradiated. Leaked light detecting means for detecting the second leaked light,
Leakage light specifying means for specifying the positions of the first leakage light and the second leakage light detected by the leakage light detection means;
Leakage light suppressing means for correcting the first leaked light and the second leaked light specified by the leaked light specifying means to be blurred.   The said irradiation light production | generation means sets any one of a brightness | luminance, luminous intensity, a light beam, color temperature, and presentation property as each characteristic of the said 1st irradiation light and the said 2nd irradiation light, It is characterized by the above-mentioned. The lighting device according to claim 1. The irradiation light generation means sets at least one of the first irradiation light and the second irradiation light as image light,
The illumination device according to claim 1 or 2, wherein a distortion correction process is performed so that the image can be seen without distortion when an image is projected on the irradiated object or the object other than the irradiated object.

Images