JP2001016574A - Image processing system and image processing terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an image processing system where an image processing algorithm for processing with an image processing terminal can properly be changed. SOLUTION: A monitor center 101 transmits an image processing algorithm, considered to be optimum to a camera terminal 107, to the camera terminal 107. The camera terminal 107 registers the image processing algorithm supplied form an image processing management section 110 and operates it. Since the image processing algorithm in the camera terminal 107 can properly be changed in this way, the image processing is conducted in an optimum algorithm depending on the purpose of use and the image processing with high accuracy can be attained with a high degree.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to crime prevention and accident prevention,
Regarding image processing systems such as centralized monitoring camera systems for the purpose of performing inventory management etc. with unmanned cameras,
In particular, the present invention relates to an image processing system that detects a change with time of a captured image and transmits the detection information to a monitoring center located at a remote place.

[0002]

2. Description of the Related Art In recent years, surveillance camera systems have been introduced in various fields such as crime prevention, accident prevention and inventory management. In this surveillance camera system, it is effective to operate the system using a computer at the surveillance center, which enables the storage of image information as digital data, the improvement of transmission image quality, the miniaturization of equipment, and the reduction in the number of operating personnel In addition, the cost can be significantly reduced.

The operation principle of this type of surveillance camera is as follows.
One that is always in a shooting state, one that regularly shoots at regular time intervals, one that uses a sensor as a shooting trigger, and one that obtains various information by analyzing captured image data by the camera itself is there.

[0004] Hereinafter, the operation principle of a conventional monitoring camera system in which such a camera analyzes an image by itself will be described.

FIG. 5 is a block diagram showing an example of a conventional surveillance camera system, and FIG. 6 is an image processing terminal (camera terminal) 20.
7 is a communication flowchart showing a communication procedure between the terminal control device 7 and a terminal control device (monitoring center) 201. FIG.

In FIG. 5, a camera terminal 207 has the following components. That is, an image input unit 208 having a function of converting an image (optical image) captured by a CCD or CMOS image sensor into a digital signal, and mapping the digital signal supplied from the image input unit 208 as image data on a memory. Image buffer unit 209
An image processing unit 210 having a function of analyzing digital image data mapped to the image buffer unit 209 and detecting a change in an image, and transmitting the image change data detected by the image processing unit 210 to the monitoring center 201 A data conversion unit 211 having a function of converting the data into a format for transmission or extracting desired information from data received from the monitoring center 201, and converting the data converted by the data conversion unit 211 into a communication line 206.
To the monitoring center 2 via the communication line 206.
And a communication I / F (interface) unit 212 having a function of receiving data supplied from the communication interface 01.

The monitoring center 201 has the following components. That is, when the operator sets each camera terminal 207
Terminal operation unit 2 which is a user interface for confirming a photographed image by the user and the operation state of each camera terminal 207, and performing operations for changing parameters, etc.
02, a terminal management unit 203 having a function of managing an operation state, an operation schedule, parameters for image processing, and the like of each camera terminal 207 to be controlled;
7, a data conversion unit 204 having a function of converting the data into a format for transmission in order to transmit the data or extracting desired information from the data received from the camera terminal 207.
Receive the data transmitted by the camera terminal 207,
The communication I / F unit 205 has a function of transmitting data held by the terminal management unit 203 to the camera terminal 207.

Here, the communication line 206 may be a local communication network such as a LAN in addition to a general communication network such as an ISDN or an analog public line.

The operation of the surveillance camera system having such a configuration will be described with reference to a communication flowchart shown in FIG.

First, on the monitoring center 201 side, the operator operates the terminal operation unit 202 to operate the camera terminal 207.
Specify the processing start for. At this time, the terminal operation unit 20
2 is supplied to the terminal management unit 203, and the terminal management unit 203 outputs predetermined image processing parameters corresponding to the operation information to the data conversion unit 204. The data conversion unit 204 packetizes the received image processing parameter by adding an information identification ID or the like,
Output to F section 205. The communication I / F unit 205 transmits the received data to the camera terminal 207 via the connected communication line 206 (Step 11).

On the camera terminal 207 side, first, a communication I /
The F unit 212 is connected to the monitoring center 20 via the communication line 206.
1 is received and output to the data converter 211. The data conversion unit 211 extracts the information identification ID from the received data, recognizes that the received data is an image processing parameter, extracts the parameter part, and outputs the extracted parameter part to the image processing unit 210. Image processing unit 210
Registers the received image processing parameters and uses them in the subsequent change detection processing.

Next, the monitoring center 201 generates a processing start command in the same procedure as in step 11 described above, and transmits it to the camera terminal 207. The information ID at this time indicates the processing start command, and has a value different from the information ID in the case of the image processing parameter (step 12).

The camera terminal 207 receives / recognizes the processing start command in the same procedure as described above, and
Output to 0. When the image processing unit 210 receives this command, based on the previously registered image processing parameters,
Analysis (image processing) of the image data mapped in the image buffer unit 209 is performed. Here, the image data mapped in the image buffer unit 209 is a digital image signal generated by the image input unit 208.

The image processing performed here includes, for example, comparing the RGB element or the YCbCr element between the previously photographed image and the currently photographed image to detect the difference, and comparing the difference in the spectrum waveform of each screen. By doing
A process of extracting an image change due to the passage of time (taking a difference) is exemplified.

When the image processing unit 210 detects a change in the image in this way, it outputs data (difference data) of the detection result to the data conversion unit 211. This data includes the coordinates of the detection area, image data, image difference data, and the like. The data conversion unit 211 adds the information identification ID indicating the detection result data to the data, packetizes the data, and outputs the packet to the communication I / F unit 212. Communication I /
The F section 212 transmits the packet data to the monitoring center 201 via the connected communication line 206 (step 3).

On the monitoring center 201 side, when the communication I / F unit 205 receives data from the camera terminal 207,
The data is output to the data conversion unit 204. The data conversion unit 204 recognizes that the received data is the detection result data by extracting the information identification ID of the data, extracts the detection result data, and outputs the detection result data to the terminal management unit 203. . The terminal management unit 203 accumulates the received detection result data,
Used for the next control.

Thereafter, every time an image change is detected, the monitoring center 2
01 is transmitted (step 4). If necessary, the detection result data is stored in the terminal operation unit 20.
2 to notify the operator by image or sound.

[0018]

Although such a surveillance camera system is used in various places, the size of the object to be monitored (the size relative to the screen) and the contrast between the object and the background are high. , The brightness of the entire input image,
The speed of change (moving speed) of the object, the manner of change, and the like are various, and the manner of monitoring is, as described above, always in a shooting state, taking a picture at regular time intervals, or There are various methods such as a method using a sensor as a photographing trigger, and a method in which photographed image data is analyzed by the camera itself to obtain various information.

As described above, a good surveillance image may not be obtained unless the image processing algorithm is changed depending on the monitoring target or method. Since only the algorithm is executed by a processing program registered in the camera terminal in advance, only predetermined image processing can be performed. Also, as a countermeasure, for example, a method of preparing a dedicated camera terminal for each algorithm can be considered, but preparing an individual camera terminal causes a high cost,
Further, there is a problem that it is not possible to flexibly cope with a specification change such as a case where a more effective algorithm is developed after the introduction or a case where it is desired to change the monitoring target to a different algorithm.

Accordingly, an object of the present invention is to provide an image processing system capable of appropriately changing an image processing algorithm for performing processing in an image processing terminal.

[0021]

As a means for achieving the above object, the present invention provides an image processing terminal (camera terminal) which is provided with an image processing management section for newly managing an image processing section. The processing program executed by the image processing unit can be changed to enable processing by various algorithms, and on the terminal control device (monitoring center) side, the terminal management unit causes each image processing terminal to execute a processing program (image The monitoring center transmits the image processing program to each image processing terminal when the system is in operation, and the image processing management unit of each image processing terminal receives the image processing program and receives the image processing program. And perform image processing according to an image processing algorithm executed by the image processing program.

That is, image input means for converting an image sequentially inputted in time series into digital image information, image buffer means for accumulating a plurality of the digital image information supplied from the image input means, and image buffer means Image processing means for comparing the digital image information in the past and the latest digital image information in time series to detect a change in the image, and for transmitting and receiving data via a communication line. 1st format conversion
And an image processing terminal comprising: a transmission data generating unit, a first data communication unit that transmits and receives format-converted data via a communication line; and a display unit that displays data transmitted from the image processing terminal. Terminal operation means for inputting control data by an operator, terminal management means for managing an image processing algorithm and an operation state of the image processing terminal, and format conversion for transmitting and receiving data via a communication line. A terminal control device comprising: a second transmission data generating unit for performing the communication; and a second data communication unit for transmitting and receiving the format-converted data via a communication line. The processing terminal further includes an image processing management unit that performs registration management and operation control of an image processing algorithm for performing image processing by the image processing unit. In addition, the terminal management unit of the terminal control device holds a plurality of types of the image processing algorithms, and the terminal control device transmits a desired image processing algorithm to the terminal control device, and executes the image processing algorithm. An image processing system is provided wherein the image processing algorithm received by the image processing means is registered by a management means and image processing is performed.

[0023] In addition, images sequentially input in time series are converted into digital image information and a plurality of the images are stored, and the past digital image information and the latest digital image information are compared in time series to change the image. An image processing terminal that performs image processing to detect the image data and outputs the detection data via a communication line, and a terminal control device that displays the detection data transmitted from the image processing terminal and controls the image processing terminal. , The image processing terminal further performs registration management and operation control of an image processing algorithm for performing the image processing, and the terminal control device holds a plurality of types of the image processing algorithms. The terminal control device transmits the desired image processing algorithm to the terminal control device, and the terminal control device receives the image processing algorithm. Register the serial image processing algorithm is to provide an image processing system, which comprises carrying out the image processing.

Further, in order that each functional unit of the image processing terminal and the terminal control device can easily change the processing program regardless of the type of the image processing algorithm,
Regardless of the type of algorithm to be operated, the identification ID of the transmitted image processing parameter is the same, and only the data configuration of the image processing parameter is changed.

That is, when transmitting the parameters used in the image processing algorithm, the terminal control device adds the same identification information regardless of the type of the image processing algorithm and transmits the same. Item 1
Alternatively, an image processing system according to claim 2 is provided.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image processing system according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a surveillance camera system as one application example of the image processing system according to the present invention, and FIG. 2 is an image processing terminal (camera terminal) 107.
And FIG. 3 is a communication flow diagram showing a communication procedure between the terminal control device (monitoring center) 101 and FIG. 3 is a diagram showing an example of an internal data configuration when the image processing parameter communication packet has a fixed length, and FIG. FIG. 6 is a diagram illustrating an example of an internal data configuration when a packet has a variable length.

First, in FIG. 1, a camera terminal (image processing terminal) 107 has the following components. That is, an image input unit 108 having a function of converting a video (optical image) photographed by a CCD or a CMOS image pickup device into a digital signal, and the digital signal supplied from the image input unit 108 is mapped on a memory as image data. It is composed of an image buffer unit 109 and software or hardware or a hybrid form of both, and has a function of analyzing digital image data mapped to the image buffer unit 109 according to a processing program and detecting a change in an image. Image processing unit 11
0, an image processing management unit 113 having a function of performing registration management of an image processing program performed by the image processing unit 110,
A data conversion unit 111 having a function of converting the image change data detected by the image processing unit 110 into a transmission format for transmission to the monitoring center 101, and extracting desired information from the data received from the monitoring center 101.
And a communication I / F (interface) unit 1 having a function of outputting data converted by the data conversion unit 111 to the communication line 106 and receiving data supplied from the monitoring center 101 via the communication line 106.
12.

The monitoring center (terminal control device) 10
1 has the following components. That is, the operator can select an image captured by each camera terminal 107 or
Terminal operation unit 102, which is a user interface for confirming the operation state of the camera terminal and performing operations for changing parameters, etc., and the operation state, operation schedule, image processing program (algorithm) of each camera terminal 107 to be controlled Terminal management unit 103 having a function of managing parameters for image processing,
7, a data conversion unit 104 having a function of converting the data into a transmission format in order to transmit the data, and extracting desired information from the data received from the camera terminal 207.
Receiving the data transmitted by the camera terminal 107,
The communication I / F unit 105 has a function of transmitting data held by the terminal management unit 103 to the camera terminal 107.

Here, the communication line 106 may be a local communication network such as a LAN in addition to a general communication network such as an ISDN or an analog public line.

The operation of the surveillance camera system having such a configuration will be described with reference to the communication flowchart shown in FIG.

First, on the monitoring center 101 side, the operator operates the terminal operation unit 102 to operate the camera terminal 107.
Specify the processing start for. At this time, the terminal operation unit 10
2 is supplied to the terminal management unit 103, and the terminal management unit 103
Image processing algorithm A that seems to be optimal from the data of 7
Is selected and output to the data conversion unit 104.

Here, the image processing algorithm indicates an image processing program. When the image processing in the image processing unit 110 of the camera terminal 107 is performed by software, the image processing algorithm corresponds to a software code, and the FPGA (Fie
If the processing is performed by programmable hardware such as an ld Programmable Gate Array, the circuit code corresponds. Naturally, both codes correspond to both hybrid types. In addition, a processing program in a more advanced programming language may be used, and any expression form may be used as long as the processing operation required for performing image processing in the image processing unit 110 of the camera terminal 107 is performed. . Hereinafter, this embodiment will be described as an algorithm.

The data conversion unit 104 packetizes the received image processing algorithm A by adding an information identification ID indicating the image processing algorithm to the communication I / F.
Output to the unit 105. The communication I / F unit 105 transmits the received data to the camera terminal 107 via the connected communication line 106 (Step 1).

On the camera terminal 107 side, the monitoring center 1
01 is received by the communication I / F unit 112 and output to the data conversion unit 111. The data conversion unit 111 extracts the information ID from the passed data,
It recognizes that the received data is an image processing algorithm, extracts the image processing algorithm, and outputs it to the image processing management unit 113. The image processing management unit 113 registers the received data, that is, the algorithm, in the image processing unit 110. However, at this point, since the parameters have not been acquired, the image processing unit 110 does not start the processing.

Next, on the monitoring center 101 side, the terminal management unit 103 outputs a parameter for a predetermined image processing algorithm A to the data conversion unit 104. The parameter for the image processing algorithm A is Y (luminance), Cb and Cr (color difference) of a plurality of images, and if the image processing algorithm A is image processing for detecting the difference, Y ( (Brightness) element value (usually 0 to 255) difference threshold, Cb and Cr (color difference) element value difference threshold,
Number of continuously changing pixels (vertical,
Horizontal). The data conversion unit 104 packetizes the received image processing parameter by adding an information identification ID indicating the image processing parameter to the packet.
/ F section 105. The communication I / F unit 105 transmits the image processing parameter packet to the camera terminal 107 via the connected communication line 106 (Step 2).

FIG. 3 shows an example of the internal structure of the image processing parameter packet to be transmitted. FIG. 3 shows the format of an image processing parameter packet when the parameter area 23 has a fixed length. FIG. 3A is a diagram showing the basic format, and shows a start code 21 indicating the start of a packet, and data types such as the fact that the content of the data is a parameter and what kind of algorithm parameter it is. It is composed of an information identification code 22, a fixed length parameter area 23 in which actual data (algorithm of the algorithm) is recorded, and an end code 24 indicating the end of the packet. The parameter area 23 has a size (for example, 32 bytes in this embodiment) sufficient to arrange all the parameters, regardless of the type of image processing algorithm to be downloaded.

FIG. 3B is a diagram showing an example of the internal structure of an image processing parameter packet for the image processing algorithm A, for example.
Byte, 1 Byte, 2 Byte parameters 1, 2,
3, and a predetermined value such as a null code (0x00) is set as the remaining portion of the parameter area 23 as empty. FIG. 3C is a diagram showing an example of the internal configuration of an image processing parameter packet for another image processing algorithm (image processing algorithm B). The image processing parameter packet for algorithm A shown in FIG. Are different from each other in the code content recorded in the information identification code 22, and the internal structure and data content of the parameter area 23 are different.

Upon receiving such an image processing parameter packet at the communication I / F section 112, the camera terminal 107 outputs the image processing parameter packet to the data conversion section 111, and the data conversion section 111 converts the packet into the information identification code 22 of the supplied packet data. The recorded information identification ID is taken out, the received data is recognized as an image processing parameter, the data recorded in the parameter area 23 is taken out, and output to the image processing management unit 113. At this time, the parameter area 23
Is a fixed length, the data conversion unit 111 cuts out the parameter area 23 with a predetermined size without regard to the internal configuration of the image parameter, and outputs the data including the null code recorded in the free space. Become. And
The image processing management unit 113 supplies the parameter area 23
Image processing unit 110 with the data of
Register with.

Next, the monitoring center 101 transmits a processing start command to the camera terminal 107 in the same procedure as described above. At this time, as the information ID recorded in the information identification code of the packet data, a code indicating a processing start command of the algorithm is recorded, and the information identification ID recorded in the information identification code 23 of the image processing parameter is stored. The value is different from the ID (step 3).

The camera terminal 107 receives / recognizes this processing start command in the same procedure as described above, and
13 is output. Upon receiving this command, the image processing management unit 113 starts the operation of the image processing unit 110.

Thus, the image processing unit 110 operates the image processing algorithm A supplied in the previous step 1 using the image processing parameters for the image processing algorithm A supplied in the step 2 and causes the image buffer unit 109 to operate the image processing algorithm A. Analysis (image processing) of the mapped image data is performed. At this time, the algorithm A also records the order of each parameter element from the beginning of the parameter area, so even if the data of the empty area is included, only the necessary parameters are extracted and used. can do.

Since the image data mapped to the image buffer unit 109 is a digital image signal input from the image input unit 108, the image processing performed here includes, for example, the previously captured image and the currently captured image. The processing of extracting an image change due to the passage of time (taking a difference) by comparing the RGB element or the YCbCr element and detecting a difference between the RGB elements or the YCbCr element, or comparing a difference between spectral waveforms of each screen.

When the image processing unit 110 detects a change in the image in this way, it outputs data (difference data) of the detection result to the data conversion unit 111. This data includes the coordinates of the detection area, image data, image difference data, and the like. The data conversion unit 111 adds the information identification ID indicating the detection result data to the data, packetizes the data, and outputs the packet to the communication I / F unit 112. Communication I /
The F unit 112 transmits the packet data to the monitoring center 101 via the connected communication line 106 (step 4).

On the monitoring center 101 side, when the communication I / F unit 105 receives data from the camera terminal 107,
The data is output to the data conversion unit 104. The data conversion unit 104 recognizes that the received data is the detection result data by extracting the information ID of the data, extracts the detection result data, and outputs the data to the terminal management unit 103. . The terminal management unit 103 accumulates the received detection result data,
Used for the next control.

Thereafter, every time an image change is detected, the monitoring terminal 1
01 and transmits the detection result data. If necessary, the detection result data can be output to the terminal operation unit 102 so that the operator can be notified with an image or a sound.

Next, the operation in the case where the operator instructs to change to the image processing algorithm B for comparing the difference in the spectrum waveform of each screen will be described. In this case, the image processing algorithm B divides a screen into certain blocks, performs spectrum analysis, and performs image processing for comparing the spectral waveforms of the corresponding blocks on each screen to identify a change position.

On the side of the monitoring center 101, when the operator considers that the monitoring by the image processing algorithm A is not optimal and wants to change to the image processing by the image processing algorithm B, the operator operates the terminal operation unit 102 to operate the camera. Instruct terminal 107 to change to algorithm B. At this time, the terminal operation unit 102 first outputs to the camera terminal 107 an instruction to output processing stop data for stopping the image processing operation using algorithm A, and then issues an instruction to change to algorithm B. Is output. Then, the operation information is supplied to the terminal management unit 103, and the terminal management unit 103 selects the image processing algorithm B from the registered data of the camera terminal 107,
And outputs it to the data conversion unit 104.

The data conversion unit 104 packetizes the received processing stop data and image processing algorithm B by adding an information identification ID indicating the processing stop data and the image processing algorithm to the communication I / F unit 10.
5 is output. At this time, the information identification ID indicating the image processing algorithm has the same value in the image processing algorithms A and B. Thereafter, the communication I / F unit 10
5 is a communication line 10 connected to the received data.
6 to the camera terminal 107 (step 5,
Step 6).

In the camera terminal 107, the communication I / F unit 11
2 receives the processing stop data, the data conversion unit 111
Then, the image processing management unit 113 interrupts the image processing operation by the image processing unit 110. And
Upon receiving the image processing algorithm B, the data processing unit 113 recognizes the data contents in the same manner, and the image processing management unit 113
Then, the algorithm B is registered in the register 10.

Next, on the monitoring center 101 side, the terminal management unit 103 outputs parameters for the image processing algorithm B to the data conversion unit 104. The parameters for the image processing algorithm B include, for example, a threshold value or a peak spectrum of a test process of a spectrum waveform to be compared (a process that originally determines whether two probability distributions have the same identity in the field of probability and statistics). There is a threshold value for the difference between the components. The data conversion unit 104 adds the information processing ID for the image processing algorithm B to the received image processing parameter, adds the information identification ID to the image processing parameter, packetizes the packet, and transfers the packet to the communication I / F unit 105. The internal configuration of the image processing parameter packet at this time is different from the packet for the image processing algorithm A in FIG. 3B, for example, as shown in FIG. 3C (step 7). .

The subsequent parameter registration work in the camera terminal 107 is the same as that in the case of the algorithm A, so that the description thereof will be omitted. After that, the monitoring center 101
Transmits a process start command to the camera terminal 107 in the same procedure as in step 3 described above (step 8). Then, the camera terminal 107 receives / recognizes the processing start command in the same procedure as described above, and the image processing management unit 11
Output to 3. Upon receiving the processing start command, the image processing management unit 113 starts the operation of the image processing unit 110.

Thus, the image processing unit 110 operates the image processing algorithm B supplied in the previous step 6 using the image processing parameters for the image processing algorithm B supplied in the step 7 and causes the image buffer unit 109 to operate the image processing algorithm B. Analysis (image processing) of the mapped image data is performed. At this time, the algorithm B also records the order of each parameter element from the beginning of the parameter area, so even if the data of the empty area is included, only the necessary parameters are extracted and used. can do.

The above is the basic operation, but the parameter can be changed during the operation in the same procedure. That is,
The processing algorithm that is operating in the camera terminal 107 is temporarily stopped, and a parameter packet including a new parameter for the processing algorithm registered in the image processing unit 110 is supplied to the camera terminal 107 and registered. Is supplied to the camera terminal 107,
Image processing with the changed parameters becomes possible.

In the above-described embodiment, the image processing parameter packet is described as a fixed length packet having the fixed length parameter area 23. However, the image processing parameter packet may be of variable length. FIG. 4 shows a format example of the variable-length image processing parameter packet.
Shown in

FIG. 4A is a diagram showing the basic format of a variable-length image processing parameter packet, which includes a start code 21 indicating the start of the packet, that the data content is a parameter, and what kind of algorithm Information identification code 22 indicating the type of data such as whether the parameter is a parameter, a parameter size information recording area 25 indicating the amount of data in a parameter area 26, and a variable length parameter area 26 in which actual data (algorithm parameters) are recorded. , An end code 24 indicating the end of the packet
It is constituted by. Then, the parameter area 26
Has recorded therein a parameter corresponding to the image processing algorithm to be downloaded, and its data amount differs depending on the type of the image processing algorithm.

Assuming that the example of the internal configuration of the image processing parameter packet shown in FIG. 4B is for the image processing algorithm A, the parameter area 26 has 1 byte each.
e, 1 Byte and 2 Byte parameters 1, 2 and 3 are present, and the parameter size information recording area 25 records data indicating that the data amount of the parameter area 26 is 4 Bytes. 4C is a diagram showing an example of the internal configuration of an image processing parameter packet for another image processing algorithm (image processing algorithm B). Similarly, the image for algorithm A in FIG. The processing parameter packet is the information identification code 2
2 and the code contents and data recorded in the parameter size information recording area 25 are different, and the internal configuration and data contents of the parameter area 26 are different.

As described above, when a variable-length packet is used as an image processing parameter packet, a parameter size information recording area 25 is added instead of the empty space in the parameter area. In the camera terminal 107, upon receiving the parameter packet, the data conversion unit 111 extracts the parameter size information from the parameter size information recording area 25 and performs image processing on the data in the parameter area 26 corresponding to the size indicated by the parameter size information. This is output to the management unit 113.

As described above, when variable-length packet data is used, the data amount is increased by the parameter size information recording area 25 as compared with the case where fixed-length packet data is used. Disappears. Therefore, when the parameter amount changes greatly depending on the type of algorithm, the average data amount of the packet should be smaller than when using fixed-length packet data in which the parameter area must be adjusted to the maximum value. Is advantageous.

[0059]

According to the image processing system of the present invention, since the image processing algorithm is downloaded from the terminal control device to the terminal device and executed, the image processing is performed with the optimal algorithm according to the purpose of use and the situation. Thus, there is an effect that image processing with high degree of freedom and high precision can be performed.

Further, the communication packet of the image processing parameter transmitted from the terminal control device to the terminal device is configured such that the same packet ID is used and only the internal format is changed in accordance with the processing algorithm. The communication I / F unit and the data conversion unit of the device and the terminal device can perform the processing uniformly without being conscious of the type of the processing algorithm, and as a result, the software code can be reduced in scale, and the communication specification can be reduced. There is an effect that it is not necessary to be influenced by the algorithm.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an image processing system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a communication flow of an embodiment of the image processing system of the present invention.

FIG. 3 is a diagram showing an example of the internal data configuration of a fixed-length image processing parameter packet used in an embodiment of the image processing system of the present invention.

FIG. 4 is a diagram showing an example of an internal data configuration of a variable-length image processing parameter packet used in an embodiment of the image processing system of the present invention.

FIG. 5 is a block diagram illustrating a configuration example of a conventional image processing system.

FIG. 6 is a diagram showing a communication flow of a conventional image processing system.

[Explanation of symbols]

 101 monitoring center (terminal control device) 102 terminal operation unit (terminal operation unit) 103 terminal management unit (terminal management unit) 104 data conversion unit (second transmission data generation unit) 105 communication I / F unit (second data Communication means 106 communication line 107 camera terminal (terminal device) 108 image input unit (image input unit) 109 image buffer unit (image buffer unit) 110 image processing unit (image processing unit) 111 data conversion unit (first transmission data) Generating means) 112 communication I / F section (first data communication means) 113 image processing management section (image processing management means)

Claims (4)

[Claims] An image input means for converting an image sequentially inputted in time series into digital image information, an image buffer means for accumulating a plurality of the digital image information supplied from the image input means, and an image buffer means Image processing means for comparing the digital image information in the past and the latest digital image information in time series to detect a change in the image, and for transmitting and receiving data via a communication line. An image processing terminal comprising: first transmission data generation means for performing format conversion; and first data communication means for transmitting and receiving format-converted data via a communication line. Terminal operation means for displaying incoming data or inputting control data by an operator, an image processing algorithm of the image processing terminal, Terminal management means for managing an operation state; second transmission data generation means for performing format conversion for transmitting and receiving data via a communication line; and second transmission data generating means for transmitting and receiving format-converted data via a communication line. An image processing system including: a terminal control device including: a data communication unit configured to perform registration management and operation control of an image processing algorithm for performing image processing by the image processing unit; In addition to the image processing management means, the terminal management means of the terminal control device holds a plurality of types of the image processing algorithms, and the terminal control device transmits a desired image processing algorithm to the terminal control device Registering the image processing algorithm received by the image processing means by the image processing management means, and performing image processing. An image processing system, characterized in that. 2. An image which is sequentially input in a time series is converted into digital image information, a plurality of the images are stored, and the past digital image information and the latest digital image information are compared in a time series to change the image. An image processing terminal that performs image processing to detect the image data and outputs the detection data via a communication line, and a terminal control device that displays the detection data transmitted from the image processing terminal and controls the image processing terminal. Wherein the image processing terminal further performs registration management and operation control of an image processing algorithm for performing the image processing, and the terminal control device holds a plurality of types of the image processing algorithms. The terminal control device transmits the desired image processing algorithm to the terminal control device, and the terminal control device receives the received image processing algorithm. Image processing system and performing registration to the image processing of the image processing algorithms. 3. The terminal control apparatus according to claim 2, wherein when transmitting the parameters used in the image processing algorithm, the terminal control apparatus adds the same identification information regardless of the type of the image processing algorithm and transmits the same. The image processing system according to claim 1 or 2. 4. An image input means for converting an image sequentially inputted in time series into digital image information, an image buffer means for accumulating a plurality of digital image information supplied from the image input means, and an image buffer means Image processing means for comparing the digital image information in the past and the latest digital image information in time series to detect a change in the image, and for transmitting and receiving data via a communication line. Transmission data generating means for performing format conversion, data communication means for transmitting and receiving format-converted data via a communication line, and registration management and operation control of an image processing algorithm for performing image processing by the image processing means. Performing image processing management means, and receiving an image processing algorithm transmitted via the communication line, An image processing terminal wherein the image processing algorithm is registered in the image processing means by an image processing management means to perform image processing.