JP2011004244A - Image display system, image management device, image display, and program - Google Patents

Abstract

An image display system capable of processing an image displayed on a display device by an operation on the side of an image management device such as a digital camera while using a highly versatile communication standard.
An image display system includes a digital camera 200 as an image management device and a liquid crystal projector 100 as an image display device based on the PictBridge standard, which is a general-purpose standard for connecting an image management device and a printer. Connected with a USB cable. In this system, an image stored in a recording medium of the digital camera 200 is displayed on the liquid crystal projector 100 by operating the digital camera 200, and an image processing result input on the digital camera 200 is displayed on the image displayed on the liquid crystal projector 100. Also reflect.
[Selection] Figure 1

Description

  The present invention relates to an image display system, an image management apparatus, an image display apparatus, and a program. For example, the present invention relates to an image display system configured by connecting an image management apparatus such as a digital camera to an external display apparatus such as a projector.

  Images taken with a digital camera are recorded as digital data on a recording medium in the digital camera. The user reproduces the recorded image on the display means of the digital camera, rotates, enlarges, or reduces the displayed image, corrects the image parameters related to the lightness, darkness, and color of the image (hereinafter, processing of the display image). Can be).

  For example, as disclosed in Patent Document 1, a system for displaying a photographed image on an external display device without using a personal computer has been proposed. In the system disclosed in this document, a digital camera and a display device are connected wirelessly, and image data is transmitted from the camera side and displayed on the display device. In addition, the digital camera has a built-in position detection means using an acceleration sensor, analyzes the movement of the digital camera, and transmits the specific movement to the display device in response to a specific command related to enlargement, reduction, and movement. It is possible to trim the image displayed on the screen.

  However, the system disclosed in Patent Document 1 uses a unique communication protocol, and it cannot be realized unless both the digital camera and the display device conform to the communication protocol, and there is a problem that it lacks versatility. is there.

  Therefore, there is a general-purpose standard called PictBridge for connection between a digital camera and a printer, and many manufacturers' digital cameras and printers already have this standard.

JP 2003-051981 A

  Therefore, it is conceivable to directly connect the digital camera and the display device using a general-purpose protocol between the digital camera such as PictBridge and the printer. In this case, an operation that can be realized by operating the digital camera and an operation that can be realized by using a remote controller on the display device side may be mixed. Therefore, depending on the operation, the user must operate while holding the digital camera and the display device separately, and the operation may become complicated.

  An object of the present invention is to make it possible to process an image displayed on a display device by an operation on the side of an image management device such as a digital camera while using a highly versatile communication standard.

  In order to achieve the above object, an image display system according to claim 1 is a protocol for connecting an image management apparatus for storing image data and an image display apparatus for displaying image data to an image management apparatus and a printer. In the image display system configured to be directly connected using the image management device, the image management device selects image storage means for storing image data, and target image data from the image data stored in the image storage means An operation unit capable of performing a selection operation, an image processing operation on the selected image data, a management-side communication unit that establishes communication with the external device connected by the protocol, and a connected external device. Detection means for detecting whether or not the display device is an image display device, issuance means for issuing a print command, and the detection means detects a connection with the image display device A management-side control unit that controls the management-side communication unit to transmit the image data, the image processing command input by the image processing operation, and the print command to the image display device, An image display device controls display data for displaying image data, display-side communication means for establishing communication with the image management device using the protocol, and the management-side communication means to control image data and Display-side control means for receiving the command, and processing the image data received according to the image processing command received by the display-side communication means, and the image data received according to the received print command to the display means And image processing means for displaying.

  According to the present invention, an image displayed on a display device can be processed by an operation on the side of an image management device such as a digital camera while using a highly versatile communication standard. Thereby, it becomes possible to eliminate the complexity of the operation.

It is explanatory drawing which shows the communication protocol architecture of the image display system in embodiment of this invention. It is an external view which shows the connection form of a digital camera and a liquid crystal projector. It is a block diagram which shows the structure of a liquid crystal projector. It is a block diagram which shows the structure of a digital camera. It is a perspective view which shows the back surface of a digital camera. FIG. 5 is a sequence diagram showing negotiation between a liquid crystal projector and a digital camera. It is the flowchart which showed the operation | movement when a digital camera discriminate | determines a connection object apparatus. It is a list | wrist which shows the example of description of a command. It is a sequence diagram until image display is completed in the image playback mode. It is explanatory drawing which shows an example of the display screen of a liquid crystal projector. It is a perspective view which shows the back surface of a digital camera. It is a sequence diagram of a DPS command when an image rotation operation is performed in a digital camera. It is the flowchart which showed the image rotation process which a liquid crystal projector performs. The result which the liquid crystal projector performed the image rotation process is shown. It is a sequence diagram of a DPS command when a display image is enlarged. It is a list | wrist which shows the example of description of a command. It is the flowchart which showed the image expansion process which a liquid-crystal projector performs. The result which the liquid crystal projector performed the image expansion process is shown. FIG. 6 is a sequence diagram of a DPS command when an image parameter correction operation is performed. It is a list | wrist which shows the example of description of a command. It is the flowchart which showed the image parameter correction process which a liquid crystal projector performs. It is a sequence diagram of a DPS command when a DISP button is pressed. It is a list | wrist which shows the example of description of a command. The result which the liquid crystal projector performed the date display process is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, an image display system according to an embodiment of the present invention will be described, and subsequently, a configuration of a digital camera as an image management apparatus constituting the system and a liquid crystal projector as an image display apparatus will be described. Communication control between these devices will be described.

  FIG. 1 shows a communication protocol architecture of the image display system in the present embodiment. This system is configured by connecting a digital camera 200 and a liquid crystal projector 100 with a USB cable based on the PictBridge standard, which is a general-purpose standard for connecting an image management apparatus and a printer. In this system, an image stored in a recording medium of the digital camera 200 is displayed by the liquid crystal projector 100 by operating the digital camera 200. Further, the result of the image processing input on the digital camera 200 is reflected on the image displayed by the liquid crystal projector 100. In the PictBridge standard, USB is used as the physical layer, and PTP (Picture Transfer Protocol) is used as the communication protocol of the transport layer above it. On the PTP transport layer, a DPS (Digital Photo Solution for Imaging Device) layer is provided as a conversion layer, and a DPS application layer is provided thereon.

  In the USB interface, the digital camera 200 is a USB device, and the liquid crystal projector 100 operates as a USB host. The DPS architecture for realizing the PictBridge standard is a server / client model. As software components, there are a print server 501 and a print client 502, and a storage server 503 and a storage client 504. The print server 501 and the storage client 504 are prepared as a DPS application for the liquid crystal projector 100, and the print client 502 and the storage server 501 are prepared as a DPS application for the digital camera 200. In other words, by providing the liquid crystal projector 100 with the print server 501, the liquid crystal projector 100 can behave as a printer based on the PictBridge standard. Each DPS layer is provided with DPS discovery as a software component for establishing a connection with each other.

  In the DPS application, each DPS operation is basically completed in a sequence in which the server responds to a request from the client and returns the result to the client. Each DPS event is completed by a sequence in which the client responds to a notification issued from the server and returns a receipt confirmation to the server. Specifically, the print server 501 of the liquid crystal projector 100 responds in response to a print request from the print client 502 of the digital camera 200. Subsequently, the storage client 504 of the liquid crystal projector 100 requests image data in order to project an image, and the storage server 503 of the digital camera 200 transmits the image data. In response to a DPS event issuance notification such as a device status from the print server 501 of the liquid crystal projector 100, the print client 502 of the digital camera 200 returns a receipt confirmation of the DPS event.

  FIG. 2 is an external view showing a connection form between the digital camera and the liquid crystal projector in the present embodiment.

  The liquid crystal projector 100 is connected to the digital camera 200 via a USB cable 201 inserted into the USB interface 106. As will be described later, the digital camera 200 includes a recording medium as an image storage unit that stores captured image data, and also has a USB interface. The digital camera 200 conforms to the PictBridge standard, and when directly connected to a printer via a USB cable, image data selected by a selection operation from a captured image stored in a recording medium can be printed. . As shown in FIG. 2, the digital camera 200 has a function of projecting and displaying image data stored in a recording medium on the screen 119 when directly connected to the liquid crystal projector 100.

  FIG. 3 is a block diagram showing the configuration of the liquid crystal projector 100 in the present embodiment.

  The liquid crystal projector 100 includes a system control circuit (display-side control unit) 109 that controls the whole, and a memory 101 that temporarily stores constants, variables, images, and the like for operation of the system control circuit 109. Further, an electrically erasable / recordable nonvolatile memory 102 in which a firmware program of the system control circuit 109 is recorded is provided. Capability information notified by the liquid crystal projector 100 to the digital camera is recorded in the nonvolatile memory 102.

  The operation unit 103 for inputting various operation instructions of the system control circuit 109 is configured by a single or a combination of a switch, a dial, a touch panel, pointing by line-of-sight detection, a voice recognition device, and the like. The remote control light receiving unit 120 receives a remote control key from an infrared remote controller attached to the liquid crystal projector 100. The remote control keys serve as various operation instructions for the system control circuit 109.

  The power control unit 104 includes a DC-DC converter, a switch circuit that switches a block to be energized, and the like. The power supply control unit 104 detects the power supply unit 105 composed of an AC adapter or the like, controls the DC-DC converter based on the detection result and the instruction of the system control circuit 109, and supplies a necessary voltage for a necessary period of time with a cooling fan not shown. To each part including

  The liquid crystal projector 100 can be connected to a network via an Ethernet (registered trademark) interface (I / F) 107 to notify a system that centrally manages the liquid crystal projector of a liquid crystal projector failure or the like. Further, it can be connected to a digital camera, a USB memory, or the like via a USB interface (I / F) 106 using a USB cable. The Ethernet (registered trademark) interface 107 and the USB interface 106 are examples of display-side communication means.

  The system control circuit 109 has a function of controlling the USB interface 106 to receive image data and commands from the digital camera 200 and to transmit a response to the digital camera 200.

  The image processing unit 108 performs processing for setting a display position of a JPEG image read from a digital camera, a USB memory, and the like, and processing for overlaying information such as a file name, date, and Exif. The image processing unit 108 processes the received image data in accordance with an image processing command received via the USB interface 106. Then, the received image data is digitally converted into RGB signals composed of three color signals of red (R) / green (G) / blue (B) in accordance with the received print command.

  The projector video signal processing circuit 111 performs signal processing for converting digitized RGB signals into signals suitable for the projector apparatus. Examples of such signal processing include interlaced progressive conversion processing, frame rate conversion processing, and resolution conversion processing. The frame memory 110 is used for signal processing when the projector video signal processing circuit 111 converts the signal into a signal suitable for the projector, and can record RGB signals of one frame or more.

  The signal level adjustment circuit 112 adjusts the output from the projector video signal processing circuit 111 to a signal level suitable for the projection image projected by the projector device. The liquid crystal driver 113 drives the liquid crystal panel 117 based on the output signal of the signal level adjustment circuit 112. The lamp 116 is a light source for projecting a projection image on the screen 119. The power supplied from the power source 105 is converted into stable high voltage power by a lamp driving circuit (ballast) 115 and supplied to the lamp 116. An R / G / B color filter is bonded to the liquid crystal panel 117, and the light projected from the lamp 116 is transmitted or blocked corresponding to the RGB image. The lens group 118 forms the RGB color images that have passed through the liquid crystal panel 117 on the screen 119 and changes the size of the projected image. The screen 119 provides a projection surface on which a video signal is imaged.

  FIG. 4 is a diagram showing a configuration of the digital camera 200 in the present embodiment. The digital camera 200 according to the present embodiment includes a photographing lens 2, a shutter 3 having a diaphragm function, an image sensor 4 that converts an optical image into an electrical signal, and an A / D conversion that converts an analog signal output from the image sensor 4 into a digital signal. A vessel 5 is provided. Further, a timing generation circuit 6, a D / A converter 7, a memory control circuit 8, a system control circuit 9, an image processing circuit 10, an image display memory 11, a memory 12, and an image display unit 13 are provided.

  The timing generation circuit 6 supplies a clock signal and a control signal to the image sensor 4, the A / D converter 5, and the D / A converter 7. The D / A converter 7 D / A converts the display image data written in the image display memory 11 and causes the image display unit 13 to display it. The image display unit 13 is an image display unit composed of a TFT LCD or the like, and an electronic viewfinder function can be realized by sequentially displaying captured image data.

  The memory control circuit 8 controls the A / D converter 5, the timing generation circuit 6, the image processing circuit 10, the D / A converter 7, and the memory 12. The image processing circuit 10 performs image processing such as predetermined pixel interpolation processing and color conversion processing on the data from the A / D converter 5 or the data from the memory control circuit 8.

  A system control circuit (management-side control unit) 9 controls the entire digital camera 200. The memory 20 stores constants, variables, programs, and the like for operation of the system control circuit 9. The system control circuit 9 has a function with the liquid crystal projector 100.

  Image data from the A / D converter 5 or image data processed by the image processing circuit 10 is written into the image display memory 11 or the memory 12 via the memory control circuit 8. The memory 12 has a function of storing captured still images and moving images, and has a sufficient storage capacity to store a predetermined number of still images and a predetermined time of moving images.

  The exposure control unit 14 controls the shutter 3 having a diaphragm function, and also has a flash light control function in cooperation with the flash 17. The distance measurement control unit 15 controls focusing of the photographic lens 2, and the zoom control unit 16 controls zooming of the photographic lens 2.

  The power control means 18 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches blocks to be energized, and the like. The power supply control means 18 detects the presence / absence of a battery, the type of battery, the remaining battery level, controls the DC-DC converter based on these detection results and instructions from the system control circuit 9, and requires the necessary voltage. It is supplied to each part including the recording medium for a long period. The power supply means 19 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, an AC adapter, or the like.

  The display unit 21 is configured by a combination of, for example, an LCD, an LED, a speaker, and the like, and displays an operation state, a message, and the like using characters, images, sounds, and the like according to execution of a program by the system control circuit 9. One or a plurality of display units 21 are installed at positions where the digital camera 200 is easily visible.

  The non-volatile memory 22 is an electrically erasable and recordable memory element, and can store wireless setting information of the device. The digital camera 200 also includes a memory card interface (I / F) 23 for connecting a memory card, and a USB interface (I / F) 24 for connecting to an external device using a USB. These are examples of management-side communication means.

  The operation unit 25 is a means for inputting various operation instructions to the system control circuit 9, and is composed of a single or a plurality of combinations such as a switch, a dial, a touch panel, pointing by eye-gaze detection, a voice recognition device, and the like. 21 is provided in the vicinity.

  The shutter switch 26 performs an exposure process for writing image data to the memory 12 via the A / D converter 5 and the memory control circuit 8 and a calculation in the image processing circuit 10 and the memory control circuit 8. An instruction to start the operation of a series of processing called development processing is used.

  The wireless communication circuit 27 transmits and receives wireless signals and controls wireless communication. The wireless communication circuit 27 is connected to an antenna 28 for performing wireless communication with other devices.

  FIG. 5 is a perspective view showing the back surface of the digital camera 200 in the present embodiment.

  On the back of the digital camera 200, a changeover switch 2600, a power button 2601, a SET button 2602, an up / down / left / right button 2603, a MENU button 2604, and a liquid crystal monitor 2605 are provided. The changeover switch 2600 is a switch for switching between a mode for taking a picture (shooting mode) and a mode for displaying a taken image (image reproduction mode). The power button 2601 is a button used when turning on / off the power of the digital camera 200. The SET button 2602 is a button used when, for example, setting values are confirmed. The up / down / left / right button 2603 is used to move the cursor up / down / left / right when selecting a menu, or to display the next image or the previous image when there are a plurality of images in the image playback mode. The MENU button 2604 is used when displaying the MENU. The DISP button 2606 is used to display the shooting date and time and the histogram of the image. The zoom lever 2607 adjusts the shooting magnification in the shooting mode, and adjusts the size of the display image in the image playback mode. The user can enlarge the shooting magnification and display size by rotating the zoom lever 2607 clockwise, and can reduce the shooting magnification and display size of the enlarged image by rotating the zoom lever 2607 counterclockwise. it can.

  Next, a procedure until establishment of communication between the liquid crystal projector 100 and the digital camera 200 in the present embodiment will be described with reference to FIG. FIG. 6 is a sequence diagram showing negotiation until establishment of communication between liquid crystal projector 100 and digital camera 200 in the present embodiment.

  When the liquid crystal projector 100 and the digital camera 200 are turned on and connected with a USB cable, the liquid crystal projector 100 and the digital camera 200 negotiate with each other to confirm whether or not the other party has the DPS function. In the PictBridge standard, DPS discovery is executed after a PTP connection is established between both devices using USB connection as a trigger (step S601). Specifically, the digital camera 200 and the liquid crystal projector 100 are respectively connected to DDISCVRY. DPS and HDISCVRY. By sending an empty script file called DPS, it is confirmed that the devices are compatible with PictBridge. This DPS discovery process corresponds to a communication establishment step of establishing communication with an external device connected in accordance with the PictBridge standard.

  Subsequently, the print client 502 of the digital camera 200 issues a DPS_ConfigurePrintService 401 to the print server 501 of the liquid crystal projector 100 (step S602). The purpose is to confirm the functions of both the liquid crystal projector 100 and the digital camera 200. That is, the liquid crystal projector 100 notifies each other that the print server 501 and the storage client 503 are included, and that the digital camera 200 includes the print client 502 and the storage server 504.

  Next, the digital camera 200 determines the type of device to be connected based on the information acquired by the DPS_ConfigurePrintService 401 (step S620). Although this process will be described later, it corresponds to a detection step of detecting whether or not the connected external device is a liquid crystal projector.

  Next, the print client 502 of the digital camera 200 issues a DPS_GetCapability 403 to the print server 501 of the liquid crystal projector 100 (step S603). This is a command for inquiring what display setting is possible for the liquid crystal projector 100 when the connected external device is a liquid crystal projector. The print server 501 performs a capability information acquisition process, acquires print capability information associated with the screen resolution of the liquid crystal projector 100, and notifies the print client 502 of the capability information. Capability information includes parameters such as paper size, paper type, file type, date printing, file name printing, image optimization, layout, fixed size, trimming, and quality.

  FIG. 7 is a flowchart showing an operation when the digital camera 200 determines a connection target device in step S620 of FIG.

  In the process of FIG. 7, the digital camera 200 refers to the DPS_ConfigurePrintService command issued in step S602 of FIG. Then, the DPS version, vendor name, product name and serial number of the connection target device are recognized (step S5001).

  Subsequently, the digital camera 200 determines whether the connection target device is a liquid crystal projector from the product name (step S5002). If the product name is for a projector (Yes in step S5002), the digital camera 200 shifts the internal state to the liquid crystal projector connection mode (step S5005) and ends the process. If the product name is not for the projector (No in step S5002), that is, if it is determined that the product is connected to the printer, the process is terminated while the connection mode remains the default printer connection mode.

  Note that the determination as to whether or not to shift to the projector connection mode is not limited to the method based on the determination of the product name. For example, the determination can also be made by parameters such as the paper type acquired by the digital camera 200 using the DPS_GetCapability command in step S603 of FIG. In the PictBridge standard, a vendor extension of capability information can be defined. Therefore, it is possible to define the paper type for the liquid crystal projector by the vendor. In this case, when the digital camera 200 acquires the paper type for the liquid crystal projector using the DPS_GetCapability command, the internal state can be changed to the liquid crystal projector connection mode.

  When determining the projector connection based on the paper type, the DPS_GetCapability command shown in FIG. 8 is used. The DPS_GetCapability command shown in FIG. 8 is a command for inquiring a paper type that can be set in the connected device. FIG. 8A shows a command 5700 that the print client 502 transmits to inquire about the paper type. FIG. 8B shows a response 5701 transmitted from the print server 501 to the command 5700, which describes a result value and a paper type corresponding to the liquid crystal projector.

  Table 1 below shows the correspondence between the value of the paper type (paperType) transmitted by the print server 501 of the liquid crystal projector 100 in response to the DPS_GetCapability command and the meaning indicated by the value.

For example, when three required values of the values shown in Table 1 are transmitted, the liquid crystal projector 100 uses normal paper, 90-degree image rotation paper (hereinafter referred to as Paper 90), and 270-degree image rotation paper (hereinafter referred to as Paper 270). ). Assume that the paper types of Paper 90 and Paper 270 are defined as vendor extension. In the present embodiment, Paper 90 means that the liquid crystal projector rotates and displays an image by 90 degrees, and Paper 270 means that the liquid crystal projector rotates and displays an image by 270 degrees. Note that the value of the paper type is not limited to this embodiment.

  Next, processing after the connection between the digital camera 200 and the liquid crystal projector 100 is established and the internal state of the digital camera 200 is set to the liquid crystal projector connection mode will be described.

  FIG. 9 is a sequence diagram of a DPS command from when the user operates the digital camera 200 to set the image playback mode until image display is completed in the present embodiment. The image playback mode is a mode for displaying an image (still image / moving image) stored in a storage such as a memory card already taken by the user on the liquid crystal projector 100 for browsing.

  When the user switches the changeover switch 2600 of the digital camera 200 to the playback mode, the digital camera 200 shifts to the image playback mode (step S630). Here, the user can select image data (image file) to be displayed from the image data stored in the storage medium. When the user performs a selection operation, printing of the selected image data is instructed. That is, the print client 502 of the digital camera 200 issues a DPS_StartJob command as a print command to the print server 501 of the liquid crystal projector 100 (step S605, issue step). As a result, print information including print settings and the selected image file is transmitted from the print client 502 to the print server 501. Receiving this, the liquid crystal projector 100 transitions from the standby state to the display processing state. At this time, in this embodiment, even if the parameter of the DPS_StartJob command specifies that the number of printed sheets is two or more, the print server 501 interprets it as a display instruction for displaying one sheet. This is because, unlike printers, there are almost no cases where it is desired to display two identical image data when displaying image data.

  In order to notify the digital camera 200 that the liquid crystal projector 100 has transitioned from the standby state to the display processing state, the print server 501 issues a DPS_NotifyDeviceStatus event to the print client 502 (step S606). In addition, the digital camera 200 is notified of the progress indicating which display processing is currently being performed in the image file designated for printing. Specifically, the print server 501 issues a DPS_NotifyJobStatus event to the print client 502 (step S607).

  Subsequently, the storage client 503 issues a DPS_GetFileInfo command to the storage server 504 in order to acquire the file type and file size information of the image to be displayed next. Then, the storage server 504 returns file information to the storage client 503 (step S608). Here, the storage client 503 secures a memory based on the acquired file size information and prepares for acquisition of an image file to be displayed next.

  Subsequently, the storage client 503 issues a DPS_GetFile command to the storage server 504 in order to collectively acquire image file data based on the information acquired in step S608. Then, an image file is acquired from the storage server 504 (step S609). Note that there is a method of dividing and acquiring an image file by using a DPS_GetPartialFile command instead of the DPS_GetFile command.

  The storage client 503 transmits the display data of the image file acquired in step S609 to the print device, and the print device displays the image according to the layout described in the DPS_StartJob command. Here, an image is projected and displayed on the screen 119 shown in FIG.

  When the above sequence is completed, the print server 501 notifies the digital camera 200 that the liquid crystal projector 100 has transitioned to the standby state. Specifically, DPS_NotifyDeviceStatus is issued to the print client 502 (step S611). It is also possible to move to step S605 by pressing the up / down / left / right key thereafter.

  FIG. 10 shows an example of a display screen that the liquid crystal projector 100 displays on the screen 119 when the user operates the digital camera 200 to enter the image reproduction mode. When the user presses the up / down / left / right button 2603 of the digital camera 200, the digital camera 200 issues a print command to the liquid crystal projector 100, and an image 2400 corresponding to the print command is displayed. At this time, the display screen of the liquid crystal projector 100 is the same as the display screen of the liquid crystal monitor 2605 of the digital camera 200 shown in FIG. When the user presses the left / right button 2603 of the digital camera 200 again, the next image data is displayed.

  Next, processing for processing an image projected and displayed by the liquid crystal projector 100 by the user operating the digital camera 200 will be described. First, operations of the digital camera 200 and the liquid crystal projector 100 when the user performs an image rotation operation will be described. FIG. 11A is a diagram showing the back of the digital camera 200 when the user presses the menu button 2604 in a state where the digital camera 200 is set to the image playback mode.

  A menu item is displayed on the liquid crystal monitor 2605 of the digital camera 200 so as to overwrite the displayed image. Menu items include rotation and image parameter correction. In the state shown in FIG. 11A, when the user selects rotation 5401 from the menu item and presses the SET button 2602, the image is rotated and displayed as shown in FIGS. 11B and 11C. Is done.

  FIG. 11B shows an image 5500A after the SET button 2602 is pressed once in the state of FIG. 11A, and FIG. 11C shows the SET button 2602 in the state of FIG. An image 5500B after being pressed twice is shown. The image 5500A is rotated 90 degrees clockwise from the state displayed in FIG. The image 5500B is rotated 270 degrees clockwise from the state displayed in FIG.

  Next, a sequence for rotating an image as described above will be described. FIG. 12 is a sequence diagram of a DPS command when the user performs an image rotation operation on the digital camera 200 while the liquid crystal projector 100 is displaying the image 2400 as shown in FIG.

  First, the digital camera 200 is operated by the user, and 90-degree image rotation is instructed (step S5601, operation step). Then, the print client 502 sets the paper 90 acquired in the response 5701 of FIG. 8 as the paper type, and issues DPS_StartJob (step S5602, transmission step). At this time, the print client 502 uses the file ID transmitted to the print server 501 immediately before.

  Next, the digital camera 200 is notified that the liquid crystal projector 100 has transitioned from the standby state to the display processing state. Specifically, the print server 501 issues a DPS_NotifyDeviceStatus event to the print client 502 (step S5603). In addition, the digital camera 200 is notified of the progress indicating which display processing is currently being performed in the image file designated for printing. Specifically, the print server 501 issues a DPS_NotifyJobStatus event to the print client 502 (step S5604).

  The liquid crystal projector 100 interprets the received DPS_StartJob event and performs rotation processing of the currently displayed image (step S5605, reception step and image processing step). This image rotation process will be described in detail later.

  Subsequently, the storage client 503 sends display data to the print device to display an image (step S5606, display step). When the above is completed, the print server 501 issues DPS_NotifyDeviceStatus to the print client 502 in order to notify the digital camera 200 that the liquid crystal projector 100 has transitioned to the standby state (step S5607).

  FIG. 13 is a flowchart showing image rotation processing performed by the liquid crystal projector 100 in step S5606 of FIG. The liquid crystal projector 100 determines the Capability paper type received from the digital camera 200 (step S5800). If the paper type is Paper 90, the liquid crystal projector 100 rotates and displays the original image of the currently displayed image by 90 degrees (step S5801). If the paper type is Paper 270, the liquid crystal projector 100 rotates and displays the original image of the currently displayed image by 270 degrees (step S5802). If the paper type is neither Paper 90 nor Paper 270, the liquid crystal projector 100 displays the currently displayed image as it is.

  FIG. 14 shows the result of the user operating the digital camera 200 to rotate the image, and the liquid crystal projector 100 executing the image rotation processing in step S5801 in FIG. 13 accordingly. (A) shows the display screen of the digital camera 200, and (B) shows the display screen of the liquid crystal projector 100. The liquid crystal monitor 2605 of the digital camera 200 displays an image 5900A obtained by rotating the original image 90 degrees to the right, and the liquid crystal projector 100 similarly projects and displays an image 5900B obtained by rotating the original image 90 degrees to the right.

  As described above, in a system in which the digital camera 200 and the liquid crystal projector 100 are connected by USB, an image held by the digital camera 200 can be projected and displayed by operating the operation member such as a button. . Further, when the user operates the digital camera 200 to rotate the displayed image, the projection image of the liquid crystal projector 100 can be rotated in conjunction with the rotation. Thereby, the user can rotate the projection image of the liquid crystal projector 100 by operating only the digital camera 200.

  Next, a method for changing the magnification of the image projected by the liquid crystal projector 100 by operating the digital camera 200 in the system in which the liquid crystal projector 100 and the digital camera 200 are connected by USB as described above will be described.

  FIG. 15 is a sequence diagram of the DPS command when the user operates the zoom lever 2607 of the digital camera 200 to enlarge the display image.

  First, the user operates the zoom lever 2607 of the digital camera 200 to accept an image enlargement operation (step S6101, operation step). Then, the print client 502 sets the cropping area and the image ID, and issues DPS_StartJob (step S6102, transmission step). At this time, the print client 502 uses the file ID transmitted to the print server 501 immediately before. A method for specifying the cropping area will be described later.

  Subsequently, as in the sequence of FIG. 12, the print server 501 issues a DPS_NotifyDeviceStatus event and a DPS_NotifyJobStatus event to the print client 502 (steps S5603 and S5604).

  Next, the print server 501 refers to the received cropping area and enlarges the displayed image (step S6110, reception step and image processing step). This image enlargement process will be described later in detail.

  Next, the storage client 503 sends display data to the print device to display an image (step S5606, display step). When the above is completed, the print server 501 issues DPS_NotifyDeviceStatus to the print client 502 in order to notify the digital camera 200 that the liquid crystal projector 100 has transitioned to the standby state (step S5607).

  FIGS. 16A and 16B show a DPS_GetCapability command necessary for enlarging an image. FIG. 16A shows a command 6200 that the print client 502 transmits to inquire about the cropping capability. FIG. 16B shows a response 6201 of the print server 501 with respect to the command 6200, which describes the result (result) value and whether or not the liquid crystal projector supports cropping.

  FIG. 16C shows a DPS_StartJob command 6300 necessary for enlarging the image. This command includes a cropping area parameter set by the print client 502. The cropping area designating method in the present embodiment can designate a cropping area by designating specific coordinates and designating lengths in the vertical and horizontal directions from the coordinates.

  FIG. 17 is a flowchart showing image enlargement processing performed by the liquid crystal projector 100 in step S6110 of FIG. The liquid crystal projector 100 acquires the image display area of the digital camera 200 from the received cropping area (step S6501). Then, the liquid crystal projector 100 performs an enlargement process on the currently displayed image so that the same display as the image display area is performed (step S6502).

  FIGS. 18A and 18B show the result of the user operating the digital camera 200 to enlarge an image, and the liquid crystal projector 100 executing the image enlargement process in step S6110 in FIG. 15 accordingly. 18A shows a display screen of the digital camera 200, and FIG. 18B shows a display screen of the liquid crystal projector 100. FIG. An image 6600A obtained by enlarging the original image is displayed on the liquid crystal monitor 2605 of the digital camera 200, and the liquid crystal projector 100 similarly projects and displays an image 6600B obtained by enlarging the original image.

  As described above, in a system in which the digital camera 200 and the liquid crystal projector 100 are connected by USB, when the user enlarges an image displayed by operating the digital camera 200, the projection of the liquid crystal projector 100 is interlocked with this. The image can also be enlarged.

  In the above example, only the operation of enlarging the image has been described. However, when the enlarged image is reduced or the display area is moved by sliding the enlarged image by the same operation of the zoom lever. Applicable. When the image is slid, the print client 502 sets the image display area in the cropping area and issues DPS_StartJob according to the user's slide operation.

  Next, a method for correcting the image parameters of an image projected by the liquid crystal projector 100 by operating the digital camera 200 in the system in which the liquid crystal projector 100 and the digital camera 200 are connected by USB as described above will be described. First, operations of the digital camera 200 and the liquid crystal projector 100 when the user performs image parameter correction will be described. When the user presses the menu button 2604 while the digital camera 200 is set to the image playback mode, menu items are displayed as shown in FIG. In the state shown in FIG. 11A, when the user selects image parameter correction from the menu items and presses the SET button 2602, menu items for image parameter correction are further displayed.

  In the present embodiment, menu items include items such as red-eye correction, black and white, sepia, and face brightening. However, the menu items are not limited to these, and may include image correction parameter items such as fair skin and brown skin, for example.

  Next, the sequence for correcting the image parameter as described above will be described. FIG. 19 is a sequence diagram of the DPS command when the user instructs an image parameter correction operation when the liquid crystal projector 100 displays the image 2400 as shown in FIG.

  First, the user receives selection of an image parameter item to be corrected from the menu item (step S7001, operation step). Then, the print client 502 sets the corresponding image optimization parameters and image ID, and issues DPS_StartJob (step S7002, transmission step). At this time, the print client 502 uses the file ID transmitted to the print server 501 immediately before.

  Subsequently, as in the sequence of FIG. 12, the print server 501 issues a DPS_NotifyDeviceStatus event and a DPS_NotifyJobStatus event to the print client 502 (steps S5603 and S5604).

  Next, the print server 501 corrects the parameters of the displayed image with reference to the received image optimization parameters (step S7110, reception step and image processing step). This image parameter correction process will be described in detail later.

  Next, the storage client 503 sends display data to the print device to display an image (step S5606, display step). When the above is completed, the print server 501 issues DPS_NotifyDeviceStatus to the print client 502 in order to notify the digital camera 200 that the liquid crystal projector 100 has transitioned to the standby state (step S5607).

  FIG. 20A shows a command 6800 that the print client 502 transmits to inquire about the image optimization capability. FIG. 20B shows a response 6801 of the print server 501 with respect to the command 6800, and describes a result value and an image optimization parameter supported by the liquid crystal projector.

  FIG. 20C shows a DPS_StartJob command 6900 necessary for correcting the image parameter. This command includes image optimization parameters set by the print client 502.

  Table 2 below shows the correspondence between the image correction value transmitted by the print server 501 in response to the DPS_GetCapability command and the image optimization parameter indicated by the value. In the present embodiment, values are assigned to image optimization parameters such as red-eye correction, black and white, sepia, and face brightness. The assignment of values to the parameters is assumed to be uniquely defined in advance as a vendor extension by each vendor.

FIG. 21 is a flowchart showing image parameter correction processing performed by the liquid crystal projector 100 in step S7110 of FIG. The liquid crystal projector 100 acquires parameters to be corrected from the received image optimization information (step S7301). Then, the liquid crystal projector 100 corrects the parameters of the currently displayed image (step S7302).

  As described above, when the parameter of the image displayed by the user operating the digital camera 200 is corrected, the parameter of the projection image of the liquid crystal projector 100 can be corrected in conjunction with this. As a result, the user can correct the parameters of the projection image of the liquid crystal projector 100 by operating only the digital camera 200.

  Next, in the system in which the liquid crystal projector 100 and the digital camera 200 are connected via USB as described above, a method for displaying the date on the image projected by the liquid crystal projector 100 by operating the digital camera 200 will be described.

  When the user presses the DISP button 2606 of the digital camera 200, the date is displayed over the displayed image data. FIG. 22 is a sequence diagram of the DPS command when the user presses the DISP button 2606 of the digital camera 200. In the present embodiment, date display on the liquid crystal projector 100 is controlled using a date print function that instructs to include date information in a so-called printed matter.

  First, the user presses the DISP button 2606 of the digital camera 200 during the image playback mode (step S7601, operation step). Then, the print client 502 sets the corresponding date information and the image ID, and issues DPS_StartJob (step S7602, transmission step). At this time, the print client 502 uses the file ID transmitted to the print server 501 immediately before.

  Subsequently, as in the sequence of FIG. 12, the print server 501 issues a DPS_NotifyDeviceStatus event and a DPS_NotifyJobStatus event to the print client 502 (steps S5603 and S5604).

  Next, the print server 501 refers to the received date information and displays the date on the displayed image (step S7610, reception step and image processing step). This date display process will be described in detail later.

  Next, the storage client 503 sends display data to the print device to display an image (step S5606, display step). When the above is completed, the print server 501 issues DPS_NotifyDeviceStatus to the print client 502 in order to notify the digital camera 200 that the liquid crystal projector 100 has transitioned to the standby state (step S5607).

  FIG. 23A shows a command 7500 that the print client 502 transmits to inquire about the dataPrints capability. FIG. 23B shows a response 7501 of the print server 501 to the command 7500, and describes a result (result) value and dataPrints corresponding to the liquid crystal projector.

  FIG. 23C shows a DPS_StartJob command 7700 necessary for displaying the date on the image. This command includes a date parameter set by the print client 502. By reading this parameter, the liquid crystal projector 100 displays the date information superimposed on the currently displayed image.

  FIG. 24 shows the result of the user operating the digital camera 200 to display the date on the image and the liquid crystal projector 100 executing the date display processing in step S7610 in FIG. 22 accordingly. (A) shows the display screen of the digital camera 200, and (B) shows the display screen of the liquid crystal projector 100. An image 7900A with a date added is displayed on the liquid crystal monitor 2605 of the digital camera 200, and the liquid crystal projector 100 similarly projects and displays an image 7900B with the date added to the original image.

  As described above, the liquid crystal projector can display the date in conjunction with the date display of the digital camera performed by the user. Thereby, the user can add a date display to the display image of the liquid crystal projector by operating only the digital camera.

  Note that although a system using a liquid crystal projector and a digital camera has been described in this embodiment, the image display apparatus can also be applied to a device that displays an image, such as a television or an image viewer.

  In this embodiment, the case where the print client 502 issues DPS_StartJob when the user operates the up / down / left / right button 2603 of the digital camera 200 has been described. However, the timing for issuing DPS_StartJob is not limited to this embodiment. For example, when the digital camera 200 shifts to the image reproduction mode, it can be realized by the print client 502 periodically issuing StartJob at a fixed period. Further, when the user's operation of the up / down / left / right button 2603 does not occur for a certain period of time, the print client 502 may issue the last operation (image processing operation) of the up / down / left / right button 2603 as DPS_StartJob. Furthermore, when the user presses the up / down / left / right button 2603 for a predetermined time or longer, the button operation may be issued as DPS_StartJob.

  In addition, the communication packet format used by each terminal for communication in forming the device connection, the operation member for displaying the image, and the like are not limited to the present embodiment.

  The object of the above-described embodiment can also be achieved by causing the central processing means (CPU or MPU) of the apparatus to read out and execute the program code of the software that implements the functions of the above-described embodiment from the storage medium.

  Further, the case where the functions of the above-described embodiment are realized by an operating system (OS) or the like performing part or all of the actual processing based on the instruction of the read program code is included.

  When the above-described embodiment is applied to the storage medium, the storage medium (computer-readable storage medium) stores program codes corresponding to the flowcharts described above.

Claims (11)

In an image display system configured by directly connecting an image management device that stores image data and an image display device that displays image data using a protocol for connecting the image management device and a printer,
The image management device includes:
Image storage means for storing image data;
An operation unit capable of performing a selection operation for selecting target image data from the image data stored in the image storage unit, and an image processing operation for the selected image data;
Management-side communication means for establishing communication with an external device connected by the protocol;
Detecting means for detecting whether or not the connected external device is an image display device;
Issuing means for issuing a print command;
When the detection unit detects a connection with the image display device, the management side communication unit is controlled so that the image data, the image processing command input by the image processing operation, and the print command are transmitted to the image display device. Management side control means to transmit to
The image display device includes:
Display means for displaying image data;
Display-side communication means for establishing communication with the image management apparatus using the protocol;
Display-side control means for controlling the management-side communication means to receive image data and the command;
Image processing means for processing the received image data according to the image processing command received by the display-side communication means and for causing the display means to display the received image data according to the received print command. Image display system.   The image display system according to claim 1, wherein the image management apparatus is a digital camera, the image display apparatus is a projector, and PictBridge is used as the protocol.   The operation means of the image management apparatus enables at least one of image rotation, enlargement, parameter correction, and date information display as the image processing operation. The image display system described.   The operation unit of the image management apparatus can perform an operation for instructing printing when connected to an external apparatus using the protocol, and the issuing unit issues a print command when an operation for instructing the printing is detected. The image display system according to claim 1, wherein:   4. The image display system according to claim 1, wherein the issuing unit issues a print command when an image processing operation is detected for a predetermined time.   4. The image display system according to claim 1, wherein the issuing unit issues a print command when the image processing operation is continuously detected for a predetermined time or longer.   4. The image display system according to claim 1, wherein the issuing unit issues a print command periodically at a constant period. Image management apparatus in an image display system configured by directly connecting an image management apparatus that stores image data and an image display apparatus that displays image data using a protocol for connecting the image management apparatus and a printer Because
Image storage means for storing image data;
An operation unit capable of performing a selection operation for selecting target image data from the image data stored in the image storage unit, and an image processing operation for the selected image data;
Management-side communication means for establishing communication with an external device connected by the protocol;
Detecting means for detecting whether or not the connected external device is an image display device;
Issuing means for issuing a print command;
When the detection unit detects a connection with the image display device, the management side communication unit is controlled so that the image data, the image processing command input by the image processing operation, and the print command are transmitted to the image display device. An image management apparatus, comprising: a management-side control unit that transmits the image to the management side. Image display apparatus in an image display system configured by directly connecting an image management apparatus that stores image data and an image display apparatus that displays image data using a protocol for connecting the image management apparatus and a printer Because
Display means for displaying image data;
Display-side communication means for establishing communication with the image management apparatus using the protocol;
Display-side control means for controlling the management-side communication means to receive image data, image processing commands, and print commands;
Image processing means for processing the received image data according to the image processing command received by the display-side communication means and for causing the display means to display the received image data according to the received print command. An image display device. Image management method in an image display system configured by directly connecting an image management device for storing image data and an image display device for displaying image data using a protocol for connecting the image management device and a printer A program for causing a computer to execute
Establishing communication with an external device connected by the protocol; and
A detection step of detecting whether the connected external device is an image display device; and
A selection step for selecting target image data from the image data stored in the image storage unit;
An operation step of accepting an image processing operation on the selected image data;
An issue step for issuing a print command;
A transmission step of transmitting image data, an image processing command input by the image processing operation, and the print command to the image display device when a connection with the image display device is detected in the detection step. A featured program. Image display method in an image display system configured by directly connecting an image management device for storing image data and an image display device for displaying image data using a protocol for connecting the image management device and a printer A program for causing a computer to execute
Establishing communication with the image management apparatus using the protocol; and
A receiving step of receiving image data, an image processing command and a print command transmitted from the image management device;
An image processing step for processing the received image data in accordance with the received image processing command;
And a display step for displaying received image data in response to the received print command.