JP2010016605A - Image decoding and displaying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image decoding and displaying device capable of easily and visually recognizing on which screen an event is generated when the plurality of events to be watched are generated simultaneously when simultaneously displaying and monitoring images obtained from a plurality of imaging apparatus on one display terminal. <P>SOLUTION: Two or more kinds of image data of different image qualities are decoded in a decoder 102 and preserved in a memory 103. An area of interest generation part 104 generates an area under consideration by movement information during decoding and information set from an area-under-consideration outside setting part 108, and an area-under-consideration composition part 105 selects one of the two or more kinds of image data present in the memory 103 when the area under consideration is present, segments the image pertinent to the area under consideration obtained from the area of interest generation part 104 to prepare an area-under-consideration image, and combines it on the other image data present in the memory 103. A composition part 106 combines the image data outputted from the plurality of memories 103 and the plurality of area-under-consideration composition parts 105 and outputs them to a monitoring monitor 120. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image decoding / display device that decodes digitally compressed image data and displays the decoded image.

  In a conventional image decoding / display device, a standard image is acquired for real-time monitoring from an imaging device to be monitored and displayed on a display terminal. When an event such as a movement occurs in the image, the imaging device separately Some have acquired a high-resolution image and displayed the entire image in another area on the display terminal.

  Also, by providing a plurality of areas for partial enlargement display in an area different from the entire display area of the high resolution image, and providing a function for specifying the enlarged image to be displayed from any place in the high resolution image, a standard image In real-time monitoring, when an event to be watched occurs, a method of displaying a high-resolution whole image and a partial image on the same screen for effective monitoring has been devised (for example, Patent Documents) 1).

JP 2006-245746 A

  However, in the conventional image decoding / display device, an image obtained from one imaging device is displayed in a plurality of areas on one display terminal, and thus obtained from a plurality of imaging devices on one display terminal. When displaying the images simultaneously for monitoring, there is a problem that it is difficult to visually recognize which screen display the high-resolution partially enlarged image displayed by an event or the like displayed in another area is.

  The present invention has been made in view of such circumstances, and when displaying images obtained from a plurality of imaging devices simultaneously on a single display terminal for monitoring, a plurality of events to be watched simultaneously occur. It is an object of the present invention to provide an image decoding / displaying device that can easily recognize on which screen an event has occurred even if it is performed.

  The image decoding / display apparatus according to the present invention decodes at least two kinds of digitally compressed image data provided for each channel, which is provided for each channel, and which is input for each channel. A plurality of decoders, a plurality of memories corresponding to each of the plurality of decoders on a one-to-one basis, each of which temporarily holds at least two types of image data output from the corresponding decoder; A plurality of regions of interest that correspond one-to-one with each of the plurality of decoders, and that each generate a region of interest based on motion information at the time of decoding of the corresponding decoder and information set by a region of interest external setting unit There is a one-to-one correspondence between the generation unit and each of the plurality of attention region generation units, and each region of interest is generated by the corresponding attention region generation unit. If one of the two or more types of image data existing in the corresponding memory is selected, an image corresponding to the attention area generated by the corresponding attention area generation unit is cut out and the attention area image is extracted. A plurality of attention area combining sections that are combined with other image data existing in the corresponding memory, and image data output from each of the plurality of memories and the plurality of attention area combining sections. A composite unit that synthesizes and outputs to the display terminal, an operation input unit that receives external input from the user and inputs input information from the user to the plurality of attention area external setting units, and an input from the operation input unit An attention area external setting unit that converts external input from a user into area information of an image and sets the information in each of the plurality of attention area generation units.

  With this configuration, when a plurality of monitoring images are displayed on one display terminal and an event to be noticed occurs simultaneously on the plurality of monitoring images, the monitoring image has a different image quality from the image being monitored. By superimposing the event occurrence areas, it is possible to make it easy to visually recognize at which position of which monitoring target the event has occurred.

  Further, in the above configuration, instead of the attention area synthesis unit, each of them generates an attention area image by cutting out an image corresponding to the attention area generated by the corresponding attention area generation unit. A plurality of attention image forming units that generate images in association with other image data existing therein.

  With this configuration, when a plurality of monitoring images are displayed on one display terminal and an event to be noticed occurs simultaneously in the plurality of monitoring images, it is possible to select which monitoring target without obscuring the normal monitoring area. It is possible to make it easy to see whether an event has occurred.

  The monitoring system of the present invention is capable of digital compression with two or more different image quality, each of the above-described image decoding / display devices, and a plurality of cameras that output digitally compressed images, and output from the image decoding / display device And a display terminal for visually displaying the image data to be displayed.

  With this configuration, when a plurality of monitoring images are displayed on one display terminal and an event to be noticed occurs simultaneously on the plurality of monitoring images, the monitoring image has a different image quality from the image being monitored. By superimposing the event occurrence areas, it is possible to make it easy to visually recognize at which position of which monitoring target the event has occurred.

  According to the present invention, when a plurality of monitoring images are displayed on one display terminal and an event to be noticed simultaneously occurs in the plurality of monitoring images, the monitoring image has a different image quality from the image being monitored. It is possible to provide an image decoding / display device capable of easily recognizing at which position of which monitoring target an event has occurred by superimposing an event occurrence region thereon.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of an image decoding / display apparatus according to Embodiment 1 of the present invention. In the figure, an image decoding / display apparatus 100 according to the present embodiment is used in a monitoring system, and includes an interface 101, decoders (decoders) 102a to 102d, memories 103a to 103d, and a region of interest generation unit. 104a to 104d, attention area synthesis sections 105a to 105d, an operation input section 107, a synthesis section 106, and an attention area external setting section 108.

  The interface 101 takes in digital image data of a plurality of channels from the outside. The decoders 102 a to 102 d are provided for each channel, and decode (decode) at least two types of digitally compressed image data input from the interface 101. The memories 103a to 103d have a one-to-one correspondence with each of the decoders 102a to 102d, and each temporarily holds at least two types of image data output from the corresponding decoders 102a to 102d. The attention area generation units 104a to 104d correspond to the decoders 102a to 102d on a one-to-one basis, and each of them sets motion information at the time of decoding of the corresponding decoders 102a to 102d and information set by the attention area external setting unit 108. To generate a region of interest.

  The attention area synthesis sections 105a to 105d correspond to the attention area generation sections 104a to 104d on a one-to-one basis, and each corresponds to a case where attention areas are generated by the corresponding attention area generation sections 104a to 104d. One is selected from two or more types of image data existing in the memory memories 103a to 103d, and an image corresponding to the attention area generated by the corresponding attention area generation unit 104a to 104d is cut out to generate an attention area image Then, the image data is combined with other image data existing in the corresponding memory memories 103a to 103d. The combining unit 106 has an enlargement / reduction function, combines the image data output from each of the memories 103 a to 103 d and the attention area combining units 105 a to 105 d and outputs the combined image data to the monitoring monitor (display terminal) 120. The operation input unit 107 receives an external input from the user and transmits input information to the attention area external setting unit 108. The attention area external setting section 108 converts the external input from the user obtained from the operation input section 107 into area information of the image, and sets it in each of the attention area generation sections 104a to 104d.

  The cameras 110 a to 110 d constituting the monitoring system have a network connection function and can perform two or more types of digital compression with different image quality, and input digitally compressed images to the interface 101 via the network 111.

  The image decoding / display apparatus 100 of the present embodiment is configured as described above, and the operation thereof will be described below. FIG. 2 is a diagram illustrating an example of an image in which two types of different digitally compressed image data obtained from the same camera 100a input via the interface 101 are decoded by the decoder 102a and stored in the memory 103a. . Thus, the processing related to the image input from the camera 100a is referred to as channel a processing. Similarly, processing relating to an image input from the camera 100b is referred to as channel b processing, processing relating to an image input from the camera 100c is referred to as channel c processing, and processing relating to an image input from the camera 100d is referred to as channel d processing. . In FIG. 2, 220 shows an example of a set of images digitally compressed with the same codec and the same compression rate, and is an example of a moving image codec using motion guarantee used for real-time monitoring. Reference numeral 200 denotes an image at time (t1), and 201 denotes an image at time (t2).

  On the other hand, reference numeral 211 denotes an image at time (t2) when digital compression is performed under a condition in which any one of three conditions of codec, compression rate, and resolution is different from the set of 220 images. 211 is image data of the same imaging range and the same time (t2) as 201, but the codec is different from 201, the compression rate is set low, the resolution is set high, and 211 is superior as the subjective image quality. In this example, only the image data at time (t2) exists.

  FIG. 3 is a diagram showing how a person moves in an example of a set of 220 images. In the figure, reference numeral 300 denotes a person extracted from the image 200 at time (t1), and a lattice pattern represents a boundary line of a macroblock (hereinafter referred to as “MB”) of the 200 images. Similarly, 301 is a diagram in which a person in the image 201 at time (t2) is extracted, and the lattice pattern represents the MB boundary of the 201 image. A set of MBs with a pattern indicated by reference numeral 321 represents a set of blocks used for motion guarantee when the set of MBs with a pattern indicated by 322 is decoded.

  FIG. 4 is a diagram in which a set of 321 MBs and a set of 322 MBs are extracted and superimposed on the MB boundaries of 201 images. Since each MB of 322 is decoded with reference to each MB of 311, the position difference between the set of 321 MB and the set of 322 MB is the person from time (t1) to time (t2) in this example. This movement is used to generate a region of interest.

  Next, an example of an attention area generation method in the attention area generation unit 104a will be described with reference to the flowchart of FIG. 5 and FIG. As an example, among two different digitally compressed image data of channel a obtained from the camera 100a input via the interface 101, a set of images indicated by 220 used for real-time monitoring is used. The process of generating a region of interest will be described using.

Step S501: A set of images used for generating a region of interest is selected from the set of decoded images stored in the memory 103a. In the description of this embodiment, 220 image sets are selected.
Step S502: A reference image for obtaining a region of interest is selected from the set of images selected in step S501. In the description of this embodiment, the image 201 at time (t2) is used as a reference image.

Step S503: For a certain MB of the image selected in step S502, it is determined whether the MB uses motion guarantee. If motion guarantee is used, the process proceeds to step S504. If motion guarantee is not used, the process proceeds to step S506.
Step S504: With respect to the MB using the motion guarantee, the decoding information is obtained from the decoder 102a, and the position information of the image and MB used in the motion guarantee is obtained.
Step S505... The attention area based on the motion information is determined using the motion guarantee information acquired in step S504 (details will be described later).

Step S506 ... If processing for all MBs in the image selected in Step S502 is completed, the process proceeds to Step S507. If processing is not completed, the process proceeds to Step S503 and processing for MBs is continued.
Step S507: From the attention area external setting unit 108, if there is an external setting for the attention area, the processing proceeds to Step S508. If there is no external setting for the attention area, the attention area obtained by the motion security information is displayed as the attention area information. And exit.
Step S508: The attention area obtained by the motion guarantee information and the attention area obtained by the external setting are overlapped, output as attention area information, and the process ends. There may be a plurality of attention area information.

<Description of Step S505>
The algorithm of attention area determination (step S505) based on motion information will be described with reference to FIG. In the figure, reference numeral 602 denotes an MB in the image 201 of FIG. 2 that is determined to use motion guarantee in the motion guarantee use determination (step S503) of the calculation target MB. Reference numeral 601 denotes the position information of the MB used in the motion guarantee calculation of 602, which is acquired in the image and MB position acquisition (step S504) used in the motion guarantee. An arrow 603 is a straight line connecting the central coordinates of 601 and 602, and an MB existing on the straight line is added to the attention area based on the motion information together with 602 and 601.

  FIG. 7 is a diagram showing a region of interest based on motion information of a set of images 220 obtained by the flowchart of FIG. In this figure, reference numeral 702 represents an MB using motion guarantee at time (t2), which is a reference image, and reference numeral 701 represents an MB referred to by the MB 702 at the time of motion guarantee calculation. Reference numeral 703 denotes an attention area based on the motion information added by the attention area determination (step S505) based on the motion information in FIG. , The region of interest at time (t2).

Next, an example of a synthesized image generated by the attention area synthesis unit 105a will be described using the flowchart of FIG. 8 and FIG.
Step S801: In the attention area generation unit 104a, if the attention area has been generated, the process proceeds to step S802. If it has not been generated, the process ends, and the image is not synthesized.

Step S802... A reference image for obtaining the attention area selected in Step S502 is acquired from the memory 103a. In this embodiment, the image 201 is obtained.
Step S803... If there is no image at the same time and at the same time as the reference image acquired in Step S802, the image data having different image quality at the time closest to the reference image is acquired from the memory 103a. In this embodiment, the image 211 is obtained.
Step S804 ... The attention area generation result is acquired from the attention area generation section 104a. When there are a plurality of attention areas, it is possible to select them by this processing. In this embodiment, there is only one area 700, and this area is acquired.

  Step S805: The reference image acquired in Step S802 is compared with the corresponding image acquired in Step S803. If the angles of view are different, the process proceeds to Step S806, and if the angles of view are equal, the process proceeds to Step S807. In this embodiment, since the image 211 acquired in step S803 has a larger angle of view than the reference image 201, the process proceeds to step S806.

  Step S806 ... The corresponding image acquired in step S803 is enlarged / reduced to match the size of the reference image acquired in step S802. In this embodiment, the corresponding image 211 is reduced to match the angle of view of the reference image 201, and the corresponding image 911 is created.

  Step S807: A region corresponding to the attention region is cut out from the corresponding image. In this embodiment, the attention area generation result 700 is applied to the corresponding image 911 having the same angle of view as the reference image 201, and the attention area 921 in the corresponding area is acquired.

  Step S808: The region of interest in the corresponding region acquired in step S807 is synthesized with the reference image. In this embodiment, the attention area 921 in the corresponding area acquired in step S807 is synthesized with the corresponding position with respect to the reference image 201, and the synthesized image 901 is obtained. The outer frame 922 corresponding to the combined boundary line displays a colored frame (for example, a red frame) for emphasis.

  In the above example, two different types of digitally compressed image data of the channel a obtained from the same camera 110a input via the interface 101 are described. However, the channel b obtained from the cameras 110b to 110d. The processing contents are the same for the image data of channel c and channel d.

  FIG. 10 is a diagram illustrating an example of a combined image composed of four images that are combined by the combining unit 106 and output to the monitoring monitor 120. In the figure, reference numeral 1000a denotes an attention area synthesized image 901 of channel a, which is an example of being reduced by the synthesizing unit 106 and synthesized at the upper left. 1000b and 1000c show examples of images of channel b and channel c, but there is no MB using motion guarantee in the image at time (t) in the image data obtained from the cameras 110b and 110c. In addition, an example in which there is no input from the attention area external setting unit 108 to the attention area generation units 104b and 104c is shown. Since the attention area has not been generated by the attention area generation units 104b and 104c, the image at time (t) is directly input to the synthesis unit 106 from the memory 103b and the memory 103c.

  1000d shows an example of an image based on image data obtained from the camera 110d. An area 1001 is an example of an attention area in which parameters are input by the operation input unit 107, converted into attention area information by the attention area external setting unit 108, and input to the attention area generation unit 104d. On the other hand, the region 1002 is a region of interest based on motion information, like the image 1000a. The region of interest generation unit 104d passes 1001 and 1002 to the region of interest combining unit 105d as the same region of interest information. In this way, two attention areas are displayed. In the synthesis unit 106, the images 1000a, 1000b, 1000c, and 1000d are reduced and synthesized to generate a synthesized image 1000.

  As described above, according to the image decoding / display apparatus 100 of the present embodiment, when a plurality of monitoring images are displayed on one monitoring monitor 120, if an event to be noticed simultaneously occurs in the plurality of monitoring images, the monitoring is performed. By superimposing the event occurrence area on the monitoring image with an image quality different from that of the image on which the image is being performed, it is possible to make it easy to visually recognize at which position of which monitoring target the event has occurred.

(Embodiment 2)
FIG. 11 is a block diagram showing a schematic configuration of an image decoding / display apparatus according to Embodiment 2 of the present invention. In the figure, an image decoding / display apparatus 130 according to the present embodiment includes an interface 101, decoders 102a to 102d, memories 103a to 103d, attention area generating sections 104a to 104d, and attention image forming sections 1105a to 1105d. A synthesizing unit 106, an operation input unit 107, and an attention area external setting unit 108.

  The interface 101 takes in digital image data of a plurality of channels from the outside. The decoders 102 a to 102 d are provided for each channel, and decode at least two types of digitally compressed image data input by the interface 101. The memories 103a to 103d have a one-to-one correspondence with each of the decoders 102a to 102d, and each temporarily holds at least two types of image data output from the corresponding decoders 102a to 102d. The attention area generation units 104a to 104d correspond to the decoders 102a to 102d on a one-to-one basis, and each of them sets motion information at the time of decoding of the corresponding decoders 102a to 102d and information set by the attention area external setting unit 108. To generate a region of interest.

  The attention image forming units 1105a to 1105d have an enlargement / reduction function. When the attention regions are generated by the corresponding attention region generation units 104a to 104d, two or more types exist in the memories 103a to 103d. One of the image data is selected, an image corresponding to the attention area generated by the corresponding attention area generation unit 104a to 104d is cut out to generate an attention area image, and exists in the corresponding memories 103a to 103d. After reducing other image data, an image is generated by associating the attention area image. The combining unit 106 has an enlargement / reduction function, combines the image data output from each of the memories 103 a to 103 d and the target image forming units 1105 a to 1105 d, and outputs the combined image data to the monitoring monitor (display terminal) 120. The operation input unit 107 receives an external input from the user and transmits input information to the attention area external setting unit 108. The attention area external setting section 108 converts the external input from the user obtained from the operation input section 107 into area information of the image, and sets it in each of the attention area generation sections 104a to 104d.

  The synthesizing unit 106 has an enlargement / reduction function, synthesizes the image data output from the target image forming units 1105a to 1105d, and outputs the synthesized image data to the display terminal. The operation input unit 107 receives an external input from the user and performs an operation of transmitting input information to the attention area external setting unit 108. The attention area external setting section 108 converts the external input from the user obtained from the operation input section 107 into area information of the image and transmits it to the attention area generation sections 104a to 104d. The cameras 110a to 110d can perform digital compression with two or more different image quality, and input digitally compressed images to the interface 101 via the network 111.

  The operation of the image decoding / display apparatus 130 configured as described above will be described with reference to the drawings. Regarding the processing of two different types of digitally compressed image data obtained from the same camera 100a input via the interface 101, the processing from storage to the memory 103a and generation of the attention area in the attention area generation unit 104a is as follows. Since it is the same as Embodiment 1 of this invention, description is abbreviate | omitted.

  With reference to the flowchart of FIG. 12 and FIGS. 13 and 14, the monitoring image generation process in the target image forming unit 1105a will be described. As an example, among two different digitally compressed image data of channel a obtained from the camera 100a input via the interface 101, a set of images indicated by 220 used for real-time monitoring is used. The monitoring image generation process will be described below.

  Step S1201 ... The reference image obtained from the attention area selected in Step S502 is acquired from the memory 103a. In this embodiment, the image 201 is obtained.

  Step S1202: A plane 1300 having the same size as the image acquired in step S1201 is prepared, and the reference image acquired in step S1201 is reduced in half in both vertical and horizontal directions and then arranged in 1301 (details of the arrangement position will be described later). ).

  Step S1203: The presence / absence of the generation result of the attention area is acquired from the attention area generation unit 104a. If it exists, the process proceeds to step S1204. If it does not exist, the process ends.

  Step S1204... If there is no image at the same time and the same time as the reference image acquired in step S1201, image data having different image quality at the time closest to the reference image is acquired from the memory 103a. In this embodiment, the image 211 is obtained.

  Step S1205: The attention area generation result is acquired from the attention area generation section 104a. When there are a plurality of attention areas, it is possible to select them by this processing. In this embodiment, there is only one area 700, and this area is acquired.

  Step S1206 ... Using the result of attention area generation obtained in step S1205, the attention area generation result is similarly reduced on the reduced reference placed in step S1202, and a red frame is displayed. In this embodiment, it becomes 1302.

  Step S1207 ... A region corresponding to the attention region acquired in step S1205 is cut out from the corresponding image acquired in step S1204. In this embodiment, enlargement / reduction of the attention area generation result 700 is performed on the corresponding image 211 according to the size of the corresponding image 211 to generate the attention area image 1303 in the corresponding area.

  Step S1208: The attention area image of the corresponding image generated in step S1207 can be displayed without overlapping the 1301 image at any position in the area excluding the display area 1301 of the reference image from the display plane 1300. In this case, the process proceeds to step S1210. If the image overlaps 1301, the process proceeds to step S1209.

  Step S1209: The attention area image generated in step S1207 is reduced while maintaining the aspect ratio. The size is reduced until the vertical size is equal to the difference between the upper side of the display plane 1300 and the upper side 1301 of the display area.

  Step S1210: The attention area image generated in steps S1207 and S1209 is arranged on the display plane 1300. The arrangement is performed from the upper left of the display area, and if there are second and subsequent attention area images, they are arranged on the right. In this embodiment, it is arranged at a position 1303.

  Step S1211: The center point of the frame 1302 on the reference image displayed in Step S1206 and the center point of the attention area image arranged in Step S1210 are connected by a line 1304.

  If an image is generated for the channel b in which the region of interest does not exist using the flowchart of FIG. 12, the process below the branch of step S1203 is not executed, so that the reduced image of the reference image is a step as indicated by 1500 in FIG. An image only to be arranged is generated in S1202 (details of the arrangement position will be described later).

<Details of Step S1202 Arrangement Area>
The arrangement method of the image can be arbitrarily changed, but when the output image is composed of four images, the monitoring image output from the synthesizing unit 106 is arranged, for example, as 1400 in FIG. An area 1401 is a display area for channel a, an area 1402 is a display area for channel b, an area 1403 is a display area for channel c, an area 1404 is a display area for channel d, and each size has a vertical and horizontal direction. Both sizes are divided into two equal parts. Reference numeral 1411 present in the area 1401 is a standard image display area for the channel a. In this example, the area 1401 is divided into two equal parts in both vertical and horizontal directions, and the area 1401 portion excluding the area 1411 is the target image display area. And

  FIG. 16 shows an example of a synthesized image composed of four images synthesized by the synthesis unit 106 and output to the monitor 120. Reference numerals 1600a, 1600b, 1600c, and 1600d show examples of images of channel a, channel b, channel c, and channel d, respectively. With respect to channel a and channel d, attention areas 1601, 1602, and 1603 exist, and therefore, a clipped image of the attention area of the corresponding image has a different image quality from the reference image, and 1611, 1612, and 1613 are displayed in the attention image display area of the corresponding image. Is displayed. In order to make it easy to visually recognize the correspondence between the attention area of the corresponding image and the attention area in the reference image, lines connecting the center points of the two areas are also displayed as 1621, 1622, and 1623. For channel b and channel c, there is no MB using motion guarantee in the image at time (t) in the image data obtained from the camera 110b and camera 110c, and the attention area is generated from the attention area external setting unit 108. An example in which there is no input to the sections 104b and 104c is shown. Since the attention area has not been generated by the attention area generation units 104b and 104c, the image at the time (t) reduced by the attention image forming sections 1105b and 1105c is input to the synthesis unit 106. The synthesizing unit 106 synthesizes the images 1600a, 1600b, 1600c, and 1600d to generate a synthesized image 1000.

  As described above, according to the image decoding / display device 130 of the present embodiment, when a plurality of monitoring images are displayed on one monitoring monitor 120, even when an event to be noticed simultaneously occurs in the plurality of monitoring images. By displaying the event image in a different area with an image quality different from that of the image being monitored, it is possible to determine which event on which monitoring object has occurred without obscuring the normal monitoring area. It can make it easy to visually recognize.

  In the above description, the numbers of the cameras 110a to 110d and the decoders 102a to 102d, the memories 103a to 103d, the attention area generation sections 104a to 104d, the attention area synthesis sections 105a to 105d, and the attention image forming sections 1105a to 1105d are shown. Although the example of 4 is described, other input numbers can be similarly implemented.

  In the above description, the attention area generation units 104a to 104d generate the attention area based on the motion by generating the correspondence of the MB used in the motion guarantee. However, other motion detection methods can be similarly implemented. It is.

  In the present invention, when a plurality of monitoring images are displayed on one monitoring monitor and an event to be noticed occurs simultaneously on the plurality of monitoring images, the image is displayed on the monitoring image with a different image quality from the image being monitored. By superimposing the event occurrence areas, it is possible to make it easier to visually recognize at which position of which monitoring target the event has occurred, and monitoring is performed by simultaneously displaying a plurality of input images on the imaging device. It can be applied to monitoring systems.

1 is a block diagram showing a schematic configuration of an image decoding / display apparatus according to Embodiment 1 of the present invention. The figure which shows the specific example of the image decoded on the memory in case the several digitally compressed image is input from the camera of the image decoding and display apparatus of FIG. The figure which shows the specific example of the movement of the object in the group of a certain image decoded on the memory of the image decoding and display apparatus of FIG. The figure which showed the specific example of the motion of a corresponding macroblock in the group of a certain image decoded on the memory of the image decoding and display apparatus of FIG. Flow chart for explaining operation of attention area generation in the image decoding / display apparatus of FIG. Explanatory drawing of attention area generation by movement in the image decoding / display apparatus of FIG. The figure which shows the result of attention area generation by attention area generation in the image decoding / display apparatus of FIG. Flowchart for explaining the operation of region-of-interest synthesis in the image decoding / display device of FIG. The figure which shows the specific example of attention area synthesis | combination in the image decoding and display apparatus of FIG. The figure which shows the specific example of the synthesized image in the image decoding and display apparatus of FIG. FIG. 3 is a block diagram showing a schematic configuration of an image decoding / display apparatus according to Embodiment 2 of the present invention. FIG. 11 is a flowchart for explaining the operation of the attention area forming unit in the image decoding / display apparatus of FIG. The figure which shows the specific example of the output result of the attention area | region formation part in the image decoding and display apparatus of FIG. The figure which shows the structural example of the image at the time of 4 screen output in the image decoding and display apparatus of FIG. The figure which shows the specific example of the output result of the attention area | region formation part in the image decoding and display apparatus of FIG. The figure which shows the specific example of the synthesized image in the image decoding and display apparatus of FIG.

Explanation of symbols

100, 130 Image decoding / display device 101 Interfaces 102a, 102b, 102c, 102d Decoders 103a, 103b, 103c, 103d Memory 104a, 104b, 104c, 104d Region-of-interest generators 105a, 105b, 105c, 105d Region-of-interest combiner 106 Compositing Unit 107 operation input unit 108 attention area external setting section 110a, 110b, 110c, 110d camera 111 network 120 monitoring monitor 1105a, 1105b, 1105c, 1105d attention image forming section

Claims (3)

An interface that captures digital image data of multiple channels from the outside,
A plurality of decoders provided for each channel and configured to decode at least two kinds of digitally compressed image data input by the interface;
A plurality of memories corresponding one-to-one with each of the plurality of decoders, each of which temporarily holds at least two types of image data output from the corresponding decoder;
A plurality of regions of interest that correspond one-to-one with each of the plurality of decoders, and that each generate a region of interest based on motion information at the time of decoding of the corresponding decoder and information set by a region of interest external setting unit A generator,
Each of the plurality of attention area generation units has a one-to-one correspondence, and when each attention area is generated by the corresponding attention area generation section, each of the two or more attention area generation units Select one from the image data, cut out an image corresponding to the attention area generated by the corresponding attention area generation unit to create a attention area image, A plurality of region-of-interest synthesis units to be synthesized,
A combining unit that combines the image data output from each of the plurality of memories and the plurality of attention region combining units and outputs the combined image data to a display terminal;
An operation input unit that receives external input from the user and inputs input information from the user to the plurality of attention area external setting units;
An attention area external setting section that converts external input from the user input from the operation input section into area information of an image, and sets each of the plurality of attention area generation sections;
An image decoding / display device comprising:   Instead of the attention area synthesis unit, each of them generates an attention area image by cutting out an image corresponding to the attention area generated by the corresponding attention area generation unit, and the other areas existing in the corresponding memory. The image decoding / display device according to claim 1, further comprising a plurality of target image forming units that generate images in association with image data. The image decoding / display device according to claim 1 or 2,
A plurality of cameras each capable of digital compression of two or more different image quality and outputting digitally compressed images;
A display terminal for visually displaying image data output from the image decoding / display device;
Monitoring system with.

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