JP5386828B2 - Image projection system and program - Google Patents

Description

Image correction processing based on the manual operation relates executable images projection system and program.

2. Description of the Related Art Conventionally, there has been known a projector that detects an elevation angle change (decline change) of a projector with respect to a screen using an acceleration sensor or the like, and automatically executes keystone distortion correction (trapezoidal distortion correction) based on the detection result (for example, Patent Document 1). On the other hand, as a method of manually performing the keystone distortion correction, a dedicated OSD (On Screen Display) is displayed on the screen, and the distortion is corrected by operating the operation panel mounted on the main body of the apparatus or the up / down / left / right keys of the remote control. There are known methods for specifying a location to be corrected and a correction amount. Even in a projector equipped with an automatic execution function for keystone distortion correction, it is difficult to correct a trapezoidal image into a complete regular rectangular image, so a manual setting function for finely adjusting the image shape is indispensable.
JP 2001-339671 A

  However, when manually correcting keystone distortion, the trapezoidal shape is corrected to a rectangle by operating the up / down / left / right keys as described above, so the relationship between which key is pressed and how it is corrected is thought of. It ’s hard. In addition, in this type of projector, the amount of correction changes according to the length of time each key is pressed, but this relationship is also difficult for beginners to understand. As described above, the conventional operation method in the case where the keystone distortion correction is manually performed cannot perform an intuitive operation, and the user may feel stress.

In view of the above problems, and an object thereof is to provide a manually projected image image operability obtained that images the projection system and a program to improve when the correction performing the.

An image projection system according to the present invention is an image projection system including a projector and a computer, and the projector stores page information including web page information including an imaging unit that captures a projected image projected on a screen and a setting screen. A storage unit, a page information distribution unit that distributes web page information reflecting the imaging result of the imaging unit to the setting screen to a computer via a network, a correction information acquisition unit that acquires correction information transmitted from the computer, An image correction unit for correcting the shape of the projected image based on the correction information, and the computer displays an image image having substantially the same shape as the projected image on the setting screen based on the web page information distributed from the projector. The display unit to be operated and the driver for each side or each corner constituting the image displayed on the setting screen An input unit that changes the shape of the image image by performing a switching operation, a correction information transmission unit that transmits correction information that is a coordinate change amount of each corner of the image image by the input unit to the projector via a network, It is provided with.
In the image projection system, the projector includes an imaging unit and an image correction unit, and includes an image projection unit for projecting a projection image on a screen, and a web server unit for delivering web page information. The web server unit includes a page information storage unit, a page information distribution unit, a correction information acquisition unit, a control signal generation unit that generates a control signal for controlling the image projection unit based on the acquired correction information, and a generation And a control signal supply unit that supplies the control signal to the image projection unit.
A program according to the present invention causes a computer to function as each unit of a projector or a computer in the above-described image projection system.
The following configuration may be used.
The projector of the present invention is a projector connectable via a network, and includes an image projection unit for projecting a projection image on a screen, and a web server unit for delivering web page information. The server unit stores a page information storage unit that stores web page information including a setting screen for performing image correction of the projected image, and page information distribution that distributes the web page information read from the page information storage unit via the network. A correction information acquisition unit that acquires correction information that is an input result to the setting screen via a network, and a control signal that generates a control signal for controlling the image projection unit based on the acquired correction information And a control signal supply unit that supplies the generated control signal to the image projection unit.

  An image projection system of the present invention is an image projection system in which a projector that projects a projection image on a screen and a computer are connected to a network, and the projector performs image correction of the projection image on the computer via the network. A page information distribution unit that distributes web page information including a setting screen for performing, a correction information acquisition unit that acquires correction information that is an input result to the setting screen via a network from a computer, and the acquired correction information And an image correction unit that performs image correction of the projected image, and the computer displays a setting screen based on the page information receiving unit that receives the web page information from the projector via the network and the web page information. Display section, input section for inputting information on the setting screen, and input result by the input section Some correction information, characterized by comprising a correction information transmitting unit for transmitting to the projector via the network.

  These projectors and image projection systems are configured to perform image correction of projected images by operating a device (computer) connected to the projector and a network (inputting information to a setting screen displayed on the computer). In general, an input device such as a keyboard or a mouse that is generally installed can be used, so that the operability is better than when an operation panel or a remote control is used. Further, since the projector functions as a web server and can deliver web page information including a setting screen to a computer functioning as a web client, an application for performing image correction is installed in the computer in advance. And so on, and even if the computer is in a state where it is impossible to connect to the Internet, the operation can be performed without any trouble.

  In the projector described above, the image projection unit includes an image correction unit that performs image correction of the projection image based on the control signal supplied from the web server unit, and the image correction unit performs image correction based on the control signal. Is not executable, the uncorrectable signal is output to the web server unit, and when the uncorrectable signal is input from the image projection unit, the web server unit outputs error information indicating that to the page information distribution unit. It is preferable to transmit via a network.

  According to this configuration, when the image projection unit receives an input result (correction information) to the setting screen by the computer and determines that image correction cannot be performed based on the control signal generated by the web server unit, the computer Since the error information is transmitted via the web server unit, the user operating the computer can grasp that the image correction based on the input content cannot be executed. As a result, useless operations such as repeated information input can be eliminated by not performing image correction (not reflected in the projected image), which is convenient.

  In the projector described above, the image projection unit further includes an imaging unit that captures a projection image, the imaging unit outputs an imaging result of the projection image to the web server unit, and the web server unit receives from the image projection unit. When the imaging result is input, it is preferable that the page information distribution unit generates update information to be reflected on the setting screen based on the imaging result, and transmits the update information via the network.

  In the projector described above, the image correction unit can perform keystone distortion correction, and the update information is information for displaying an image image imitating the shape of the projection image captured by the imaging unit on the setting screen. It is preferable that

According to these configurations, the web server unit acquires the imaging result of the projection image captured by the image projection unit, generates update information to be reflected on the setting screen, and transmits the update information to the computer. Therefore, the imaging result of the projected image can be used for the image correction operation. For example, when performing keystone distortion correction as image correction, an image image imitating the shape of the captured projection image is displayed on the setting screen. Therefore, while checking the shape (checking the actual projection image) None), keystone distortion correction can be performed. In this way, the imaging result of the projected image is reflected on the setting screen, so that image correction can be performed even when the projector and the computer are separated from each other, and the operability of the image correction operation is further improved. be able to.
In addition, when enlarging / reducing a part or the whole of the projection image as image correction, information on the part or the whole image size of the captured projection image is transmitted to the computer as update information, and the projection on the screen is performed. When changing the position of the image, it is preferable to reflect the imaging result of the projected image on the setting screen also in other image correction functions such as transmitting information about the position of the captured projection image to the computer as update information. .

  In the projector described above, the correction information is preferably an input result obtained by deforming the shape of the image displayed on the setting screen by a drag operation on each side or each corner constituting the image. .

  According to this configuration, keystone distortion correction can be performed by a drag operation on each side or each corner of the image displayed on the setting screen. Thereby, the movement of each side and each corner, the length change of each side, and the angle change of each corner can be performed intuitively and easily.

  The program of the present invention is a program for causing a computer to function as each part of a projector or a computer in the above-described image projection system.

  By using this program, it is possible to construct an image projection system that can improve the operability when manually correcting the image of the projection image.

Hereinafter, with reference to the accompanying drawings, illustrating an embodiment of the present invention for engaging Ru images the projection system and program. FIG. 1 is a system configuration diagram of the image projection system SY. As shown in the figure, an image projection system SY includes a projector 10 that projects a projection image G on a screen SC by irradiating projection light, and a computer PC connected to the projector 10 via a network line NW. , Consisting of.

  The projector 10 can be remotely operated using the remote controller 40 and is equipped with a memory card 41 for storing image data and the like. The remote controller 40 is provided with a key group (not shown) such as up / down / left / right keys and a power key, and various image correction functions can be operated using the key group. In particular, when performing keystone distortion correction, it is possible to specify a distortion correction location and correction amount with the up / down / left / right keys. Further, the projector body is provided with a CCD camera 42 for capturing the projected image G, and the optical axis of the CCD camera 42 is substantially parallel to the optical axis of the projection optical system 360 (see FIG. 2). Is set to

  On the other hand, the computer PC is applicable to a general personal computer, and includes a device main body 50, a display 51, and an information input device 52. A network interface 69 for network connection is provided on the back of the apparatus main body 50, and a control unit 60 is incorporated in the apparatus main body. The control unit 60 includes a CPU (Central Processing Unit) 61, a ROM (Read Only Memory) 62, a RAM (Random Access Memory) 63, and an HDD (Hard Disk Drive) 64. As the information input device 52, a keyboard 66 and a mouse 67 are provided.

  With the above configuration, the projector 10 distributes the web page information including the setting screen D (see FIGS. 5 to 10) for performing the image correction of the projection image G to the computer PC via the network line NW. The computer PC displays the setting screen D on the display 51 and transmits correction information based on the input result input by the user operating the information input device 52 to the projector 10. The projector 10 receives the correction information, performs image correction of the projection image G, and returns update information based on the correction result (such as the imaging result by the CCD camera 42) to the projector 10. The projector 10 reflects the update information on the setting screen D as necessary.

  Next, the control configuration of the projector 10 will be described with reference to FIG. The projector 10 includes a web server unit 20 that mainly functions as a web server, and an image projection unit 30 that mainly performs a conventional projector function.

  The web server unit 20 temporarily stores a first CPU 200 that executes arithmetic processing of various programs including a viewer application, a first ROM 202 that stores each application and program executed by the first CPU 200, and a calculation result and data of the first CPU 200. And a first RAM 204 for storing the data. The first CPU 200 and the first ROM 202 are connected so as to be capable of unidirectional or bidirectional communication, and the first CPU 200 and the first RAM 204 are connected so as to be capable of bidirectional communication.

  The first ROM 202 includes a web application for distributing web page information to the computer PC in addition to the viewer application described above. The first CPU 200 reads and activates a web application from the first ROM 202 in accordance with a web page information delivery command from the computer PC functioning as a web client, and delivers designated web page information to the computer PC (web browser). .

  The web server unit 20 further includes a graphics controller 210 that generates image data based on a drawing command from the first CPU 200. The graphics controller 210 is connected to the first CPU 200 so as to be capable of bidirectional communication, and includes an LSI chip 211 for generating an image and a video memory (VRAM) 212 for storing the generated image.

  The web server unit 20 includes a network interface controller 220, an I / O port 230, a PCMCIA interface controller 240, and a USB controller 250 as interfaces for transmitting and receiving commands and data between the projector 10 and an external device. Have.

  The network interface controller 220 is a controller compliant with, for example, the Ethernet (registered trademark) standard, and converts commands and data transmitted from the web server unit 20 to the network line NW into an appropriate format according to a network communication protocol. The signal received from the network line NW is converted into a format suitable for processing in the web server unit 20. The I / O port 230 is a general input / output port, and is connected to the wireless input device 234 via the identification circuit 232 and to the second CPU 300 of the image projection unit 30. The wireless input device 234 is an input device for receiving input data transmitted from a wireless device such as the remote controller 40, and the identification circuit 232 directs the input data received by the wireless input device 234 to itself (projector 10). Whether the input data has been transmitted is identified.

  The PCMCIA interface controller 240 is a controller that transfers data from the web server unit 20 to the memory card 41 in accordance with the PCMCIA standard, and transfers data from the memory card 41 to the web server unit 20. The memory card 41 stores image data transferred from a data supply device (computer PC, an external input device 43 to be described later). The USB controller 250 is a controller that transfers data between the web server unit 20 and the external input device 43 in accordance with the USB standard, and is connected to the external input device 43 via, for example, the USBHUB 252.

  In addition to this, the web server unit 20 includes a real-time clock 260 that supplies absolute time, and a sound source 262 that generates sound data based on a command from the first CPU 200. The first CPU 200 and the controllers 210, 220, 240, 250, etc. in the web server unit 20 are connected to each other via a bus that transmits data and commands.

  On the other hand, the image projection unit 30 executes a predetermined program to control each circuit of the image projection unit 30, a second ROM 302 that stores a program to be executed by the second CPU 300, and a calculation result and data of the second CPU 300. 2nd RAM304 which stores temporarily. The second CPU 300 and the second ROM 302 are connected so as to be capable of unidirectional or bidirectional communication, and the second CPU 300 and the second RAM 304 are connected so as to be capable of bidirectional communication. In addition, the second CPU 300 and the first CPU 200 are connected to each other via an I / O port 230 so that bidirectional communication is possible, and data and commands can be transmitted and received between the first CPU 200 and the second CPU 300.

  The image projection unit 30 further includes a video signal conversion circuit 310, an audio control circuit 320, a liquid crystal (LCD) drive circuit 330, a light source drive circuit 340, a cooling fan control circuit 350, a projection optical system 360, and a CCD control circuit 370. ing.

  The video signal conversion circuit 310 realizes an analog-digital conversion function, a decoding function, a synchronization signal separation function, and an image processing function (an image correction function such as a keystone distortion correction process). Specifically, an analog video signal input from the external video signal input terminal 312 is converted into digital image data, and the converted digital image data is synchronized with a synchronization signal in a frame memory (not shown) in the video signal conversion circuit 310. ) And the digital image data written in the frame memory is read out from the frame memory. As the analog video signal, for example, an RGB signal output from a computer PC or the like, or a composite video signal output from a video tape recorder (not shown) or the like is input. When the analog video signal is a composite video signal, the video signal conversion circuit 310 demodulates the composite video signal and separates it into a component video signal and a synchronization signal composed of three color signals of RGB. Is converted into digital image data. When the analog video signal is an RGB signal, it is originally input as a component video signal and a synchronization signal is also input separately, so that no separation processing is necessary, and the video signal conversion circuit 310 converts the component video signal into a digital image. Convert to data. Further, the digital video signal transmitted from the graphics controller 210 of the web server unit 20 is also input to the video signal conversion circuit 310. In such a case, an analog-digital conversion process and a separation process are unnecessary because the synchronization signal is originally supplied as a digital video signal and supplied separately.

  The audio control circuit 320 is connected to the external audio signal input terminal 322, the speaker 324, the second CPU 300, and the sound source 262 of the web server unit 20. The audio control circuit 320 drives the speaker 324 with a drive signal generated based on an audio signal or sound data transmitted from the external audio signal input terminal 322 or the sound source 262 in accordance with a command from the second CPU 300.

  The LCD drive circuit 330 receives the image data processed by the video signal conversion circuit 310, drives the LCD 332 according to the received image data, and modulates the illumination light emitted from the light source 342. Illumination light modulated by the LCD 332 is projected onto a screen SC that is a projection surface via a projection optical system 360 including a lens. The light source driving circuit 340 controls ON / OFF of the light source 342 in accordance with a command from the second CPU 300. A cooling fan 352 for sending cooling air to the light source 342 is disposed on the back surface of the light source 342. A cooling fan control circuit 350 is connected to the cooling fan 352, and the cooling fan control circuit 350 controls the rotation speed of the cooling fan 352 according to a command from the second CPU 300.

  The CCD control circuit 370 generates and outputs a captured image of the CCD camera 42 that is an imaging camera. The captured image is output by the second CPU 300 to the web server unit 20 (first CPU 200) via the I / O port 230, and transmitted from the web server unit 20 to the computer PC as a part of web page information (update information). Is done. Note that the imaging camera may use another imaging device instead of the CCD camera 42.

  The captured image generated by the CCD control circuit 370 is also used when the keystone distortion correction process is automatically executed. For example, when the projector 10 performs the projection, if an image without distortion is formed on the LCD 332, the projection image G on the screen SC is distorted into a substantially trapezoidal shape. Therefore, when a captured image distorted in a substantially trapezoidal shape is generated, if an image distorted in a substantially trapezoidal shape (an inverse image of the projected image G projected on the screen SC) is formed on the LCD 332, the distortion is distorted on the screen SC. No image (rectangular image with the correct aspect ratio) can be projected. That is, the video signal conversion circuit 310 performs a process of generating corrected image data (automatic keystone distortion correction process) as one of image processing functions. The video signal conversion circuit 310 detects not only the imaging result of the CCD camera 42 but also the elevation angle change of the projector 10 by the acceleration sensor, and the keystone distortion correction process is automatically executed based on the detection result. good. Further, as described above, the video signal conversion circuit 310 can also perform keystone distortion correction processing based on information input to the setting screen D by the computer PC and manual operation of the remote controller 40.

  As can be understood from the configuration illustrated in FIG. 2, the projector 10 according to the present embodiment can project the projection image G according to the video signal supplied from the outside even when the web server unit 20 is not present (not mounted). Can be projected. That is, the web server unit 20 is configured to be arbitrarily detachable from the projector 10. In this case, the web server unit 20 preferably has a form mounted on one printed board. Thus, by making the web server unit 20 detachable from the projector 10, the projector having the function of the web server unit 20 and the projector not having the function of the web server unit 20 are mostly shared. Thus, the cost of the apparatus can be reduced.

  Here, a basic operation of the projector 10 having the above configuration will be described. A signal input to the projector 10 via the network line NW is converted into a format suitable for the web server unit 20 by the network interface controller 220 of the web server unit 20 and transferred to the first CPU 200 as data and commands. The first CPU 200 temporarily stores the transferred data in the first RAM 204 and determines whether the transferred command is a command for the web server unit 20 or a command for the image projection unit 30. When the transferred command is a command for the image projection unit 30, the first CPU 200 transfers the command to the second CPU 300 of the image projection unit 30 via the I / O port 230.

  On the other hand, when the transferred command is a command for the web server unit 20 (such as a command for designating web page information), the first CPU 200 executes arithmetic processing based on the transferred command. For example, when a data reproduction request (projection display request) is input from the remote control 40 or the like, the first CPU 200 reads an appropriate viewer to read (reproduce) data stored in the memory card 41 or the first RAM 204. The application is read from the first ROM 202 and activated, and user interface data of the stored data is generated and transferred to the graphics controller 210 together with a drawing command.

  The graphics controller 210 generates user interface image data (hereinafter simply referred to as “image data”) to be displayed based on user interface data or display screen data in accordance with the received drawing command. Are stored in the VRAM 212. Further, the graphics controller 210 reads out image data stored in the VRAM 212 of the graphics controller 210 at a predetermined timing in accordance with a command from the first CPU 200 and transfers it to the video signal conversion circuit 310 of the image projection unit 30. The first CPU 200 receives commands or data from the external input device 43 via the USBHUB 252 and the USB controller 250. The first CPU 200 stores the data stored in the first RAM 204 or the VRAM 212 of the graphics controller 210 via the PCMCIA interface controller 240 according to the command received via the external input device 43 or the network line NW. The stored image data is stored in the memory card 41.

  When the video signal conversion circuit 310 receives the image data from the graphics controller 210, the video signal conversion circuit 310 performs the above-described processing and transfers the processed image data to the LCD driving circuit 330. The LCD driving circuit 330 drives and controls the LCD 332 according to the received image data, and projects desired image data on the screen SC.

  For example, when the command transferred from the network line NW via the I / O port 230 instructs the second CPU 300 to turn on the light source 342, the second CPU 300 turns on the light source 342 via the light source driving circuit 340. The second CPU 300 controls the operating state (rotation speed, rotation timing, etc.) of the cooling fan 352 according to the temperature of the light source 342 via the cooling fan control circuit 350. Data transmission from the projector 10 to the network line NW is executed via the network interface controller 220 in accordance with a command from the first CPU 200.

  Next, functional configurations of the projector 10 and the computer PC will be described with reference to FIG. The web server unit 20 of the projector 10 includes a page information storage unit 121, a page information distribution unit 122, a correction information acquisition unit 123, a control signal generation unit 124, and a control signal supply unit 125 as main functional configurations. The image projection unit 30 of the projector 10 includes an imaging unit 126 and an image correction unit 127 as main functional configurations.

  The page information storage unit 121 stores web page information to be distributed to the computer PC via the network line NW, and the first ROM 202 is a main component. The web page information includes a setting screen D for performing image correction of the projection image G, and update information for displaying the imaging result of the CCD camera 42 or displaying an error on the setting screen D.

  The page information distribution unit 122 distributes the web page information read from the page information storage unit 121 to the computer PC via the network line NW, and includes the first CPU 200 and the network interface controller 220 as main components. . When the imaging result (captured image) of the CCD camera 42 is input from the image projection unit 30, the page information distribution unit 122 generates update information for reflecting the imaging result on the setting screen D, and the image projection unit When an uncorrectable signal indicating that image correction cannot be executed is input from 30, error information indicating that is generated and transmitted to the computer PC as part of the web page information.

  The correction information acquisition unit 123 acquires correction information that is an input result to the setting screen D from the computer PC, and includes the network interface controller 220 as a main component.

  The control signal generation unit 124 generates a control signal for controlling the image projection unit 30 based on the correction information acquired by the correction information acquisition unit 123, and includes the first CPU 200 and the graphics controller 210 as main components. And The control signal generation unit 124 includes a command conversion unit that converts correction information into a data string that can be analyzed by the image projection unit 30, and a correction value calculation unit that calculates a correction value (correction amount) as necessary. .

  The control signal supply unit 125 supplies the control signal generated by the control signal generation unit 124 to the second CPU 300 of the image projection unit 30, and includes the first CPU 200 and the I / O port 230 as main components.

  The imaging unit 126 captures the projection image G projected on the screen SC and outputs the imaging result to the web server unit 20. The imaging unit 126 includes the second CPU 300, the CCD camera 42, and the CCD control circuit 370 as main components. To do.

  The image correction unit 127 performs image correction of the projection image G based on the control signal supplied from the web server unit 20 and includes the second CPU 300 and the video signal conversion circuit 310 as main components. The image correction unit 127 outputs an uncorrectable signal to the web server unit 20 when the image correction based on the supplied control signal cannot be executed. For example, when there is a limit of plus / minus 20 ° in the vertical direction and plus / minus 20 ° in the horizontal direction in the keystone distortion correction, a control signal instructing the distortion correction exceeding these is supplied from the web server unit 20. In response to this, an uncorrectable signal is output.

  On the other hand, the computer PC includes a page information receiving unit 71, a display unit 72, an input unit 73, and a correction information transmitting unit 74 as main functional configurations.

  The page information receiving unit 71 receives web page information (including update information) from the projector 10, and has a network interface 69 (see FIG. 1) as a main component.

  The display unit 72 displays (updates) the setting screen D based on the web page information received by the page information receiving unit 71, and includes the control unit 60 and the display 51 as main components.

  The input unit 73 inputs information to the setting screen D, and the information input device 52 is a main component. The correction information is an input result of the input unit 73. For example, when causing the projector 10 to perform keystone distortion correction (manual), the input unit 73 performs an image operation by a drag operation on each side or each corner constituting the image image GA (see FIG. 8) imitating the projection image G. The keystone distortion correction operation of the projection image G is performed by changing the shape of the image GA.

  The correction information transmission unit 74 transmits correction information, which is an input result of the input unit 73, to the projector 10, and includes the control unit 60 and the network interface 69 as main components. The correction information may be transmitted periodically while the setting screen D is displayed on the display unit 72 or may be triggered by the input of predetermined information by the input unit 73. Further, when the correction amount for image correction exceeds a predetermined amount, correction information corresponding to the predetermined amount may be transmitted as needed.

  Next, a keystone distortion correction operation using the computer PC will be described with reference to the flowchart of FIG. The keystone distortion correction operation is a so-called “manual” operation that is executed by the projector 10 based on a user operation, and the keystone distortion correction processing (an imaging result of the CCD camera 42 or the like) This is different from the keystone distortion correction process that is automatically executed based on the detection result of the elevation angle change of the projector 10. In the figure, a broken line frame indicates a process based on a user operation, and a solid line frame indicates a process based on a computer operation.

  First, when a user inputs a URL (Uniform Resource Locator) corresponding to the web server unit 20 to the computer PC (S01), the computer PC acquires the corresponding web page information from the web server unit 20 (S02), The (main menu) screen D1 is displayed (S03, see FIG. 5). When the user selects the “projector setting” icon IA from among a plurality of selection icons displayed on the home page screen D1, the computer PC displays the projector setting menu screen D2 (S05, see FIG. 6). ). The URL assigned to each icon is specified by the user selecting an icon, and the corresponding web page information is acquired from the web server unit 20, but hereinafter, from selection of a selection item to acquisition of the web page information. Reference to the processing of is omitted.

  Subsequently, when the user selects the “advance setting” button B3 from the plurality of selection buttons displayed on the projector setting menu screen D2 (S06), the computer PC displays the altitude setting menu screen D3 (S07). FIG. 7). Further, when the user selects the “keystone distortion correction” button B31 from the plurality of selection buttons displayed on the altitude setting menu screen D3 (S08), the computer PC displays the keystone distortion correction setting screen D4. (S09, see FIG. 8).

  Here, when the user presses the “reflect imaging result” button BA on the keystone distortion correction setting screen D4 (S10), the computer PC is based on the imaging result of the projection image G from the projector 10 (web server unit 20). Update information is acquired (S11), and an image image GA simulating the projected image G is displayed on the keystone distortion correction setting screen D4 (S12, see FIG. 9). When the user performs a shape change operation on the image image GA (S13: Yes), the computer PC transmits correction information based on the shape change operation to the projector 10 (web server unit 20) ( S14). Here, when the correction amount of the image image GA exceeds a predetermined amount, it is determined that the shape change operation has been performed. When the user presses the “end” button BE on the keystone distortion correction setting screen D4 (S15: Yes), the keystone distortion correction operation is ended.

  Next, a specific example of the setting screen D displayed on the display 51 of the computer PC will be described with reference to FIGS. FIG. 5 is a diagram showing an example of a homepage (main menu) screen D1. As shown in the figure, on the home page screen D1, a “projector setting” icon IA, a “file utility” icon IB, a “marker activation” icon IC, and a “scenario playback activation” icon ID are displayed as selection items. That is, the computer PC can realize each function (projector setting, file utility setting, marker setting, and scenario playback) by selecting each icon, but here, a detailed description of functions other than “projector setting” Is omitted.

  FIG. 6 is a diagram illustrating an example of the projector setting menu screen D2 that is transitioned to when the “projector setting” icon IA is selected on the home page screen D1 illustrated in FIG. On the projector setting menu screen D2, “video” button B1, “audio” button B2, “altitude setting” button B3, “information” button B4, and “all initialization” button B5 are displayed as selection items. Here, it is assumed that the “altitude setting” button B3 is selected and the altitude setting menu screen D3 (see FIG. 7) is transitioned to.

  Although not particularly illustrated, when the “video” button B1 is selected on the projector setting menu screen D2, the video setting screen is displayed, and “brightness (brightness)”, “contrast”, “sharpness”, “ Settings such as “gamma correction”, “image quality”, “density of each color”, and “aspect ratio” can be made. When the “voice” button B2 is selected, a voice setting screen is displayed, and settings such as “volume”, “high tone strength”, and “low tone strength” can be made. When the “information” button B4 is selected, an information setting screen is displayed, and settings such as “lamp lighting time”, “video type”, and “resolution” can be made. Further, when the “all initialization” button B5 is selected, an initialization setting screen for setting the operation state of the projector 10 to the initial state is displayed. Note that these settings are transmitted as correction information to the web server unit 20 and reflected in the control of the image projection unit 30.

  FIG. 7 is a diagram illustrating an example of the altitude setting menu screen D3. On the altitude setting menu screen D3, a “keystone distortion correction” button B31, a “telewide” button B32, a “lens shift” button B33, and an “E-Zoom” button B34 are displayed as selection items. Here, it is assumed that the “keystone distortion correction” button B31 is selected, and a transition is made to the keystone distortion correction setting screen D4 (see FIG. 8).

  Although not particularly illustrated, when the “telewide” button B32 is selected on the altitude setting menu screen D3, the telewide setting screen is displayed, and an operation for enlarging / reducing the entire projected image G can be executed. When the “E-Zoom” button B34 is selected, an E-Zoom setting screen is displayed, and an operation for enlarging / reducing a part of the projection image G can be executed. When the “tele-wide” button B32 or the “E-Zoom” button B34 is selected, information about a part or the entire image size of the projection image G is transmitted between the computer PC and the projector 10 as correction information and update information. Send and receive. Further, when the “lens shift” button B33 is selected on the altitude setting menu screen D3, an operation for moving the position of the projection image G can be executed by displaying the lens shift setting screen. In this case, information regarding the position of the projection image G is transmitted and received between the computer PC and the projector 10 as correction information and update information.

  In addition, “installation environment setting (whether it is suspended from the ceiling, rear projection)”, “language setting”, “operation setting”, “network setting”, etc. are added as selection items on the altitude setting menu screen D3. Also good.

  FIG. 8 is a diagram illustrating an example of the keystone distortion correction setting screen D4. In the keystone distortion correction setting screen D4, an “imaging result reflection” button BA and an “end” button BE are displayed on the upper stage, and an imaging result display area 80 for displaying the imaging result of the CCD camera 42 on the lower stage. Is displayed. In the imaging result display area 80, an image image GA imitating the shape of the projection image G is displayed. In the example illustrated in FIG. 8, since the state before the “image pickup result reflection” button BA is pressed, a rectangular image image GA set as default is displayed.

  The image image GA is composed of four sides, a left side LL, a lower side LD, a right side LR, and an upper side LU, and a frame is formed at four corners, and double round vertex marks (handle marks) 81, 82, 83, 84 is displayed. Although details will be described later, by performing a drag operation on each side or each corner, the shape of the image image GA can be changed, and correction information based on the shape change is transmitted to the projector 10.

  As described above, since FIG. 8 shows a state before the “reflect imaging result” button BA is pressed, the shape of the projection image G actually displayed on the screen SC and the imaging result display area are shown. Although the shape of the image image GA displayed in 80 does not match, for example, when the vertex mark 81 at the upper left corner of the image image GA is dragged outward (inclined 45 ° upward), based on the correction information. Thus, the upper left corner of the projection image G moves outward (inclined 45 ° upward) (such image correction is performed by the image projection unit 30).

  On the other hand, FIG. 9 shows a case where the “reflect imaging result” button BA is pressed and update information based on the imaging result of the projection image G is reflected in the imaging result display area 80. The image image GA in this case is subjected to image processing so as to have substantially the same shape as that in which the user visually recognizes the projected image G on the screen SC. That is, even when the rectangular projection image G is projected on the screen SC, the captured image obtained by capturing the projection image G is not rectangular and is slightly distorted into a trapezoid. This is because although the optical axis of the lens of the CCD camera 42 and the optical axis of the projection optical system 360 (see FIG. 2) are set to be substantially parallel, they are not strictly parallel. is there. Therefore, the captured image generated by the CCD control circuit 370 so that the user can change the shape of the image image GA without feeling uncomfortable (so that the shape of the image image GA and the shape of the projection image G are substantially the same). After performing coordinate transformation and projective transformation on the image, the image image GA is displayed. The coordinate conversion and projective conversion may be performed on the projector 10 side or on the computer PC side.

  Here, the shape changing operation of the image image GA will be described with reference to FIGS. As shown in FIG. 11A, when the cursor (arrow) K is aligned with the vertex mark 83 at the lower right corner by the operation of the mouse 67 and dragged in the direction of the dotted line arrow, the vertex mark 83 is moved to the drag end position. (See vertex mark 83a). Accordingly, the arrangement angle and length of the lower side LD and the right side LR are changed (see the lower side LDa and the right side LRa). Thus, keystone distortion correction for correcting the trapezoidal shape to a rectangle can be realized by an intuitive and easy operation.

  Further, instead of operating the vertex marks 81, 82, 83, 84, each side LU, LD, LR, LU may be operated. As shown in FIG. 11B, when the cursor K is positioned to the right of the lower side LD and dragged in the direction of the dotted arrow (perpendicular to the lower side LD and outside the image image GA), the vertex mark 82 is moved to the left end. And the intersection of the line connecting the vertex mark 82 and the drag end position and the extended line of the right side LR can be changed to the lower side LDa having the right end. Accordingly, the position of the vertex mark 83 and the length of the right side LR are changed (see the vertex mark 83a and the right side LRa). In the case where the shape change operation of the image image GA shown in FIG. 11 is performed and each side LU, LD, LR, LU is operated, in order to perform keystone distortion correction of the projected image G (image In order to make the image GA a rectangle), it is necessary to operate two sides of the lower side LD and the right side LR.

  On the other hand, as shown in FIG. 12A, when the cursor K is positioned to the left of the lower side LD and dragged in the direction indicated by the dotted arrow (perpendicular to the lower side LD and outside the image image GA), the vertex mark 83 is obtained. Can be changed to the lower side LDa having the right end as the intersection of the line connecting the vertex mark 83 and the drag end position and the extended line of the left side LL. Accordingly, the position of the vertex mark 82 and the length of the left side LL are changed (see the vertex mark 82a and the left side LLa).

  Further, as shown in FIG. 12B, when the cursor K is aligned with the position near the center of the lower side LD and dragged in the direction of the dotted arrow (perpendicular to the lower side LD and outside the image image GA), the dragging ends. The lower side LD can be translated to the position. Accordingly, the positions of the vertex mark 82 and the vertex mark 83 and the lengths of the left side LL and the right side LR are changed (see the vertex mark 82a, the vertex mark 83a, the left side LLa, and the right side LRa).

  Thus, the arrangement position and length of the side can be changed according to the side where the cursor K is aligned and the dragging direction. Further, the side to be changed can be designated according to the position where the cursor K is aligned with the side (right side, left side, near the center).

  11 and 12 show only the case where the cursor K aligned with the lower side LD is moved in the right-angle direction, other sides may be operated, and the drag direction is also arbitrary. As for the drag direction, similarly to the vertex marks 81, 82, 83, 84, the arrangement position and length of the sides may be changed according to the angle, or whether the drag is performed toward the inside of the image image GA. Only when it is dragged toward the outside, if it is dragged toward the outside, regardless of the movement angle (even if it is not moved in the direction perpendicular to the side), FIG. The drag direction (angle) may be ignored so as to obtain the result of b).

  Thus, in this embodiment, the shape of the image image GA can be changed by a drag operation on each side or each corner, and the operation result is transmitted to the projector 10 as correction information. The projector 10 receives the correction information at the web server unit 20, converts it into a control signal that can be analyzed by the image projection unit 30, and supplies the control signal to the image projection unit 30. Here, when the image projection unit 30 determines that the image correction based on the control signal cannot be performed, the image projection unit 30 outputs an uncorrectable signal to the web server unit 20, and the web server unit 20 does so. Is sent to the computer PC.

  Here, the display based on the error information will be described with reference to FIG. As shown in the figure, when error information is transmitted from the web server unit 20, the computer PC sets an error display box BO indicating that no further adjustment is possible for the commanded image correction. The image is displayed superimposed on the imaging result display area 80 on the screen D.

  The error display box BO is provided with an “undo” button 91 and a “confirm” button 92. When the “undo” button 91 is pressed, the shape of the image image GA is changed. Return to the previous state. That is, for example, as shown in FIG. 11A, an operation of dragging the cursor K along the dotted arrow (an operation of moving the cursor K from the vertex mark 83 to the vertex mark 83a) is performed, and error information regarding the operation is performed. Is transmitted from the web server unit 20, the display of the image GA is returned to the state where the cursor K is positioned at the vertex mark 83 (the state indicated by the solid line in FIG. 11A). On the other hand, when the “confirm” button 92 is pressed, the state immediately before the error display is displayed. That is, in the example shown in FIG. 11A, the state where the cursor K is positioned at the vertex mark 83a is displayed. However, since the correction operation in this case is invalid (not reflected in the projection image G), it is preferable to notify the user by blinking the image image GA.

  Thus, by displaying the error display box BO, the user operating the computer PC can grasp that the image correction based on the input content cannot be executed. As a result, it is possible to eliminate useless operations such as repeating information input many times when image correction is not performed (not reflected in the projection image G), which is convenient. In the keystone distortion correction setting screen D4, when the “end” button BE is pressed by the user, a transition is made to the altitude setting menu screen D3 shown in FIG.

  As described above, the image projection system SY of the present embodiment is configured to perform image correction of the projection image G projected by the projector 10 by inputting information to the setting screen D displayed on the computer PC. Compared with the case where the remote controller 40 or the like is used, the operability is good. In addition, the projector 10 functions as a web server, and in order to distribute web page information for displaying the setting screen D to the computer PC functioning as a web client, an application for performing image correction on the computer PC is previously provided. The troublesomeness such as installation can be eliminated, and even if the computer PC cannot be connected to the Internet, the operation can be performed without any trouble.

  In addition, since the imaging result of the projection image G can be reflected on the setting screen D, even when the projector 10 and the computer PC are separated from each other (even when the actual projection image G cannot be confirmed), the image can be displayed on the computer PC side without any trouble. Correction can be performed and the operability of the image correction operation can be further improved. In particular, when performing keystone distortion correction, it is difficult to understand how the shape of the projected image G changes due to which key operation in the operation of the up / down / left / right arrow keys. Since the image image GA imitating the shape is displayed on the setting screen D, it can be operated intuitively and easily.

  When setting each image correction function (keystone distortion correction, tele-wide, lens shift, E-Zoom, etc.) shown in the above embodiment, the correction value of the projection image G itself is transmitted as correction information. Alternatively, the amount of change that changes due to information input on the setting screen D may be transmitted and converted into a correction value by the web server unit 20 to generate a control signal. That is, in the case of keystone distortion correction, a correction value (X ° upward, Y ° rightward, etc.) may be transmitted as correction information, and a change amount (coordinate change of four corners) may be transmitted. You may send it. However, in the case where the correction value itself is transmitted as the correction information, it is a condition that the imaging result of the projection image G is reflected in the image image GA (the “image capturing result reflection” button BA is pressed).

  The screen configuration, selection items, screen transition method, and image correction method of the setting screen D shown in the above embodiment are merely examples, and the present invention is not limited to this. For example, the captured image may be reflected in the imaging result display area 80 immediately after the transition to the keystone distortion correction setting screen D4 (without pressing the “reflection of imaging result” button BA). Instead of a drag operation on each side or each corner, a desired image may be directly drawn on the image image GA, and the coordinate deviation amounts of the four vertices may be transmitted to the projector 10 as correction information.

  Moreover, it is possible to provide each component of the projector 10 and computer PC shown in said embodiment as a program. Further, the program can be provided by being stored in various recording media (CD-ROM, flash memory, etc.). That is, a program for causing a computer to function as each unit of the projector 10 and the computer PC and a recording medium on which the program is recorded are also included in the scope of rights of the present invention.

  The projector 10 of the above embodiment employs a liquid crystal display method, but the display principle such as a CRT display method or a light switch display method (micromirror device method) does not matter. Other modifications can be made as appropriate without departing from the scope of the present invention.

1 is a system configuration diagram of an image projection system according to an embodiment of the present invention. It is a control block diagram of a projector. It is a functional block diagram of a projector and a computer. It is a flowchart which shows keystone distortion correction operation using a computer. It is a figure which shows an example (homepage) of a setting screen. It is a figure which shows an example (projector setting menu screen) of a setting screen. It is a figure which shows an example (altitude setting menu screen) of a setting screen. It is a figure which shows an example (keystone distortion correction setting screen) of a setting screen. It is a figure which shows an example at the time of reflecting an imaging result on a keystone distortion correction setting screen. It is a figure which shows shape change operation of an image. It is a figure which shows shape change operation of an image. It is a figure which shows an example at the time of displaying an error information box on a keystone distortion correction setting screen.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector 40 ... Remote control 42 ... CCD camera 52 ... Information input device 67 ... Mouse 81, 82, 83, 84 ... Vertex mark D ... Setting screen G ... Projection image GA ... Image image K ... Cursor LL, LD, LR, LU ... Image image side NW ... Network line PC ... Computer SC ... Screen SY ... Image projection system

Claims (3)

An image projection system comprising a projector and a computer,
The projector is
An imaging unit that captures a projected image projected on the screen;
A page information storage unit for storing web page information including a setting screen;
A page information distribution unit that distributes the web page information reflecting the imaging result of the imaging unit to the setting screen to the computer via a network;
A correction information acquisition unit for acquiring correction information transmitted from the computer;
An image correction unit that corrects the shape of the projection image based on the correction information ,
The computer
Based on the web page information distributed from the projector, a display unit that displays an image image having substantially the same shape as the projection image on the setting screen;
An input unit for changing the shape of the image image by performing a drag operation on each side or each corner constituting the image displayed on the setting screen;
An image projection system comprising: a correction information transmitting unit that transmits the correction information, which is a coordinate change amount of each corner of an image image by the input unit, to the projector via the network . The projector is
An image projecting unit for projecting the projected image on the screen , the image capturing unit and the image correcting unit ;
A web server unit for delivering the web page information,
The web server unit
The page information storage unit, the page information distribution unit, and the correction information acquisition unit;
A control signal generation unit that generates a control signal for controlling the image projection unit based on the acquired correction information;
The image projection system according to claim 1 , further comprising: a control signal supply unit that supplies the generated control signal to the image projection unit. A program for causing a computer to function as each part of the projector or each part of the computer in the image projection system according to claim 1 .

Images