JP2009271161A - Image projection device and image projection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that a change of the actual position of an object reflected on an image cannot be felt by a projection image. <P>SOLUTION: This image projection device has an adjustment function for focusing position of an projected image and projects the projected image. The image projection device comprises an acquisition part which acquires the focusing position information accompanying the projected image, a setup part which sets up the focusing position of the projected image based on the focusing position information, and an adjustment part which adjusts the focusing position of the projected image to the set up focusing position using the adjustment function. In such a configuration, the focusing position of the projected image is set up based on the focusing position information accompanying the projected image. As a result, a viewer can check a spatial change of the focusing position of the projected image from the actual travel distance of a screen by moving the screen and reflecting the focused projected image onto the screen. That is, the viewer can feel the change of the spatial position of the object reflected on the projected image with the position of the screen. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image projecting apparatus and an image projecting method, and more particularly to a technique for adjusting a focus position of a projected image.

  The projector is used as an image projection apparatus that projects an image onto a screen installed at a predetermined distance. In the past, many techniques have been proposed for correctly focusing an image on the screen so that the image projected on the screen is not blurred when the projector is used (for example, Patent Document 1 and Patent Document 2). ).

Japanese Patent Laid-Open No. 6-3777 JP-A-6-27431

  By the way, in an image obtained by photographing a subject using a photographing device such as a digital camera, there are many cases where the position of the photographed subject exists at a different distance from the photographing device. When images taken at different distances to the subject are projected as projected images by the projector, the image is projected so that the image is correctly focused on the screen using, for example, the technique disclosed in Patent Document 1. Is normal. Therefore, if the projected image is correctly focused on the screen, the imaging position of the subject when projected from the projector is always fixed at the position of the screen installed at a predetermined distance from the projector. The

  Then, the subject always stays at the screen position even though the position of the captured subject is actually approaching or moving away from the viewer of the projected image. For this reason, the viewer cannot experience the actual position change that occurs in the subject in the image by the projected image.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An image projection apparatus that has a function of adjusting a focus position of a projection image and projects the projection image, and an acquisition unit that acquires focus position information incidental to the projection image; A setting unit that sets a focus position of the projection image based on the focus position information; an adjustment unit that adjusts the focus position of the projection image to the set focus position using the adjustment function; It is provided with.

  According to this configuration, the focus position of the projection image is set based on the focus position information incidental to the projection image. As a result, the viewer can confirm the spatial change of the in-focus position of the projected image from the actual moving distance of the screen by moving the screen and projecting the focused projected image on the screen. . That is, the viewer can experience a change in the spatial position of the subject shown in the projected image by the position of the screen.

  Application Example 2 In the image projection device, the projection image is a captured image obtained by capturing an image of a subject using an imaging device, and the acquisition unit specifies the distance of the subject from the imaging device. Image data of a captured image is acquired as the in-focus position information.

  For example, data recorded in a format that holds shooting information including the distance to the subject at the time of shooting as metadata, such as Exif (registered trademark), may be attached to the image data of the shot image. Therefore, when the projected image is a captured image, distance data that specifies the imaging distance to the subject can be recorded as metadata. Therefore, when the image data of the projection image is image data in which the distance data of the subject is recorded, the shooting distance to the subject in the projection image can be obtained by reading the recorded distance data from the image data. it can. As a result, by setting the in-focus position of the projection image according to the acquired shooting distance to the subject, the viewer can experience the change in the position of the subject in the image with the projection image. Become.

  Application Example 3 In the image projecting device, the projected image is a captured image obtained by capturing an image of a subject using an image capturing device, and the acquisition unit applies the captured image to the captured image using image data of the captured image. An image ratio indicating the size of the image of the subject is calculated, and the calculated image ratio is acquired as the in-focus position information.

  In principle, when the subject is close to the imaging device, the subject image is larger than the entire screen size of the captured image. Conversely, when the subject is far from the imaging device, the subject image is small. Therefore, if an image ratio (for example, area ratio) indicating the size of the subject image with respect to the captured image is calculated using the image data, a change in the shooting distance to the subject can be acquired based on the calculated image ratio. it can. As a result, by adjusting the in-focus position of the projection image according to the change in the shooting distance to the acquired subject, the viewer can experience the change in the position of the subject in the image with the projection image. It becomes possible.

  Application Example 4 In an image projection apparatus having an adjustment function of a focus position of a projection image, an image projection method for projecting the projection image, the step of acquiring focus position information incidental to the projection image; A step of setting a focus position of the projection image based on the focus position information; a step of adjusting the focus position of the projection image to the set focus position using the adjustment function; It is provided with.

  According to this method, the in-focus position of the projection image is set based on the in-focus position information attached to the projection image. As a result, the viewer can confirm the spatial change of the in-focus position of the projected image from the actual moving distance of the screen by moving the screen and capturing the projected image focused on the screen. . That is, the viewer can experience a change in the spatial position of the subject shown in the projected image by the position of the screen.

  Hereinafter, the present invention will be described based on examples. FIG. 1 is an explanatory diagram for explaining an outline of a projector 100 as an image projection apparatus according to an embodiment embodying the present invention.

  The projector 100 includes a lamp 20 as a light source for projecting an image on a screen 91, a liquid crystal display (hereinafter referred to as an LCD) 30 as a light modulation element that controls output light from the lamp 20, and an image to be projected. A projection lens 80 has a so-called focus adjustment function that adjusts the in-focus position, and enlarges and projects an image displayed on the LCD 30 onto the screen 91 as a projection image. Of course, the projector 100 adopts a configuration in which the output light from the lamp 20 is dispersed, each spectral light is modulated by a plurality of (for example, three) LCDs 30, and then each light-modulated spectrum is condensed and projected. It is also possible to do.

  The projection lens 80 has a so-called focus adjustment function that adjusts a focus position of an image to be projected by rotation of a lens barrel portion (not shown) constituting the projection lens 80. The lens barrel is rotated by the motor 40. That is, a gear (not shown) formed in the lens barrel portion is engaged with a gear 41 that is rotated by the motor 40, and the rotation of the gear 41 that rotates according to the rotation of the motor 40 (including normal rotation and reverse rotation). The lens barrel rotates and focus adjustment is performed.

  The projector 100 includes a lamp driving unit 120 and an LCD driving unit 130 for executing the lighting and extinguishing of the lamp 20, the image display on the LCD 30, and the forward / reverse rotation of the motor 40 for each of the lamp 20, the LCD 30 and the motor 40. A motor driving unit 140 is provided.

  In addition, the projector 100 processes the input image (I / F) 10 that captures the projected image as image data suitable for processing by the projector 100 and the image data for display that is displayed on the LCD 30. Or an image data processing unit 150 for extracting a predetermined image data area. The display image data drives the LCD 30 via the LCD driving unit 130 and displays a projection image on the LCD 30.

  Further, the projector 100 includes a controller 110 that controls the operation of the entire projector. The controller 110 is configured by a computer including a CPU, a ROM, a memory such as a RAM. The lamp driving unit 120, the LCD driving unit 130, the motor driving unit 140, and the image data processing unit 150 are each set according to a program stored in the ROM while saving or reading data in the RAM as necessary. Control.

  In particular, the controller 110 functions as an acquisition unit 160, a setting unit 170, and an adjustment unit 180 by controlling the motor driving unit 140 and the image data processing unit 150. The acquisition unit 160 acquires information on the focus position of the projection image attached to the projection image (hereinafter referred to as “focus position information”) from the image data of the projection image. The setting unit 170 sets the focus position of the projection image based on the acquired focus position information. The adjustment unit 180 drives the motor 40 to adjust the focus position of the projection image to the set focus position. In this way, the controller 110 executes the adjustment process of the in-focus position of the projection image.

  Of course, the controller 110 governs processing related to functions provided in the projector 100 other than the above as necessary. For example, a cooling function for the lamp 20 and the LCD 30, or a technique disclosed in the above-described Patent Document 1 or Patent Document 2, that is, a function for determining whether or not an image projected on the screen is correctly focused. .

  Next, in order to facilitate understanding of the projection processing of the projection image performed by the projector 100, the manner of setting the in-focus position performed by the controller 110 will be described in advance with reference to FIGS. FIG. 2 is a schematic diagram for explaining a situation where two projection images are captured by the imaging device. FIG. 3 is a schematic diagram for explaining how to set the in-focus position for two photographed projection images.

  As shown in FIG. 2, in this embodiment, as an example, a digital camera (hereinafter simply referred to as “camera”) DC serving as a photographing apparatus is rotated and approaches a baseball ball (hereinafter simply referred to as “ball”) BL as a subject. A case was assumed. The captured image captured by the camera DC is used as a projection image projected from the projector 100.

  As shown in the figure, the projection image TG1 is a photograph of a ball BL present at a distance FL1 to the camera DC. The second projection image TG2 is a photograph of the ball BL existing at a distance FL2 where the distance to the camera DC is closer to the distance FL1 than the distance FL1.

  The camera DC is assumed to shoot without changing the angle of view, that is, without performing zooming, in shooting the two projection images TG1 and TG2. Therefore, when the ball BL as the subject approaches the camera DC, the image of the ball BL in the screen of the photographed image increases, so that the sizes of the balls BL that are reflected in the projection image TG1 and the projection image TG2 are different. . That is, as shown in the lower side of FIG. 2, the image BL2 of the ball BL in the projection image TG2 is larger than the image BL1 of the ball BL in the projection image TG1.

  Next, with reference to FIG. 3, how to set the respective in-focus positions when projecting the two projection images TG1 and TG2 from the projector 100 will be described.

  As shown in the drawing, in this embodiment, the projection image TG1 in which the ball BL is farther from the camera DC is brought into focus on the screen 91 installed at a distance L1 from the projector 100. Project to. At this time, the vertical dimension of the projection image TG1 captured on the screen 91 is the length H1, and the vertical dimension (that is, the diameter) of the image BL1 reflected in the projection image TG1 is the length h1. To do.

  Next, assuming that the projection image TG2 is projected onto the screen 91, the image BL2 in the projected image TG2 is larger than the image BL1 in the projection image TG1 as described in FIG. Therefore, the vertical dimension of the projection image TG2 captured on the screen 91 is the same length H1 as the projection image TG1, but at this time, the size of the image BL2 in the projection image TG2 on the screen 91 is the image BL1. It is assumed that the length is larger than the vertical dimension, and here the length is h2.

  As described above, the size of the ball BL as the subject does not actually change and is the same size. Therefore, the in-focus position of the projection image TG2 is set at a position where the size of the image BL2 on the screen is the same as that of the image BL1. That is, in this embodiment, as shown in the figure, the in-focus position is set at a position where the distance from the projector 100 is a distance L2 shorter than the distance L1 by a distance ΔL.

  In this way, for example, when the screen 92 is installed at the set in-focus position, the projection image TG2 is formed on the installed screen 92 as a projection image TG2a having a vertical dimension H2 shorter than the length H1. Image. Therefore, as the vertical dimension of the screen of the projection image TG2 is shortened from the length H1 to the length H2 as the projection image TG2a, the vertical dimension of the image BL2a is the same as the length h1 of the vertical dimension of the image BL1. It becomes.

  The distance L2 can be calculated by L2 = (h1 / h2) × L1, as can be easily understood from the schematic diagram shown in FIG. As a result, when the screen 92 is installed at the in-focus position of the projection image TG2 projected from the projector 100, the distance between the screen 91 and the screen 92 is a distance ΔL (= L1-L2), and this distance ΔL Thus, the movement of the ball BL can be actually experienced.

  Then, the projection processing of the projection image which the projector 100 implements is demonstrated using the process flowchart of FIG. In the present embodiment, it is assumed that the process is started when the user inputs the start of the process using an input unit (not shown) provided in the projector 100.

  When the processing here is started, first, image data of a projection image is acquired in step S110. The controller 110 records and stores the image data of the projected image in the memory via the input I / F 10. In the present embodiment, it is assumed that the two projection images TG1 and TG2 described above are recorded and stored. The projection images TG1 and TG2 are images each having a predetermined number of pixels in the vertical and horizontal directions, and the image data of the projection images TG1 and TG2 is expressed by RGB 8-bit gradation values for each pixel. Data.

  Next, in step S120, focus position information is acquired for the projection image. In the present embodiment, using the stored image data of the projection images TG1 and TG2, data indicating the size of the subject image with respect to the entire screen of the projection images TG1 and TG2 is acquired as in-focus position information. The process performed in step S120 will be described using the flowchart of FIG.

  First, in step S121, a subject to be adjusted in focus position is specified. In the present embodiment, as described above, the subject for which the focus position is adjusted in each of the projection images TG1 and TG2 is the ball BL. Therefore, the user of the projector 100 uses the input means (not shown) provided in the projector 100 to predetermine a predetermined value for each R (red), G (green), and B (blue) indicating the ball BL. Input image data having gradation values. Of course, in the case where the image data of each of the projection images TG1 and TG2 has been subjected to a labeling process in which a sign indicating that the subject is the subject of adjustment of the in-focus position, the labeled pixels are read. Thus, the subject (ball BL) may be specified.

  Next, in step S122, image data of the projection image corresponding to the subject is extracted. In this embodiment, image data having predetermined gradation values for each of R, G, and B, each gradation data indicating the ball BL, is extracted as image data corresponding to the subject in the projection image.

  In step S123, the image area of the subject is calculated. The controller 110 counts pixels having image data corresponding to the subject, and calculates the total number of counted pixels as the image area of the subject.

  Next, in step S124, the area ratio of the subject image to the screen area of the projection image is calculated as in-focus position information. First, the controller 110 reads a predetermined number of pixels in the vertical and horizontal directions constituting the projection image, and calculates the number of pixels of the entire projection image. The calculated number of pixels represents the entire screen area of the projection image. Then, the area ratio of the image of the ball BL to the screen area of each of the projection images TG1 and TG2 is calculated using the image area of the ball BL calculated in step S123. This calculated area ratio becomes in-focus position information.

  Note that in this embodiment, assuming that a plurality of projection images having different numbers of vertical and horizontal pixels constituting the projection image are input as projection images input to the projector 100, the subject to the screen area of the projection image is input. Although the area ratio of the image is calculated, if the input projection images are all images having the same number of vertical and horizontal pixels, one dimension (not the area ratio) representing the size of the subject ( For example, it may be a vertical dimension). Incidentally, this area ratio and one dimension correspond to the image ratio described in the claims.

  Returning to FIG. 4 again, in step S130, the focus position is set based on the focus position information. In this embodiment, an image with a small area ratio of the image of the ball BL, that is, a projection image TG1 is projected onto a screen 91 (see FIG. 3) installed at a predetermined distance L1 from the projector 100, and the image of the ball BL An image having a large area ratio, that is, a projection image TG2 is projected to a position closer to the projector 100 side than the screen 91.

  Here, in this embodiment, the screen 91 is fixedly installed. Therefore, when the distance from the projector 100 is behind the screen 91, the in-focus position of the projected image cannot be confirmed. Therefore, the projected image that projects the image with the smallest area ratio of the image of the ball BL onto the screen 91. Although TG1 is used, when the screen 91 is not fixedly installed, it is needless to say that the projection order of the projected images is not limited to this.

  Here, in this embodiment, it is assumed that the distance L1 from the projector 100 to the screen 91 is stored in the memory in the controller 110 in advance. Therefore, the controller 110 reads the stored distance L1, and sets this distance L1 as the in-focus position for the image with the smaller area ratio of the image of the ball BL, that is, the projection image TG1.

  If the projector 100 has an autofocus mechanism, a predetermined image may be projected on the screen 91 to check the focus position in advance, and the determined focus position may be stored as the distance L1. .

  Subsequently, the controller 110 uses the distance L1 and the area ratio of the image of each ball BL in the projection image TG1 and the projection image TG2 for the other image, that is, the projection image TG2, to determine the in-focus position. Is calculated and set. As described above, in FIG. 3, it has already been described that the distance L2 from the projector 100 to the in-focus position of the projection image TG2 can be calculated using the lengths h1 and h2 of the vertical dimensions of the images of the respective balls BL. Here, considering the case where the screen areas of the projection image TG1 and the projection image TG2 are not the same, instead of the lengths h1 and h2 of the vertical dimensions of the images of the respective balls BL, the area ratio of the images of the respective balls BL is changed. Obviously, it should be used. Therefore, the controller 110 calculates the distance L2 calculated by the calculation formula “L2 = (area ratio of the image of the ball BL in the projection image TG1 / area ratio of the image of the ball BL in the projection image TG2) × L1” of the projection image TG2. Set as the in-focus position.

  Next, in step S140, a projection image is selected. In the present embodiment, it is assumed that the user of the projector 100 selects a projection image to be projected using an input unit (not shown) provided in the projector 100. Therefore, the controller 110 selects the projection image according to the selection data of the projection image input from the input unit. In this embodiment, it is assumed that the projection image TG1 is selected as the first projection image. Of course, the controller 110 may automatically select the image with the smallest area ratio of the image of the ball BL as the first projection image.

  Next, in step S150, the focus position of the projection image is adjusted. The controller 110 controls the motor drive unit 140 to drive the motor 40 and rotate the projection lens 80 to first adjust the focus position (distance L1) set for the projection image TG1.

  Next, in step S160, the projection image is projected. The controller 110 first projects the projection image TG1 by controlling the lamp driving unit 120 to turn on the lamp 20, and controlling the LCD driving unit 130 to display the projection image on the LCD 30.

  Next, in step S170, it is determined whether or not all the projected images have been projected. If there is a projection image that has not been projected as a result of the determination (NO), the process returns to step S140, the next projection image TG2 is selected, and the processes in and after step S140 are repeated. Of course, in the projection image TG2, the controller 110 controls the motor driving unit 140 to drive the motor 40, rotates the projection lens 80, and adjusts the in-focus position to the distance L2 (step S150). TG2 is projected (step S160).

  In the present embodiment, all projection images are projected by the projection image TG2 (step S170: YES), and the projection image projection processing performed by the projector 100 ends.

  Now, according to the projection processing of the projection image according to the present embodiment, the image of the ball BL projected on the screen 91 by the projection image TG1 is separated from the screen 91 in the projection image TG2 to be projected next, and the projector An image is formed at a position approaching 100. Therefore, the viewer of the projected image installs the image of the imaged ball BL on the screen by installing a screen having at least a size capable of forming the entire image of the ball BL at the image formation position of the projected image TG2. You can watch at. That is, the movement amount of the ball BL can be experienced by the movement amount of the screen.

  The embodiments of the present invention have been described using the embodiments. However, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the spirit of the present invention. Of course. Hereinafter, a modification will be described.

(First modification)
In the above embodiment, in the processing step S120 of the flowchart shown in FIG. 4, the area ratio of the image of the ball BL as the subject to the screen area of the projection image TG1 (TG2) is acquired as the focus position information. Of course, it is not limited to this. For example, image data of a captured image that specifies the distance from the photographing device of the ball BL that is the subject may be acquired as the focus position information.

  For example, data recorded in a format that holds additional information including the distance to the subject at the time of shooting as metadata, such as Exif (registered trademark), may be attached to the image data of the shot image. Therefore, when the projected image is a captured image, distance data that specifies the distance to the subject can be recorded as metadata.

  Therefore, when the image data of the projection image is image data in which the distance data to the subject is recorded, in the flowchart shown in FIG. 4, in the step S120, the distance data is acquired as in-focus position information. Specifically, the controller 110 reads the distance data recorded as metadata from the image data, thereby acquiring the distance data as in-focus position information about the projection image.

  Subsequently, in step S130, the focus position of the projection image projected from the projector 100 is set based on the acquired distance data. At this time, in this modification, a value obtained by multiplying the value indicated by the distance data by a predetermined coefficient is set as the in-focus position. Specifically, since the distance L1 from the projector 100 to the screen 91 shown in FIG. 3 corresponds to the distance FL1 from the camera DC to the ball BL shown in FIG. 2, the value of these ratios (= L1 / FL1) is used as a predetermined coefficient.

  Of course, if the value of the predetermined coefficient is “1”, the shooting distance from the camera DC to the subject is equal to the distance from the projector 100 to the imaging position of the projection image. You can experience the actual movement distance of the subject. Accordingly, when there is no distance restriction on the installation position of the screen, it is preferable to project the value of the predetermined coefficient as “1” in this way. In this way, for example, utilization as shown in FIG. 6 is possible.

  FIG. 6 shows a state in which a photographed image obtained by photographing a building is projected from the projector 100. First, the projection image TG1 in which the wall surface Aw of the building A is the subject is projected on a screen (not shown) based on the distance data to form the wall surface Aw. Subsequently, the projection image TG2 with the wall surface Bw of the building B as the subject is projected so that the wall surface Bw forms an image at the in-focus position set based on the distance data. The viewer moves the screen or prepares another screen to form an image of the wall surface Bw on the screen. At this time, the distance between the screens indicates the actual depth of the building B. As a result, the viewer can experience the depth of the building B depending on the distance between the screens.

  In addition, in this modification, when distance data can be attached to the image data of a projection image, it is good also as projecting the some projection image which has the image data which is the same image and different distance data. In this way, for example, the position where one subject is present can be confirmed spatially, so that the viewer of the projected image can experience a preferred position where the subject should be present, for example.

(Second modification)
In the embodiment described above, two projected images are projected. However, the present invention is not limited to this. Of course, two or more projected images may be projected. As an example, an example in which there are three projection images is shown in FIG.

  FIG. 7 is an explanatory diagram showing a state in which an explanatory text of a picture is projected as a projection image. As shown in the drawing, the projection images TG1, TG2, and TG3 are positions at which the distances from the projector 100 are distances L1, L2, and L3, respectively, so that the images are formed at substantially front positions of the paintings A, B, and C, respectively. Is set as the in-focus position and projected from the projector 100.

  Accordingly, the viewer of the picture copies the projected image projected on his / her hand or prepared screen with the imaging positions of the projected images TG1 to TG3 projected in a predetermined order (for example, the order of the pictures to be introduced). Search by moving while. As a result of the movement, the explanatory text of the projected picture can be imaged on its own hand or a prepared screen at a substantially front position of each picture A, B, C. The explanation of C can be read at a position substantially in front of the painting.

(Third Modification)
In the above embodiment, the user of the projector 100 selects a projection image to be projected in step S140 of FIG. 4, but it is needless to say that the present invention is not limited to this. For example, as illustrated in Modification 2 above, it may be automatically projected in a predetermined order. Or it is good also as projecting at random. In this way, for example, utilization as shown in FIG. 8 is possible.

  FIG. 8 shows a state in which a ball image BL1 and an image BL2a as subjects in the projection image TG1 and the projection image TG2 are used as a game for catching a ball by forming an image on a screen SRN having a baseball glove shape. It is explanatory drawing shown. 8A shows a case where the projection image is projected from the projector 100 in the horizontal direction, and FIG. 8B shows a case where the projection image is projected from the projector 100 in the vertical direction.

  As shown in FIG. 8A, the game player moves the screen SRN in the shape of a baseball glove in the horizontal direction, and forms a ball image BL1 at a distance L1 from the projector 100 to catch the ball. To do. Next, the ball is caught by forming an image BL2a of the ball at a position at a distance L2 from the projector 100. In FIG. 8B, the screen SRN having the shape of a baseball glove is moved in the vertical direction to find the in-focus position of the ball, and the ball image BL1 at each of the distances L1 and L2 from the projector 100. , BL2a can be imaged on the screen SRN to enjoy the catching action. As another application example of this type, the projected image may be a butterfly and the screen may be a net.

  At this time, the projector 100 is equipped with the technique disclosed in Patent Document 1 or Patent Document 2, that is, a function for determining whether or not the image projected on the screen is correctly focused. It is preferable to project the next projection image when it is determined that the in-focus state is obtained. In this way, the game player can grasp the correctness of the catching action by determining that the in-focus state has been achieved.

(Fourth modification)
In the above-described embodiment, the projector 100 using the LCD 30 as the light modulation element is illustrated as the image projection apparatus. However, in addition to such a projector, an overhead projector (OHP) or a slide projector may be used as the image projection apparatus. Is possible. In such overhead projectors and slide projectors, the projection image is not supplied as image data, but is supplied as a sheet or slide. Processing similar to that in the embodiment can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing explaining the outline | summary of the projector as an image projection apparatus used as one Example of this invention. The schematic diagram for demonstrating a mode that a projection image is image | photographed with an imaging device. The schematic diagram for demonstrating a mode that the focus position is set about a projection image. 6 is a flowchart of projection processing of a projection image performed by the projector according to the present embodiment. The flowchart which shows the acquisition process of the focus position information of a projection image in a present Example. Explanatory drawing which shows a mode that the picked-up image which image | photographed the building is projected from a projector. Explanatory drawing which showed a mode that the explanatory note of a picture is projected as a projection image. It is explanatory drawing which shows a mode that it utilized as a game which forms the to-be-photographed object image on a screen on a screen, (a) projects a projection image to a horizontal direction, (b) projects a projection image to a perpendicular direction Indicates when to do.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Input I / F, 20 ... Lamp, 30 ... LCD, 40 ... Motor, 41 ... Gear, 80 ... Projection lens, 91 ... Screen, 92 ... Screen, 100 ... Projector, 110 ... Controller, 120 ... Lamp drive part, DESCRIPTION OF SYMBOLS 130 ... LCD drive part, 140 ... Motor drive part, 150 ... Image data processing part, 160 ... Acquisition part, 170 ... Setting part, 180 ... Adjustment part.

Claims (4)

An image projection apparatus that has a function of adjusting a focus position of a projection image and projects the projection image,
An acquisition unit for acquiring in-focus position information attached to the projection image;
A setting unit for setting a focus position of the projection image based on the focus position information;
An adjustment unit that adjusts the in-focus position of the projected image to the set in-focus position using the adjustment function;
An image projection apparatus comprising: The image projection apparatus according to claim 1,
The projected image is a captured image obtained by imaging a subject using an imaging device,
The image projection device, wherein the acquisition unit acquires image data of the captured image that specifies a distance of the subject from the imaging device as the focus position information. The image projection apparatus according to claim 1,
The projected image is a captured image obtained by imaging a subject using an imaging device,
The acquisition unit calculates an image ratio indicating the size of the image of the subject with respect to the captured image using image data of the captured image, and acquires the calculated image ratio as the in-focus position information. An image projection apparatus. In an image projection apparatus having an adjustment function of a focus position of a projection image, an image projection method for projecting the projection image,
Obtaining focus position information incidental to the projected image;
Setting a focus position of the projection image based on the focus position information;
Adjusting the in-focus position of the projected image to the set in-focus position using the adjustment function;
An image projection method comprising:

Images