JP2003066527A - Method for projecting image onto screen by projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a projection image to be displayed in the state of an original image without depending on the correcting function of a projector device. SOLUTION: In the case of projecting an original image to be projected on a screen 4 with a projector constituted of a computer 2 in which the original image to be projected is recorded, and the projector device 3 connected to the computer 2, the original image to be projected is deformed by the computer 2 so that the projected image on the projection surface 5 may be approximate or equivalent to the original image to be projected based on the relation between the installation position of the projector device 3 and the three-dimensional coordinate of the projection surface 5, and the deformed image is outputted to the projector device 3, and then, projected by the projector device 3 toward the screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection method for projecting an image from a computer by means of a projector device, for example, on a curved film surface, and more particularly, because optical path distances in the image are different from each other. The present invention relates to a projection method on a film surface, which is prevented from being deformed and projected.

[0002]

2. Description of the Related Art In recent years, a projector device that takes out an image generated on a liquid crystal panel by transmission or reflection and projects it on a projection surface (screen) is used in various situations such as meetings and presentations. Has become.

When the projector device projects an image on the projection surface, if the optical axis of the projector device is perpendicular to the projection surface, a normal image without distortion can be projected on the projection surface as it is. become.

However, in practice, it is often necessary to install the image pickup device at a position that does not interfere with the field of view of the viewer. For example, when the image is projected obliquely to the projection surface, the optical path distances in the image are different from each other. As a result, the image becomes longer in the projection direction, and there is a problem that the image becomes a trapezoidal image whose long side is the image side on the side where the optical path distance is long.

In order to deal with such a problem, in recent years, a projector apparatus having a distortion correction means built therein has been provided. The distortion correction means is roughly composed of a horizontal conversion processing unit and a trapezoidal distortion correction processing unit. For example, in Japanese Unexamined Patent Publication No. 9-275538, the original image projected on the screen is changed to a horizontal conversion video unit. After converting to an image to generate a horizontally long converted image, this horizontally long image is corrected by a keystone distortion (trapezoidal distortion) correction unit to obtain a corrected image,
This corrected image is displayed on the liquid crystal display panel and projected.

[0006]

By the way, the applicant of the present invention uses the projector device to display an image on an inner membrane surface or an outer membrane surface of an existing large-scale membrane structure or a membrane surface separately installed separately. By projecting, and planning a combination of video and film, we aimed to create effects and advertising effects, and tried various experiments.

At that time, in the case of an existing membrane structure such as a baseball field or a soccer field and a membrane structure such as an event venue, the projector device may be a hindrance to a competition or a pedestrian. The installation location of the was naturally limited, and it was often necessary to project from an oblique direction.

In such a case, as described above, there arises a problem that the image becomes long in the projection direction and becomes a trapezoidal image whose long side is the image side on the side where the optical path distance is long. In addition, the projection surface is a curved surface in the existing film structure, the curvature changes in the middle, and the curvature is completely different between the longitudinal direction and the transverse direction. It has been found that a simple image correction function such as a horizontal conversion correction and a trapezoidal distortion correction, which is simply installed in the projector device, cannot sufficiently cope with the problem.

In particular, in the case of a projection plane where the curvature of the film surface changes midway or the curvature of the film surface is completely different between the longitudinal direction and the transverse direction, the concept of the conventional image correction method, that is, the entire image is made uniform. It turned out that the problem cannot be solved by the method of correcting to.

On the other hand, the projector device having the image correction function such as the horizontal conversion correction and the trapezoidal distortion correction has a problem that the higher the correction function is, the higher the price becomes.

Therefore, a first object of the present invention is to provide a projection method on a film surface by a projector device that can display a projected image in the state of an original image without depending on the correction function of the projector device. is there.

A second problem is that even if the projection surface has a complicated three-dimensional curved surface shape, the projection image can be displayed in the original image state without depending on the correction function of the projector device. Another object of the present invention is to provide a method of projecting onto a film surface by the projector device described above.

[0013]

In order to solve the above-mentioned problems, the present invention according to claim 1 provides a film surface comprising a computer in which a projection original image is recorded and a projector device connected to the computer. In projecting the projection original image onto the film surface by the projection device for the projection image based on the relationship between the installation position of the projector device and the three-dimensional coordinates of the film projection surface, the projection image on the film projection surface becomes the projection original image. The projection original image is modified in advance in the computer so as to be approximate or equivalent,
There is provided a projection method on a film surface by a projector device, which is characterized in that the modified image is output to the projector device and projected from the projector device toward the film surface.

In the present invention according to claim 1, the original image is deformed in advance in the computer, and the deformed image is sent to the projector device for projection. In a conventional projector device, the projector device is exclusively provided with a correction function. The correction method includes optically deforming an image, JP-A-5-37880 and JP-A-9-2.
As disclosed in Japanese Patent No. 75538, the trapezoidal distortion is corrected by thinning out the pixels on the image element according to the correction amount. There was a limit, and it could not be applied to the correction of the case where the film surface was a curved surface.
Therefore, in the present invention, the original image is processed and transformed on the computer in advance. Since the image processing in the computer can relatively easily and freely modify the image, it becomes possible to easily deal with the case where the film surface has a complicated three-dimensional shape. In the present invention, “approximate or equivalent to the projected original image” means that the enlarged projected image is projected in a substantially similar image state without distortion with respect to the original image. Further, the “image” in the present invention includes characters and other information.

As a second aspect of the present invention for solving the above-mentioned second problem, an apparatus for projecting onto a film surface, which comprises a computer in which a projection original image is recorded and a projector device connected to the computer. When projecting the projection original image on the film surface by dividing the projection original image into a plurality of blocks, the installation position of the projector device and the three-dimensional coordinates of the film projection surface corresponding to each of the divided block images. On the basis of the above relationship, the projection original image is modified in advance for each block image in the computer so that the projection image on the film projection surface of each block image is approximated or equivalent to the projection original image. A film by a projector device, which outputs an image to the projector device and projects the image from the projector device toward a film surface. Projection method to is provided.

The invention set forth in claim 2 is directed to the case where the three-dimensional shape of the film surface is considerably complicated. As described above, the existing film structure may have a change in the curvature of the film surface, or may have a completely different curvature of the film surface in the longitudinal direction and the transverse direction, which may not be supported by the deformation of the entire image. . Therefore, the original image is divided into blocks, and deformation is performed on each of the divided images so that the projected image becomes a regular image for each part.

According to the present invention of claim 3, the film material constituting the film projection surface is any one of an A-type film material, a B-type film material and a C-type film material. There is provided a method for projecting onto a film surface by the projector device according to the above.

In the present invention according to claim 4, the film material constituting the film projection surface is any one of an A-type film material, a B-type film material and a C-type film material and has a light transmittance of 12 % Or more, there is provided a projection method onto a film surface by the projector device according to claim 1.

According to a fifth aspect of the present invention, there is provided a method for projecting onto a film surface by a projector device according to any one of the first to fourth aspects, wherein the computer has a function of inverting a projected original image.

According to a sixth aspect of the present invention, the projection image on the film projection surface is approximated or equivalent to the original projection image based on the relationship between the installation position of the projector device and the three-dimensional coordinates of the film projection surface. The projection original image is modified in advance, or the projection original image is divided into a plurality of blocks, and the installation position of the projector device and the three-dimensional coordinates of the film projection surface corresponding to each divided block image Based on the relationship, the projection original image is deformed in advance for each of the block images so that the projection image on the film projection surface approximates or is equivalent to the projection original image, and the modified image is output to the projector device. There is provided a method for projecting onto a film surface by a projector device, which comprises projecting from a projector device onto a film surface.

In the invention according to claim 6, the computer is not an essential constituent condition. In recent years, there has been proposed an apparatus that inserts a PC card or CompactFlash (registered trademark) into the main body and supplies an image to the projector apparatus without using a computer. In such a case, the PC card or CompactFlash is used. The original projection image stored in (registered trademark) or the like may be modified in advance.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a projection state view on a film surface by a projector device, FIG. 2 is a projection view without image correction, and FIG. 3 is a flow chart of a projection method according to the present invention. It is a figure and FIG. 4 is the deformation | transformation figure of the image.

The projection device 1 on the film surface is composed of a computer 2 in which a projection original image is recorded and a projector device 3 connected to this computer, and a film surface 4 serving as an image projection surface. Is for an existing membrane structure, has a curved surface in the transverse direction (illustration direction) in the illustrated example, and has a plane in the longitudinal direction (direction penetrating the drawing).

First, the computer 2 is a commercially available OS.
You can use a general-purpose product such as a personal computer whose (operating system) is Windows, and the original image projected on the storage part is stored, and the software that allows you to arbitrarily transform this original image is built-in. ing.

On the other hand, although the commercially available projector device 3 can be used as it is, even if a correction function such as a landscape conversion function or a trapezoidal correction function is incorporated, the projection image is deformed as described above. Since it is performed on the computer 2, it is not used in the present invention. The performance of the projector device 3 used is 8000 ANSI in brightness.
Lumen products are also offered, but at least 2000AN
It is desirable to use SI lumens, preferably 3000 ANSI lumens or more.

On the other hand, although not shown, a three-dimensional shape device may be used to obtain information on the three-dimensional shape of the film surface 4. As the three-dimensional shape device, for example, a device such as a laser range finder or a transit device capable of measuring a distance and an intersection angle can be used, and the distance from the installation point of the projector device 3 to arbitrary plural points in the projection image can be measured. The coordinate values of the plurality of points can be obtained by measuring and measuring the horizontal angle and the vertical angle with respect to the known reference. The coordinate values may be set by desk calculation from the drawing of the film structure or the like.

Projection image 5 on the film surface by the projection device 1
2 shows that the lower side B has a longer optical path distance than the upper side A of the projected image 5 and the vertical cross-sectional shape of the film passing through the upper side A and the lower side B is a curved surface curved outward. As shown in the figure, the side edge becomes a curve that bulges outward, and
It becomes a trapezoidal image that is deformed long in the vertical direction. In the figure, the virtual image 6 on the reference projection plane S _K that is orthogonal to the optical axis O and passes through the upper side A is shown by a chain line.

In the present invention, as shown in the flow chart of FIG. 3, the installation position of the projector device 3 and the three-dimensional coordinate information of the film projection surface are input to the computer 2,
In order that the projected image 5 on the film surface 4 is close to or equivalent to the original image 6, the installation position of the projector device 3 and the film projection are performed on the original image 6 by the image transformation software installed in the computer 2. Based on the relationship with the three-dimensional coordinates of the surface, the projection original image 6 is deformed,
The deformed image 7 that has been deformed is displayed on the projector device 3
Is output to the film surface 4 from the projector device 3. Specifically, let the vertical dimension of the original image be l.
_The image is compressed and deformed at a ratio of ₀ / l ₁ , and each width dimension of the image is proportional to the ratio [S ₀ / (S ₁ , S ₂ , S _2
i , S _n )]. Incidentally, as shown in FIG. 4, the deformed image 7 is an inverted trapezoidal image in which side edges are curved inwardly and deformed short in the vertical direction.

When the deformed image 7 is projected from the projector device 3 onto the film surface 4, the projected image is distorted, and as a result, it is displayed in a normal image state.

The projected original image may be either a still image or a moving image, but in the case of a moving image, the image transformation processing in the computer 2 and the projector device 3 are performed.
To output continuously.

[Second Embodiment] Next, in the second embodiment, the film projection surface has a three-dimensionally complicated shape such as a change in curvature in the middle thereof or a completely different curvature in the longitudinal direction and the transverse direction. It shows an example of correspondence in some cases.

In this case, uniform deformation processing of the entire original image cannot be dealt with. Therefore, as shown in FIG. 5, the projected original image 6 is divided into a plurality of blocks,
In this example, it is divided into four block images A to D partitioned by a vertical center line and a horizontal center line, and the installation position of the projector device 3 and the divided block images A to D are divided.
Based on the relationship with the three-dimensional coordinates of the film projection surface corresponding to D, for each of the block images A to D such that the projection image on the projection surface of each of the block images A to D is approximate or equivalent to the original projection image. Then, the projection original image is modified.

FIG. 6 shows the image 7 after transformation. The A block image is transformed according to the projection plane of this A block image, and the B block image corresponds to the projection plane of this B block image. The C block image is changed to the C
Deformation corresponding to the projection surface of the block image is performed, and the D block image is subjected to deformation corresponding to the projection surface of the D block image. Then, the deformed modified image 7 is output to the projector device 3 and projected from the projector device 3 toward the film surface.

If the original image is divided into blocks and the deformation is performed for each block in this way, the projected image projected will be close to the original image even if the film surface 4 has a complicated three-dimensional shape. Or they can be equivalent. Even if the film surface 4 has a wavy shape as shown in FIG. 7, it is divided into blocks (B ₁ to
B ₈ ) is performed, each block original image is deformed so that the image on the projection surface becomes a normal state for each of these block images B _{1 to} B ₈ , and the deformed original image is input to the projector device 3 to project the image. By projecting from the device 3, it is possible to obtain a video image that is close to or equivalent to the original image on the projection surface.

By the way, the projected film surface 4 may be any one of the A-type film material, the B-type film material and the C-type film material (film structure building technology standard). The A-type membrane material is a membrane material obtained by coating a glass fiber woven fabric with a resin containing tetrafluoroethylene resin as a main component, and the B-type membrane material is a glass fiber woven fabric made of vinyl chloride resin, chloroprene rubber, and chlorosulfin. Membrane materials coated with modified polyethylene rubber and similar materials. Class C membrane materials are polyamide-based, polyaramid-based, polyester-based or polyvinyl alcohol-based fiber fabrics with vinyl chloride resin, chloroprene rubber, chlorosulfinized polyethylene rubber and others. Membrane material coated with something similar to. When projecting the film onto the film surface from the inside of the film to show the projected image to pedestrians outside the room, the light transmittance of the film is 12%. The above is desirable. When the light transmittance is less than 12%, the projected image becomes dark and the brightness and the saturation decrease.

The projection surface may be either the inner film surface or the outer film surface of the existing film structure. For example, when an image projected from the inside is shown to a person who is also inside the film surface, a normal image is formed. In order to project and project the image projected from the inside to the human outside the film surface, it is possible to project the reverse image,
It is desirable that the computer 2 has a function of inverting the projected original image.

In the above embodiment, the computer 2 is arranged adjacent to the projector device 3 to supply the image, but in recent years, without using the computer,
For example, PC card or Compact Flash (registered trademark)
There has been proposed a device that inserts a camera into a main body and supplies an image to a projector device. Therefore, in such a case, the projection original image stored in the PC card, the compact flash (registered trademark) or the like may be modified in advance.

[0039]

As described above in detail, according to the present invention, the projected image can be displayed in the original image state without depending on the correction function of the projector device. Further, even when the projection surface has a complicated three-dimensional curved surface shape, the projection image can be displayed in the original image state without depending on the correction function of the projector device.

[Brief description of drawings]

FIG. 1 is a projection state diagram on a film surface by a projector device.

FIG. 2 is a projection diagram when there is no image correction.

FIG. 3 is a flowchart of a projection method according to the first exemplary embodiment.

FIG. 4 is a modified view of the image.

FIG. 5 is a block division diagram for image deformation in the second embodiment.

FIG. 6 is an image diagram after the deformation.

FIG. 7 is a block division diagram when the film surface 4 is corrugated.

[Explanation of symbols]

1 ... Projection device, 2 ... Computer, 3 ... Projector device, 4 ... Film surface, 5 ... Projected image

Claims (6)

[Claims] 1. When projecting the projection original image on a film surface by a projection device for a film surface, which comprises a computer having a projection original image recorded therein and a projector device connected to the computer, the projector device is provided. Based on the relationship between the installation position of the film and the three-dimensional coordinates of the film projection surface, the computer preliminarily deforms the projection original image so that the projection image on the film projection surface approximates or is equivalent to the projection original image. A projection method on the film surface by the projector device is characterized in that the modified image is output to the projector device and projected from the projector device toward the film surface. 2. When the projection original image is projected onto a film surface by a projection device for a film surface, which comprises a computer in which a projection original image is recorded and a projector device connected to the computer, The image is divided into a plurality of blocks, based on the relationship between the installation position of the projector device and the three-dimensional coordinates of the film projection surface corresponding to each of the divided block images,
The projection original image is modified in advance for each block image in the computer so that the projection image on the film projection surface of each block image is approximated or equivalent to the projection original image, and the modified image is output to the projector device. Then
A method of projecting onto a film surface by a projector device, comprising: projecting from a projector device onto a film surface. 3. The projector device according to claim 1, wherein the film material forming the film projection surface is any one of an A-type film material, a B-type film material, and a C-type film material. Projection method on the film surface. 4. The film material forming the film projection surface is any one of an A-type film material, a B-type film material and a C-type film material and has a light transmittance of 12% or more. 2. A projection method onto a film surface by the projector device according to any one of 2 and 3. 5. The method for projecting onto a film surface by a projector device according to claim 1, wherein the computer has a function of inverting a projected original image. 6. Based on the relationship between the installation position of the projector device and the three-dimensional coordinates of the film projection surface, the projection original image is preliminarily set so that the projection image on the film projection surface approximates or is equivalent to the projection original image. Modification is added, or the projection original image is divided into a plurality of blocks, based on the relationship between the installation position of the projector device and the three-dimensional coordinates of the film projection surface corresponding to each of the divided block images, Each of the block images is modified in advance so that the projection image on the film projection surface approximates or is equivalent to the projection original image, and the modified image is output to the projector device to the film surface from the projector device. A method for projecting onto a film surface by a projector device, which comprises projecting the image toward a film.