JP2006033009A - Video processor and video monitoring system employing it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video processor capable of realizing high precision video comparison in a system transmitting a video image through a communication line having a band varying with time by extracting the video parameters at a first time, decompressing the compression data at a second time prestored such that the video parameters at the second time match the video parameters at the first time, and then comparing the video information at the first time with the video information at the second time when the video parameters matched each other. <P>SOLUTION: A video decoding section 4b generates newest video image by decompressing compressed data, a resolution extracting section 4e extracts resolution information from the compressed data, a comparison video image generating section 4f generates a past video image by decompressing compressed data in the past stored at a storage section 4d such that the resolution coincides with that of the extracted compression data, a video image comparing section 4c determines difference video image data by comparing the newest video image with a past image, and a video image difference analyzing section 4g generates a difference video image by generating difference stage information L based on the difference video image data and distributes it to an analysis terminal 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video processing apparatus for monitoring accidents and disasters in roads, rivers or power related facilities, and a video monitoring processing system using the same.

  In the conventional video processing apparatus, the video to be monitored at the first time transmitted from the surveillance camera and the video to be monitored at the second time before the first time stored in the storage medium or the like in advance. And the difference video information is created, and an abnormality is detected on the basis of the change amount of the video in the difference video information, and an alarm is generated (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2003-87773 (page 3, FIG. 2)

  When video is transmitted via a general communication line whose usable bandwidth varies over time, if the resolution, which is an example of the video parameter, is transmitted at a constant resolution, the bandwidth becomes high when the usable bandwidth becomes narrow. Since the video with the resolution cannot be transmitted, only the low-resolution video can be transmitted, and the bandwidth cannot be effectively used. Therefore, if the resolution is changed temporally in accordance with the fluctuation of the usable bandwidth in order to effectively use the bandwidth of the communication line, the video parameters at the first time and the second time are different, and the conventional video processing device In the case of applying the video, videos of different video parameters are compared with each other, and there is a problem that the accuracy of video comparison is lowered.

  The present invention has been made to solve the above-described problems. The video parameter at the first time is extracted, and the video information at the second time that has been stored in a storage medium or the like in advance is extracted. And converting the video parameters to match the video parameters at the first time, and generating differential video information from the video information at the first time and the video information at the second time that match the video parameters. An object of the present invention is to provide a video processing apparatus capable of realizing high-precision video comparison.

  The video processing apparatus according to the present invention stores extraction means for extracting video parameters at a first time from video information whose video parameters fluctuate in time, and video information at a second time before the first time. Storage means for converting, video information at the second time stored in the storage means, conversion means for converting the video parameters to match the video parameters at the first time extracted by the extraction means, The first comparison means for generating the difference video information by comparing the video information at the second time with the video information at the second time converted by the conversion means.

  According to the present invention, the video parameter at the first time is extracted, and the video information at the second time stored in the storage medium or the like in advance is matched with the extracted video parameter at the first time. By converting to be a parameter, the difference video information can be obtained from the video information at the first time and the video information at the second time when the video parameters match, so that high-precision video comparison can be realized. A video processing apparatus can be provided.

  According to the present invention, the video parameter of the first time image on which the position information indicating the predetermined position is superimposed is extracted, and the second time video information stored in the storage medium or the like is extracted in advance. The difference video information is obtained from the video information at the first time and the video information at the second time that match the video parameters by converting the video parameters to match the video parameters at the first time. Can do. Further, the position information at the first time is separated from the image information at the first time, and the position information at the second time is separated from the image information at the second time previously stored in the storage medium or the like. Since the difference position information can be obtained by comparing with the position information at the time of 1, it is possible to provide an image processing apparatus capable of realizing a highly accurate image comparison and position comparison.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. In the first embodiment, a case where the video processing apparatus according to the present invention is applied to a video monitoring processing system for monitoring a plant or the like will be described as an example.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a video surveillance system to which a video processing apparatus according to the present invention is applied. The surveillance cameras 1 are installed at a plurality of points and take images of a plant or the like (not shown) as a monitoring target, and the taken images are processed by the image monitoring device 2 installed at each point. The video data of each point processed by the video monitoring device 2 is sent via the communication line 3 to the processing server 4 which is a video processing device. The processing server 4 creates difference video information and difference stage information from the latest video for each point and past video accumulated in advance, and distributes it to the analysis terminal 5 as detection means at a plurality of monitoring points. The analysis terminal 5 normally displays the latest video on the monitor monitor, but when an abnormality occurs, the analysis terminal 5 displays the difference video information on the monitor instead of the latest video or in addition to the latest video, and notifies the monitor of the alarm.

  Next, the operation will be described. An analog video signal 11 to be monitored taken by the monitoring camera 1 is passed to the video monitoring device 2 at each shooting point. FIG. 2 is a block diagram showing the video monitoring apparatus 2. The delivered analog video signal 11 is converted into digital video data 2a1 by the video A / D processing unit 2a. The converted video data 2a1 is delivered to the video encoder processing unit 2b. The video encoder processing unit 2b compresses the digital video data 2a1 in accordance with a predetermined encoding method such as MPEG or JPEG while temporally changing the resolution as the video parameter based on the control signal 2c1 from the video transmission control unit 2c. The compressed data 2b1 is transferred to the video transmission control unit 2c. The compressed data 2b1 is subjected to IP packetization processing in the video transmission control unit 2c so as to be adapted to the communication line 3 whose band fluctuates with time, and is transmitted as packet data 2c2 in order of input time.

The operation of the video encoder processing unit 2b in the video monitoring device 2 will be described. The video transmission control unit 2c detects the usable bandwidth B (hereinafter referred to as B) of the communication line 3 at predetermined time intervals, and outputs a control signal 2c1 to the video encoder processing unit 2b based on B. As described above, the video encoder processing unit 2b compresses the video data 2a1 with the resolution, which is the video parameter, of “Hi”, “Middle”, or “Low” based on the control signal 2c1. Note that when the resolution is Hi, the video is high resolution, when the resolution is Low, the resolution is low, and when it is Middle, the video is an intermediate resolution. Specifically, the video transmission control unit 2c is provided with predetermined threshold values B _T1 and B _T2 (B _T1 <B _T2 ). If the relationship between B and the threshold value is B _T2 ≦ B, the control signal 2c1 The video encoder processor 2b performs compression so that the resolution of the compressed data 2b1 is “Hi”. If B _T1 ≦ B <B _T2 , the compression is performed so that the resolution is “Middle”, and if B <B _T1 , the compression is performed so that the resolution is “Low”. In this way, the usable bandwidth B of the communication line 3 that fluctuates with time is detected by the video transmission control unit 2c, and the video encoder processing unit 2b changes the resolution with time according to the control signal 2c1 according to the detection result. Compress the video. At this time, the resolution information represented by Hi, Middle, and Low is embedded in the header of the packet data 2c2 to be transmitted.

  The packet data 2c2 is received by the processing server 4 via the communication line 3. FIG. 3 is a block diagram showing the processing server 4. The packet data 2c2 is converted into compressed data 2b1 by the video reception control unit 4a. The compressed data 2b1 received at an arbitrary time that is the first time is transferred to the video decoder processing unit 4b and decompressed by a predetermined decoding method corresponding to the encoding method compressed by the video monitoring device 2. The expanded video data is transferred as the latest video 4b1 to the video comparison unit 4c as the first comparison means.

  Further, the compressed data 2b1 is accumulated in the accumulating unit 4d which is an accumulating unit and is also passed to the resolution extracting unit 4e which is an extracting unit. The resolution extraction unit 4e extracts the resolution information 4e1 of the latest video 4b1 embedded in the header or the like of the compressed data 2b1, and passes it to the comparison video generation unit 4f that is a conversion unit. Based on the extracted resolution information 4e1, the comparison video generation unit 4f uses the past compressed data 2b1 corresponding to the video information at the second time stored in the storage unit 4d in advance as the video information at the first time. The image is expanded so as to have the same resolution as the latest video 4b1. For example, when the resolution information 4e1 is “Middle”, the comparison video generation unit 4f generates the past video 4f1 by expanding the past compressed data 2b1 stored in the storage unit 4d so that the resolution becomes “Middle”. .

  The past video 4f1 generated by the comparative video generation unit 4f is transferred to the video comparison unit 4c. The video comparison unit 4c compares the past video 4f1 and the latest video 4b1 by pattern matching, and generates differential video data 4c1 that is differential video information. FIG. 4 is a diagram for explaining how the differential video data 4c1 is generated. FIG. 4A shows a past video 4f1 obtained by photographing the monitoring object O. If it is assumed that there is no abnormality in the monitoring target O and the latest video 4b1 is the same video as the past video 4f1, no difference video data 4c1 is output as shown in FIG. Note that the dotted line in FIG. 4B does not appear in the video. On the other hand, an abnormality occurs in the monitoring target O in the latest video 4b1, and for example, as shown in FIG. 4C, the monitoring target O is divided into three parts O1, O2, and O3, and only the positions of O1 and O3 are changed. Assuming that In this case, as shown by the solid line in FIG. 4C, the difference video data 4c1 shows the images before and after the change of the portions of O1 and O3 whose position has changed, and the portion of O2 shown by the dotted line whose position has not changed is It does not appear in the video.

  The difference video data 4c1 is transferred to the video difference analysis unit 4g to obtain the data amount of the difference video data 4c1, that is, the video difference. The video difference analysis unit 4g obtains the difference stage information L based on the predetermined setting information and the video difference.

A flowchart showing a specific operation of the video difference analysis unit 4g is shown in FIG. The video difference analysis unit 4g first performs binarization processing of the difference video data 4c1 in step ST1. Next, as a result of the binarization, the total area S of the video images having a difference is calculated in step ST2. This area S corresponds to a video difference. Further, difference stage information L indicating which stage the video difference is in is generated based on the area S and predetermined setting information in which the video data amount is defined in stages. Specifically, it is assumed that there are _four threshold values t ₁ , t ₂ , t ₃ , and t ₄ that define the setting information, and these are t ₄ > t ₃ > t ₂ > t ₁ . And to these no threshold t ₄ and the area S to not step ST3 and t ₁ are sequentially compared in ST6, the difference stage information L from 1 in accordance with the magnitude relationship until 5 is determined. The larger the value of L, the larger the video difference. Finally, in step ST7, the difference video data 4c1 is added with the difference stage information L and compressed, and the difference video 4g1 is distributed to the analysis terminal 5 which is a detection means.

  The difference video 4g1 distributed from the processing server 4 is received by all the analysis terminals 5 at a plurality of monitoring points. The analysis terminal 5 receives the packet data 2c2 from the video monitoring apparatus 2 via the communication line 3. FIG. 6 is a block diagram showing the analysis terminal 5. When the difference video 4g1 is not distributed from the processing server 4, the analysis terminal 5 converts the received packet data 2c2 into compressed data 2b1 by the distribution control unit 5a. The compressed data 2b1 is expanded to the latest video 4b1 by the video information dividing unit 5b, and the expanded latest video 4b1 is transferred to the monitor monitor 5d as display information 5b1 and displayed as a live video to be monitored.

  On the other hand, when the differential video 4g1 is distributed from the processing server 4, the differential video 4g1 passes through the distribution control unit 5a as it is and is expanded by the video information dividing unit 5b. In this case, the expanded data is the differential video data. 4c1 and difference stage information L are divided, and the difference stage information L is passed to the video difference alarm detection unit 5c.

  In the video difference alarm detection unit 5c, the difference stage information L is compared with a predetermined threshold T, and when L exceeds T, it is determined that an abnormality has occurred and the alarm information 5c1 is generated. For example, if T = 3, alarm information 5c1 is generated when difference stage information L = 4 or L = 5. The alarm information 5c1 displays that the alarm has occurred on the monitoring monitor 5d and notifies the monitoring staff of the occurrence of the alarm, and is passed to the video information dividing unit 5b to monitor the divided difference video data 4c1 as display information 5b1. Displayed on the monitor 5d.

  As described above, in the first embodiment, the processing server 4 extracts the resolution information 4e1 of the latest video 4b1, and based on the extracted resolution information 4e1, the past video 4f1 having the same resolution as the latest video 4b1 from the past compressed data 2b1. And the latest video 4b1 and the past video 4f1 are compared. Therefore, even in a system in which the bandwidth of the communication line 3 fluctuates and the resolution of the video to be monitored fluctuates with time, it is possible to always obtain a differential video by comparing videos having the same resolution. Highly accurate video comparison can be realized. Also, by performing alarm detection based on video differences, video monitoring can be automated, and system costs related to monitoring such as resident monitoring can be suppressed.

  In the first embodiment, the case where a plurality of surveillance cameras 1 and a plurality of video surveillance apparatuses 2 are provided has been described. However, a plurality of surveillance cameras 1 and video surveillance apparatuses 2 are not necessarily required. For example, when there is only one shooting point to be monitored, only one monitoring camera 1 and one video monitoring device 2 are required. Moreover, although the case where a plurality of analysis terminals 5 are provided has been described, this is not necessarily required. For example, if there is only one place for monitoring, only one analysis terminal 5 is required.

  In the first embodiment, the video transmission control unit 2c detects the state of the communication line 3 and changes the resolution according to the temporal variation of the usable bandwidth B. However, this is not always necessary. . For example, the resolution may be instructed from the analysis terminal 5 to the video monitoring apparatus 2 through the communication line 3. That is, the video transmission control unit 2c may receive an instruction regarding the resolution sent from the analysis terminal 5, and the video data processing unit 2b may compress the video data 2a1 with the resolution instructed by the control signal 2c1.

  In the first embodiment, the latest video 4b1 that is the video at the first time and the past video 4f1 that is the video at the second time are compared. However, the first time and the second time are described. The video of is not necessarily the latest video and the past video. For example, the image at the first time may be a past image for a predetermined time, and specifically, an image once accumulated in the accumulation unit 4d. The video at the second time may be a video of the monitoring object O at a time before the video at the first time, and there is no restriction on the time interval between the first time and the second time.

  In the first embodiment, the resolution of data to be compressed by the video encoder processing unit 2b of the video monitoring device 2 has been described as three levels, Hi, Middle, or Low. However, this need not necessarily be three levels. . For example, the resolution may be in N stages (N: a natural number of 2 or more), and the more N, the more precise control can be performed according to the change in the bandwidth of the communication line 3, thereby improving the bandwidth utilization efficiency. it can. Similarly, in the first embodiment, the video difference analysis unit 4g sets the difference stage information L to 5 stages. However, the difference stage information L is not necessarily 5 stages, and may be M stages (M: a natural number of 2 or more). That's fine. Since the occurrence of abnormality can be detected more accurately as the number of stages M increases, alarm detection with fewer errors can be realized.

  In the first embodiment, it has been described that the past compressed data is stored in the storage unit 4d in advance. However, this may be updated at regular time intervals or irregularly. For example, an update instruction may be given from a monitoring person (not shown), or a configuration in which an update is always performed every time an image with the maximum resolution is received may be employed. Or it is good also as a structure updated at a fixed time interval.

  In the first embodiment, the difference level data L is obtained after the difference image data 4c1 is binarized by the difference image analysis unit 4g. However, this is not always necessary. For example, the difference stage information L may be obtained by paying attention to the color in the difference video data 4c1. Specifically, if white or black is detected as the color of the difference video data 4c1, it is determined that smoke has occurred, and if red or yellow is detected, it is determined that a fire has occurred and L is set to the highest level. Good. As a result, it is possible to realize advanced alarm detection that can cope with various abnormalities flexibly.

  In the first embodiment, the analysis terminal 5 receives the packet data 2c2 from the video monitoring apparatus 2 via the communication line 3. However, the packet data 2c2 is distributed to the analysis terminal 5 via the processing server 4. It is good also as what is done. When the packet data 2c2 is sent to the processing server 4 and then distributed, the amount of data on the communication line 3 can be reduced and the use efficiency of the line can be improved as compared with the case where the data is directly sent to each analysis terminal 5. it can.

  In the first embodiment, the processing server 4 distributes the difference video 4g1 to all the analysis terminals 5. However, it is not always necessary to distribute the difference video 4g1 to all the analysis terminals 5. For example, the monitoring staff at each monitoring point may send a distribution request to the processing server 4 through the analysis terminal 5, and the processing server 4 may distribute the difference video 4g1 only to the analysis terminal 5 that has made the distribution request. In this case, since it is not necessary to distribute the differential video 4g1 to all the analysis terminals 5, it is possible to reduce the amount of data to be distributed and improve the line utilization efficiency.

  In the first embodiment, the analysis terminal 5 compares the difference stage information L with the predetermined threshold value T for alarm detection. However, the analysis terminal 5 does not necessarily perform alarm detection. . For example, if there is only one monitoring place, the processing server 4 can perform alarm detection by providing the processing server 4 with a configuration corresponding to the video difference alarm detection unit 5b. As a result, it is not necessary to distribute the difference video 4g1, so that an equivalent alarm detection effect can be realized with a simple configuration.

  In the first embodiment, the resolution of the latest video 4b1 and the resolution of the past video 4f1 are made to coincide with each other. However, this need not necessarily be the resolution. For example, it may be a video component.

  When matching the video components, the resolution extraction unit 4e extracts the luminance signal and the color difference signal which are the video component information of the received compressed data 2b1, and based on this, the past compressed data stored in advance in the storage unit 4d The comparison video generation unit 4f expands 2b1 so as to be the same luminance signal and color difference signal as the latest video 4b1. Thereby, it is possible to obtain the difference video data 4c1 by comparing the videos having the same video component.

Embodiment 2. FIG.
In the first embodiment, the resolution of the latest video 4b1 is matched with the resolution of the past video 4f1, but this does not necessarily have to be the resolution. For example, there may be image quality. Even in the case of matching the image quality, the resolution extraction unit 4e extracts the image quality of the received compressed data 2b1 in the same manner as in the case of matching the resolution, and based on this, the past compression previously stored in the storage unit 4d is extracted. The comparison video generation unit 4f expands the data 2b1 so as to have the same image quality as the latest video 4b1. As a result, it is possible to obtain the difference image data 4c1 by comparing the images having the same image quality.

As an example of matching the image quality, for example, when JPEG2000 is applied as the image encoding method, the partial image quality can be matched. Specifically, in JPEG2000, a large amount of code can be allocated only to a specific area (part) of a video by a technique called ROI (Region of Interest). Thus, the accuracy of abnormality detection for the monitoring target can be improved. FIG. 7 is a diagram for explaining the improvement of the detection accuracy. In FIG. 7, the allocation of the code amount of the portion P _o surrounded by the dotted square is increased for the video P of the monitoring target O at a certain time. Then since appears as a change in the image even slight changes to become a high-quality in P _o, it is possible to improve the abnormality detection precision of the monitored O. At this time, since the video amount of the portion other than _Po is relatively small, for example, when the person Q simply passes the background of the monitoring target O as shown by an arrow, the video of the monitoring target O is displayed. Even if there is a change that is not abnormal, it does not appear as a change in the image. For this reason, it is not necessary to erroneously detect an abnormality. That is, erroneous detection of abnormality can be reduced.

  In the first embodiment or the second embodiment, only one of the resolution, the image quality, and the video component is matched as the video parameter of the compressed data 2b1, but this is not necessarily the only video parameter. Not limited to this, a plurality of video parameters may be matched. For example, by matching the resolution and further matching the image quality, more accurate video comparison can be performed, so that the accuracy of alarm detection can be improved.

Embodiment 3 FIG.
In the first embodiment, the processing server 4 receives and processes the video captured by the monitoring camera 1 via the communication line 3, and detects an abnormality of the monitoring target based only on the difference video data 4c1 between the past video 4f1 and the latest video 4b1. It was set as the structure to do. In the third embodiment, a position sensor is attached to a monitoring target, and position information is used as additional information. In other words, by detecting the movement of the monitoring target from the change in position information by the position sensor, and further displaying the position of the position sensor on the video, it is possible to easily recognize where the monitoring target has moved, It makes it easy to specify the position of the monitoring target.

  FIG. 8 is a block diagram showing the configuration of the video monitoring system in the third embodiment, which corresponds to FIG. 1 in the first embodiment. In FIG. 8, the monitoring target has K position sensors 81 to 8K for each photographing point, and is attached to an important unit or the like to be monitored. The position sensors 81 to 8K are specifically GPS (Global Positioning System) receivers, and output latitude and longitude as position information. The position information which is the output of the position sensors 81 to 8K is passed to the video monitoring apparatus 2. FIG. 9 is a block diagram showing the configuration of the video monitoring apparatus 2 in the third embodiment, which corresponds to FIG. 2 in the first embodiment. Note that parts having the same functions as those in FIG. In FIG. 9, the position information transferred to the image monitoring device 2 is superimposed on the image data 2a1 transferred from the image A / D processing unit 2a by the image / position encoder processing unit 2g, and compressed according to a predetermined encoding method. As in the first embodiment, the compressed data 2g1 is subjected to IP packetization processing in the video transmission control unit 2c so as to be compatible with the communication line 3 whose bandwidth varies with time, and is arranged in the order of input time to be packet data 2c2. As sent.

  The packet data 2c2 is received by the processing server 4 via the communication line 3. FIG. 10 is a block diagram showing the processing server 4 in the third embodiment, which corresponds to FIG. 3 in the first embodiment. Note that portions having the same functions as those in FIG. The packet data 2c2 is converted into compressed data 2g1 by the video reception control unit 4a as in the first embodiment. The compressed data 2g1 is decompressed by the video / position decoder processing unit 10a, which is a separating unit, and is separated into the latest video 10a1 and the latest position information 10a2. Of these, the latest video 10a1 is transferred to the video comparison unit 4c, while the latest position information 10a2 is transferred to the position comparison unit 10b as the second comparison means.

  The resolution extraction unit 4e extracts the resolution information 4e1 of the compressed data 2g1 and passes it to the comparison video / position generation unit 10c which is a conversion / separation unit. In the comparison video / position generation unit 10c, the past compressed data 2g1 stored in advance in the storage unit 4d is expanded so as to have the same resolution as that of the latest video 10a1, and further separated into the past video 10c1 and the past position information 10c2. To do. Of these, the past position information 10c2 is passed to the position comparison unit 10b, while the past video 10c1 is passed to the video comparison unit 4c after the marker corresponding to the past position information 10c2 is mapped to the past video 10c1.

  FIG. 11 is a diagram for explaining how the marker corresponding to the past position information 10c2 is mapped to the past video 10c1. FIG. 11A shows the past video 10c1, and the monitoring target O is assumed to include K = 2 position sensors 81 and 82. FIG. In the comparison video / position generation unit 10c, the past video 10c1 is divided into meshes as shown in FIG. Then, the position information prepared in advance based on the map around the monitoring target O is associated with each mesh of the divided past video 10c1. That is, the latitude and longitude of each mesh is determined. Next, the position information of each mesh and the position information of the position sensors 81 and 82 are sequentially compared to search for a mesh with matching position information. Then, assuming that the meshes with the matching position information are portions where the position sensors 81 and 82 exist, the markers 111 and 112 indicated by hatching are mapped to the past video 10c1. Since the markers 111 and 112 are mapped based on the position information of the position sensors 81 and 82 as described above, the position sensors 81 and 82 themselves do not need to be shown in the image.

  As in the first embodiment, the video comparison unit 4c compares the past video 10c1 and the latest video 10a1 having the same resolution by pattern matching to generate differential video data 4c1, and passes it to the video / position difference analysis unit 10d. In the comparison in the video comparison unit 4c, the markers 111 and 112 mapped to the past video 10c1 are ignored. That is, the past video 10c1 is compared with the latest video 10a1 on the assumption that there is no marker.

  On the other hand, the position comparison unit 10b compares the past position information 10c2 and the latest position information 10a2, and generates difference position information 1 to K. Here, the differential position information 1 to K corresponds to information indicating the position of the latest position sensors 81 to 8K with respect to the positions of the past position sensors 81 to 8K, and specifically, each of the position sensors 81 to 8K. Corresponds to the moved vector. The generated difference position information 1 to K is transferred to the video / position difference analysis unit 10d as difference position data 10b1.

  In the video / position difference analysis unit 10d, the data amount of the differential video data 4c1 passed from the video comparison unit 4c, that is, the video difference is obtained as in the first embodiment. When obtaining the video difference, the markers 111 and 112 are ignored as in the video comparison in the video comparison unit 4c, and the data amount of the difference video data 4c1 is obtained as the video difference. Next, the video / position difference analysis unit 10d maps a marker to a mesh at a position corresponding to the latest position sensors 81 to 8K in the difference video data 4c1. This mapping is shown in FIG. As shown in FIG. 11C, two vectors 111a and 112a, which are differential position data 1 and 2 indicated by arrows, are added to the markers 111 and 112 corresponding to the past position information 10c2, respectively. Then, the markers 113 and 114 are mapped on the assumption that the mesh at the position obtained by adding these two vectors is the position where the latest position sensors 81 and 82 exist.

The video / position difference analysis unit 10d obtains a position difference based on the difference position data 10b1. Position difference, to no differential position information 1 the sum of the absolute value of K, i.e. the sum S _p of from the position sensor 81 a distance which each 8K has moved. Then, in the image-position difference analysis part 10d, together with obtaining the difference stage information L based on the predetermined setting information and video difference as in the first embodiment, by using a predetermined setting information 2 also position difference S _p position Step information L _p is obtained.

A flowchart showing a specific operation for obtaining the position stage information L _p is shown in FIG. Specifically, it is assumed that the threshold values defining the setting information 2 are, for example, _four of p ₁ , p ₂ , p ₃ , and p ₄ , and these are p ₄ > p ₃ > p ₂ > p _1. if, to the position difference _{S p} and these no threshold _{p 1} sequentially compares the _{p 4} in steps ST8 ST11, the position phase information _{L p} from 1 depending on the magnitude relationship until 5 is determined. As the value of L _p is large, indicating that the position difference is large. And by adding positional phase information L _p in the difference image data 4c1 and differential phase information L is compressed at step ST12, delivery to all analyzes terminal 5 as differential image 10d1.

The difference video 10d1 distributed from the processing server 4 is received by the analysis terminal 5 at a plurality of monitoring points. FIG. 13 is a block diagram illustrating the analysis terminal 5 according to the third embodiment, and corresponds to FIG. 6 according to the first embodiment. Note that parts having the same functions as those in FIG. When the difference video 10d1 is not distributed from the processing server 4, the analysis terminal 5 converts the received packet data 2c2 into compressed data 2g1 by the distribution control unit 5a. The compressed data 2g1 is expanded to the latest video 10a1 by the video information dividing unit 5b, and the expanded latest video 10a1 is transferred to the monitoring monitor 5d as display information 5b1 and displayed as a live video to be monitored. On the other hand, when the differential video 10d1 is distributed from the processing server 4, the differential video 10d1 passes through the distribution control unit 5a as it is and is expanded by the video information dividing unit 5b. In this case, the expanded data is the differential video data. 4c1, it is divided into the difference stage information L and the position phase information L _p, differential phase information L and the position phase information L _p is passed to the video-position difference alarm detector 13a.

In the video / position difference alarm detection unit 13a, the difference stage information L is compared with a predetermined threshold T as in the first embodiment, and when L exceeds T, it is determined that an abnormality has occurred and an alarm is generated. Information 13a1 is generated. Furthermore, in the third embodiment, the video / position difference alarm detection unit 13a compares the position stage information L _p with a predetermined threshold value T _p, and even if L does not exceed T, L _p is equal to T If it exceeds _p , it is determined that an abnormality has occurred and alarm information 13a1 is generated. For example, if T _p = 3, the alarm information 13a1 is generated when L _p = 4 or L _p = 5. The alarm information 13a1 displays on the monitor monitor 5d that an alarm has occurred and notifies the monitoring staff of the occurrence of the alarm, and is passed to the video information dividing unit 5b to monitor the divided difference video data 4c1 as display information 5b1. Displayed on the monitor 5d. In the third embodiment, since the differential video data 4c1 includes markers corresponding to the differential video and the positions of the position sensors 81 to 8K, the monitor monitors the position of the important target unit to which the position sensor is attached. This can be easily confirmed on the monitor 5d.

  As described above, in the third embodiment, the position information from the position sensors 81 to 8K of the monitoring target is used to issue a warning based on the change in the position information when the position sensor moves. Therefore, even when the video difference is small, a warning is generated if the position change of the monitoring target is large, so that high-precision video comparison and position comparison can be realized. In addition, since the position sensor is attached to the important unit to be monitored, even if the plant or the like collapses, it is possible to easily recognize where the important unit has moved and to specify the position.

In the third embodiment, the OR when the difference stage information L exceeds a predetermined threshold T or the position stage information L _p exceeds a predetermined threshold T _p in the video / position difference alarm detection unit 13a. it is assumed that an alarm information 13a1 under the conditions, these aND condition, i.e. both L and L _p may be as alarm information 13a1 occurs if it exceeds T and T _p respectively.

  By the way, in the above description, the case where the video processing apparatus according to the present invention is applied to a video monitoring system that monitors a plant or the like has been described. However, the present invention is not limited to a plant or the like, and is also applicable to a system that monitors roads and rivers. Needless to say, it can be applied. Needless to say, the present invention is not limited to a system that monitors video, but can be applied to any system that processes video.

1 is an overall block diagram of a video surveillance system showing Embodiment 1 of the present invention. It is a block diagram which shows the image | video monitoring apparatus used for Embodiment 1 of this invention. It is a block diagram which shows the processing server used for Embodiment 1 of this invention. It is a figure explaining a mode that the difference video data in Embodiment 1 of this invention is produced | generated. It is a flowchart which shows the process performed in the video difference analysis part in Embodiment 1 of this invention. It is a block diagram which shows the analysis terminal used for Embodiment 1 of this invention. It is a figure explaining the effect at the time of making the partial image quality in Embodiment 2 of this invention correspond. It is a whole block diagram of the image | video monitoring system which shows Embodiment 3 of this invention. It is a block diagram which shows the image | video monitoring apparatus used for Embodiment 3 of this invention. It is a block diagram which shows the processing server used for Embodiment 3 of this invention. It is a figure explaining a mode that a marker is mapped on the position of the position sensor in Embodiment 3 of this invention. It is a flowchart which shows the process performed in the video difference analysis part in Embodiment 3 of this invention. It is a block diagram which shows the analysis terminal used for Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surveillance camera 2 Video processing apparatus 3 Communication line 4 Processing server 4c which is a video processing apparatus Video comparison part 4d which is a first comparison means Storage part 4e which is a storage means Resolution extraction part 4f which is an extraction means Comparison which is a conversion means Video generation unit 5 Analysis terminal 81 to 8K as detection means Position sensor 10a Video / position decoder processing unit 10b as separation means Position comparison unit 10c as second comparison means Comparison video / position generation unit as conversion separation means

Claims (5)

  Extraction means for extracting video parameters at a first time from video information whose video parameters fluctuate in time, storage means for storing video information at a second time before the first time, and storage means stored in the storage means Conversion means for converting the video information at the second time so that the video parameters coincide with the video parameters at the first time extracted by the extraction means, converted by the video information at the first time and the conversion means A video processing apparatus comprising: first comparison means for generating difference video information by comparing with video information at a second time.   Extraction means for extracting video parameters at a first time from video information in which video parameters fluctuate over time and position information representing a predetermined position is superimposed, and video information at a second time prior to the first time is stored The second time video information stored in the storage means is converted to be a video parameter that matches the video parameter of the first time extracted by the extraction means, and is superimposed on the video information Conversion separation means for separating position information representing a predetermined position, and first comparison means for generating difference video information by comparing the video information at the first time with the video information at the second time converted by the conversion means. Separating means for separating position information at the first time from video information at the first time, position information at the first time separated by the separating means and position information at the second time separated by the conversion separating means Difference from Image processing apparatus, characterized in that it comprises a second comparator means for generating position information.   The video processing apparatus according to claim 1, wherein the video parameter is any one of video resolution, image quality, and video component.   A video monitoring processing system comprising: the video processing device according to claim 1; and first detection means for detecting an abnormality of a monitoring target based on difference video information. A video monitoring processing system comprising: the video processing device according to claim 2; and second detection means for detecting an abnormality of a monitoring target based on difference video information or difference position information.

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