JP2019095633A - Projector and multi-projection system - Google Patents

Abstract

To provide a projector capable of, when an optical shift is performed in multi-projection, shortening time to be spent on adjustment related therewith.SOLUTION: A projection device comprises: image input means for inputting an image; edge blend correction means for performing darkening correction of an edge section with respect to an input image; optical shift means for moving a projection position of the image; and image segmentation means for segmenting a part of the input image. When the optical shift is performed by the optical shift means, edge blend correction is performed in accordance with an optical shift direction and an optical shift amount, and image segmentation is performed on the basis of a result obtained by performing the edge blend correction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projector, and more particularly to edge blend adjustment control when an optical shift function of adjusting a projection position is operated.

  As a method of using a projector, a projection method (multi-projection) is known in which a single integrated image is formed by connecting projection images of a plurality of projectors. Generally, in order to connect a plurality of projected images, if not strictly aligned, a joint may be visually recognized in the integrated image, which may degrade the quality. For this purpose, a technique called edge blending is often used to make seams inconspicuous.

  Edge blending is a process of partially superimposing a plurality of projected images, and reducing the superimposed portion of each projection screen so that the superimposed regions become equal to the illuminance of the non-overlapped portion when the illuminance of each projected image is totaled. In multi-projection, each projector forms a single integrated image by displaying partial images, but there are various transmission methods of the image data, for example, a method of distributing from a distributor to each projector, or in a projector Methods to complete the image exchange.

  The former is realized by a method of generating an image taking account of the above-mentioned edge blend area in advance by an image distributor and distributing it to each projector. The latter is generally realized by a projector (master projector) that controls the entire system, and a method in which the master projector generates partial images and distributes them to other projectors (slave projectors).

  In the latter method, the master projector distributes the trimmed image to the corresponding slave projector according to each component of the integrated image, and the master projector distributes the original image to the slave projector, and the slave projector trims it. There is a way to do the processing.

  In addition, when constructing a multi-projection system, the trapezoidal correction and edge blend area adjustment of each projector due to the installation environment, the optical shift to change the projection display position by shifting the optical system, the projection position and size adjustment by optical zoom etc. It is assumed to be done. These adjustments are closely related, and it is often the case that adjustments are made if the adjustment items are repeatedly sent back and forth in order to establish the adjustment, so that the adjustment work can be saved and the adjustment time can be shortened. A mechanism is required.

  In Patent Document 1, a method is disclosed in which the magnification ratio is distributed to each projector when the projection image enlargement operation is performed in multi-projection, and each projector automatically performs image enlargement processing and image clipping based on the information. It is disclosed in reference 1.

  In general, the enlargement instruction is a function provided to each projector, and the user can individually adjust and cut out the image for each of the projectors to realize enlargement of the integrated image, which is disclosed in Patent Document 1 By using the method, individual enlargement operation / cutout is omitted.

JP, 2008-70397, A

  As an adjustment when constructing a multi-projection, an optical shift may be performed to adjust a projection position by shifting an optical system as described above. This is used for adjustment of the projection position on the projection screen, readjustment of the overlapping area width by edge blending, and the like.

  The latter readjustment of the overlapping area width by optical shift is performed after the integrated image is sampled on the image once subjected to the edge blending process, so if the amount of overlap changes, the readjustment of the edge blending area also becomes necessary. There is a case. Furthermore, it is also assumed that each projector needs the clipping process of the suitable image after edge blend area readjustment.

  As the number of projectors constituting the multi-projection system increases, the number of times of optical shift and readjustment of the edge blend area may increase, which results in an increase in system construction / adjustment time.

  In view of this situation, it is an object of the present invention to provide a projector capable of shortening the time required for adjustment when an optical shift is performed in multi-projection where edge blending is performed. is there.

A projector according to the present invention for achieving the above object comprises an image input means for inputting image information, a shift means for moving a projection position of an image, an edge blend correction means for edge blend correction of an image, and a part of an image. An image cutout unit for cutting out
When the shift is performed by the shift means, edge blend correction is performed according to the shift direction and the shift amount, and image clipping is performed based on the result of performing the edge blend correction.

  According to the present invention, operations such as readjustment of the amount of edge blending and clipping instruction which occur with display position adjustment by optical shift in multi-projection can be automated, and adjustment time can be shortened.

FIG. 2 is a diagram showing an internal block configuration of a projector in the present invention. FIG. 2 is a view showing the appearance of multi-projection in Embodiment 1. FIG. 6 is a diagram showing a processing procedure when performing multi-projection in Embodiment 1. The figure which shows the table of the information regarding multi-projection, and a projection coordinate. FIG. 2 is a view showing a projection image in Example 1; FIG. 7 is a diagram showing a processing procedure when optical shift is performed in the first embodiment. FIG. 6 is a view showing an example of an optical shift adjustment menu in the first embodiment.

  Hereinafter, embodiments of the present invention will be described in detail. The embodiment described below is an example for realizing the present invention, and should be appropriately corrected or changed according to the configuration of the apparatus to which the present invention is applied and various conditions. It is not limited to the embodiment of the invention. Moreover, you may comprise combining suitably one part of each embodiment mentioned later.

Example 1
In this embodiment, a projector incorporating a liquid crystal panel will be described as an example.

<Overview of Projector>
FIG. 1 is a diagram showing the main configuration of the projector of the present embodiment. 100 is a projector main body. Reference numeral 101 denotes a control unit for controlling each block of the projector. The control unit 101 is bus-connected to each of the other blocks as shown in FIG. 1, and can perform access such as control instruction and data exchange to each block. An operation unit 102 receives an operation from a user. A power supply unit 103 controls power supply to each block of the projector.

  Reference numeral 104 denotes a liquid crystal unit, which includes a liquid crystal panel, three liquid crystal panels, and the like, and forms an image on the liquid crystal panel. Reference numeral 105 denotes a liquid crystal drive unit for forming an image on the liquid crystal panel of the liquid crystal unit 104 based on the input image signal. A light source 106 supplies light to the liquid crystal unit 104. A projection optical system 107 projects an optical image obtained by supplying light emitted from the light source 106 to the liquid crystal unit 104 on a screen (not shown). Reference numeral 108 denotes a light source control unit 108 for controlling the light amount of the light source 106 and the like.

  Also, 109 controls operations such as the zoom lens and the focus lens of the projection optical system 107, and controls for adjusting the projection area of the image by moving the projection optical system and adjusting the zoom magnification and the focus adjustment (hereinafter referred to as optical Optical system control unit 109 that performs shift). The optical shift is controlled based on an instruction from the user regarding the moving direction and the moving amount, and the moving direction can be adjusted up and down, left and right, and the moving amount can be adjusted in units of one pixel.

  An analog input unit 110 receives analog video signals from a PC, a DVD player, a television tuner, and the like, and includes an RGB terminal, an S terminal, and the like. An A / D conversion unit 111 converts a video signal obtained by the analog input unit into a digital signal. In addition to conversion, the A / D converter 111 can perform various settings related to the measurement of the timing and polarity of the received analog video signal, A / D conversion processing, and can perform A / D conversion based on the settings. It is.

  A / D conversion methods include double integration types that integrate an analog input voltage for a fixed time, parallel comparison types that use a comparator, sequential comparison types that compare with D / A conversion values, etc. Absent. A digital input unit 112 receives a digital video signal from a PC, a DVD player, or the like, and includes an HDMI (registered trademark) terminal or the like. In the case of the HDMI (registered trademark) terminal, a control signal may be simultaneously transmitted from the outside, and in this case, control of an image or the like may be performed. Reference numeral 113 denotes a USB interface that receives files of various information data such as video data, image data, and video files from the outside, or writes the files to the outside.

  Also, a pointing device, a keyboard, a USB flash memory, etc. may be connected. Reference numeral 114 denotes a card interface for reading and writing various information data files such as video data, image data, and video files from a card type recording medium, and an SD card, compact flash (registered trademark), etc. can be inserted. ing. A communication unit 115 transmits and receives an intranet, files of various information data such as video data, image data, video files and the like from the Internet, and other instruction signals. The communication unit 115 includes, for example, a wired LAN and a wireless LAN.

  An internal memory 116 stores files of various information data such as video data, image data, video files, etc., and is constituted by a semiconductor memory, a hard disk or the like.

  For example, a document file input from the card interface 114 is reproduced by the file reproduction unit 132. Then, the file reproduction unit 132 generates an image signal for posting to the user from the document file, and outputs the image signal to the image processing unit 117. Further, the video signal and the image signal input from the digital input unit 112 are directly transmitted to the image processing unit 117.

  The image processing unit 117 performs correction and analysis suitable for display on the liquid crystal unit 104 on the interface, the image signal obtained by the file reproducing unit 132, the video signal obtained by the control unit 101, and the like. For example, the number of pixels of the image signal is converted according to the number of pixels of the liquid crystal panel, and the number of frames of the input video signal is doubled for AC drive of the liquid crystal panel, and correction suitable for image formation by the liquid crystal panel is performed. . By the way, the AC drive of the liquid crystal panel is a method of alternately switching the direction of the voltage applied to the liquid crystal of the liquid crystal panel, and the liquid crystal panel generates an image whether the voltage applied to the liquid crystal is positive or reverse. It uses what it can do.

  At this time, since it is necessary to send the image for the forward direction and the image for the reverse direction one by one to the liquid crystal drive unit 105, the image processing unit 117 doubles the number of frames of the video signal. Do. The liquid crystal drive unit 105 forms an image on the liquid crystal panel of the liquid crystal unit 104 based on the image signal obtained by the image processing unit 117. Furthermore, the image processing unit 117 can perform various analysis on the video signal with respect to the digital signal converted by the A / D conversion unit 111. For example, the analog video signal input to the analog input unit 110 may not have a DE (Data Enable) signal indicating a display start position.

  Therefore, the display start position is measured based on the horizontal / vertical sync signal and the video data signal, and the control unit 101 controls image processing based on the analysis result or A / D conversion to the A / D conversion unit 111. Etc via the bus. The A / D converter 111 can also determine the polarity of the input synchronization signal, and holds the determination result in an internal register.

  Further, the image processing unit 117 projects an image in an oblique direction to the screen, and deforms the shape of the image so as to cancel the trapezoidal distortion with respect to the projection image when the projection screen is distorted in, for example, a trapezoidal shape. It also performs keystone correction. When performing keystone correction, the horizontal and / or vertical enlargement / reduction ratio of the image displayed on the liquid crystal panel is changed.

  In this way, the trapezoidal distortion of the projection screen and the distortion of the image area on the display element are offset, and the screen is displayed so as to approach a rectangular image display area of a normal aspect ratio. The keystone correction may operate automatically based on an inclination angle obtained by an inclination sensor 118 described later, or may be operated by the user operating the operation unit 102 or the like.

  A tilt sensor 118 detects the tilt of the projector 100. A timer 119 detects the operation time of the projector 100, the operation time of each block, and the like. A thermometer 120 measures the temperature of the light source 106 of the projector, the temperature of the liquid crystal unit 104, the outside air temperature, and the like.

  Reference numerals 121 and 122 denote infrared receiving units that receive infrared light from a remote controller attached to the projector 100 and other devices and send a signal to the control unit 101, and are installed, for example, at multiple locations in the front-rear direction of the projector. In the present embodiment, the infrared ray receiving unit 121 is disposed behind the projector body, and the infrared ray receiving unit 122 is disposed in front of the projector body.

  A focus detection unit 123 detects a distance between the projector 100 and a screen (not shown) and detects a focal length. An imaging unit 124 captures an image of the direction of the screen (not shown). Reference numeral 125 denotes a screen photometry unit that measures the amount and brightness of light reflected by the screen. Reference numeral 127 denotes a light source photometry unit which measures the light quantity and the luminance of light emitted from the light source.

  Reference numeral 133 denotes a display unit which is disposed in the main body of the projector 100 and displays the state of the projector, a warning, and the like. A display control unit 128 controls the display unit 133.

  A battery 129 supplies power when the projector 100 is carried and used, for example. Reference numeral 130 denotes a power supply input unit that receives AC power from the outside, rectifies it to a predetermined voltage, and supplies the rectified power to the power supply unit 103. Reference numeral 131 denotes a cooling unit for cooling, for example, by releasing the heat in the projector 100 to the outside, and includes, for example, a heat sink and a fan. Reference numeral 134 denotes a RAM, which is used for expansion of a program stored in the internal memory 116, a frame memory of a projected image, and the like.

<Description of the normal operation of the projector>
Here, the normal operation of the projector 100 will be described. The control unit 101 of the projector according to the present embodiment instructs the power supply unit 103 to supply power to each block by instructing the power on by the operation unit 102, and puts each block in a standby state. Then, after the power is turned on, the control unit 101 instructs the light source control unit 108 to start light emission from the light source 106.

  Next, the control unit 101 instructs the optical system control unit 109 to adjust the projection optical system 107 from the focus information and the like obtained by the focus detection unit 123. The optical system control unit 109 operates the zoom lens and the focus lens of the projection optical system 107 to control so that the projection light forms an image on the screen screen.

  In this way, the projection is ready. Next, for example, the image signal input to the digital input unit 112 is converted into a resolution suitable for the liquid crystal unit 104 by the image processing unit 117, and gamma correction, correction for uneven luminance, and keystone correction are added. . The image signal corrected by the image processing unit 117 is formed as an image on the liquid crystal unit 104 by the liquid crystal drive unit 105.

  Further, when adjusting the projection position to a desired position on the screen, it can be realized by moving the optical axis by optically shifting the projection optical system 107.

  Specifically, when the control unit 101 receives an instruction for moving direction and movement direction information by the user via the operation unit 102 or the like, it issues an instruction to the optical system control unit 109 based on the information, and the optical system control unit 109 instructs Control the projection optical system based on The image formed on the liquid crystal panel of the liquid crystal unit 104 is guided to the projection optical system 107 by the light emitted from the light source 106, and the projection optical system 107 projects the image on a screen (not shown).

  During projection, the control unit 101 detects the temperature of the light source 106 and the like by the thermometer 120, and operates and cools the cooling unit 131 when, for example, the temperature of the light source reaches 40 degrees or more.

  Then, when an instruction to turn off the power is issued by the operation unit 102, the control unit 101 performs communication to perform end processing on each block. Then, when preparation for termination is completed, the power supply unit 103 sequentially terminates power supply to each block. The cooling unit 131 operates for a while after the power is turned off, and cools the projector.

<Description of characteristic operation of this case>
The processing method when the optical shift adjustment in the multi-projection state in this embodiment is performed will be described below.

  First, based on FIG. 2 and FIG. 3, the basic processing order when performing multi-projection will be described.

  FIG. 2 is an external view showing a state in which multi-projection is performed by two projectors. In FIG. 2, the system comprises two units of a master projector 100 and a slave projector 200, which are arranged side by side, respectively, and edge blending is applied to the end of the image and then the end is superimposed and projected. Has been done.

  The projection plane 300 is a projection area of the master projector 100, the projection plane 400 is a projection area of the slave projector 200, and the projection area 500 is an area where the projection areas of the respective projectors are superimposed.

  It is assumed that each communication channel is established by a wireless LAN or the like, and that any information can be exchanged at any timing.

  Here, the connection method is not limited to the wireless LAN, and any means or method may be used as long as it is a communication path that can communicate even if it is wired.

  FIGS. 3A and 3B are diagrams showing the processing procedure of the master projector 100 and the processing procedure of the slave projector 200 when performing multi-projection, respectively.

  As a premise, in the multi-projection system shown in this embodiment, a USB memory (not shown) recording a projection image is connected to the USB I / F 113 of the master projector 100, and distributed to each projector constituting multi-projection. Shall be The panel resolution of each projector is 1920 × 1200, and the projection image used here is 3240 × 1200.

  The processing procedure of the master projector 100 will be described below based on FIG. 3 (a).

  First, in step S101, the master projector reads out the projection image from the USB memory connected to the USB I / F 113 of the own device according to the instruction of the control unit 101 based on the user's instruction.

  FIG. 4A is a table 700 showing information on projectors constituting a multi-projection. A projector name 701, an IP address 702, a projection position 703, an edge blend amount 704, and an edge blend position 705 are input and set to the master projector 100 through the operation unit 102 by the user setting operation.

  In response to the input / setting, the control unit 101 holds the information in the RAM 134 and distributes the information to each slave projector via the communication unit 115. The projection position 703 is alphanumeric projection position information determined according to the projection coordinates 800 shown in FIG. 4 (b). A projection coordinate 800 is a diagram representing a projection screen with a two-dimensional axis, and the coordinate position is indicated by numbers in the vertical direction and alphabets in the horizontal direction.

  Since the multi-projection in the present embodiment is configured of two units and installed side by side, the projection position 703 of the table 700 is information with the master projector 100 (1, A) and the slave projector 200 (1, B). Will be held by

  The edge blending amount 704 indicates the edge blending amount set in the corresponding device, and is recorded in pixel units. The edge blend position 705 is information indicating the direction of the side on which the edge blend correction is performed among the four sides of the projection image of the corresponding device.

  Next, in step S102, the master projector 100 distributes the image read out to the RAM 134 to the projector other than the apparatus held in the table 700 via the communication unit 115 to the RAM 134 through the communication unit 115. Do. Here, it is distributed to the slave projector 200.

  Next, in S103, the master projector 100 reads out the projection position information of its own device from the RAM 134. From the above-described table 700, since the configuration of two units arranged side by side is recorded, the information (1, A) is read out here.

  Next, in step S104, the master projector 100 reads the edge blend amount 704 and edge blend position 705 shown in the above-mentioned table 700 from the RAM 134 in order to obtain the edge blend amount and position of the own device.

  In the present embodiment, as shown in FIG. 5A, multi-projection is performed in a state of being superimposed by 200 pixels, and in S104, information indicating the edge blending amount of 200 pixels and the edge blending position to the right is read.

  Next, with respect to the projection image read out from the USB memory in S105, a region including the region in charge of the own apparatus and the edge blend region is cut out. The extraction procedure will be described below.

  First, the projection image is divided based on the layout of each projector that performs multi-projection. The layout can be determined from the projection position 703 of the table 700. Here, since they are horizontally arranged, they are divided into two on the left and right. The control unit 101 determines that (1, A) and (1, B) are horizontally arranged.

  Next, the process of determining the cutout position will be described. The position divided into two corresponds to the center of the projection image, and an area of 200 pixels in total of 100 pixels to the left and right with respect to the line segment is an edge blend area. Therefore, clipping is performed at a position obtained by taking half the value of the edge blending amount 704 from the center position divided into two.

  First, the control unit 101 reads out the edge blend amount in the table 700 held in the RAM 134 and performs arithmetic processing of dividing by half to obtain a value of 100 pixels. The control unit 101 cuts out the image at a position taken 100 pixels in the direction of the end portion which is set as the edge blend position from the position where the projection image held in the RAM 134 is divided into left and right.

  Project the cut-out projection image held on the RAM to a position where multi-projection is established by shifting the display position on the panel toward the end indicated by the edge blend position 705 based on the instruction of the control unit 101 I can do it.

  Next, in order to project the image processed by the image processing unit 117 in S106, the control unit 101 causes the liquid crystal drive unit 104 to form the processed image output from the image processing unit 117 in the liquid crystal unit 104. Control 105; The output image is projected onto the projection plane through the projection optical system 107 using the light source 106.

  Next, the processing procedure of the slave projector 200 will be described with reference to FIG. In S201, slave projector 200 waits for reception of the projection image from master projector 100 in S201. When the projection image is received, the control unit 101 expands the image information to the RAM 134 via the communication unit 115 in S202.

  Next, in the processing of S203 to S206, similarly to the processing procedure of S103 to S106, the projection responsible area of the own apparatus is cut out based on the projection responsible area of the own apparatus, the edge blending amount, and the edge blend position, and the cutout image is projected.

  Multi-projection can be performed by following the above processing procedure.

  Next, referring to FIGS. 6A and 6B, the processing procedure of each projector in the case of performing the optical shift adjustment in the state where the multi-projection by superposition of the edge blend unit 200 pixels is completed will be described.

  FIG. 6A shows the processing procedure of the master projector 100. As shown in FIG. First, in S301, the user issues an optical shift user instruction via the operation unit 102. Based on this instruction, the control unit 101 reads out the optical shift menu information from the internal memory 116 and instructs the image processing unit 117 to superimpose it on the image being projected.

  FIG. 7A shows an optical shift menu. The user can move the position of the projection image by shifting the projection optical system in the vertical and horizontal directions using the operation unit 102 or the remote control (not shown). Assuming that the operation method here is a remote controller or a cross key (not shown) of the operation unit 102 provided on the main body, it is possible to move with an accuracy of 1 pixel unit.

  Next, in step S302, the control unit 101 issues an instruction to the optical system control unit 109 based on a user instruction, and the optical system control unit 109 that has received the instruction performs shift control of the projection optical system 107. If the adjustment is completed in S303, the process proceeds to S304, and if the adjustment is continued, the process proceeds to S302. Here, for the adjustment completion, the fact that the optical shift menu shown in FIG. 7 is controlled so as not to be displayed is regarded as the adjustment completion.

  As shown in FIG. 5B based on the user's instruction, it is assumed that the projection position 300 of the master projector 100 is moved 400 pixels to the right according to the user's instruction, and the amount of optical shift is finally 600 pixels superimposed.

  At S304, control unit 101 detects the shift direction. As described above, since the rightward shift is made, the information of the right is detected here.

  Next, in S305, it is determined whether or not there is another projector constituting the multi-projection in the right direction.

  That is, the control unit 101 refers to the edge blend position 705 in the table 700 from the RAM 134 and determines whether or not the detected information matches the detected information.

  Here, since both are the right and coincide with the edge blend position 705, the process transitions to S306. In step S306, the control unit 101 transmits the shift direction and the shift amount to the slave projector 200 located in the optical shift direction via the communication unit 115. Since the projection position of the master projector 100 is (1, A), the alphabet in the right direction, which is the optical shift direction, is adjacent (1, B).

  Since the slave projector 200 corresponds to a projector positioned in the right direction, the information indicating the right which is the shift direction and the information indicating 400 pixels which is the shift amount are transmitted to the slave projector 200 from the control unit 101 via the communication unit 115 .

  Next, in S307, the edge blend area is readjusted based on the optical shift amount. Based on the information that the control unit 101 has moved to the right by 400 pixels, the control unit 101 instructs the image processing unit 117 to carry out an edge blending process of 600 pixels obtained by adding 400 pixels to the current 200 pixels.

  Next, in step S308, the image is re-cut out. The image for projection held in the RAM 134 is cut out at a position taken in the right direction by 300 pixels with an edge blend amount of 600 based on the procedure shown in S 105, and cut out from the RAM 134 to the image processing unit 117 Read out the later image and issue an instruction to perform edge blending.

  Next, in order to project the image processed by the image processing unit 117 in step S309, the control unit 101 causes the liquid crystal drive unit 104 to form the processed image output from the image processing unit 117 in the liquid crystal unit 104. Control 105; The output image is projected onto the projection plane through the projection optical system 107 using the light source 106, and the projection image subjected to the edge blending process in which the optical shift amount is added is projected from the master projector 100.

  Next, the processing procedure of the slave projector 200 will be described based on FIG.

  As shown in S401, the slave projector 200 transitions to a state of receiving information on optical shift from another projector after the start of multi-projection. Here, description will be made based on a case where information indicating that optical shift has been made in the right direction and information indicating an optical shift amount of 400 pixels have been received from the master projector 100. When the control unit 101 receives the above information via the communication unit 115, the control unit 101 makes a transition to S402 and changes the edge blend amount based on the received information.

  Here, since information is received from the master projector 100 (1, A) positioned on the right side as viewed from the slave projector 200, the edge blend amount of the opposing left end is changed to 600 pixels by adding 400 pixels. If the information indicating the shift direction in the vertical direction is received here, the process does not coincide with the edge blending direction of the own apparatus, and hence the subsequent processing may be interrupted.

  When the control unit 101 receives the information, the control unit 101 instructs the image processing unit 117 to carry out an edge blending process of 600 pixels in which 400 pixels are added to the current 200 pixels, for the input image. Next, at S404, the image is re-cut out. The image for projection stored in the RAM 134 is cut out at a position taken in the left direction by 300 pixels with an edge blending amount of 600 based on the procedure shown in S105, and cut out from the RAM 134 to the image processing unit 117 Read out the later image and issue an instruction to perform edge blending.

  Next, in order to project the image processed by the image processing unit 117 in step S309, the control unit 101 causes the liquid crystal drive unit 104 to form the processed image output from the image processing unit 117 in the liquid crystal unit 104. Control 105; The output image is projected onto the projection plane through the projection optical system 107 using the light source 106, and the projection image subjected to the edge blending processing in consideration of the optical shift amount is projected from the slave projector 200.

  FIG. 5B is a diagram showing the state of multi-projection after the amount of edge blending has been changed to 600 pixels.

  As described above, the information is distributed to the adjacent projectors according to the lens shift amount and the lens shift direction, the edge blend amount is changed in conjunction with it, and the image is recut out, thereby performing the edge blend simultaneously with the lens shift operation. It becomes possible to perform adjustment and re-cutout of an image collectively. In multi-projection, a use case of moving the entire integrated image is also assumed.

  In that case, as shown in FIG. 7B, a menu is provided for selecting whether to shift the entire integrated image or the projector alone, and switching of the entire or single shift may be performed according to the selection result. good. When the entire shift is selected by the user operation, the control unit 101 urges the user to perform the shift operation by superimposing the menu shown in FIG. 7A on the image being projected by the image processing unit 117.

  The control unit 101 reads out the information of the projector in the table 700 from the RAM 134, distributes the shift direction and shift amount inputted through the communication unit to each projector, and simultaneously moves to the optical system control unit 109 of the own device. The quantity is transmitted to shift the projection optical system 107. Similarly, each projector receiving the shift direction and the shift amount transmits the movement amount to the optical system control unit 109 according to the information to shift the projection optical system 107.

  This also makes it possible to co-exist the entire movement and the single shift.

  As mentioned above, although the preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100 master projector 101 control unit 102 operation unit 104 liquid crystal unit 105 liquid crystal drive unit 106 light source 107 projection optical system 108 light source control unit 109 optical system control unit 113 USB I / F
115 communication unit 116 internal memory 117 image processing unit 121 infrared receiving unit 122 infrared receiving unit 128 display control unit 133 display unit 134 RAM
200 slave projector 300 projection area 400 of master projector projection area 500 of slave projector overlap area 600 optical shift menu 700 table 701 projector name 702 IP address information 703 projection position information 704 edge blend amount information 705 edge blend position information 800 projection coordinates

Claims (4)

A projector,
Image input means for inputting an image;
Edge blend correction means for performing light reduction correction on the edge portion of the input image;
An optical shift means for moving the projection position of the image, and an image cutting means for cutting out a part of the input image;
Have
When the optical shift is performed by the optical shift unit, the edge blend correction is performed by the edge blend correction unit based on the optical shift amount, and the image cutout is performed by the image cutout unit based on the optical shift amount. To be a projector. Furthermore, an edge blend correction direction determination unit that determines whether the side to which the edge blend correction is applied is in the horizontal direction or the vertical direction;
Optical shift direction determination means for determining whether the movement direction by the optical shift is vertical or horizontal;
Only when the directions of the edge blend correction direction judging means and the judgment result by the optical shift direction judgment means coincide with each other, the edge blend correction means makes edge blend correction based on the optical shift amount and the optical shift amount by the optical shift means The projector according to claim 1, wherein the image clipping unit cuts out an image based on the image clipping unit. A multi-projection system comprising a master projector and one or more slave projectors, wherein
Said master projector is communication means for performing information communication;
Image input means for inputting an image;
Edge blend correction means for performing light reduction correction on the edge portion of the input image;
Optical shift means for moving the image projection position;
Clipping means for clipping out a part of the input image;
Have
The slave projector is
Communication means for performing information communication;
An image receiving means for receiving an image via the communication means; an edge blend correction means for performing a dimming correction on an edge portion of the received image;
Clipping means for clipping out part of the received image;
Have
When the master projector performs an optical shift by the optical shift means, performing edge blend correction on the input image based on the optical shift amount and transmitting the optical shift amount to the slave projector via the communication means Do,
The slave projector performs edge blending correction by the edge blending correction unit and clipping of the image by the image clipping unit on the received image based on the optical shift amount received through the master communication unit. Projection system. Furthermore, an edge blend correction direction determination unit that determines whether the side to which the edge blend correction is applied is in the horizontal direction or the vertical direction;
Optical shift direction determination means for determining whether the movement direction by the optical shift is vertical or horizontal;
Only when the directions of the edge blend correction direction judging means and the judgment result by the optical shift direction judgment means coincide with each other, the edge blend correction means makes edge blend correction based on the optical shift amount and the optical shift amount by the optical shift means 4. The multi-projection system according to claim 3, wherein the image cutout unit cuts out an image based on the image.