CN100498893C - Projection image position adjustment method - Google Patents

Abstract

How to adjust the position of the projected image. Position adjustment of projection images from a plurality of projectors projected on the projection plane can be performed quickly and with a small amount of computation. A multi-projection display capable of projecting projection images from a plurality of projectors on a projection surface with overlapping areas, comprising: an adjustment image data output device (12), capable of outputting two adjustment images to two projectors , the two adjustment images have the following figure: when the two adjustment images projected from the two projectors (PJ1, PJ2) of the plurality of projectors are projected with an appropriate positional relationship, in the overlapping area Predetermined features appear; evaluation value calculation means (13) calculates a value associated with the features based on captured image data obtained by photographing the projection plane when the two adjustment images are projected from the two projectors. An evaluation value: a position adjustment control device (14), configured to adjust the positions of the two projected images according to the evaluation value.

Description

Position adjustment method of projected image

technical field

The present invention relates to a method for adjusting the position of projected images, a device for adjusting the position of projected images, a program for adjusting the position of projected images, and multiple Projection display.

Background technique

A multi-projection display is known in which projected images from a plurality of projectors are projected in a tiled manner or overlapped on a projection surface. In such a multi-projection display, the accuracy of positional adjustment of each projected image on a projection surface greatly affects the quality of projected images.

For example, in the case of tiled projection, if the accuracy of position adjustment is low, discontinuous joints may occur between projected images, overlapping areas may appear blurred, and the quality of projected images may deteriorate significantly.

In order to deal with this problem, in a multi-projection display, it is necessary to perform position adjustment between each projected image, but when the user manually performs this position adjustment, it takes a lot of work and time, and requires a skillful technique for position adjustment. The problem.

For this reason, various techniques for automating position adjustment have conventionally been proposed (for example, refer to Patent Document 1 and Patent Document 2).

The technique disclosed in Patent Document 1 uses a camera to capture a plurality of test pattern images (with a luminance distribution of mountain-shaped waveforms) projected on a projection surface, and obtains representative positions of the plurality of test patterns (centers of mountain-shaped waveforms) based on the captured image data. position), according to each representative position obtained, obtain the interval of each test pattern image, and the interval between the horizontal direction and the vertical direction of both or one side of the connecting line of each test pattern image and the intersection position of the adjacent picture, use These intervals determine what kind of positional offset exists.

In addition, the technique disclosed in Patent Document 2 uses two projectors to display two adjustment figures having a black display portion along the boundary of adjacent projected images, and displaying dark lines in overlapping portions. It has two figures of white display part inside. Then, the width of the black display portion is gradually reduced, and the camera is used to capture images, and the change in the width of the dark lines is observed based on the captured image data, and the disappearance positions of the dark lines are stored as boundary positions. Then, position adjustment is performed so that the contours of the projection images projected from the respective projection devices at the boundary positions match.

[Patent Document 1] Japanese Patent Laid-Open No. 2001-356005

[Patent Document 2] Japanese Patent Laid-Open No. 2002-365718

The technique disclosed in Patent Document 1 considers that a positional shift can be detected using an imaging device having a resolution lower than that of a projected image. However, complex image analysis processing is required to obtain the positional shift. Therefore, an image data processing device with high processing capability is required, and there is a problem that rapid positional offset adjustment cannot be performed due to a large amount of computation.

In addition, the technique disclosed in Patent Document 2 has a problem that the boundary position cannot be obtained with high accuracy unless a high-resolution imaging device having a resolution of a pixel unit of a projected image is used.

Contents of the invention

An object of the present invention is to provide a method for adjusting the position of a projected image, a device for adjusting the position of a projected image, a program for adjusting the position of a projected image, and a multi-projection display capable of rapidly and accurately projecting a projected image onto a projection surface with a small amount of computation. Position adjustment of projected images from multiple projectors.

(1) The method for adjusting the position of a projected image according to the present invention uses two images for adjustment to adjust the position projected on the projection surface from two projectors in a multi-projection display having a plurality of projectors so as to have an overlapping area. The position of the two projected images is characterized in that the method for adjusting the position of the projected image comprises: a first step of providing the two projectors with two image data for adjustment corresponding to the two images for adjustment, when When the two adjustment images are projected in a proper positional relationship, a predetermined feature appears in the overlapping area; in the second step, according to the two adjustment images projected from the two projectors, The camera image data obtained by shooting the projection surface, and calculating the evaluation value associated with the feature; and the third step, adjusting the position of the two projection images according to the evaluation value; wherein, the two adjustments are One of the images for adjustment has a first figure based on a first color, and the other image for adjustment has a second figure based on a second color, and the red component, green component and The value of the blue component makes the first color and the second color appear white when the first graphic and the second graphic overlap.

In this way, two projectors are used to project on the projection surface an image for adjustment in which a predetermined feature appears in an overlapping region when projected in an appropriate positional relationship, and the calculated and The position is set based on the evaluation value associated with the feature, so that the position adjustment of the projected image can be performed quickly and accurately with a small amount of computation.

In addition, regarding the two adjustment images, the adjustment images may be generated as two adjustment images, and the generated two adjustment images may be provided to two projectors, but one adjustment image may be generated as the adjustment image. Using the image, the one image for adjustment is divided and provided to two projectors.

In addition, by setting the value of each color component of R (red), G (green), and B (blue), the respective graphics of the two adjustment images appear white in the overlapping area of the two, so that Makes two adjustment images appear white when properly overlapped.

(2) In the method for adjusting the position of a projected image described in (1), preferably in the second step, at least one of the two adjustment images is arranged horizontally or horizontally in units of 1 pixel. For vertical movement, the evaluation value is calculated every time the adjustment image is moved by 1 pixel unit.

In this way, an evaluation value can be calculated for each pixel unit of the image for adjustment, and position adjustment with an accuracy of one pixel unit can be realized.

(3) In the method for adjusting the position of a projected image described in (1) or (2), it is preferable that the graphic has a line having a width corresponding to 1 pixel.

In this way, by making the graphics of the two adjustment images a line having a width of 1 pixel, it is possible to observe a feature that appears due to overlapping of graphics every time the adjustment images are shifted by 1 pixel. This makes it possible to accurately calculate evaluation values based on 1-pixel units, and realize positional adjustment with an accuracy of 1-pixel unit.

(4) In the projection image position adjustment method described in (1) or (2) above, it is preferable that the feature is a pixel value in the captured image data.

Thus, by expressing features using pixel values, features can be expressed as objective values.

(5) In the position adjustment method of the projected image described in (4) above, preferably the evaluation value is the number of pixels whose pixel value is greater than or equal to the threshold value, and in the third step, set the pixel value greater than or equal to the threshold value The position where the number of pixels is the largest is used as the optimal projection position of the two projection images, and the position adjustment of the two projection images is performed.

In this way, the evaluation value is represented by the number of pixels equal to or greater than the threshold, and the optimal projection position can be easily and appropriately determined by simply counting the number of pixels. In other words, the greater the degree of overlapping of the two adjustment images, the greater the number of pixels equal to or greater than the threshold, so that the optimal projection position can be easily and appropriately determined.

(6) In the method for adjusting the position of a projected image described in (5) above, it is preferable that the threshold is set to a value corresponding to a color that appears when each figure in the two adjustment images overlaps.

As a result, each pattern of the two adjustment images is superimposed to appear in a color different from that of each adjustment image, so that the position adjustment status can be known at a glance based on the degree of color change.

(7) In the method for adjusting the position of a projected image described in (1), preferably, the first color is a color having a relatively strong red component and a relatively weak green component, and the second color is a color having a relatively strong green component. The color of the blue component and the relatively weak green component.

This means, for example, that in one image for adjustment, the pixel values (gradation values) of each color component are set to R=255, G=128, and B=0, and in the other image for adjustment, the values of each color component are set to The pixel value (gray value) is set as R=0, G=128, B=255, so that by overlapping the two, the pixel value (gray value) of each color component can appear as R=255, G=255, B =255 white. In addition, the luminance characteristics of captured image data may vary due to the gamma characteristics of a projector or imaging device, lighting conditions, etc., and thus the pixel value of G (green) may vary due to lighting conditions and the like.

(8) In the method for adjusting the position of the projected image described in any one of (1)-(2) and (5)-(7), preferably in the second step, the two adjustment The evaluation value is calculated by taking a plurality of photographs with the images in the same positional relationship.

In this way, by calculating an evaluation value using captured image data obtained by capturing multiple times, it is possible to obtain a highly accurate evaluation value that reduces the influence of noise of the imaging device. For example, an average value of evaluation values calculated using captured image data obtained by capturing multiple times is obtained, and this average value is used as an evaluation value to be obtained.

(9) In the position adjustment method of any one of the aforementioned (1)-(2), (5)-(7), preferably in the third step, any of the two projectors The position of the effective image display area of the image forming area of the photoelectric modulation device of one projector is moved in units of pixels to adjust the positions of the two projected images.

In this way, the projected image can be shifted in units of pixels by utilizing the inherent functions of the projector.

(10) The device for adjusting the position of a projected image according to the present invention adjusts the image projected on the projection surface from two projectors in a multi-projection display having a plurality of projectors so as to have overlapping regions using two images for adjustment. The position of two projected images is characterized in that the device for adjusting the position of projected images has: an image data output device for adjustment, which outputs two adjustment images corresponding to the two images for adjustment to the two projectors. Using image data, when the two adjustment images are projected in an appropriate positional relationship, a predetermined feature appears in the overlapping area; an imaging device that can photograph the two adjustment images projected on the projection surface. an image; an evaluation value calculation device that calculates the characteristic based on captured image data obtained by capturing the projection plane when the two adjustment images are projected from the two projectors by the imaging device; an associated evaluation value; and position adjustment control means for performing position adjustment of the two projection images based on the evaluation value; wherein one of the two adjustment images has a first color based on a first color. 1 graphic, another image for adjustment has a second graphic based on a second color, and the values of the red component, green component, and blue component in the two adjustment images are respectively set so that the first color and the second color The 2 colors appear white when the first and second figures overlap.

In this projection image position adjustment device, the same effect as that of the projection image position adjustment method described in (1) can be obtained. In addition, it is preferable that the projection image position adjustment device has the same features as the above-mentioned projection image position adjustment methods (2) to (9).

(11) The multi-projection display of the present invention has a plurality of projectors, and can project projection images from the plurality of projectors on a projection surface so as to have overlapping regions, and is characterized in that it has image data for adjustment an output device that outputs two image data for adjustment corresponding to two images for adjustment to the two projectors, when the two images for adjustment projected by the two projectors among the plurality of projectors are When an appropriate positional relationship is projected, a predetermined feature appears in the overlapping area; evaluation value calculation means obtained by photographing the projection plane when the two adjustment images are projected from the two projectors of the captured image data, calculating an evaluation value associated with the feature; and a position adjustment control device, which performs position adjustment of the two projection images according to the evaluation value; wherein one of the two adjustment images The image for adjustment has a first figure based on a first color, and the other image for adjustment has a second figure based on a second color, and the values of red components, green components, and blue components in the two adjustment images are respectively set. value, so that the first color and the second color appear white when the first graphic and the second graphic overlap.

A multi-projection display having a plurality of projectors has a configuration for such position adjustment, whereby the position adjustment of the projection images projected from each projector can be quickly and accurately performed with a small amount of computation. In addition, in this multi-projection display, it is preferable to have the same features as those of the position adjustment method of the projection image in (2) to (9) above.

(12) In the multi-projection display described in (11) above, it is preferable that the multi-projection display is configured such that a plurality of projected images from the plurality of projectors can be projected in a tiling manner with overlapping regions. on the projection surface.

In this way, even in a multi-projection display that performs tiled projection with overlapping regions between projected images projected from a plurality of projectors, it is possible to rapidly and accurately perform projection with a small amount of computation. Position adjustment of projected images projected from each projector.

(13) In the multi-projection display described in (11) above, it is preferable that the multi-projection display is configured such that a plurality of projected images from the plurality of projectors can be stacked and projected on the projector in such a manner that there is an overlapping area. face.

In this way, even in a multi-projection display that performs so-called stack projection in which projection images projected from multiple projectors are stacked and projected in the same projection area, projection from each projector can be quickly and accurately performed with a small amount of calculation. Image repositioning.

Description of drawings

FIG. 1 is a diagram showing the configuration of a multi-projection display to which the method for adjusting the position of a projected image according to Embodiment 1 is applied.

FIG. 2 is a diagram specifically showing the configuration of the position adjustment device 1 for projecting images.

FIG. 3 is a schematic diagram showing an example of adjustment images CG1 and CG2 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction.

FIG. 4 is a schematic diagram showing a state in which the adjustment images CG1 and CG2 shown in FIG. 3 are projected on the screen SCR with a partially overlapping region.

FIG. 5 is a diagram showing an enlarged display of overlapping regions of the adjustment images CG1 and CG2 in the captured image data from the imaging device 11 at each position of the adjustment image CG2 .

6 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "20" shifted by 20 pixels.

7 is a flowchart schematically showing a procedure for controlling the position of a projected image in the method for adjusting the position of a projected image according to the first embodiment.

8 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "40" shifted by 40 pixels.

FIG. 9 is a schematic diagram showing an example of adjustment images CG3 and CG4 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction.

FIG. 10 is a schematic diagram showing a state in which the adjustment images CG3 and CG4 shown in FIG. 9 are projected on the screen SCR with a partial overlapping area.

11 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "20" shifted by 20 pixels in the adjustment images CG3 and CG4 shown in FIG. 10 .

FIG. 12 is a schematic diagram showing an example of adjustment images CG3 and CG4 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the vertical direction.

FIG. 13 is a schematic diagram showing a state in which the adjustment images CG3 and CG4 shown in FIG. 12 are projected on the screen SCR with a partial overlapping region.

FIG. 14 is a schematic diagram showing a state in which adjustment images CG1 and CG2 are projected on the screen SCR from two projectors PJ1 and PJ2 aligned in the vertical direction with a partly overlapping area.

FIG. 15 is a diagram showing a multi-projection display including 4 x 4 projectors, a total of 16 projectors.

FIG. 16 is a diagram showing a modified example (No. 1) of a graphic of an adjustment image.

Fig. 17 is a diagram showing a modified example (No. 2) of the graphics of the adjustment image.

FIG. 18 is a diagram showing a modified example (third) of a graphic of an adjustment image.

Symbol Description

1 Position adjustment device for projected image; 11 Camera device; 12 Adjustment image data output device; 13 Evaluation value calculation device; 14 Position adjustment control device; CG1, CG2, CG3, CG4 adjustment image; PJ1, PJ2 projector; Screen.

Detailed ways

Embodiments of the present invention will be described below.

(Embodiment 1)

FIG. 1 is a diagram showing the configuration of a multi-projection display to which the method for adjusting the position of a projected image according to Embodiment 1 is applied. In order to make the description easier to understand, it is assumed that the multi-projection display shown in FIG. 1 has two left and right projectors PJ1 and PJ2 arranged in parallel in the horizontal direction. Tiles the projections so that parts of the respective projected images have overlapping regions. In addition, FIG. 1 is a figure which viewed screen SCR and projectors PJ1 and PJ2 from above.

The multi-projection display shown in FIG. 1 has: two projectors PJ1, PJ2;

In addition, the projectors PJ1 and PJ2 can move the display position of the projected image on the screen SCR in the horizontal/vertical direction in units of one pixel within the screen SCR by an external operation. And, when the display position of the image cannot be moved by external operation, for example, by providing the image data output device (personal computer, etc.) / Vertical movement function to deal with it.

The device 1 for adjusting the position of a projected image includes: an imaging device 11 capable of photographing adjustment images CG1 and CG2 projected on a screen SCR in a tiled manner with a part of an overlapping region; and an adjustment image data output device 12 capable of sending Projectors PJ1, PJ2 output adjustment image data CGD1, CGD2 corresponding to two adjustment images CG1, CG2; evaluation value calculation means 13, which calculates an evaluation value for the adjustment image based on the captured image data from imaging device 11 and a position adjustment control device 14, which obtains the optimum projection position of the projection image from the projectors PJ1, PJ2 according to the evaluation result of the evaluation value calculation device 13, and adjusts the position of the projection image according to the obtained position.

In addition, in the method for adjusting the position of a projected image according to Embodiment 1, one of the two adjustment images CG1 and CG2 (set as the adjustment image CG1 projected by the projector PJ1 ) is fixed, and the other is adjusted. An optimal projection position is detected by moving the image (adjustment image CG2 projected by projector PJ2 ) in the vertical direction (vertical direction) on the screen SCR.

FIG. 2 is a diagram specifically showing the configuration of the position adjustment device 1 for projecting images. The adjustment image data output device 12 has an adjustment image data generation unit 121 that generates adjustment image data CGD1 and CGD2 for the projectors PJ1 and PJ2, and an adjustment image data output unit 122 that converts the generated adjustment image data to the projectors PJ1 and PJ2. The image data CGD1, CGD2 are output to the corresponding projectors PJ1, PJ2.

The imaging device 11 captures adjustment images CG1 and CG2 corresponding to the adjustment image data CGD1 and CGD2 from the projectors PJ1 and PJ2 projected on the screen SCR, and outputs the captured image data. In addition, as the imaging device 11, an imaging device having a resolution lower than that of a projected image projected on the screen SCR may be used.

The evaluation value calculation device 13 has: a captured image data input unit 131 that inputs captured image data obtained by capturing the adjustment images CG1 and CG2 on the screen SCR by the imaging device 11; and a captured image data storage unit 132 that stores the inputted image data. the captured image data; the evaluation value calculation unit 133, which calculates the evaluation value based on the positional relationship between the adjustment images CG1 and CG2 (details will be described later); and the position/evaluation value storage unit 134, which calculates The moved position of CG2 is stored in association with the calculated evaluation value.

The position adjustment control device 14 has: a projected image position control unit 141, which can control the projected image position of the projectors PJ1, PJ2 to move in units of 1 pixel; a position/evaluation value acquisition unit 143, whose input is stored in the evaluation value calculation device The position in the position/evaluation value storage unit 134 of 13 and the evaluation value of the position, obtain the maximum evaluation value and its position (referred to as the maximum evaluation position) among the evaluation values, and set the maximum value corresponding to the obtained maximum evaluation value to The evaluation position is stored in the maximum evaluation position storage unit 142; and the control unit 144 provides the projected image position control unit 141 with the maximum evaluation value acquired by the position/evaluation value acquisition unit 143 and the maximum evaluation position at this time Mobile control information.

FIG. 3 is a schematic diagram showing an example of adjustment images CG1 and CG2 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction. FIG. 3( a ) shows the image CG1 for adjustment, and FIG. 3( b ) shows the image CG2 for adjustment. The adjustment images CG1 and CG2 shown in FIG. 3 are adjustment images for adjusting the vertical positions of the projected images from the projectors PJ1 and PJ2 on the screen SCR.

In addition, as described above, the adjustment images CG1 and CG2 may be generated as adjustment images respectively corresponding to the two projectors PJ1 and PJ2, and the generated two adjustment images may be provided to the corresponding projector PJ1. , PJ2, but one adjustment image may be generated as an adjustment image, and the one adjustment image may be divided and supplied to corresponding projectors PJ1 and PJ2 respectively. The same applies to the image for adjustment used in the method of adjusting the position of a projected image according to each embodiment described below.

When the adjustment images CG1 and CG2 are projected on the screen SCR with an appropriate positional relationship, the adjustment images CG1 and CG2 have a figure in which a predetermined characteristic appears in the overlapping region.

That is, of the two adjustment images CG1 and CG2, one adjustment image CG1 has a first figure based on a first color, and the other adjustment image CG2 has a second figure based on a second color, and the two adjustments are set. Using the pixel values of the red component, green component, and blue component of the image, the first color and the second color appear as characteristic white when the first pattern and the second pattern overlap.

For example, it is assumed that the first color of the adjustment image CG1 is a color having a relatively strong red component and a relatively weak green component, and the second color of the adjustment image CG2 is a color having a relatively strong blue component and a relatively weak green component. The color of the weaker green component. Specifically, for the first color of the adjustment image CG1, the pixel values (grayscale values) of R (red), G (green), and B (blue) components are set to R=255, G=160, B =0, for the second color of the adjustment image CG2, the pixel values (grayscale values) of the R (red), G (green), and B (blue) components are set as R=0, G=160, and B =255. In addition, it is preferable that the background color is black. Also, the pixel value used in each embodiment of the present invention represents a luminance value.

In addition, in order to make the pixel values of the overlapping regions of the adjustment images CG1 and CG2 white (R=255, G=255, B=255), ideally, the G (green) components of the adjustment images CG1 and CG2 should be 128, but in fact, due to the influence of the gamma characteristics of the projectors PJ1, PJ2 or the imaging device or lighting conditions, etc., the luminance characteristics of the captured image data may change. Therefore, in Embodiment 1, G (green)=160 is set. In this way, the value of G (green) can be appropriately set to the most suitable value for the conditions and the like at the time.

Also, in the above example, the pixel values of R and B are fixed to 255 or 0, respectively, and G is variably set to an optimum value, but it is also possible to fix the pixel values of G and B to 255 or 0, respectively. 0, set R variably as the optimum value, and also fix the pixel values of R and G to 255 or 0 respectively, and set B variably as the optimum value. However, since an imaging device generally has a high sensitivity to G (green), it is preferable to variably set G (green) to an optimum value.

In addition, the graphics (first graphics and second graphics) of the adjustment images CG1 and CG2 are line graphics composed of a plurality of straight lines in the horizontal direction. And, the width (thickness) of each line corresponds to one pixel of the photoelectric modulation device (called liquid crystal modulation device) of projectors PJ1, PJ2 as shown in the enlarged view of the dotted line frame in FIG. 3, and the interval of each line corresponds to 20 pixels for the liquid crystal modulation device of the projectors PJ1 and PJ2.

Next, a method of adjusting the position of a projected image according to Embodiment 1 will be described. Here, the resolution of each liquid crystal modulation device of projectors PJ1 and PJ2 is horizontal 1280 pixels×vertical 720 pixels, and the resolution of the imaging device is horizontal 1280 pixels×vertical 1024 pixels.

First, the user manually adjusts the positions of the two adjustment images CG1 and CG2 within a possible range. In addition, the position set by the user's manual position adjustment is called an initial position.

Then, by applying the method for adjusting the position of a projected image according to the first embodiment, the final fine adjustment is performed from the initial position to determine the optimum projection position. Hereinafter, the projection image position adjustment procedure of the projection image position adjustment method according to Embodiment 1 of the present invention will be described.

First, the adjustment image data output device 12 outputs the adjustment image data CGD1 to the projector PJ1 that projects the left projection image of the screen SCR, and outputs the adjustment image data CGD2 to the projector PJ2 that projects the right projection image. Among these adjustment image data CGD1 and CGD2, the adjustment image data CGD1 has pixel values of R=255, G=160, and B=0, and the adjustment image data CGD2 has pixel values of R=0, G=160, and B=255. value.

FIG. 4 is a schematic diagram showing a state in which the adjustment images CG1 and CG2 shown in FIG. 3 are projected on the screen SCR with a partially overlapping region. As shown in FIG. 4 , the adjustment image CG1 of the projector PJ1 and the adjustment image CG2 of the projector PJ2 are projected on the screen SCR with a part of overlapping area, wherein the adjustment image CG1 has R=255, G=160, B= With a pixel value of 0, the image data for adjustment CGD2 has pixel values of R=0, G=160, and B=255. In addition, the image CG1 for adjustment and the image CG2 for adjustment in FIG. 4 are the state before performing position adjustment.

After the adjustment images CG1 , CG2 are projected on the screen SCR, any one of the adjustment images CG1 , CG2 is shifted in the vertical direction by 1-pixel unit. As described above, in Embodiment 1, the adjustment image CG1 is fixed, and the position of the adjustment image CG2 is moved in units of one pixel. In addition, by using a function that can move the position of the effective image display area of the image forming area of the liquid crystal modulation device of projector PJ2 in units of pixels, the adjustment image CG2 can be easily moved in units of pixels.

The adjustment image CG2 projected by the projector PJ2 is placed at a position moved 10 pixels in the vertical direction (set up) from the initial position set by the manual position adjustment (set as the processing start position) . Then, an operation of sequentially moving the adjustment image CG2 by 20 pixels in units of one pixel in the downward direction from the processing start position is performed.

In addition, as described above, the position where the adjustment image CG2 projected by the projector PJ2 is shifted by 10 pixels in the vertical direction from the initial position set by manual operation is taken as the processing start position, and the processing is performed from the processing start position. The movement of 20 pixels is due to the initial position set by manual operation. Although manual operation has a certain degree of accuracy, there is an optimal projection position within a range of about 10 pixels in the vertical direction based on the initial position. high probability. By performing such an operation, the optimal projection position can be found more efficiently.

FIG. 5 is a diagram showing an enlarged display of overlapping regions of the adjustment images CG1 and CG2 in the captured image data from the imaging device 11 at each position of the adjustment image CG2 . Each image shown in FIG. 5 shows the states of the adjustment images CG1 , CG2 at the respective positions after the adjustment image CG2 is sequentially moved downward by 20 pixels from the processing start position in units of 1 pixel. In FIG. 5, the numerical values "1" to "20" attached to the lower left of each image are serial numbers indicating each position when the adjustment image CG2 is moved by 20 pixels from the processing start position, and position "1" is the processing start position. start position.

On the other hand, the imaging device 11 captures the adjustment images CG1 and CG2 on the screen SCR along with the movement of the adjustment image CG2 in units of one pixel, and outputs the captured image data. The captured image data is input to the captured image data input unit 131 and stored in the captured image data storage unit 132 . Then, the evaluation value calculation unit 133 calculates an evaluation value for each position of one pixel unit of the adjustment image CG2 using the captured image data stored in the captured image data storage unit 132 . The calculation of the evaluation value is performed as follows.

As shown in FIG. 5 , the adjustment image CG2 is moved in units of one pixel, and when the adjustment images CG1 and CG2 have a predetermined positional relationship, the original adjustment image CG1 appears in the overlapping area of the adjustment images CG1 and CG2. , A feature that does not exist in CG2. Here, the feature appearing in the overlapping area of the adjustment images CG1, CG2 refers to the change in the pixel value of the captured image data caused by the overlapping of the lines of the adjustment images CG1, CG2. overlap, white appears in the overlapping area.

In addition, since FIG. 5 is a monochrome drawing, it is difficult to read the appearance of white from FIG. 5 , but it is actually easy to read the appearance of white on the color image that is the prototype of FIG. 5 . In this case, in the overlapping region of the adjustment image CG1 and the adjustment image CG2, pink is used to represent white with a pixel value reaching a predetermined threshold value (threshold value will be described later), so that it is easier to read the color image on the display. Take the white ones that appear.

Although not easy to read from Figure 5, an area that is white begins at position "6" and reaches a maximum at position "8" and then as positions change to "9", "10", ..., the white area decreases sharply, and this situation can be read from FIG. 6 described later.

In FIG. 5 , it can be determined that the adjustment images CG1 and CG2 are in an appropriate positional relationship at position "8". The determination that the adjustment images CG1 and CG2 are in an appropriate positional relationship can be performed based on the number of pixels that have become white from the captured image data.

In this case, it may be determined whether or not the pixel is white based on whether or not the pixel value of each pixel is greater than or equal to a predetermined value. That is, the ideal state is to set the pixel value as white when R, G, B=(255, 255, 255), but in each embodiment of the present invention, the pixel value as the threshold is set to, for example, R, G , B=(240, 240, 240), determine that the pixel value greater than or equal to R, G, B=(240, 240, 240) is white.

Here, the threshold is set to R, G, B = (240, 240, 240) instead of R, G, B = (255, 255, 255), because it takes into account device characteristics such as gamma characteristics or lighting conditions changes, and set a certain margin.

6 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "20" shifted by 20 pixels. As shown in FIG. 6 , the number of pixels judged to be white is the largest at position "8". In addition, the number of pixels corresponding to each position shown in FIG. 6 is calculated by the evaluation value calculation unit 133 in FIG. in the location/evaluation value storage unit 134 of the

And, the position/evaluation value acquisition unit 143 of the position adjustment control device 14 in FIG. As for the evaluation position, the obtained maximum evaluation position is stored in the maximum evaluation position storage unit 142 . In this case, the position “8” is the maximum evaluation position having the largest number of pixels, so the position “8” is stored in the maximum evaluation position storage unit 142 as the maximum evaluation position.

That is, FIG. 6 shows that when the adjustment image CG2 is set to the position "8", each line of the adjustment image CG1 and each line of the adjustment image CG2 overlap in the vertical direction with the optimal projection positional relationship. Projection is performed by projectors PJ1 and PJ2 under this positional relationship, and each projected image is projected at an optimal projection position in the vertical direction.

Therefore, position adjustment is performed so that this maximum evaluation position is the projection position of the projection image of projector PJ2. Accordingly, each projected image of the projectors PJ1 and PJ2 is at an optimal projection position properly adjusted in the vertical direction, and a high-quality image without discontinuous joints or blurring in the overlapping area can be displayed.

Furthermore, the resolution of the imaging device 11 used in the method for adjusting the position of a projection image according to Embodiment 1 is 1280 pixels horizontally × 1024 pixels vertically, and even an imaging device with a relatively low resolution of about 1 million pixels can be 1 pixel unit to adjust the position of the projected image with a higher resolution (here, the resolution of one projector is set to horizontal 1280×vertical 720).

FIG. 7 is a flowchart schematically showing a procedure for adjusting the position of a projected image in the method for adjusting the position of a projected image according to Embodiment 1. FIG. Since the processing of each step in FIG. 7 has been described, the overall processing flow is briefly described here.

First, adjustment images CG1, CG2 are projected on screen SCR by projectors PJ1, PJ2 (step S1). Then, the user manually adjusts the positions of the adjustment images CG1 and CG2 projected by the projectors PJ1 and PJ2 within a possible range, and then sets one of the adjustment images CG1 and CG2 (referred to as the adjustment image CG2) The position of is set as the processing start position "1" (step S2), and in this state, the adjustment images CG1 and CG2 on the screen SCR are captured by the imaging device 11 (step S3).

Then, an evaluation value (the number of pixels) is calculated from the captured image data obtained by imaging (step S4 ), and the calculated evaluation value is associated with the current position and stored (step S5 ).

And, the position is incremented (step S6), and whether the position after judging increment has exceeded the maximum movement position ("20" in Embodiment 1) (step S7), if not exceeding the maximum movement position, then returns to step S3, Step S3 and the processing after step S3 are performed. On the other hand, when the maximum moving position is exceeded, the position and the evaluation value are obtained from the recording content recorded in step S5 (step S8), and the position having the maximum evaluation value (number of pixels) is used as the maximum evaluation position, and stored in the maximum evaluation position storage unit 142 (step S9).

Then, the control unit 144 adjusts the position of the projector PJ2 so that the maximum evaluation position becomes the projection position of the projected image of the projector PJ2. Thereby, each projected image of projectors PJ1 and PJ2 has an optimal positional relationship in the vertical direction.

In addition, in the projection image position adjustment method according to Embodiment 1 described above, the adjustment image CG1 is fixed among the adjustment images CG1 and CG2, and the adjustment image CG2 is moved to determine the position of the adjustment image CG2. Of course, it is also possible to do the opposite, to fix the adjustment image CG2 and move the adjustment image CG1 .

In addition, in the above-mentioned example, the adjustment image (the adjustment image CG2 in Embodiment 1) that performs the position adjustment is moved by 20 pixels from the processing start position to set the optimum projection position, but it may be As described in the modified example of the first embodiment described below, the adjustment image CG2 is shifted by arbitrary pixels from the processing start position to set the optimum projection position.

(Modification of Embodiment 1)

8 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "40" shifted by 40 pixels. In this case, the user adjusts the positions of the two adjustment images CG1 and CG2 within a possible range by manual operation, sets an initial position, and sets the position moved upward by 20 pixels from the initial position as the start position of the process. An operation to find the best projection position from the start position of this process.

As shown in FIG. 8 , the adjustment image CG2 is moved by 40 pixels from the processing start position "1", so that each line of the adjustment image CG1 and the adjustment image CG2 overlaps at least twice, so it is determined to be white. The peak in pixel count occurs twice. In the example of FIG. 8 , a peak in the number of pixels determined to be white appears at a position "11" and a position "31" which is 20 pixels away from the position "11".

In this way, when a plurality of peaks of the number of pixels appear, basically, the position having the largest evaluation value (the number of pixels) among them is taken as the maximum evaluation position. In addition, when the evaluation values of a plurality of peaks are equal, the optimal projection position is detected by, for example, the method shown below. An example thereof will be described using FIG. 8 as an example.

In Figure 8, if the initial position is set to position "10", then in Figure 8, the first peak appears at position "11", and the second peak appears at position "31", so set the position closer to the initial position "11" is set as the best position.

In this way, when the evaluation values of a plurality of peaks are equal, the peak appearing at a position closer to the initial position can be adopted as the optimum position. This is because, as described above, the initial position set by manual operation has a certain degree of accuracy, so it is considered appropriate to use a position close to the initial position as the optimum projection position.

(Embodiment 2)

In the projected image position adjustment method according to the first embodiment, the case where the position adjustment in the vertical direction (vertical direction) of the projected images from the two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction is performed is described. In the method for adjusting the position of a projected image according to the second aspect, the position adjustment in the horizontal direction (left-right direction) of each projected image from two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction will be described.

FIG. 9 is a schematic diagram showing an example of adjustment images CG3 and CG4 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the horizontal direction. As the adjustment images at this time, the adjustment images CG3 and CG4 shown in FIGS. 9( a ) and ( b ) are used.

The adjustment image data CGD3 , CGD4 corresponding to the adjustment images CG3 , CG4 are generated by the adjustment image data generation unit 121 shown in FIG. 2 . Then, the adjustment image data CGD3 and CGD4 generated by the adjustment image data generation unit 121 are supplied to the respective projectors PJ1 and PJ2 through the adjustment image data output unit 122, thereby projecting the adjustment image data shown in FIG. 9 on the screen SCR. Images CG3, CG4.

These adjustment images CG3, CG4 are also the same as the aforementioned adjustment images CG1, CG2, and have a pattern such that when the respective adjustment images CG3, CG4 are projected on the screen SCR with an appropriate positional relationship, the overlapping area Prescribed features appear. The adjustment images CG3 and CG4 have figures composed of vertical lines. In addition, the thickness (width) of the lines, the interval between the lines, and the like are the same as those of the adjustment images CG1 and CG2 (see the dashed-line frame in FIG. 9 ).

FIG. 10 is a schematic diagram showing a state in which the adjustment images CG3 and CG4 shown in FIG. 9 are projected on the screen SCR with a partial overlapping area. As shown in FIG. 10 , the adjustment image CG3 of the projector PJ1 and the adjustment image CG4 of the projector PJ2 are projected on the screen SCR with a partial overlapping area, wherein the adjustment image CG3 has R=255, G=160, B= With a pixel value of 0, the adjustment image CG4 has pixel values of R=0, G=160, and B=255. In addition, the image CG3 for adjustment and the image CG4 for adjustment in FIG. 10 are the state before performing position adjustment.

Also in the method for adjusting the position of a projected image according to Embodiment 2, one of the two adjustment images CG3 and CG4 (set as the adjustment image CG3 projected by the projector PJ1 ) is fixed, and the other adjustment image is fixed. An image (set as an adjustment image CG4 projected by the projector PJ2 ) is moved in the horizontal direction (left-right direction) on the screen SCR, and an optimum projection position is detected. In addition, by using a function that can move the position of the effective image display area of the image forming area of the liquid crystal modulation device of the projector PJ2 in units of pixels, the adjustment image CG4 can be easily moved in units of pixels.

The method for adjusting the position of a projected image according to Embodiment 2 can be performed in the same steps as the method for adjusting the position of a projected image related to Embodiment 1 using the device 1 for adjusting the position of a projected image (refer to FIG. 2 ), so the method here is simple. illustrate.

First, from a state in which the adjustment images CG3 and CG4 projected by the projectors PJ1 and PJ2 have been adjusted in a possible range by manual operation by the user, the adjustment image CG4 projected by the projector PJ2 is aligned in the horizontal direction (set The position after moving 10 pixels in the left direction) is used as the processing start position, and the operation of moving the projector PJ4 sequentially by 20 pixels in units of 1 pixel in the right direction from the processing start position is performed.

Then, the image capture device 11 captures the adjustment images CG3 and CG4 on the screen SCR, and outputs the captured image data. The captured image data is input to the captured image data input unit 131 shown in FIG. 2 and stored in the captured image data storage unit 132 . Then, the evaluation value calculation unit 133 calculates an evaluation value for each position of one pixel unit of the adjustment image CG4 using the captured image data stored in the captured image data storage unit 132 . The calculation of the evaluation value can be performed in the same manner as in the first embodiment.

11 is a diagram showing the number of pixels determined to be white at each position from the processing start position "1" to the position "20" shifted by 20 pixels in the adjustment images CG3 and CG4 shown in FIG. 10 . In addition, in the example of FIG. 11 , the number of pixels determined to be white is the largest at position "10". That is, in the example shown in FIG. 11 , the adjustment images CG3 and CG4 projected by the projectors PJ1 and PJ2 have been manually adjusted by the user, and the result is determined to be the optimum projection position.

In addition, in the projected image position adjusting step in the projected image position adjusting method according to Embodiment 2, adjust The flowchart shown in FIG. 7 can be applied by replacing the images CG1 and CG2 with the images CG3 and CG4 for adjustment.

Furthermore, in the projection image position adjustment method according to Embodiment 2, the position of the adjustment image CG4 is determined by fixing the adjustment image CG3 among the adjustment images CG3 and CG4 and moving the adjustment image CG4. Conversely, the adjustment image CG4 may be fixed and the adjustment image CG3 may be moved.

In addition, in the position adjustment method of the projected image according to Embodiment 2, as described in FIG. 8 of Embodiment 1, one of the adjustment images (referred to as adjustment image CG4 ) may be moved from the processing start position. Any pixel, so as to set the best projection position.

(Embodiment 3)

In the method of adjusting the position of a projected image according to Embodiment 1 and Embodiment 2, it has been described that the vertical direction (vertical direction) and the horizontal direction (left and right direction) of each projected image from two projectors PJ1 and PJ2 arranged side by side in the horizontal direction are adjusted. direction), it is also possible to adjust the horizontal direction of each projected image from the two projectors PJ1 and PJ2 juxtaposed in the vertical direction using the adjustment images CG3 and CG4 used in the description of Embodiment 2. position adjustment.

Hereinafter, position adjustment in the horizontal direction of each projected image from the two projectors PJ1 and PJ2 arranged in the vertical direction using the adjustment images CG3 and CG4 will be described.

The multi-projection display to which the projected image position adjustment method according to Embodiment 3 is applied is different from FIG. 1 only in that two projectors PJ1 and PJ2 shown in FIG. 3 is an illustration of the structure of a multi-projection display related to the method for adjusting the position of projected images.

In addition, the projector PJ1 projects an image projected on the upper side in the vertical direction on the screen SCR, and the projector PJ2 projects an image projected on the lower side in the vertical direction on the screen SCR. In addition, the respective projection images from the projectors PJ1 and PJ2 are projected on the screen in a tiled manner, so that some of them have overlapping regions.

FIG. 12 is a schematic diagram showing an example of adjustment images CG3 and CG4 respectively projected on the screen SCR from two projectors PJ1 and PJ2 arranged in parallel in the vertical direction. FIG. 12( a ) shows the image CG3 for adjustment, and FIG. 12( b ) shows the image CG4 for adjustment.

FIG. 13 is a schematic diagram showing a state in which the adjustment images CG3 and CG4 shown in FIG. 12 are projected on the screen SCR with a partial overlapping region. As shown in FIG. 13 , the adjustment image CG3 of the projector PJ1 and the adjustment image CG4 of the projector PJ2 are projected on the screen SCR with a partial overlapping area, wherein the adjustment image CG3 has R=255, G=160, With a pixel value of B=0, the image data CG4 for adjustment has pixel values of R=0, G=160, and B=255. In addition, the image CG3 for adjustment and the image CG4 for adjustment in FIG. 13 are the state before performing position adjustment.

In the method for adjusting the position of a projected image according to Embodiment 3, one of the two adjustment images CG3 and CG4 (set as the adjustment image CG3 projected by the projector PJ1 ) is fixed, and the other adjustment image (The adjustment image CG4 projected by the projector PJ2) is moved in the horizontal direction (left-right direction) on the screen SCR to detect the optimal projection position.

The method for adjusting the position of a projected image according to Embodiment 3 can be performed using the device 1 for adjusting the position of a projected image (see FIG. 2 ), and it can be performed in substantially the same steps as the method for adjusting the position of a projected image according to Embodiment 1. Therefore, here Give a brief explanation.

First, from the state where the adjustment images CG3 , CG4 projected by the projectors PJ1 , PJ2 have been adjusted within the possible range by manual operation by the user, the adjustment image CG4 projected by the projector PJ2 is aligned in the horizontal direction (set to The position after shifting 10 pixels in the left direction) is used as the processing start position, and an operation of sequentially moving the adjustment image CG4 by 20 pixels in units of 1 pixel in the right direction from the processing start position is performed.

Adjustment images CG3 and CG4 on the screen SCR are captured by the imaging device 11, and the captured image data are output. The captured image data is input to the captured image data input unit 131 shown in FIG. 2 and stored in the captured image data storage unit 132 . Then, the evaluation value calculation unit 133 calculates an evaluation value for each position of one pixel unit of the adjustment image CG4 using the captured image data stored in the captured image data storage unit 132 . The calculation of the evaluation value can be performed by the same method as the method of adjusting the position of the projected image according to the first embodiment.

That is, the number of pixels determined to be white at each position when the adjustment image CG4 is moved in units of one pixel is acquired, and the position with the largest number of pixels is acquired. And, the position with the largest number of pixels is set as the optimum projection position. As a result, the respective projected images of the projectors PJ1 and PJ2 are properly adjusted in the horizontal direction, and high-quality images without discontinuous joints or blurring in overlapping regions can be displayed.

In addition, the projected image position adjustment step in the projected image position adjustment method according to Embodiment 3 is adjusted by the flow chart shown in FIG. The flowchart shown in FIG. 7 can be applied by replacing the images CG1 and CG2 with the images CG3 and CG4 for adjustment.

Furthermore, in the projection image position adjustment method according to Embodiment 3, the position of the adjustment image CG4 is determined by fixing the adjustment image CG3 among the adjustment images CG3 and CG4 and moving the adjustment image CG4. Conversely, the adjustment image CG4 may be fixed and the adjustment image CG3 may be moved.

Furthermore, in the projection image position adjustment method according to Embodiment 3, one of the adjustment images (referred to as adjustment image CG4 ) may be moved from the processing start position as described in FIG. 8 of Embodiment 1. Any pixel, so as to set the best projection position.

(Embodiment 4)

In the projected image position adjustment method according to Embodiment 3, the case where the horizontal direction (left-right direction) position adjustment of each projected image from the two projectors PJ1 and PJ2 juxtaposed in the vertical direction is performed has been described, but Using the adjustment images CG1 , CG2 used in the description of Embodiment 1, position adjustment in the vertical direction (vertical direction) of each projected image from the two projectors PJ1 , PJ2 aligned in the vertical direction is performed.

FIG. 14 is a schematic diagram showing a state in which adjustment images CG1 and CG2 are projected on the screen SCR from two projectors PJ1 and PJ2 aligned in the vertical direction with a partly overlapping area. In addition, the image CG1 for adjustment and the image CG2 for adjustment in FIG. 14 are the state before performing position adjustment.

In addition, in the projected image position adjustment method according to Embodiment 4, one of the two adjustment images CG1 and CG2 (set as the adjustment image CG1 projected by the projector PJ1 ) is fixed, and the other is adjusted. The optimal projection position is detected by moving the image (adjustment image CG2 projected by projector PJ2 ) in the vertical direction (vertical direction) on the screen SCR.

Then, from a state in which the adjustment images CG1 and CG2 projected by the projectors PJ1 and PJ2 have been adjusted within a possible range by manual operation by the user, the adjustment image CG2 projected by the projector PJ2 is aligned in the vertical direction (set to The position after moving 10 pixels in the upward direction) is used as the processing start position, and an operation of sequentially moving the adjustment image CG2 by 20 pixels in units of 1 pixel in the downward direction from the processing start position is performed. In addition, the processing for setting the optimum projection position, such as the calculation method of the evaluation value, can be performed in the same manner as described above, so the description thereof will be omitted.

In addition, for the projection image position adjustment step in the projection image position adjustment method according to Embodiment 4, the flowchart shown in FIG. 7 used in the description of the projection image position adjustment method according to Embodiment 1 can be applied.

Furthermore, in the projection image position adjustment method according to Embodiment 4, the position of the adjustment image CG2 is determined by fixing the adjustment image CG1 among the adjustment images CG1 and CG2 and moving the adjustment image CG2. Conversely, the adjustment image CG2 may be fixed and the adjustment image CG1 may be moved.

In addition, in the projection image position adjustment method according to Embodiment 4, as described in FIG. 8 of Embodiment 1, one adjustment image (referred to as adjustment image CG2 ) can be moved arbitrarily from the processing start position. pixels to set the best projection position.

As described above, as described in Embodiments 1 to 4, by using the adjustment images CG1 and CG2 and the adjustment images CG3 and CG4 , it is possible to rapidly and accurately analyze images from two parallel images in the horizontal and vertical directions. Adjust the horizontal and vertical positions of the projected images of the projectors PJ1 and PJ2.

That is, by using the adjustment images CG1 and CG2 for the projected images from the two projectors PJ1 and PJ2, it is possible to quickly and accurately adjust the position in the vertical direction, and by using the adjustment images CG3 and CG4, it is possible to quickly and accurately adjust the position. Position adjustment in the horizontal direction is performed with high precision.

In addition, by appropriately combining the position adjustment methods of the projected image according to Embodiments 1 to 4 as needed, it is possible to quickly and accurately adjust m×n projectors using m projectors in the horizontal direction and n projectors in the vertical direction. Adjust the position of each projected image of each projector in the multi-projection display.

For example, FIG. 15 is a diagram of a multi-projection display with m=4, n=4, that is, 4 x 4 totaling 16 projectors PJ1, PJ2, .... In this multi-projection display, horizontal and vertical Two projectors arranged side by side in the direction are used as a group, and the position adjustment operation described in the position adjustment method of the projected image according to Embodiment 1 to Embodiment 4 is performed, so that all projections can be performed with high precision in a short time Adjust the position of the projected image of the instrument.

In addition, the present invention is not limited to the above-described respective embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in each of the above-mentioned embodiments, the case where the projection images from the projectors PJ1 and PJ2 are tiled and projected on the screen SCR is described, but it is not only applicable to the tiled projection, but also applicable to the tiled projection from each projector PJ1. , The so-called stacked projection in which the projected images of PJ2 are superimposed on the same projected area.

Furthermore, in each of the foregoing embodiments, an example in which white appears in the overlapping region when two adjustment images are projected with an appropriate positional relationship has been described, but as long as the two adjustment images are projected with an appropriate positional relationship, It is only necessary that a predetermined feature appears in the overlapping region, so the color that appears when two adjustment images overlap is not limited to white.

Furthermore, in each of the above-mentioned embodiments, the threshold value of the pixel value is set to "240, 240, 240" in consideration of fluctuations due to device characteristics such as gamma characteristics or lighting conditions, but the threshold value may also be based on Set the optimum value for the environmental conditions such as equipment characteristics or lighting.

In addition, the distance between the lines of the adjustment images CG1 , CG2 and the adjustment images CG3 , CG4 is 20 pixels, but not limited to 20 pixels, but preferably equal to or greater than 10 pixels.

In addition, it is preferable to calculate the evaluation value by taking a plurality of images in a state where the two adjustment images are in the same positional relationship, and calculate the evaluation value using the plurality of imaging data. In this way, by calculating an evaluation value using captured image data obtained by multiple imaging, it is possible to obtain a highly accurate evaluation value that reduces the influence of noise of the imaging device. In this case, it is considered to obtain the average value of the evaluation values calculated using the captured image data obtained by taking a plurality of times, and this average value is used as the evaluation value to be obtained.

In addition, in each of the above-mentioned embodiments, it has been described that the position adjustment of two projectors among the plurality of projectors is performed. The situation where the projected images of multiple sets of projectors are adjusted in position at the same time.

For example, if it is a multi-projection display using 4 projectors of 2 x 2, the upper two projectors can be regarded as a group, and the horizontal direction of the projected image from the upper group of projectors can be adjusted. Simultaneously with the position adjustment, the two lower projectors are regarded as a group, and the horizontal direction position adjustment of the projected image from the lower group of projectors is performed. In this way, by simultaneously adjusting the position of projected images from a plurality of projectors or groups of projectors, when a multi-projection display is composed of a plurality of projectors as shown in FIG. .

Furthermore, the projectors used in the above-mentioned embodiments have been described assuming a three-panel projector of RGB three primary colors, but the present invention can also be applied to a multi-primary projector of four primary colors or higher.

Furthermore, in each of the aforementioned embodiments, in order to arrange (project) projected images from a plurality of projectors in the horizontal direction or vertical direction, the projectors are physically arranged in the horizontal direction or the vertical direction. Instead of the physical position, the projection position change function such as lens shift is used.

Furthermore, in each of the above-mentioned embodiments, as the adjustment images CG1, CG2 and the adjustment images CG3, CG4, figures composed of straight lines in the horizontal direction and the vertical direction are used, but as the adjustment images CG1, CG2 and the adjustment images For the graphics of CG3 and CG4, any graphics may be used as long as they have lines.

FIG. 16 is a diagram showing a modified example (No. 1) of a graphic of an image for adjustment, FIG. 17 is a diagram showing a modified example (No. 2) of a graphic of an image for adjustment, and FIG. 18 is a diagram showing a modified example of a graphic of an image for adjustment. (third) of the picture.

Fig. 16(a) is an example of an adjustment image composed of a straight line with an inclination, and Fig. 16(b) (i) and (ii) are adjustment images composed of a pattern with periodic line intervals (i) and (ii) of FIG. 16(c) are examples of adjustment images composed of curve graphics, and FIG. 16(d) is an example of adjustment images composed of dotted line graphics.

And, Fig. 17 (a) is an example of an image for adjustment composed of a pattern whose thickness is periodic, Fig. 17 (b) is an example of an image for adjustment composed of a pattern using a pattern, and Fig. 17 (c) is An example of an adjustment image composed of graphics using characters, FIG. 17(d) is an example of an adjustment image composed of graphics with adjacent line lengths and styles, and FIG. 17(e) is an example of an adjustment image using illustrations, etc. An example of an image for adjustment with a graphic composition.

And, Fig. 18(a) is an example of an image for adjustment made up of lines with layers, and Fig. 18(b) is an example of an image for adjustment made up of the same line with different colors in the up and down direction, and Fig. 18( c) is an example of an adjustment image composed of figures in which adjacent lines have different colors.

In addition to the examples shown in these FIGS. 16 to 18, for example, graphs that reverse colors, graphs that change colors on the time axis, graphs that change shapes on the time axis, these various graphs, or Various figures such as figures formed by combining FIGS. 12 to 14 are used as adjustment images.

In addition, it is also possible to create a projected image position adjustment program that describes the processing steps for realizing the present invention described above, and record the projected image position adjustment program on various recording media. Therefore, the present invention also includes a recording medium in which the program for adjusting the position of the projected image is recorded. In addition, a program for adjusting the position of the projected image can also be obtained from the Internet.

Claims (13)

1. the location regulation method of a projected image, use two adjustment images, adjust two projector from multi-projection display with the position of two projected images of mode projection on the projecting plane with overlapping region with a plurality of projector, it is characterized in that the location regulation method of this projected image comprises:

The 1st step provides and described two adjustment, two corresponding adjustment view data of image to described two projector, when described two adjustment are projected with suitable position relation with image, predetermined feature occurs in described overlapping region;

The 2nd step according to taking the photographed images data that obtain from the described projecting plane of described two adjustment of described two projector projections during with image, is calculated the evaluation of estimate that is associated with described feature; And

The 3rd step is carried out the position adjustment of described two projected images according to described evaluation of estimate;

Wherein, described two adjustment have the 1st figure based on the 1st color with an adjustment in the image with image, another is adjusted with image has the 2nd figure based on the 2nd color, set the value of described two adjustment respectively, make described the 1st color and the 2nd color when described the 1st figure and the 2nd graphics overlay, show white with red composition, green composition and blue composition in the image.

2. the location regulation method of projected image according to claim 1, it is characterized in that, in described the 2nd step, described two adjustment are moved with 1 pixel unit along continuous straight runs or vertical direction with image with at least one adjustment in the image, when making described adjustment move 1 pixel unit, just calculate described evaluation of estimate with image.

3. the location regulation method of projected image according to claim 1 and 2 is characterized in that, described figure has the lines of the width corresponding with 1 pixel.

4. the location regulation method of projected image according to claim 1 and 2 is characterized in that, described feature is the pixel value in the described photographed images data.

5. the location regulation method of projected image according to claim 4 is characterized in that, described evaluation of estimate is the pixel count of described pixel value more than or equal to threshold value,

In described the 3rd step, be described pixel value maximum position more than or equal to the pixel count of threshold value,, carry out the position adjustment of described two projected images as the best projection position of described two projected images.

6. the location regulation method of projected image according to claim 5 is characterized in that, is described threshold setting the corresponding value of color that just occurs with each graphics overlay in the image with described two adjustment.

7. the location regulation method of projected image according to claim 1, it is characterized in that, described the 1st color is the color with strong relatively red composition and relative weak green composition, described the 2nd color be have strong relatively blue composition and relative a little less than the color of green composition.

8. according to the location regulation method of each described projected image among claim 1-2, the 5-7, it is characterized in that,, be in image in described two adjustment under the state of same position relation, repeatedly take, calculate described evaluation of estimate in described the 2nd step.

9. according to the location regulation method of each described projected image among claim 1-2, the 5-7, it is characterized in that, in described the 3rd step, the position of effective image display area of the image forming area of the photoelectricity modulating device of any projector in two projector is moved with pixel unit, carry out the position adjustment of described two projected images.

10. the position regulator of a projected image, use two adjustment images, adjust two projector from multi-projection display with the position of two projected images of mode projection on the projecting plane with overlapping region with a plurality of projector, it is characterized in that the position regulator of described projected image has:

Adjust and use image-data output device, it is to described two projector output and described two adjustment, two corresponding adjustment view data of image, when described two adjustment are projected with suitable position relation with image, in described overlapping region predetermined feature appears;

Camera head, it can take described two the adjustment images of projection on described projecting plane;

The evaluation of estimate calculation element, it calculates the evaluation of estimate that is associated with described feature according to utilizing described camera head to taking the photographed images data that obtain from the described projecting plane of described two adjustment of described two projector projections during with image; And

Control device is adjusted in the position, and it carries out the position adjustment of described two projected images according to described evaluation of estimate;

Wherein, described two adjustment have the 1st figure based on the 1st color with an adjustment in the image with image, another is adjusted with image has the 2nd figure based on the 2nd color, set the value of described two adjustment respectively, make described the 1st color and the 2nd color when described the 1st figure and the 2nd graphics overlay, show white with red composition, green composition and blue composition in the image.

11. a multi-projection display has a plurality of projector, can with from the projected image of described a plurality of projector with mode projection with overlapping region on the projecting plane, it is characterized in that having:

Adjust and use image-data output device, it is to described two projector output and two adjustment, two corresponding adjustment view data of image, when described two adjustment of two projector projections in described a plurality of projector are projected with suitable position relation with image, in described overlapping region predetermined feature appears;

The evaluation of estimate calculation element, it is according to taking the photographed images data that obtain from the described projecting plane of described two adjustment of described two projector projections during with image, the evaluation of estimate that calculating is associated with described feature; And

Control device is adjusted in the position, and it carries out the position adjustment of described two projected images according to described evaluation of estimate;

Wherein, described two adjustment have the 1st figure based on the 1st color with an adjustment in the image with image, another is adjusted with image has the 2nd figure based on the 2nd color, set the value of described two adjustment respectively, make described the 1st color and the 2nd color when described the 1st figure and the 2nd graphics overlay, show white with red composition, green composition and blue composition in the image.

12. multi-projection display according to claim 11 is characterized in that, a plurality of projected images that described multi-projection display constitutes from described a plurality of projector can tile the ground projection in the mode with overlapping region on the projecting plane.

13. multi-projection display according to claim 11 is characterized in that, a plurality of projected images that described multi-projection display constitutes from described a plurality of projector can pile up projection on the projecting plane in the mode with overlapping region.

Images