JP2004072623A - Adjustment method of video image projecting position in video image projection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adjustment method of video image projecting positions for facilitating the adjustment of the video projecting positions to be projected from each of a plurality of video image projectors in a video image projection system for displaying a composite image on a screen by video images to be projected from each of the plurality of video image projectors. <P>SOLUTION: The video image projectors 10 and 11 project a projecting position adjustment video image 12 including a lattice pattern 15 as a marker for adjusting the projecting positions and a projecting position adjustment video image 13 including a lattice pattern 16 respectively (a step S1) in a duplication part which mutually duplicates the video images to be projected. The lattice patterns 15 and 16 have mutually different colors and adjust the video image projecting positions (a step S4) until only a pattern having a composite color of them is displayed on the screen (a step S3) as confirming a degree of overlap of the lattice patterns 15 and 16 (a step S2). Consequently, a state that the adjustment of the video image projecting positions is completed and a state that the adjustment is incomplete are easily distinguished from the color of the pattern displayed on the screen. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image projection system that displays a composite image on a screen using images projected from each of a plurality of video projection devices, and to a method for adjusting a video projection position projected from each of the plurality of video projection devices.
[0002]
[Prior art]
In the video projection system as described above, the images projected from each of the plurality of video projection devices are overlapped with each other by a predetermined width at the boundary, so that a natural synthesized video can be obtained without breaking the boundaries of each video. It is configured to be able to. In such a video projection system, the following method is known as a conventional video projection position adjustment method for adjusting a projection position of a video projected from each of a plurality of video projection devices. FIG. 14 is a diagram for explaining the concept of an image projection position adjustment method in the conventional image projection system 100. FIG. 14 illustrates an example in which the video projection system 100 includes two video projection devices 101 and 102. In the conventional method of adjusting the image projection position, as shown in FIG. 14, a projection position adjustment image 103 including a grid pattern 105 is projected from an image projection device 101, and a grid having the same color and the same shape as the grid pattern 105 is generated from the image projection device 102. The projection position adjustment image 104 including the pattern 106 is projected. Each of these lattice patterns 105 and 106 is in a region of a predetermined width at the boundary between the projection position adjustment images 103 and 104, and this region is used when generating a composite image by the images projected by the image projection devices 101 and 102, respectively. This is an area where these images overlap each other. In the conventional method of adjusting the image projection position, the image projection positions of the image projection apparatuses 101 and 102 are adjusted until the grid pattern 105 and the grid pattern 106 overlap each other and are displayed as one grid pattern. .
[0003]
[Problems to be solved by the invention]
Here, the problem of the method of adjusting the image projection position in the conventional image projection system 100 will be described with reference to FIGS. FIGS. 15 and 16 show a case where the image projection positions of the two image projection devices 101 and 102 are separated by a half pitch at the pitch of the lattice, and a case where they are too close. As shown in FIGS. 15 and 16, in the conventional method of adjusting the video projection position, the grid pattern 105 and the grid pattern 106 are separated by a half pitch of the grid when the projection position of the video is too far or too close. Since the pattern displayed by に よ っ て looks like a pattern of the same color and the same shape, the two cannot be distinguished. Therefore, it has been difficult to determine whether the video projection positions of the video projection devices 101 and 102 should be separated from each other or should be closer to each other.
[0004]
Further, even if the grid patterns 105 and 106 overlap each other and it seems that the adjustment of the image projection position is completed, there are the following problems. FIG. 17 and FIG. 18 are enlarged views of a portion where perpendicular lines constituting the grid pattern intersect. FIG. 17 shows a case where the grid patterns 105 and 106 are completely overlapped, and FIG. The case where the patterns 105 and 106 are shifted by an amount of 1 dot or less is shown. In FIG. 18, the inside of the grid pattern 106 is shown as a hatched pattern to make it easy to see the shift between the grid pattern 105 and the grid pattern 106. However, the grid pattern 105 and the grid pattern 106 are actually the same color. It is. As shown in FIGS. 17 and 18, even though the grid patterns 105 and 106 overlap each other and appear to have been adjusted for the image projection position, there is a case where the two are completely overlapped and a shift of 1 dot or less. In some cases, since the grid pattern 105 and the grid pattern 106 have the same color, it is difficult to distinguish them. Therefore, it has been difficult to satisfactorily adjust the image projection positions of the image projection devices 101 and 102.
[0005]
The present invention has been made in order to solve the above problems, and in an image projection system that displays a composite image on a screen by an image projected from each of a plurality of image projection devices, an image projected from each of the plurality of image projection devices is provided. Provided is an image projection position adjustment method that facilitates adjustment of a projection position.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a method for adjusting a video projection position according to the present invention is directed to a video projection system that displays a composite video on a screen using video projected from a plurality of video projection devices. An image projection position adjustment method, wherein the plurality of image projection devices that project images having overlapping portions overlapping each other have different colors, and the plurality of image projection devices have different colors. The projecting step of projecting the projection position adjustment image including the markers overlapping each other when each of the overlapping portions is completed, and the plurality of image projecting devices projecting the images having the overlapping portions overlapping each other, respectively, Only the composite colors generated by overlapping the above markers are displayed on the screen. It is characterized in that it comprises an adjustment step of adjusting the image projecting position by each of the video image projector.
[0007]
According to the image projection position adjustment method of the present invention, among the plurality of image projection devices, those that project images having overlapping portions that overlap each other project the projection position adjustment image including a marker at each overlapping portion. I do. The markers included in each projection position adjustment image have different colors. Therefore, when these markers are completely overlapped and the adjustment of the image projection position is completed, the color inherent in each marker disappears, and only the pattern having the composite color generated by overlapping these markers is displayed on the screen. Since it is displayed above, whether or not the adjustment of the image projection position has been completed can be easily determined based on the displayed color. As a result, the adjustment of the image projection position becomes easy.
[0008]
In the method for adjusting a video projection position according to the present invention, it is preferable that the marker included in the projection position adjustment video projected from the plurality of video projection devices is a grid pattern.
[0009]
According to the present invention, the projection position of the image can be adjusted using the pitch of the grid as a guide, so that the projection position of the image can be easily adjusted. In addition, among the plurality of video projectors, those that project an image having overlapping portions overlapping each other project a projection position adjustment image including a grid pattern of a different color on each overlapping portion. Therefore, the case where the projection position of the image is distant by half the grid pitch and the case where the projection position is too close can be easily distinguished by the color of the grid pattern of the portion protruding by the half pitch. As a result, it is possible to easily determine in which direction the image projection position should be adjusted.
[0010]
In order to solve the above problems, a method for adjusting a video projection position according to the present invention is directed to a video projection system that displays a composite video on a screen using video projected from a plurality of video projection devices. A method of adjusting a video projection position, wherein one of the plurality of video projection devices, which projects a video having an overlapping portion overlapping each other, is a first video projection device including a band-shaped pattern in the overlapping portion. A first projection position adjustment image including a marker is projected, and the other image projection device adjusts the image projection position to the overlapping portion with a color different from the band-shaped pattern forming the first marker. Is completed, a plurality of bands whose end positions are separated by one dot step by step from those whose end portions are in contact with the band-shaped pattern constituting the first marker. Projecting a second projection position adjustment image including a second marker composed of the above-described pattern, the band-shaped pattern constituting the first marker, and the plurality of band-shaped constituting the second marker Of the intersection having a composite color generated by overlapping the band-shaped pattern forming the first marker and the plurality of band-shaped patterns forming the second marker while making the patterns orthogonal to each other. An adjusting step of adjusting the image projection positions of the one image projection device and the other image projection device based on the number.
[0011]
According to the image projection position adjustment method of the present invention, one of the plurality of image projection devices that projects an image having an overlapping portion that overlaps each other includes the first marker formed of a band-shaped pattern. A first projection position adjustment image is projected. Then, the other video projection device has a different color from the band-shaped pattern included in the first marker, and when the adjustment of the video projection position is completed, the band-shaped pattern included in the first marker and the edge of the band-shaped pattern included in the first marker. A second projection position adjustment image including a second marker composed of a plurality of band-shaped patterns whose end positions are separated step by step by one dot from those in contact with the part is projected. Then, when the image projection position is adjusted while making the first marker and the second marker orthogonal to each other, a plurality of band-shaped patterns constituting the first marker and a plurality of band-shaped patterns constituting the second marker are obtained. The number of intersections having a composite color generated by overlapping with each other indicates the shift amount of the image projection position in dot units. As described above, since the adjustment amount of the image projection position can be grasped in dot units, the adjustment of the image projection position becomes easier.
[0012]
In the method for adjusting a video projection position according to the present invention, the second marker extends in a direction perpendicular to the plurality of band-shaped patterns, and has the same width as the band-shaped pattern constituting the first marker. It has a band-shaped pattern, and the plurality of band-shaped patterns are constituted by those in which the position of the end is separated by one dot step by step from the one where the end is in contact with the band-shaped pattern extending in the vertical direction. Preferably, it is a feature.
[0013]
According to the present invention, when the adjustment of the image projection position is completed, of the second markers, a band-shaped pattern extending in a direction perpendicular to the plurality of band-shaped patterns and a band-shaped pattern constituting the first marker. Since the pattern completely overlaps, it is easy to know that the adjustment of the image projection position has been completed.
[0014]
In the method for adjusting a video projection position according to the present invention, among the plurality of video projection devices, the markers projected from each of the plurality of video projection devices that project a video having an overlapping portion that overlaps each other may have complementary colors. It is preferable to have the following relationship.
[0015]
According to the present invention, a plurality of video projectors that project video having overlapping portions overlapping each other project markers having complementary colors. Therefore, since the portion where these markers overlap is colorless, it becomes easy to visually understand the degree of progress in the above-described method for understanding the degree of adjustment of the image projection position by the overlap of the markers.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment) A method for adjusting a video projection position according to a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a flowchart illustrating a method for adjusting a video projection position according to the present embodiment. FIG. 2 is a diagram for explaining the concept of adjusting the image projection position in the image projection system 1 according to the present embodiment.
[0017]
As shown in FIG. 2, the video projection system 1 includes two video projection devices 10 and 11. Each of these video projectors 10 and 11 displays a composite video on the screen by projecting a video having an overlapping portion overlapping each other so that the overlapping portion overlaps on the screen. In this manner, when the overlapping portions of the images are projected so as to overlap each other, it is possible to display a synthesized image having a smooth joint. Then, as shown in FIG. 2, the video projection devices 10 and 11 display the projection position adjustment image 12 and the projection position adjustment image 13 respectively on a screen (not shown) in order to accurately overlap the respective overlapping portions on the screen. Project on top. The projection position adjustment image 12 includes a grid pattern 15 as a marker for adjusting the projection position in the overlapping portion described above, and the projection position adjustment image 13 includes a grid pattern as a marker for adjusting the projection position in the overlapping portion described above. 16 are included. The colors of the grid pattern 15 and the grid pattern 16 are different. The image projection position is adjusted according to the degree of the overlap between the lattice patterns 15 and 16. Hereinafter, the method of adjusting the video projection position will be described in detail.
[0018]
As shown in FIG. 1, first, the image projection devices 10 and 11 respectively project a projection position adjustment image 12 including a lattice pattern 15 and a projection position adjustment image 13 including a lattice pattern 16 at the initially arranged positions. (Step S1). FIG. 3 is an enlarged view of the lattice patterns 15 and 16. FIG. 3 shows an example of a grid pattern 15 projected from the video projection device 10 and a grid pattern 16 projected by the video projection device 11 at the initially arranged position. In FIG. ing. Further, the grid patterns 15 and 16 have different colors as shown in FIG. 3 (in FIG. 3, the hatched directions inside the grid patterns are different, so that the colors are different from each other. ).
[0019]
Returning to FIG. 1, next, it is determined whether or not the adjustment of the video projection positions of the video projectors 10 and 11 has been completed by checking the overlap of the grid patterns 15 and 16 (step S2) (step S3). ). At this time, as shown in FIG. 3, when the grid patterns 15 and 16 do not overlap, the video projection positions of the video projection devices 10 and 11 are adjusted again (step S4). By repeating such operations of steps S2 to S4, when the grid patterns 15 and 16 completely overlap and only the pattern having the combined color of both is displayed on the screen, the image projection devices 10 and 11 It is determined that the adjustment of the image projection position has been completed. FIG. 4 shows a state in which the grid patterns 15 and 16 are completely overlapped, and a pattern having a combined color of the two is displayed on the screen. In FIG. 4, the composite colors are represented by hatching patterns formed by diagonal lines crossing each other (hereinafter, in the drawings used in the description of this specification, the composite colors generated by combining the colors of the two patterns are represented by: It is represented by hatching patterns with oblique lines crossing each other.) In this way, by displaying only the pattern having the composite color on the screen, it can be easily understood that the adjustment of the image projection position is completed.
[0020]
FIG. 5 shows a case where the image projection positions of the image projection devices 10 and 11 are separated by a half pitch of the lattice, and FIG. 6 shows a case where the image projection positions of the image projection devices 10 and 11 are too close by a half pitch of the lattice. The case is shown. As described above, when the image projection positions of the image projection devices 10 and 11 are separated by a half pitch of the grid and when they are too close, the image projection devices 10 and 11 are determined by the colors appearing on both sides of the portion where the grid overlaps. It can be easily determined whether the projection position of the image is too far or too close. Therefore, it is possible to easily determine whether the video projection positions of the video projection devices 10 and 11 should be closer or farther apart.
[0021]
FIG. 7 is an enlarged view of a portion where the lines perpendicular to each other constituting the lattice pattern intersect, and shows an example in which the lattice patterns 15 and 16 are shifted by an amount of 1 dot or less. As shown in FIG. 7, when the video projection positions of the video projection devices 10 and 11 are shifted by 1 dot or less, according to the video projection position adjustment method of the present embodiment, the grid patterns 15 and 16 Since the colors are different from each other, the pattern projected on the screen has a portion where both colors appear and a portion where the colors of the grid patterns 15 and 16 are displayed as they are. Therefore, such a color display makes it possible to easily recognize the deviation of the image projection position of one dot or less.
[0022]
As described above, according to this method of adjusting the video projection position, the grid patterns 15 and 16 projected from the video projection devices 10 and 11 have different colors, so that the adjustment of the video projection position is completed. It is easy to judge that the case is incomplete. In addition, the degree to which the image projection position has been adjusted can be easily known using the pitch of the lattice pattern as a guide. As described above, according to the method of adjusting the image projection position of the present embodiment, the adjustment of the image projection position can be easily performed.
[0023]
The present invention can be variously modified without being limited to the above embodiment. For example, in the present embodiment, a video projection system that displays a composite video using two video projection devices has been described. However, even when a composite video is generated using a larger number of video projection devices, the video A projection position adjustment method is applicable.
[0024]
In the present embodiment, the lattice patterns 15 and 16 have been described as different colors from each other. However, if the two colors have a complementary color relationship, the lattice patterns 15 and 16 are completely overlapped, and the image projection position can be adjusted. When the adjustment is completed, the overlapping pattern becomes colorless on the screen, so that it is easier to determine whether the adjustment of the image projection position is completed or incomplete.
[0025]
Further, in the present embodiment, an example has been described in which the projection position adjustment images 12 and 13 include a lattice pattern. However, the pattern used as the marker for adjusting the projection position is not limited to the lattice pattern, and various patterns can be applied. is there. For example, a cross marker of a different color or the like may be used for each of the projection position adjustment images 12 and 13.
[0026]
(Second Embodiment) Next, a method of adjusting a video projection position according to a second embodiment will be described. In the adjustment method of the video projection device, since only the projection position adjustment markers included in the projection position adjustment images 12 and 13 projected from the first embodiment described above and the video projection devices 10 and 11 are different, This will be described in detail.
[0027]
FIG. 8 is a diagram showing a projection position adjustment marker 22 (second marker) included in the projection position adjustment image 12 and a projection position adjustment marker 21 (first marker) included in the projection position adjustment image 13. is there. As shown in FIG. 8, in the second embodiment, the video projection device 10 adjusts the projection position including the marker 22 in the above-described overlapping portion instead of the grid pattern 15 shown in the first embodiment. An image 12 is projected. Further, the image projection device 11 projects the projection position adjustment image 13 including the marker 21 on the above-described overlapping portion, instead of the grid pattern 16 shown in the first embodiment.
[0028]
As shown in FIG. 8, the marker 22 has a one-dot-width band-like pattern extending in the vertical direction in the projection position adjustment image 13. In addition, the marker 21 has a color different from that of the band-shaped pattern forming the marker 22 (in FIG. 8, the color of the band-shaped pattern is different depending on the hatched direction of hatching). The marker 21 extends in the vertical direction in the projection position adjustment image 12 and includes a band-shaped pattern having the same 1-dot width as the band-shaped pattern forming the marker 22. The marker 21 extends in a direction perpendicular to the band-shaped pattern extending in the vertical direction, that is, in the horizontal direction, and the position of the end is stepwise separated by one dot from the end where the end comes in contact with the band-shaped pattern. And a 1-dot-wide band-like pattern. In the method of adjusting the image projection position according to the second embodiment, the vertically extending band-shaped pattern included in the marker 22 and the plurality of horizontally extending band-shaped patterns included in the marker 21 are orthogonalized. The image projection positions of the image projection devices 10 and 11 are adjusted.
[0029]
FIG. 9 shows the positional relationship between the markers 21 and 22 when the adjustment of the image projection positions of the image projection devices 10 and 11 is completed. When the adjustment of the image projection positions of the image projectors 10 and 11 is completed, the band-shaped patterns extending in the vertical direction included in each of the marker 21 and the marker 22 overlap with each other as shown in FIG. It is displayed on the screen as a band-shaped pattern extending in the vertical direction having a color.
[0030]
10 to 13 show the case where the adjustment of the image projection positions of the image projection devices 10 and 11 is incomplete, and show the case where the image projection positions are shifted by 1 to 4 dots in the horizontal direction. According to the markers 21 and 22 described above, as shown in FIGS. 10 to 13, the band-shaped pattern extending in the vertical direction of the marker 22 and the plural band-shaped patterns extending in the horizontal direction of the marker 21 overlap with each other to form a composite color. The deviation amount of the image projection position can be known in dot units by the number of intersections. That is, when the adjustment of the image projection position is completed, the plurality of band-shaped patterns extending in the horizontal direction of the marker 21 are changed from those in contact with the band-shaped pattern extending in the vertical direction included in the marker 22 to the end. Are gradually separated by one dot at a time, so that the number of intersections overlapping with the vertically extending band-shaped pattern included in the marker 22 is the number of intersections of the image projection positions of the image projection devices 10 and 11. The shift amount is indicated in dot units.
[0031]
As described above, according to the method for adjusting the image projection position according to the second embodiment, the amount of deviation between the image projection positions of the image projection devices 10 and 11 can be known in dot units. Can be known in more detail. As a result, the adjustment of the image projection position becomes easier.
[0032]
The present invention can be variously modified without being limited to the above embodiment. For example, a band-like pattern extending in the vertical direction included in the marker 21 is not always necessary. In this case, the state in which one end of the vertically extending band-shaped pattern included in the marker 22 and the plurality of horizontally-extended band-shaped patterns included in the marker 21 is in contact is a state in which the adjustment of the image projection position is completed. It can be.
[0033]
Although the markers 21 and 22 have been described as different colors from each other, in particular, if the two colors have a complementary color relationship, when the adjustment of the image projection position is completed, the vertical direction included in the markers 21 and 22 is included. Since the extending strip-shaped patterns completely overlap each other and become colorless, it can be easily understood that the adjustment of the image projection position is completed.
[0034]
【The invention's effect】
According to the present invention, among the plurality of video projectors, the one that projects an image having an overlapping portion overlapping each other projects an image including a marker of a different color in each overlapping portion. Therefore, when the markers are completely overlapped and the adjustment of the image projection position is completed, the color originally possessed by each marker disappears, and only the pattern having the combined color of both markers is displayed on the screen. Whether or not the adjustment of the projection position has been completed can be easily determined based on the displayed color. As a result, the adjustment of the image projection position becomes easy.
[0035]
In addition, among the plurality of video projection devices, one of the video projection devices that projects a video having an overlapping portion overlapping each other projects a first projection position adjustment video including a first marker including a band-shaped pattern, From the other video projection device, when the adjustment of the video projection position is completed, the color of the band-shaped pattern included in the first marker is different from the color of the band-shaped pattern included in the first marker. A second projection position adjustment image including a second marker composed of a plurality of strip-shaped patterns whose end portions are separated step by step by one dot from the contacting object is projected. Accordingly, the amount of deviation of the image projection position can be grasped in dot units by the number of intersections having a composite color where the first marker and the second marker intersect, so that the adjustment of the image projection position becomes easier. .
[Brief description of the drawings]
FIG. 1 is a flowchart of an image projection position adjusting method according to an embodiment.
FIG. 2 is a diagram illustrating a concept of adjusting a projection position in the video projection system according to the embodiment.
FIG. 3 is a diagram illustrating a grid pattern forming a marker according to the first embodiment.
FIG. 4 is a diagram showing a pattern displayed on a screen when adjustment of a video projection position is completed in the first embodiment.
FIG. 5 is a diagram showing a pattern displayed on a screen when a video projection position is separated by a half pitch of a lattice in the first embodiment.
FIG. 6 is a diagram showing a pattern displayed on a screen when a video projection position is too close to a half pitch of a grid in the first embodiment.
FIG. 7 is an enlarged view of a grid intersection when the video projection position is shifted by an amount of 1 dot or less in the first embodiment.
FIG. 8 is a diagram showing a marker according to a second embodiment.
FIG. 9 is a diagram showing a pattern projected on a screen when adjustment of a video projection position is completed in the second embodiment.
FIG. 10 is a diagram showing a pattern projected on a screen when a video projection position is shifted by one dot in the second embodiment.
FIG. 11 is a diagram showing a pattern projected on a screen when a video projection position is shifted by 2 dots in the second embodiment.
FIG. 12 is a diagram showing a pattern projected on a screen when a video projection position is shifted by 3 dots in the second embodiment.
FIG. 13 is a diagram showing a pattern projected on a screen when a video projection position is shifted by 4 dots in the second embodiment.
FIG. 14 is a diagram for explaining the concept of a method of adjusting a video projection position in a conventional video projection system.
FIG. 15 is a diagram showing a pattern projected on a screen when a video projection position is separated by a half pitch of a grid in a conventional video projection system.
FIG. 16 is a diagram showing a pattern projected on a screen when a video projection position is too close to a half pitch of a grid in a conventional video projection system.
FIG. 17 is an enlarged view showing an intersection in a case where grid patterns completely overlap in the conventional video projection system.
FIG. 18 is an enlarged view showing an intersection of a grid pattern when the grid pattern is shifted by a unit of 1 dot or less in a conventional video projection system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Video projection system, 10, 11 ... Video projection apparatus, 12, 13 ... Projection position adjustment video, 15, 16 ... Lattice pattern

Claims (5)

In a video projection system that displays a composite video on a screen by a video projected from each of a plurality of video projection devices, a method of adjusting a video projection position of each of the plurality of video projection devices,
Of the plurality of video projection devices, the plurality of video projection devices that project video having overlapping portions overlapping each other are different colors, and markers that overlap each other when the adjustment of the video projection position is completed, Projecting a projection position adjustment image included in each of the overlapping portions,
By the plurality of video projection devices that project video having the overlapping portion overlapping each other, the markers respectively projected, until only the composite color generated by overlapping each other is displayed on the screen, Adjusting an image projection position by the image projection device. The adjustment method according to claim 1, wherein the markers included in the projection position adjustment images projected from the plurality of image projection devices are lattice patterns. In a video projection system that displays a composite video on a screen by a video projected from each of a plurality of video projection devices, a method of adjusting a video projection position of each of the plurality of video projection devices,
One of the plurality of video projection devices that projects a video having an overlapping portion that overlaps with each other, wherein the video projection device includes a first projection position adjustment video including a first marker including a band-shaped pattern in the overlapping portion. When the other image projection device has a different color from the band-shaped pattern constituting the first marker on the overlapping portion, and the adjustment of the image projection position is completed, Projecting a second projection position adjustment image including a second marker composed of a plurality of band-shaped patterns whose end positions are separated by one dot step by step from those whose end portions are in contact with the band-shaped pattern constituting the marker. A projection step;
The strip-shaped pattern forming the first marker, while the strip-shaped pattern forming the first marker and the plurality of strip-shaped patterns forming the second marker are orthogonal to each other; The image projection positions of the one image projection device and the other image projection device are determined based on the number of intersections having a composite color generated by overlapping the plurality of band-shaped patterns constituting the two markers. Adjusting an image projection position. The second marker extends in a direction perpendicular to the plurality of band-shaped patterns, has a band-shaped pattern having the same width as the band-shaped pattern constituting the first marker, and the plurality of band-shaped patterns are 4. The image projection position adjustment according to claim 3, wherein the position of the end portion is gradually shifted by one dot from the end portion in contact with the strip-shaped pattern extending in the vertical direction. Method. The markers projected from each of the plurality of video projectors that project video having overlapping portions among the plurality of video projectors have complementary colors to each other. 3. The method for adjusting a video projection position according to item 1.

Images