Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
  • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
  • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
  • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
  • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen

Definitions

• the present invention relates to an image distribution apparatus that distributes an image and an image storage apparatus that accumulates the distributed image via a communication line, and an image display apparatus that displays the distributed image on a display unit. It relates to a control method.
• Patent Document 1 Japanese Patent Laid-Open No. 7-219967
• the present invention has been made in view of the above circumstances, and provides an image display device capable of reducing the image search time and suppressing the amount of data transmitted for search, and a control method therefor.
• the porpose is to do.
• An image display device of the present invention is connected to an image distribution device that distributes an image and an image storage device that stores the distributed image via a communication line, and displays the distributed image on a display unit.
• a display device that receives image data from the image distribution device.
• a data communication unit an image display control unit that decodes image data received by the data communication unit, performs image processing and outputs the decoded image data, and image data received by the data communication unit.
• a reduced image management unit that determines whether the image data satisfies a target condition for reduced image display; an image data storage unit that stores only image data determined to satisfy the condition by the reduced image management unit; Is provided.
• the image display device stores only the image data that is the target of reduced image display, so that it is possible to save the trouble of acquiring reduced image data for search from the image storage device side when searching for an image.
• the time can be shortened and the amount of communication data with the image storage device can be suppressed.
• the reduced image management unit when the reduced image display instruction is input, the reduced image management unit reads the image data from the image data storage unit and displays the image display.
• the image display control unit outputs to the control unit, and the image display control unit decodes the image data acquired from the reduced image management unit to create a reduced image.
• the image data storage unit can store the encoded data for the image data to be reduced image displayed, so that the amount of stored data can be reduced. Can do.
• the image display control unit decodes the image data determined by the reduced image management unit to satisfy the conditions for the reduced image display.
• a reduced image is created and stored in the image data storage unit.
• the image display device of the present invention requests the image storage device for image data related to the selected reduced image when an instruction to select the reduced image displayed on the display unit is input.
• An image data requesting unit is provided.
• the image storage device since the image storage device requests data related to the selected reduced image, the image storage device only needs to transmit image data required on the image display device side. Can suppress the amount of data transmitted.
• the data communication unit pauses its operation while the display unit is not operating, and the image data request unit includes the display unit. When this operation is resumed, the image storage device is requested for image data that satisfies the conditions for displaying the reduced image.
• An image distribution system of the present invention is distributed from the above image display device, an image distribution device that distributes image data connected to the image display device via a communication line, and the image distribution device.
• An image storage device for storing images.
• the image display device accumulates only the image data that is the target of reduced image display. This saves the trouble of acquiring the reduced image data for search from the image storage device side during the image search.
• the search time can be shortened, and the amount of communication data with the image storage device can be suppressed.
• the image distribution apparatus includes an image capturing unit that captures an image, and the captured image data is sent to the image display device and the image storage device.
• This is a camera device for distribution.
• the image display apparatus control method of the present invention is connected to an image distribution apparatus that distributes an image and an image storage apparatus that stores the distributed image via a communication line, and the distributed image is displayed on a display unit.
• a method of controlling an image display device to be displayed, the step of receiving image data from the image distribution device, the step of decoding the received image data, performing image processing, and outputting to the display unit, and the reception Image data A step of determining whether or not the image data satisfies the condition to be a target for reduced image display, and a step of storing only the image data determined to satisfy the condition in the image data storage unit. Is.
• the image display device stores only the image data that is the target of reduced image display, so that it is possible to save the trouble of acquiring reduced image data for search from the image storage device side when searching for an image.
• the time can be shortened and the amount of communication data with the image storage device can be suppressed.
• the present invention provides a program for causing a computer to execute each step of the control method of the image display device.
• the image display device stores only the image data that is the target of reduced image display, so there is no need to acquire reduced image data for search from the image storage device side during image search. This saves the search time and reduces the amount of communication data with the image storage device.
• FIG. 1 is a block diagram showing a schematic configuration of an image distribution system according to an embodiment of the present invention.
• FIG. 2 is an explanatory diagram showing the flow of image data in the image distribution system according to the embodiment of the present invention.
• FIG. 3 is a flowchart for explaining a thumbnail image data storage method of the image display device according to the embodiment of the present invention.
• FIG. 4 is a flowchart illustrating an image data search method of the image display device according to the embodiment of the present invention.
• FIG. 5 is a sequence chart for explaining a method of storing thumbnail image data in the image display device according to the embodiment of the present invention.
• FIG. 1 is a block diagram showing a schematic configuration of an image distribution system according to an embodiment of the present invention.
• the image distribution system of this embodiment includes a network camera (hereinafter referred to as NW camera) 1, a switch 2, a recorder 3, and an image display device 4, each of which is a LAN. It is connected via a communication line such as (Local Area Network).
• the NW camera 1 operates as an example of an image distribution device that distributes an image, and has an imaging unit that captures an image data image, encodes the captured image data, and superimposes additional information. Distributes an image to a specified destination via a communication line. Examples of additional information superimposed on image data include time information, image feature values indicating image changes, etc., and alarm generation information from the sensor when the NW camera is equipped with a sensor. Event information and the like.
• Switch 2 switches the transmission path according to the destination of the image data output from NW camera 1.
• the recorder 3 operates as an example of an image storage device, and stores the image data distributed from the NW camera 1.
• the recorder 3 transmits the stored image data to the image display device 4 in response to a request from the image display device 4.
• the image display device 4 includes a data communication unit 41, an image display control unit 42, an image display unit 43, a thumbnail management unit 44, a thumbnail storage unit 45, an image data request unit 46, and an input unit 47.
• the data communication unit 41 is connected to a communication line and receives the image data transmitted from the NW camera 1. Also, it receives image data sent from the recorder 3 and sends a request for image data to the recorder 3.
• the image display control unit 42 decodes the image data received by the data communication unit 41, performs image processing, and outputs it to the image display unit 43.
• the image display unit 43 displays the image output from the image display control unit 42.
• the thumbnail management unit 44 operates as an example of a reduced image management unit.
• the received image data is image data that satisfies a predetermined target condition for displaying a reduced image (hereinafter referred to as a thumbnail). Only the image data determined to satisfy this condition is stored in the thumbnail storage unit 45.
• the thumbnail management unit 44 is mainly composed of a processor that operates according to a predetermined program.
• the thumbnail accumulating unit 45 operates as an example of an image data accumulating unit, and accumulates image data to be displayed as thumbnails written by the thumbnail managing unit 44.
• the image data request unit 46 sets the selected thumbnail based on an instruction from the thumbnail management unit 44.
• An image data transmission request for requesting the related image data to the recorder 3 is generated.
• the input unit 47 is configured to include a keyboard, a touch panel provided on the image display unit 43, and the like.
• the user can specify storage conditions to be stored in the thumbnail storage unit 45 as thumbnail display targets, It accepts input such as instructions for selecting images displayed as thumbnails.
• FIG. 2 is an explanatory diagram showing a flow of image data in the image distribution system according to the embodiment of the present invention.
• Fig. 2 (A) shows the case where the NW camera 1 performs multicast distribution. Image data output from the NW camera 1 is simultaneously sent to the recorder 3 and the image display device 4 via the switch 2. be delivered. As an example different from the multicast distribution, as shown in FIG. 2 (B), it is distributed to the recorder 3 via the image data force switch 2 output from the NW camera 1, and from the recorder 3 to the image display device 4. It will be delivered. In addition, in the cast, the recorder 3 and the image display device 4 from the NW camera 1 through the switch 2 May be delivered to.
• FIG. 3 is a flowchart for explaining a thumbnail image data storage method of the image display device according to the embodiment of the present invention.
• the thumbnail management unit 44 analyzes the additional information superimposed on the encoded image data. (Step S32).
• the received image data is decoded by the image display control unit 42 and displayed on the image display unit 43.
• the thumbnail management unit 44 determines whether or not the additional information power superimposed on the image data satisfies a predetermined accumulation condition (step S33).
• a predetermined accumulation condition for example, the first image data (the earliest time) at the time of occurrence of the event is designated.
• the thumbnail management unit 44 sets the image data as a thumbnail display target and displays a thumbnail. Accumulate in accumulation unit 45 (step S34). On the other hand, if the additional information superimposed on the image data does not satisfy the accumulation condition (NO in step S33), the thumbnail management unit 44 discards the image data (step S35).
• the above-described storage condition may be the condition that image data is stored at a predetermined time or every predetermined time, in addition to the condition determined by the additional information.
• FIG. 4 is a flowchart for explaining an image data search method of the image display device according to the embodiment of the present invention.
• the thumbnail management unit 44 reads image data from the thumbnail storage unit 45 (step S41).
• the thumbnail management unit 44 outputs the read image data to the image display control unit 42.
• the image display control unit 42 generates a thumbnail image by decoding the image data acquired from the thumbnail storage unit 45 (step S42).
• the image display control unit 42 outputs the created thumbnail image to the image display unit 43, and the image display unit 43 displays the thumbnail image (step S43).
• the image display control unit 42 determines whether or not an instruction to select a thumbnail image displayed on the image display unit 43, which is input from the input unit 47, has been detected (step S44). Enter If an instruction to select a thumbnail image is input from the input unit 47 (YES in step S44), the image display control unit 42 determines the designated image, notifies the thumbnail management unit 44, and the thumbnail management unit 44. Identifies image data identification information (time information and additional information) from the image data corresponding to the image determined by the image display control unit 42, and notifies the image data request unit 46 of the identification information (step S45).
• the image data requesting unit 46 sets the image data related to the selected thumbnail image (for example, if the selected image data is the first image data at the time of occurrence of an event, the image data is the first image data).
• the image transmission request for requesting image data for a predetermined time is generated and transmitted to the recorder 3 via the data communication unit 41 (step S46).
• the recorder 3 extracts the requested image data from the stored image data and transmits it to the image display device 4.
• the encoded image data received from the NW camera 1 is stored in the thumbnail storage unit 45, and when the thumbnail display is performed on the image display unit 43, the image display control unit 42 A thumbnail image has been created.
• the thumbnail accumulation unit 45 accumulates the encoded data for the image data to be displayed as thumbnails, so that the amount of accumulated data can be reduced.
• the image display control unit 42 creates a thumbnail image by decoding the image data determined to satisfy the accumulation condition to be displayed by the thumbnail management unit 44 when the image data is received, It may be accumulated in the thumbnail accumulation unit 45.
• the thumbnail image created in the thumbnail accumulation unit 45 is accumulated, so when displaying the thumbnail image, it is only necessary to read out the thumbnail image created in advance and display it on the image display unit 43. Can be displayed quickly.
• the image display device 4 operates, for example, the image display unit 43 operates while the display unit operates. 41 continues to receive the image data, and the thumbnail management unit 44 performs an operation of determining the storage condition. As a result, image data to be displayed as a thumbnail can be stored in the thumbnail storage unit 45.
• FIG. 5 is a thumbnail image of the image display device according to the embodiment of the present invention. It is a sequence chart explaining an image data storage method.
• step S51 when the operation of the image display unit 43 is turned off (step S51), the data communication unit 41 turns off the communication operation (step S52). Thereafter, when the operation of the image display unit 43 is turned on (step S53), the data communication unit 41 turns on the communication operation (step S54). Thereafter, the thumbnail management unit 44 instructs the image data request unit 46 to request image data that matches the storage conditions during the period when the data communication unit 41 has been in the SOFF state. Then, the image data request unit 46 generates an image data request including the storage condition and the period during which the data communication unit 41 is OFF, and notifies the recorder 3 via the data communication unit 41 (step S 55). .
• the recorder 3 searches the stored image data for image data that satisfies the storage condition for the period specified by the image display device 4 (step S56), and if there is image data that satisfies the condition, The image is transmitted to the image display device 4 (step S57).
• the data communication unit 41 receives the image data, and the thumbnail management unit 44 stores the received image data in the thumbnail storage unit 45 (step S58).
• the image data receiving operation is suspended while the image display unit 43 is not operating, so that it is possible to reduce power consumption and thumbnails after the operation of the image display unit 43 resumes. Since the image data to be displayed is requested to the recorder 3, the image data to be stored can be secured.
• the image display device 4 stores only the image data to be displayed as thumbnails, so that the thumbnail image data for the recorder 3 side force search is acquired at the time of image search.
• the search time can be shortened and the amount of communication data with the recorder 3 can be reduced.
• NW camera 1 such as a surveillance camera
• a search using a thumbnail image is performed on the image display device 4 side. Is possible.
• the image display device and the control method thereof according to the present invention have an effect of shortening the image search time and suppressing the amount of data transmitted for search, and are useful for network camera systems and the like.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Television Signal Processing For Recording (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Closed-Circuit Television Systems (AREA)
• Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

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Citations (3)

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• 2006
  • 2006-04-20 JP JP2006116791A patent/JP4316584B2/ja not_active Expired - Fee Related
• 2007
  • 2007-04-20 US US12/281,592 patent/US20090046211A1/en not_active Abandoned
  • 2007-04-20 WO PCT/JP2007/058668 patent/WO2007123215A1/ja not_active Ceased
  • 2007-04-20 CN CN2007800078697A patent/CN101395917B/zh not_active Expired - Fee Related

Patent Citations (3)

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