JP2015109560A - Display system, display control device, and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a change in brightness of an overlapping part in performing large screen display by using a plurality of projectors.SOLUTION: A display control device controls a plurality of projectors 10 and 11 having partially overlapping projection areas. The display control device includes an object detection unit 6 that detects an object from the projection areas of the plurality of projectors, and an extinction correction control unit 4 that performs control of the brightness of a projection image corresponding to an overlapping area of the projection areas of the plurality of projectors on the basis of the position of the detected object.

Description

  The present invention relates to a display system, a display control device, and a method for displaying a desired image by combining partial images projected by a plurality of projection type display devices.

  2. Description of the Related Art Conventionally, projector-type display devices that project images onto a screen and display images have become widespread. In addition, there is a display system that displays a large screen by combining partial screen displays of a plurality of projectors in order to display an image with a higher pixel count.

  The projected images of the adjacent projectors are aligned so that the adjacent portions overlap and are displayed so that the screen is not interrupted. As the number of pixels increases, the accuracy of alignment is required. However, there are cases where the position is deviated from a desired alignment position for various reasons. When alignment is performed without using a dedicated jig, the pixel positions may be shifted without exactly overlapping each other. Due to changes in component dimensions due to changes in temperature and humidity, minute vibrations, changes with time, etc., there are cases where the position is shifted from the alignment position at the time of installation. If the image of the overlapping area is superimposed as it is when a position shift occurs, the image blurs or becomes a double copy, and the image becomes very difficult to see.

  For example, Patent Document 1 discloses a method for making a joint of an image of a projector inconspicuous in an overlapping region.

  That is, in Patent Document 1, by changing the division position of the partial area of each projection device at a predetermined timing, the change in luminance caused by the positional deviation of the projection device is temporally diffused and suppressed to the extent that it cannot be seen. It is described.

Japanese Patent No. 4400200

  However, when a large screen display is performed using a plurality of projectors, the display image may be difficult to see.

  For example, when the joints of the projected images from a plurality of projectors are visible, there is a risk that the display image on the large screen may be difficult to see.

  The present invention has been made in view of the above problems, and an object thereof is to improve the quality of a display image when a large screen is displayed using a plurality of projectors.

  In order to solve the above problems, the display control apparatus of the present invention has, for example, the following configuration. That is, a display control apparatus that controls a plurality of projectors whose projection areas partially overlap, the detection means for detecting an object from the projection areas of the plurality of projectors, and the position of the object detected by the detection means And control means for controlling the brightness of the projection image corresponding to the overlapping area of the projection areas of the plurality of projectors.

  According to the present invention, it is possible to improve the quality of a display image when a large screen is displayed using a plurality of projectors.

The block diagram which shows the structure of the display control apparatus of embodiment The block diagram which shows the structure of the display system of embodiment The figure which shows the shape of the dimming correction curve of the display control apparatus of embodiment The figure which shows the change of the position of the dimming correction curve of the display control apparatus of embodiment. Flowchart for explaining the operation of the display control apparatus of the embodiment The figure which shows the user interface of edge switching of the display system of embodiment The figure which shows the mode of the overlap area control of the display system of embodiment The block diagram which shows the structure of the display control apparatus of embodiment Flowchart for explaining the operation of the display control apparatus of the embodiment

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

<First Embodiment>
In this embodiment, when a display system composed of multiple projectors performs edge blending, a texture (object) existing in an overlapping area of the projection area of the projector is detected, and the light is dimmed so that the intersection portion matches the position of the texture. An example of controlling the correction curve will be described.

  In the present embodiment, the texture (object) is, for example, a line segment detected by a joint between a plurality of screens. As another example of the object, for example, there is a line segment detected by cracks or scratches existing on a wall that is a projection area. In addition, for example, a rectangle detected by the presence of a pillar on a wall that is a projection area also corresponds to an object in the present embodiment.

<Configuration of display system (FIGS. 2-3)>
The display system of the present embodiment is a multi-projector system that forms a single large screen by combining partial screens projected by a plurality of projection type display devices.

  FIG. 2 is a block diagram showing the configuration of the display system of this embodiment. In FIG. 2A, reference numerals 10 to 12 denote liquid crystal projectors. The projector 10 takes charge of the left partial area, the projector 11 takes charge of the central partial area, and the projector 12 takes charge of the right partial area.

  Reference numeral 13 denotes a screen, which is a projection surface for displaying projection images of the projectors 10 to 12. Reference numerals 14 and 15 denote areas where the projection areas of the projector overlap (overlapping areas). Thus, in the display system of this embodiment, the projection areas by the projectors partially overlap.

  FIG. 2B is an example of dimming correction of the projection images of the projectors 10 to 12. Reference numeral 20 denotes a partial area for which the projector 10 is in charge, 21 is a partial area for which the projector 11 is in charge, and 22 is a partial area for which the projector 12 is in charge. A region 23 on the right side of the partial region 20 overlaps with a left region 24 of the partial region 21. The area 25 on the right side of the partial area 21 overlaps the area 26 on the left side of the partial area 22. In these overlapping areas 23 to 26, when both projectors project the same image, the luminance is doubled and the joints are conspicuous.

  Therefore, the display control apparatus of the present embodiment performs dimming correction on these overlapping areas. The display control device changes the weighting of the luminance in the overlapping region by the dimming correction, and performs control so that the luminance gradually decreases as the screen edge is approached. The display control device sets the sum of the weights of the two projectors to a constant value, so that the synthesized image (projected image in the overlapping area) has the same brightness as the surrounding screen, so that the joint can be made inconspicuous.

  That is, the display control apparatus according to the present embodiment attenuates (decreases) the brightness of the projected image in the overlapping areas (overlapping areas 23 and 24) of the projection areas of the first projector (projector 10) and the second projector (projector 11). (Light correction) is controlled as follows. The display control apparatus performs correction for reducing the brightness of the projector 11 by 10% for the area where the brightness of the projector 10 is reduced by 90% in the overlapping area, and for the area for reducing the brightness of the projector 10 by 20%. The brightness of the projector 11 is lowered by 80%.

  The functions of the display control device to be described later are incorporated in each of the projectors 10 to 12 in FIG. 2, but the projector 11 that operates as the master device implements the function as the display control device of the present embodiment. And

  However, the present invention is not limited to this form, and the function of the display control apparatus of the present embodiment may exist as a separate apparatus from the projector. In addition, the function of the display control device of the present embodiment may be incorporated in some projectors (for example, only the projector 11).

  The shape of the darkening correction curve will be described with reference to FIG. Reference numeral 40 denotes a dimming correction curve of a projector in charge of the left partial area, and reference numeral 41 denotes a dimming correction curve of a projector in charge of the right partial area. Each curve gradually decreases in brightness of the projected image as it approaches the end of the projected area, and the amount of attenuation of the projected image in the overlapping area and the brightness of the surrounding projected image (projected image in the overlapped area). It shows that the amount of attenuation is constant. FIG. 3 shows that the luminance attenuation amount is sharply changed at a position 42 where the curves intersect. By making the shape steep in this way, it is difficult to see the joints of the projection areas by a plurality of projectors.

  Returning to FIG. 2C, 30 is an image obtained as a result of combining the respective projection areas 20 to 22 of the projectors 10 to 12. As a result of the dimming correction, the joints of the projection areas 20 to 22 become inconspicuous and can be displayed as a single large screen image. 31 and 32 are the positions of the seams obtained as a result of the dimming correction. That is, the seams 31 and 32 respectively correspond to the region 42 in FIG.

  Reference numeral 33 denotes a texture (object) existing on the surface of the projection surface, which cuts the screen vertically. The object 33 existing on the projection surface is, for example, a screen fold or a joint when a plurality of screens are used. Since the joint 32 and the object 33 of the projection areas of the two projectors exist in the vicinity, the screen becomes difficult to see. In the present embodiment, it is possible to reduce the difficulty in viewing the screen by moving the joint 32 according to the position of the object 33.

<Mechanism to follow the seam (Fig. 4)>
A mechanism for causing the joints of the projection areas of a plurality of projectors to follow the position of the object will be described with reference to FIG. Reference numeral 33 denotes an object detected from the projection surface. At a point 50 on the object, a darkening correction curve is generated so as to intersect at the position 53 as shown in FIG. The intersection 53 corresponds to the intersection of the region 42 in FIG. That is, the display control apparatus according to the present embodiment generates a dimming correction curve at the intersection 53 in FIG. 4A so that the luminance attenuation rates of the projected images from the plurality of projectors are equal. At the point 51, as shown in FIG. 4B, the light attenuation correction curve is generated so as to intersect at the position of 54. At the point 52, as shown in FIG. 4C, a darkening correction curve is generated so as to intersect at the position 55.

  That is, the display control apparatus according to the present embodiment determines a region (region 42 in FIG. 3) in which the brightness of the image projected by the projector is sharply attenuated according to the position of the object. Further, as shown in FIG. 4, the display control apparatus according to the present embodiment determines the intersection position of the dimming correction curve based on the position of the object for each predetermined position in the Y direction. In this way, since the joint of the projection area of the projector can be made to follow the position of the object (texture), the quality of the display screen in a large screen display by a plurality of projectors can be improved.

<Configuration of Projection Type Display Device (FIG. 1)>
FIG. 1 is a block diagram showing the configuration of projectors 10-12. Although illustration of the projector 12 is omitted in FIG. 1, the projectors 11 and 12 have the same functions as the projector 10.

  In FIG. 1, reference numeral 1 denotes a video input unit that inputs uncompressed video data from an external video source device. Video data is input by a transmission method based on various interface standards such as HDMI (registered trademark), DVI, and display port. Reference numeral 3 denotes a display unit that projects image data onto a projection area on a screen, for example. The display unit 3 includes a liquid crystal panel, a panel drive circuit, a light source lamp, a prism, a projection lens, and the like, and performs display output according to the timing of the synchronization signal.

  Reference numeral 5 denotes a camera (photographing unit) that photographs a screen (projection area) on which an image is projected. Reference numeral 6 denotes an object detection unit that detects an object on the screen from the screen image captured by the camera 5. The object detection unit 6 detects, for example, an edge in a captured image of the projection area, and detects a line segment as an object by connecting the edges.

  A dimming correction control unit 4 generates a dimming correction curve based on the position of the object. The dimming correction control unit 4 generates a dimming correction curve so that the position of the object and the intersection (intersection point in the region 42 in FIG. 3) coincide with each other at predetermined intervals in the Y direction. The curve data may be stored as a table, or may be calculated sequentially based on a calculation formula. Moreover, you may make it increase / decrease the offset which generate | occur | produces the curve of an intersection part.

  The dimming correction control unit 4 includes a CPU, a memory, and the like, and the control is executed by software on the CPU. Reference numeral 2 denotes a dimming correction unit, which performs dimming correction on the overlapping region using the dimming correction curve generated by the dimming correction control unit 4.

  Although not shown, each of the projectors 10 to 12 includes a communication interface for exchanging information with other projectors. It is composed of wired or wireless communication means, and transmits / receives information related to light attenuation correction control described later. The communication interface may be an interface based on a standard protocol such as a wired LAN or a wireless LAN, or may be an interface based on a unique protocol.

  In this embodiment, the projectors 10 to 12 have the same configuration and functions, and the projector 11 will be described mainly with respect to an example in which the projector 11 controls the dimming correction including the other projectors 10 and 12 as a master device. . However, the present invention is not limited to this example. For example, when only one projector is provided with the camera 5, the projector serves as a master device to perform main control. The master device transmits control information to the slave device according to the control state. Other projectors become slave devices, and receive and control instructions sent from the master device.

  When a plurality of projectors can be the master device, it is possible for each projector to negotiate to determine the projector that will be the master device. For example, in the case of the display system as shown in FIG. 2, the projector 11 in charge of the central partial area among the projectors 10 to 12 can be the master device. Further, for example, if there is a projector having the widest angle of view of the camera 5 among the plurality of projectors 10 to 12, it can be used as the master device.

  In addition, when the projector 11 in charge of the central partial area does not include the camera 5, the user may output a message so that the projector 10 including the camera 5 is in charge of the central partial area. After the message is output, if the assigned areas of the projectors 10 and 11 are exchanged, the projector 10 can be configured as a master device.

<Process for Dimming Correction Control (FIG. 5)>
FIG. 5 is a flowchart for explaining the flow of the process of dimming correction control performed by the display control apparatus of the present embodiment. The process of FIG. 5 is executed by the projector 11 determined as the master device among the plurality of projectors 10 to 12. Note that the processing in FIG. 5 is realized by a CPU (not shown) included in the projector reading out a necessary program from the memory and executing it.

  In step S100, the display unit 3 displays (projects), for example, a white solid test pattern (test image) (test control). However, the test pattern is not limited to white solid. In step S101, the camera 5 captures a screen (projection area). In step S <b> 102, the object detection unit 6 performs an object (texture) detection process from the projection region using the image captured by the camera 5.

  In step S103, the dimming correction control unit 4 determines whether an object (texture) is detected in the overlapping area. If it is determined that an object is detected in the overlapping area, the process proceeds to step S104. If it is determined that an object is not detected, the process proceeds to step S107.

  In step S104, the dimming correction control unit 4 identifies the thickest line segment among the plurality of line segments detected as objects. The dimming correction control unit 4 causes the attenuation correction curve to follow the thickest object when a plurality of line segments are detected as objects. If a plurality of objects are not detected, step S104 can be skipped.

  In step S105, the dimming correction control unit 4 sends object position information to the projector as the slave device. The information to be transmitted is not limited to the position information of the object, but may be information on an attenuation correction curve. In other words, the projector as the master device can generate an attenuation correction curve for the projector as the slave device and send it to the projector as the slave device. Further, the shape of the attenuation correction curve that can be taken may be defined in advance, and code information specifying the shape may be transmitted from the master device to the slave device.

  In step S106, the light attenuation correction control unit 4 generates an attenuation correction curve according to the position information of the object. As described with reference to FIG. 3, the light attenuation correction curve is a curve in which the luminance is sharply attenuated in a specific region (corresponding to the region 42) corresponding to the position of the object among the overlapping regions. is there. That is, the dimming correction control unit 4 determines that the luminance attenuation amount of the projection area corresponding to the specific area corresponding to the position of the object is larger than the change in the luminance attenuation amount of the projection area in the non-specific area. Controls the attenuation of.

  Note that when determining the attenuation correction curve for the master device and the attenuation correction curve for the slave device in step S105 and sending the information on the attenuation correction curve for the slave device, step S106 can be skipped.

  On the other hand, step S107 is processing when an object is not detected. In step S107, the dimming correction control unit 4 generates a default attenuation correction curve. The default attenuation correction curve is, for example, an attenuation correction curve in which an intersection comes to the center of the overlapping region. If a default attenuation correction curve is stored in advance in a memory or the like, the default attenuation correction curve is read from the memory in step S107.

  In step S108, the dimming correction control unit 4 causes the display unit 3 to display (project) the image after the attenuation correction processing by the dimming correction unit 2. That is, the dimming correction control unit 4 controls the brightness of the projection image corresponding to the overlapping area of the projection areas of the plurality of projectors based on the position of the object in step S108.

  In the projector as the slave device, when the position information of the object is received from the projector as the master device, an attenuation correction curve is generated according to the position information of the object. When the object position information is not received, an attenuation correction curve at the default position is generated. Further, when the information on the attenuation correction curve is received from the master device, the projector as the slave device performs an attenuation correction process according to the received attenuation correction curve, and displays (projects) the processed image.

  By performing the above processing, the light attenuation correction curve can be controlled so that the intersecting portion matches the object existing in the overlapping region.

<Example of user interface for texture change (FIG. 6)>
FIG. 6 is an example of a user interface of the present embodiment. The user interface as shown in FIG. 6 can be displayed on a display of a PC connected to the projector. When the user interface is mounted on the PC, the display control apparatus according to the present embodiment can receive an input to the user interface from the PC by a reception unit (not illustrated). However, the present invention is not limited to this, and for example, the user interface can be realized by a display provided in the projector.

  In FIG. 6A, reference numerals 60 and 61 denote screens. As shown in FIG. 6A, the screens 60 and 61 are arranged apart from each other. 62 is a projection area of the projector in charge of the left side, and 63 is a projection area of the projector in charge of the right side. Reference numeral 66 denotes a cursor indicating the position of the object being followed. FIG. 6A shows that the dimming correction curve is generated at the position of the edge 64 of the screen 60 so that the luminance attenuation rates of the projected images by the two projectors match (intersect). Yes.

  An example of switching the following object will be described with reference to FIG. The user performs an operation for moving the cursor 66 to the right using a user input unit (not shown). An edge 65 of the screen 61 exists on the right side of the cursor 66. When the position of the cursor 66 after the user moves is the position of the edge 65, the attenuation correction control unit 4 generates an attenuation correction curve so as to match the position of the edge 65.

  That is, the attenuation correction control unit 4 determines the dimming correction curve so that the position of the edge 65 and the joints of the projection areas of the plurality of projectors (intersection points in the area 42 in FIG. 3) match, Control the attenuation. When the luminance attenuation control based on the light attenuation correction curve that matches the position of the edge 65 is completed, a cursor 67 is displayed. As described above, by using the user interface according to the present embodiment, for example, when a plurality of line segments (edges 64 and 65) are detected as objects, the luminance attenuation should be controlled based on the position of any object. It becomes possible to specify.

  In addition, by using the user interface of the present embodiment, for example, when there is a deviation between the position where the object is detected and the position where the user wants to be the boundary of the projection area, the position is corrected. Will be able to.

  As described above, the display control apparatus according to the present embodiment detects an object from the overlapping area of the projection areas of a plurality of projectors, and the position of the object and the joint of the projection areas (intersection point of the area 42 in FIG. 3) are detected. The dimming correction curve is controlled to match. As a result, the seam of the projection area becomes less noticeable, so that the quality when a large screen is displayed using a plurality of projectors can be improved.

  The present invention is not limited to the above-described embodiments, and can be widely applied.

  In the present embodiment, the case where the projection areas of the projection type display device (projector) are arranged side by side has been described, but the projection areas may be arranged vertically. In this case, the display control apparatus detects an object that traverses mainly in the left-right direction, and controls the attenuation of luminance in the overlapping area so that the position of the object matches the joint of the projection area of the projector.

  In the present embodiment, when a plurality of line segments are detected as objects, the example in which the luminance attenuation is controlled in accordance with the position of the thickest line segment has been described. However, the present invention is not limited to this example. As another example, for example, the attenuation of luminance may be controlled in accordance with the position of the longest line segment among a plurality of line segments, or the position of the line segment of the darkest color (color close to black) The attenuation of luminance may be controlled in accordance with the above. In this case, the process of step S104 in FIG. 5 is changed as appropriate.

  In this embodiment, the example in which the object is detected using the captured image with respect to the projection area has been described, but the present invention is not limited to this example. As another example, for example, it is possible to detect a step in the projection area using a distance sensor. When a projection area is formed by combining a plurality of screens, some gaps or steps may occur at the joints of the screens.

  In such a case, the object detection unit 6 detects a gap or a step at the seam of the screen as an object, and uses the dimming correction curve so that the position of the object approaches the seam of the projection area of the projector. Controls the attenuation of brightness. By doing so, the display control apparatus can realize the processing of the present embodiment without the camera 5.

  In this embodiment, the example in which the projector incorporates the camera 5 has been mainly described. However, a configuration in which the camera 5 is externally attached may be used. In this case, the camera 5 is installed at a position where the screen can be looked down on. The camera 5 and the projector include a wired or wireless communication unit, and exchanges captured images in the projection area.

<Second Embodiment>
Next, the second embodiment will be described with a focus on differences from the first embodiment. In the present embodiment, an example will be described in which, when an object (texture) in the projection area protrudes from the overlapping area, the overlapping area is expanded by changing the projection area so that the object is included in the overlapping area. The change of the projection area can be realized by, for example, a swivel.

<Example of operation to widen overlapping area (FIG. 7)>
An example of the operation of the display control apparatus when an object in the projection area exists outside the overlapping area will be described with reference to FIG. It should be noted that, as in the first embodiment, the display control device may be present inside the projector or may be a device different from the projector.

  In FIG. 7A, 70 is a projection area of the projector 10 in charge of the left side, 71 is a projection area of the projector 11 in charge of the right side, 72 is an overlapping area, and 73 is an object detected from the projection area. In FIG. 7, the object protrudes from the overlapping area at the upper end and the lower end. In such a case, the display control device sweeps the projection area of each projector in the direction of the arrow in FIG. 7 to widen the overlapping area.

  FIG. 7B shows a state after the overlapping area is expanded by the swivel. Reference numeral 74 denotes an overlapping area after being expanded. By extending the overlapping area, the object 73 is accommodated in the overlapping area 74. The display control apparatus according to the present embodiment generates a dimming correction curve after extending the overlapping region. By doing so, it is possible to make an object that protrudes from the overlapping area inconspicuous before expansion.

<Configuration of Projection Type Display Device (FIG. 8)>
Similar to the first embodiment, the display system according to the present embodiment is a multi-projector system that forms a single large screen by combining partial areas projected by a plurality of projection-type display devices (projectors).

  FIG. 8 is a block diagram showing the configuration of projectors 10-12. The projector 12 is not shown. The same elements as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, a swivel control unit 7 is added. The swivel control unit 7 changes the size of the overlapping area by rotating the projector. The swivel control unit 7 extends the overlapping region of the projector so that the object included in the non-overlapping region is included in the overlapping region according to the position information of the object detected by the object detecting unit 6.

  FIG. 7A shows a state before the control by the swivel control unit 7, and shows a state where the object 73 is included in each of the overlapping area and the non-overlapping area. On the other hand, FIG. 7B shows a state after the control by the swivel control unit 7 and shows a state where the object 73 is included in the overlapping area but not included in the non-overlapping area. .

  Note that the method of expanding the overlapping region is not limited to the above method. As another method, for example, the swivel control unit 7 may include a lens shift mechanism instead of the rotation mechanism, and shift the optical axis to change the size of the overlapping region. As another method, the projector main body may be moved in the horizontal direction by a pan mechanism or a user operation. An arbitrary control method can be used for extending the overlapping area.

<Process for Dimming Correction Control (FIG. 9)>
FIG. 9 is a flowchart for explaining the flow of the process of dimming correction control performed by the display control apparatus of this embodiment. Similarly to the first embodiment, the process of FIG. 9 is executed by the projector 11 determined as the master device among the plurality of projectors 10 to 12. Note that the processing in FIG. 9 is realized by a CPU (not shown) included in the projector reading out a necessary program from the memory and executing it.

  In step S100, the display unit 3 displays (projects), for example, a white solid test pattern. However, the test pattern is not limited to white solid. In step S101, the camera 5 captures a screen (projection area). In step S <b> 102, the object detection unit 6 performs an object (texture) detection process from the projection region using the image captured by the camera 5.

  In step S103, the dimming correction control unit 4 determines whether an object (texture) is detected in the overlapping area. If it is determined that an object is detected in the overlapping area, the process proceeds to step S200. If it is determined that an object is not detected in the overlapping area, the process proceeds to step S107.

  In step S200, the object detection unit 6 determines whether the object protrudes from the overlapping area. If it is determined that the object protrudes from the overlapping area, the process proceeds to step S201. If it is determined that the object does not protrude from the overlapping area, the process proceeds to step S105.

  In step S201, the object detection unit 6 sends the position information of the overlap area to another projector. The overlapping area position information sent in step S201 is information indicating how much the overlapping area is to be expanded. The swivel control unit 7 of the projector (for example, the projector 10) that has received the position information of the overlapping area from the projector 11 performs an amount control according to the position information and extends the overlapping area.

  In step S202, the swivel control unit 7 performs control for extending the overlapping area. More specifically, the swivel control unit 7 rotates the projector 11 so that the object that has protruded from the overlapping area is accommodated in the overlapping area. Note that the method of extending the overlap region is not limited to this method, and various methods such as a method using a lens shift function and a horizontal movement of the projector itself can be used.

  In step S <b> 105, the dimming correction control unit 4 sends object position information to the projector as a slave device. Note that the information to be transmitted is not limited to the position information of the object, but may be information on an attenuation correction curve, as in the first embodiment.

  In step S106, the attenuation correction control unit 4 generates an attenuation correction curve according to the position information of the object. On the other hand, step S107 is processing when an object is not detected. In step S107, the attenuation correction control unit 4 generates a default attenuation correction curve. The default attenuation correction curve is, for example, an attenuation correction curve in which an intersection comes to the center of the overlapping region. In step S <b> 108, the attenuation correction control unit 4 causes the display unit 3 to display (project) the image after the attenuation correction processing by the dimming correction unit 2.

  When the adjacent projection device (projector as a slave device) receives the position information of the overlapping area, it drives its own swivel control unit 7 so that the object protruding from the overlapping area is within the overlapping area. Rotate to extend the overlap area. Further, when the adjacent projection device receives the position information of the object, the adjacent projection device generates an attenuation correction curve according to the position information of the object. If no object position information is received, a default attenuation correction curve is generated.

  As described above, according to the present embodiment, in addition to the same effects as the above-described embodiment example, even if the object protrudes from the overlapping area, the joint between the position of the object and the projection area of the projector is obtained. Can be brought closer.

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

Claims (15)

A display control apparatus for controlling a plurality of projectors whose projection areas partially overlap,
Detecting means for detecting an object from projection areas of the plurality of projectors;
A display control apparatus comprising: control means for controlling brightness of a projection image corresponding to an overlapping area of the projection areas of the plurality of projectors based on the position of the object detected by the detection means.   The display control apparatus according to claim 1, wherein the detection unit detects a line segment as an object from the projection area.   The control unit controls the change in the brightness attenuation amount of the projection image corresponding to the specific area according to the position of the object to be larger than the change in the brightness attenuation amount of the projection image in the non-specific area. The display control apparatus according to claim 1, wherein the display control apparatus is a display control apparatus. A photographing means for photographing projection areas of the plurality of projectors;
The display control apparatus according to claim 1, wherein the detection unit detects the object using a captured image of the projection area by the imaging unit. Test control means for projecting a test image to each of the plurality of projectors;
The display control apparatus according to claim 4, wherein the detection unit detects the object using a photographed image of the projection area by the photographing unit in a state where the test image is projected.   When the detection unit detects a plurality of line segments as an object, an input from a user interface for designating a line segment used for control for attenuating the brightness of the projection image is received from the plurality of line segments. The display control apparatus according to claim 1, further comprising a reception unit.   When the detection means detects the first line segment and the second line segment as objects, the control means determines the brightness of the projection image based on the position of the first line segment that is a thicker line segment. The display control apparatus according to claim 1, wherein control for attenuation is performed.   When the detection unit detects the first line segment and the second line segment as objects, the control unit detects the projection image based on the position of the first line segment that is a darker color line segment. The display control apparatus according to claim 1, wherein control for attenuating luminance is performed.   The apparatus according to claim 1, further comprising a changing unit that changes at least one projection region of the plurality of projectors so that the overlapping region is expanded according to the position of the object detected by the detection unit. The display control apparatus according to any one of 8. Display control means for displaying the position of the object detected by the detection means on a display;
Receiving means for receiving an input from a user interface for correcting the position displayed on the display;
The said control means performs control for attenuating the brightness | luminance of the said projection image according to the position corrected according to the input from the said user interface, The any one of Claims 1 thru | or 9 characterized by the above-mentioned. The display control apparatus described. A display control method performed by a display control device that controls a plurality of projectors whose projection areas partially overlap,
A detection step of detecting an object from a projection area of the plurality of projectors;
And a control step of controlling brightness of projection images corresponding to overlapping regions of the projection regions of the plurality of projectors based on the positions of the objects detected by the detection step.   In the control step, the change in the brightness attenuation amount of the projection image corresponding to the specific area according to the position of the object is controlled to be larger than the change in the brightness attenuation amount of the projection image in the non-specific area. The display control method according to claim 11. A photographing step of photographing projection areas of the plurality of projectors;
The display control method according to claim 11, wherein the detection step detects the object using a captured image of the projection area obtained by the imaging step. A test control step of projecting a test image to each of the plurality of projectors;
The display control method according to claim 13, wherein the detecting step detects the object by using a captured image of the projection area obtained by the capturing step in a state where the test image is projected.   The program for operating a computer as a display control apparatus of any one of Claims 1 thru | or 10.

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