JP2011035448A - Image display system, image processing apparatus and display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability of a user in displaying image data when a display apparatus displays the image data using a print job. <P>SOLUTION: An image processing apparatus which transmits a print command for printing image data and causes a display apparatus as an external apparatus to display the image data includes: a display means for displaying the image data stored in a storage medium; a selecting means for selecting a display mode at which the display means displays the image data; and a transmitting means for transmitting a command of index printing used to print a plurality of image data on a single sheet to the display apparatus when the selecting means selects a display mode for displaying the plurality of image data on one screen when the image processing apparatus is connected to the display apparatus. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image display system, an image processing device, and a display device that display image data captured by a digital still camera or the like on a connected display device.

  2. Description of the Related Art In recent years, a direct print system is known in which a digital still image is directly transmitted from a digital still camera (hereinafter referred to as a camera) to a photo direct printer (hereinafter referred to as a PD printer) without using a PC. In this direct print system, a standard called PictBridge is used to enable direct printing from a camera to a PD printer even if the camera and the PD printer are manufactured by different manufacturers. In this PictBridge, there are two types of printing methods: single printing for printing one image on one sheet and index printing for printing a plurality of images on one sheet. In this way, when you want to print by specifying the layout, there is a technology that allows you to print in the layout intended by the user by embedding a unique command in the comment part of the command and interpreting this unique command by the camera and PD printer. Yes (see Patent Documents 1 and 2).

JP 2002-93850 A JP 2002-88376 A

Here, transmission of image data using a print job may be used for display on a display device such as a liquid crystal projector instead of a printer. Specifically, a print job of image data that the camera wants to display is generated and transmitted to the display device. Then, it is conceivable that the display device receives a print job and displays image data corresponding to the received print job. However, in the case of transmitting image data using a print job, the camera needs to specify a specific display method such as a display layout for the display device, and there is a risk that the user may be forced to perform complicated operations.
The present invention has been made in view of the above-described problems, and improves user operability when displaying image data when displaying image data on a display device using a print job. With the goal.

The image display system of the present invention is an image display system comprising: an image processing device that transmits a print command for printing image data; and a display device that displays the image data based on the print command. The apparatus comprises: display means for displaying image data stored in a storage medium; selection means for selecting a display form for displaying image data by the display means; and a state connected to the display apparatus; and the selection means When a display form for displaying a plurality of image data on one screen is selected by the above, a transmission means for transmitting an index print command for printing a plurality of image data on one sheet to the display device, A display unit configured to receive an index print command transmitted from the image processing apparatus; and an index print received by the reception unit. And having a display means for displaying a plurality of image data corresponding to the instruction.
An image processing apparatus according to the present invention is an image processing apparatus that transmits a print command for printing image data and displays the image data on a display device as an external device, and stores the image data stored in a storage medium. Display means for displaying, selection means for selecting a display form for displaying image data by the display means, and display for displaying a plurality of image data on one screen by the selection means, connected to the display device When a form is selected, the image processing apparatus includes a transmission unit that transmits an index printing command for printing a plurality of image data on one sheet to the display device.
The display device of the present invention is a display device that displays image data based on a print command received from an image processing device as an external device, and displays a plurality of image data on one sheet transmitted from the image processing device. It has a receiving means for receiving an index printing command for printing, and a display means for displaying a plurality of image data corresponding to the index printing command received by the receiving means.

  ADVANTAGE OF THE INVENTION According to this invention, when displaying image data on a display apparatus using a print job, the operativity of a user when displaying image data can be improved.

It is a figure which shows the external appearance structure of an image display system. It is a figure which shows the internal structure and partial external appearance structure of a projector and a camera. It is a figure for demonstrating the PictBridge protocol. It is a sequence diagram which shows the operation | movement process of an image display system. It is a sequence diagram which shows the operation | movement process of an image display system. It is a figure which shows the external appearance structure of the image display system displayed as an index.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In this embodiment, a digital still camera (hereinafter referred to as a camera) is used as an image processing apparatus that transmits a print job to a display device. A liquid crystal projector (hereinafter referred to as a projector) is used as the display device.
In this embodiment, a direct projection system (image display system) in which a camera directly transmits a digital still image to a projector and projects a digital still image received by the projector will be described. In addition, this embodiment does not cover this invention, and this invention is not limited only to the following form.

FIG. 1 is a diagram showing an external configuration of the entire direct projection system.
The direct projection system 1 includes a projector 10 and a camera 20. The projector 10 and the camera 20 are connected via a USB (Universal Serial Bus) cable 300, for example. The direct projection system 1 according to the present embodiment realizes direct projection from the camera 20 to the projector 10 using a pict bridge. In direct projection in the present embodiment, the camera 20 creates a print job and transmits it to the projector 10. The projector 10 that has received the print job projects image data corresponding to the print job, thereby realizing direct projection. In general, there are several types of print jobs. For example, a print job for printing one image data on one sheet or a so-called index printing for printing a plurality of image data on one sheet. Print jobs.

  As shown in FIG. 1, the projector 10 includes an operation panel 101, a video IF 102, and a camera IF 104. The operation panel 101 is for a user to perform various operations. The camera IF 104 is an interface for connecting a USB cable 300 for connection with the camera 20. The camera IF 104 also functions as an interface circuit (USB host-side interface circuit) for connection with the camera 20.

The camera 20 also includes an LCD screen 201, operation buttons 202, drive mode changeover switch 203, direct output button 204, determination button 205, shutter button 206, display number changeover switch 207, and USB IF 212.
The LCD screen 201 includes an image of light incident on a CCD 211 (see FIG. 2) that is an image sensor, a captured digital still image (hereinafter referred to as image data) stored in a memory card 216 (see FIG. 2), and the like. Is displayed. The operation button 202 is a button for the user to perform various operations. The drive mode switch 203 is a switch for switching the drive mode to a photography mode, an image display mode for displaying image data on the LCD screen 201, or the like.

  The direct output button 204 is a button for the user to instruct the projector 10 connected via the USB cable 300 to perform direct projection using a pict bridge. The determination button 205 is a button for the user to instruct the camera 20 to determine the operation. The display number changeover switch 207 is a switch for the user to change the display mode of image data to be displayed on the LCD screen 201 when the drive mode of the camera 20 is the image display mode. Specifically, the number of images displayed on one screen of the LCD screen 201 can be switched. The USB IF 212 is an interface for connecting the USB cable 300. The USB IF 212 also functions as an interface circuit (USB slave side interface circuit) for connection with the projector 10.

  In the direct projection system 1 configured as described above, the same image data as the image data (image A250 in FIG. 1) displayed on the LCD screen 201 of the camera 20 is also displayed on the projector 10. That is, in response to image A being displayed on LCD screen 201, camera 20 issues a print job for image A 250 and transmits it to projector 10.

Next, FIG. 2 is a diagram illustrating an internal configuration and a partial external configuration of the projector 10 and the camera 20.
The projector 10 includes a CPU (projector side) 103, a projection engine 105, a ROM 106, and a RAM 107 in addition to the operation panel 101, the video IF 102, and the camera IF 104 described above.
The CPU 103 controls the entire projector 10. The CPU 103 includes a decoder 109 and an encoder 110 for PTP (Picture Transfer Protocol) format commands and PictBridge format commands. Note that the decoder 109 and the encoder 110 have a picto-bridge communication protocol architecture as shown in FIG.

  The projection engine 105 includes a liquid crystal panel, its drive driver, a lens, its drive system, and a light source. The projection engine 105 projects and displays image data received from the camera 20 and video received by the video IF 102. The ROM 106 stores a control program that describes the processing procedure of the CPU 103. The RAM 107 functions as a work memory for temporarily storing image data received from the camera 20. Data transmission / reception between these components is performed via the internal bus 118.

Next, the camera 20 includes the above-described LCD screen 201, operation buttons 202, drive mode changeover switch 203, direct output button 204, determination button 205, shutter button 206, display number changeover switch 207, and USB IF 212. . In FIG. 2, the operation button 202, the drive mode changeover switch 203, the direct output button 204, the determination button 205, the shutter button 206, and the display number changeover switch 207 are shown as operation units.
The camera 20 also includes a CPU 208 (camera side), an optical unit 209, an optical unit control driver 210, a CCD 211, a ROM 213, an LCD screen display VRAM (RAM) 214, and a memory card connector 215.

  The CPU 208 controls the entire camera 20. The CPU 208 includes a decoder 218 and an encoder 219 for PTP (Picture Transfer Protocol) format commands and PictBridge format commands. Note that the decoder 218 and the encoder 219 have a picto-bridge communication protocol architecture as shown in FIG.

  Further, the CPU 208 includes a USB connected device determination unit 220 and an image processing unit 221. Here, the USB connection device determination unit 220 determines whether the external device connected via the USB cable 300 is a display device or a printing device. The image processing unit 221 performs image processing on the image data displayed on the LCD screen 201 when the drive mode is the image display mode.

The optical unit 209 includes a lens and its drive system. The optical unit control driver 210 controls the optical unit 209. The CCD 211 is an image sensor and forms an image of a subject and converts it into an electrical signal. The ROM 213 stores a control program describing the processing procedure of the CPU 208. The RAM 214 functions as a work memory for the CPU 208, such as temporarily storing image data. The memory card connector 215 is a connector for connecting a memory card for recording image data. Data transmission / reception between these components is performed via the internal bus 217.
Data transmission / reception between the camera 20 and the projector 10 is performed under the control of the CPU 208 of the camera 20 and the CPU 103 of the projector 10 via the USB IF 212, the USB cable 300, and the camera IF 104.

  Next, referring to FIG. 3, the communication protocol architecture of the PictBridge adopted in this embodiment is shown. In PictBridge, USB 40 is used for the physical layer. Also, PTP is used for the transport layer on the physical layer. Further, as shown in FIG. 3, a DPS layer, which is a new layer for conversion, is provided between the transport layer and the application layer. In the DPS layer, mapping is performed between the PTP communication protocol and the DPS application. PictBridge is a standardized interface protocol between the DPS layer and the application layer.

Next, referring to FIG. 3, the software components of the PictBridge will be described. The software components include PrintServer 43, PrintClient 44, StorageServer 45, StorageClient 46 in the application layer, and DPSD discovery 41, 42 in the DPS layer.
In PictBridge, it is assumed that the projector 10 side requests image data from the camera 20 side when the projector 10 side executes printing in response to a print command from the camera 20 side. Therefore, the user is not normally aware of the StorageClient 46. In the DPS application, each DSO 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. Further, the DPSEEvent is completed in a sequence in which the Client responds to the notification issued from the Server and returns a receipt confirmation to the Server.

(Operation processing in single display)
Next, with reference to the sequence diagram shown in FIG. 4, the operation process of the camera and projector according to the user's operation will be described. Here, a single display for displaying one piece of image data on the LCD screen 201 will be described.
First, in step S101, the user operates the drive mode switch 203 to switch the drive mode of the camera 20 to the image display mode. In the present embodiment, it is assumed that the camera 20 is set so that the display immediately after switching to the image display mode is a single display.
In step S <b> 102, the CPU 208 of the camera 20 reads the image data stored in the storage medium such as the memory card 216 in accordance with the operation of the drive mode changeover switch 203, and displays the read image data on the LCD screen 201 as a single display.

Next, in step S <b> 103, the user connects the projector 10 and the camera 20 with the USB cable 300.
In step S104, according to the USB connection, the CPU 103 of the projector 10 and the CPU 208 of the camera 20 negotiate whether or not each other device is a device having a DPS function by DPS_Discovery.
After confirming that the devices are compatible with PictBridge, in step S105, the projector 10 and the camera 20 transfer control to the DPS application. Then, both devices notify each other what service function they have by using DPS_ConfigurePrintService. Both devices also notify each other of version information and other setting information used when communicating.

In step S <b> 106, the CPU 208 (USB connected device determination unit 220) of the camera 20 determines that the communicating external device connected by the PictBridge is a display device based on the information acquired by DPS_ConfigurePrintService. Here, the USB connection device determination unit 220 functions as an example of an external device determination unit.
Next, in step S107, the CPU 208 of the camera 20 requests capability information that can be set with the DPS_GetCapability from the projector 10.
In step S109, the CPU 103 of the projector 10 receives a request for DPS_GetCapability and transmits the size of the projection panel and settable capability information.
In step S109, the CPU 208 of the camera 20 receives capability information and the like.

  Next, in step S <b> 110, when the CPU 208 of the camera 20 determines that the image data is single-displayed on the LCD screen 201, the CPU 20 instructs the projector 10 to print the image data displayed on the LCD screen 201. Specifically, the CPU 208 of the camera 20 creates an output job script (print command) as a print job in which an identifier (file identifier) of image data and a print instruction are described, and transmits the output job script to the projector 10.

In step S111, the CPU 103 of the projector 10 receives the output job script.
In step S <b> 112, the CPU 103 of the projector 10 creates transmission request information requesting transmission of file information corresponding to the file identifier described in the output script, and transmits the transmission request information to the camera 20. Here, the file information is, for example, a file name, a file size, a file attribute, and the like.
In step S113, the CPU 208 of the camera 20 receives the transmission request information and transmits file information corresponding to the file identifier included in the transmission request information to the projector 10.
In step S114, the CPU 103 of the projector 10 receives file information. By transmitting and receiving information in this way, the projector 10 and the camera 20 can immediately determine whether or not the two devices are smoothly connected.

In step S115, the CPU 103 of the projector 10 makes preparations for receiving image data based on the received file information. Specifically, the CPU 103 checks the free capacity of the RAM 107 based on the file size and determines whether or not reception is possible. If it can be received, the CPU 103 creates image request information for requesting transmission of image data, and transmits the image request information to the camera 20. If reception is not possible, information indicating that reception is not possible is transmitted to the camera 20.
In step S <b> 116, the CPU 208 of the camera 20 receives the image request information and transmits the image data requested by the image request information to the projector 10.

In step S116, the CPU 103 of the projector 10 receives the image data, projects it, and displays it.
In step S117, the CPU 103 of the projector 10 ends the desired projection, and then transmits the result to the camera 20 as DPS_NotifyDeviceStatus.
In step S118, the CPU 208 of the camera 20 receives DSP_NotifyDeviceStatus.

  An example of an image projected and displayed by the operation processing as described above will be described with reference to FIG. As shown in FIG. 1, only one image data of the image A 250 is displayed on the LCD screen 201. In this case, the projector 10 projects the same image A as the image A250 as shown in FIG. On the LCD screen 201, the CPU 208 of the camera 20 displays the shooting date / time information of the image A with an OSD (On Screen Display) 262. However, in the operation process described above, the CPU 208 of the camera 20 does not transmit the information of the OSD 262 to the projector 10, and therefore the CPU 103 of the projector 10 does not project the OSD 262.

(Operation processing in index display)
Next, with reference to the sequence diagram shown in FIG. 5, the operation process of the camera and projector according to the user's operation will be described. Here, an index display for displaying a plurality of image data on the LCD screen 201 will be described. Note that the sequence diagram shown in FIG. 5 is described as being performed after the operation process of the sequence diagram shown in FIG.
First, in step S201, the user operates the display number changeover switch 207 to switch the number of image data displayed on the LCD screen 201 from one single display to nine index display.

Next, in step S <b> 202, the CPU 208 of the camera 20 reads nine image data (image data A to image data I) to be displayed on the LCD screen 201 from the memory card 216 in accordance with the operation of the display number changeover switch 207. .
In step S <b> 203, the CPU 208 (image processing unit 221) of the camera 20 performs a reduction process on the read image data and displays an index on the LCD screen 201.

In step S <b> 204, the CPU 208 of the camera 20 instructs the projector 10 to print an index of nine pieces of image data displayed on the LCD screen 201. Specifically, the CPU 208 of the camera 20 creates an index output job script (print command) as a print job that describes the identifiers of nine image data (file identifiers (1 to 9)) and index print instructions. To do.
In step S <b> 205, the CPU 208 of the camera 20 transmits the created index output job script to the projector 10.

In step S206, the CPU 103 of the projector 10 receives the index output job script.
In step S <b> 207, the CPU 103 of the projector 10 creates transmission request information for requesting transmission of file information corresponding to the file identifier (n) described in the index output job script, and transmits the transmission request information to the camera 20. Note that when the process of step S207 is first performed, the CPU 103 creates transmission request information for requesting only transmission of file information corresponding to the file identifier (1).
In step S208, the CPU 208 of the camera 20 receives the transmission request information and transmits file information corresponding to the file identifier (n) included in the transmission request information to the projector 10.
In step S209, the CPU 103 of the projector 10 receives file information.

In step S210, the CPU 103 of the projector 10 prepares to receive image data based on the received file information. Specifically, the CPU 103 checks the free capacity of the RAM 107 based on the file size and determines whether or not reception is possible. If it can be received, the CPU 103 creates image request information for requesting transmission of image data, and transmits the image request information to the camera 20.
In step S <b> 211, the CPU 208 of the camera 20 receives the image request information and transmits the image data requested by the image request information to the projector 10.
The projector 10 and the camera 20 repeat the above-described processing from step S207 to step S212 for the file identifiers described in the index output job script (here, n = 1 to 9).

In step S213, the CPU 103 of the projector 10 repeats the processing from step S116 to step S121, and receives nine pieces of image data. Here, the CPU 103 of the projector 10 corresponds to an example of an image data receiving unit.
Subsequently, the CPU 103 of the projector 10 creates image data that is displayed as an index in which the received nine pieces of image data are arranged on one screen. Here, the CPU 103 of the projector 10 corresponds to an example of an image creating unit. The CPU 103 of the projector 10 projects and displays the created index display image data.
In step S214, the CPU 103 of the projector 10 ends the desired projection, and then transmits the result as DPS_NotifyDeviceStatus to the camera 20.
In step S215, the CPU 208 of the camera 20 receives DSP_NotifyDeviceStatus.

  An example of an image projected by the operation processing as described above will be described with reference to FIG. As shown in FIG. 6, nine images of image A250 to image I258 are displayed as indexes on the LCD screen 201. In this case, the projector 10 projects the index display of the images A250 to I258 as shown in FIG. Note that an image F255 is selected by the cursor 260 on the LCD screen 201 in FIG. 6, and an OSD 262 indicating shooting date / time information of the selected image F255 and an OSD 261 indicating the number display are displayed. However, in the operation process described above, the CPU 208 of the camera 20 does not transmit the information of the OSD 262 and OSD 261 to the projector 10, and therefore the CPU 103 of the projector 10 does not display the OSD 262 and OSD 261.

  As described above, according to the present embodiment, the index display can be easily performed in the projector by using the index print print job. Specifically, when the user selects an index display with the camera in a state where the camera and the projector are connected, the projector automatically displays the index display displayed on the LCD screen of the camera. Therefore, the user can perform index display on the projector without performing any special operation.

In the above-described embodiment, the case where a captured digital still image is displayed has been described. However, the present invention is not limited to this case. For example, the present invention can be applied even when displaying image data that has not been captured.
In the above-described embodiment, a case has been described in which three are arranged in the vertical and horizontal directions as an index display, and a total of nine are displayed. However, the present invention is not limited to this case. For example, two sheets may be arranged vertically and horizontally, and a total of four sheets may be displayed, or any other plural number may be arranged.
In the above-described embodiment, the projector is described as an example of the display device. However, the present invention is not limited to this case. For example, a display or the like may be used.

  In the above-described embodiment, the case where the image data is displayed on the LCD screen according to the operation by the user has been described. However, the present invention is not limited to this case. For example, even in a slide display that automatically switches the index display displayed on the camera every predetermined time, the projector can perform the index display in the same manner.

1 Direct Projection System 10 Projector 20 Camera 103 CPU
105 Projection engine 106 ROM
107 RAM
109 Decoder 110 Encoder 201 LCD Screen 202 Operation Button 203 Drive Mode Change Switch 204 Direct Output Button 205 Enter Button 206 Shutter Button 207 Display Number Change Switch 208 CPU
212 IF for USB
220 USB connected device determination unit 221 Image processing unit

Claims (7)

An image display system having an image processing device that transmits a print command for printing image data, and a display device that displays the image data based on the print command,
The image processing apparatus includes:
Display means for displaying the image data stored in the storage medium;
Selecting means for selecting a display form for displaying image data by the display means;
When the display device is connected to the display device and the selection unit selects a display form for displaying a plurality of image data on one screen, an index printing command for printing the plurality of image data on one sheet is issued. Transmission means for transmitting to the display device,
The display device
Receiving means for receiving an index printing command transmitted from the image processing apparatus;
An image display system comprising: display means for displaying a plurality of image data corresponding to the index printing command received by the receiving means. An image processing device that transmits a print command for printing image data and displays the image data on a display device as an external device,
Display means for displaying the image data stored in the storage medium;
Selecting means for selecting a display form for displaying image data by the display means;
When the display device is connected to the display device and the selection unit selects a display form for displaying a plurality of image data on one screen, an index printing command for printing the plurality of image data on one sheet is issued. An image processing apparatus comprising: a transmission unit configured to transmit to the display device. An external device determination means for determining whether the external device in communication is a display device or a printing device;
When the external device determining means determines that the external device in communication is a display device,
The image processing apparatus according to claim 2, wherein the transmission unit transmits the index printing command to the display device.   The image processing apparatus according to claim 2, further comprising an imaging unit that images a subject. A display device that displays image data based on a print command received from an image processing device as an external device,
Receiving means for receiving an index printing command for printing a plurality of image data on one sheet transmitted from the image processing apparatus;
And a display means for displaying a plurality of image data corresponding to the index printing command received by the receiving means. Image data receiving means for receiving a plurality of image data corresponding to the index printing command received by the receiving means;
Image creating means for creating image data in which a plurality of image data received by the image data receiving means are arranged on one screen;
The display device according to claim 5, wherein the display unit displays the image data created by the image creation unit.   The display device according to claim 5, wherein the display device is a projector that projects image data.

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