CN116962645A - Video data transmission method for electric power - Google Patents

Video data transmission method for electric power Download PDF

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Publication number
CN116962645A
CN116962645A CN202310972535.4A CN202310972535A CN116962645A CN 116962645 A CN116962645 A CN 116962645A CN 202310972535 A CN202310972535 A CN 202310972535A CN 116962645 A CN116962645 A CN 116962645A
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China
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data
area
image
dynamic
region
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Inventor
周长鹏
王智东
陈志峰
冯瑞珏
胡泽森
胡杨
李家豪
杨树丰
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Guangzhou City University of Technology
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Guangzhou City University of Technology
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Priority to CN202310972535.4A priority Critical patent/CN116962645A/en
Publication of CN116962645A publication Critical patent/CN116962645A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10016—Video; Image sequence

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention provides a method for transmitting video data for electric power, which divides a shot image into a dynamic area and a static area, wherein the dynamic area is used for displaying numerical data of a transformer substation; the static area is used for displaying external environment data of the transformer substation; because the image of the static area is unchanged and the image of the dynamic area is changed greatly, synthesizing the data of the static area of the first frame with the data of the dynamic area of different frames into each frame of image; the transmission of static images is reduced, and the pressure of data transmission is reduced.

Description

Video data transmission method for electric power
Technical Field
The invention relates to the technical field of monitoring, in particular to a video data conveying method.
Background
With the increasing demand for power supply, substations have become visible everywhere. The transformer substation plays an important role in a power grid as a power place for power system transfer, and in order to improve the safety of the transformer substation and enable the power to be stably output, the transformer substation needs to be monitored and maintained regularly. In the prior art, a transformer substation and the external environment thereof are monitored through a camera.
In China application number 201410587372.9 and publication date 2015.2.4, the patent literature discloses an intelligent identification monitoring system and method for an unmanned substation; the monitoring system is based on an all IP video monitoring system (IPVS), comprising: the front-end video acquisition layer monitors the video of the transformer substation in real time by adopting a network camera with an intelligent recognition function, and transmits monitoring data to a monitoring center through a network transmission layer; the video storage layer comprises on-site scattered storage of transformer substation information and centralized storage of a monitoring center; the surrounding warning layer is used for collecting environment information in real time through an infrared/microwave sensor, a vibration detection device and temperature and humidity collecting equipment, the monitoring center is used for receiving abnormal information sent by the front-end video collecting layer, further judging the information, screening out local alarms caused by normal operation, and remotely alarming if abnormality exists.
When abnormal real-time images occur, the monitoring system needs to transmit each shot video image to the background; the background analyzes the transformer substation through video information; in the transformer substation scene, the scene change of the transformer substation is less, most of the image areas are stationary for a long time, and each frame of video image is transmitted, so that data redundancy is caused, and resources are wasted.
Disclosure of Invention
The invention provides a method for transmitting video data for electric power, which reduces the transmission of static images and reduces the pressure of data transmission.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the method for transmitting the video data for the electric power is realized by a processing system, wherein the processing system comprises shooting equipment, a first processor and a client, and the shooting equipment, the first processor and the client are in signal connection.
The method for transmitting the video data for the electric power comprises the following steps:
s1, presetting a dynamic region and a static region of a shooting target, wherein the region where a transformer substation is located is a dynamic region, and the external environment of the transformer substation is a static region; presetting an alarm signal of a dynamic area; a first interval time limit J is preset.
S2, the front-end equipment shoots a shooting target in real time and transmits shot video data to the first processor in real time.
S3, dividing the dynamic region and the static region of the current frame image, and storing the data of the dynamic region of the current frame image; and only transmitting the data of the static area of the first frame image to the client, wherein the static area of the first frame image is the static area in the first frame image shot by the front-end equipment.
S4, the first processor acquires data of a dynamic region of the current frame image, judges whether the data of the dynamic region of the current frame image contains an alarm signal or not, and if not, carries out S5; if yes, go to S6.
S5, repeatedly performing first interval time limit J timing by the first processor, and after finishing the first interval time limit J timing, sending data of a dynamic area of an image of each frame in the first interval time limit J to the client; after the calculation of the first interval time limit J is finished, the client combines the data of the static area of the first frame image with the data of the dynamic areas of the other frame images to form each frame image, and then the process goes to S7.
S6, the first processor sends the data of the dynamic region of the current frame image to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form the image of the current frame, and then proceeds to S7.
S7, the client synthesizes the images of the different frames into video for display.
The method comprises the steps that a shot image is divided into a dynamic area and a static area, and the dynamic area is used for displaying numerical data of a transformer substation; the static area is used for displaying external environment data of the transformer substation; because the image of the static area is unchanged and the image of the dynamic area is changed greatly, synthesizing the data of the static area of the first frame with the data of the dynamic area of different frames into each frame of image; the transmission of static images is reduced, and the pressure of data transmission is reduced.
By setting the alarm signal, when the data of the dynamic area does not contain the alarm signal, the data interval of the dynamic area is sent to the client, so that the first processor and the client are not linked within the first interval time limit, unnecessary image transmission is reduced, and the operation load of equipment is lightened; and the dynamic region data of each frame of image between adjacent interval time limits are transmitted at intervals, so that the data of each frame of image can be transmitted to a client, and the integrity of the image data is ensured.
When the data of the dynamic area contains an alarm signal, the data of the dynamic area is immediately sent to the client, so that the current transformer substation condition can be displayed in the client in real time.
Further, S3 specifically includes the following steps:
and S3.1, saving the data of the dynamic area and the data of the static area of the image of the first frame, and sending the data of the dynamic area and the data of the static area of the image of the first frame to the client.
And S3.2, the first processor divides the dynamic area and the static area of the images of the rest frames of the video data, and saves the data of the dynamic areas of the images of the rest frames.
The method comprises the steps of firstly, sending data of a dynamic area and data of a static area of an image of a first frame to a client; then the dynamic areas of the images of the rest frames are sent to the client; the client is convenient to merge images of different frames; meanwhile, only the data of the static area of the first frame image is stored, so that the utilization rate of the storage space is improved.
Further, a dynamic region and a static region of a shooting target are preset, and the method specifically comprises the following steps:
a1, presetting a growth threshold value and a threshold value of a Hamming distance; images of different time points of the shooting target are acquired.
A2, determining a pixel point as a first growth point in the image at the first time point; and growing the first growing point serving as a center to adjacent pixels to generate a first area.
A3, growing to adjacent pixels by taking a pixel point at the edge of the first area as a center, and expanding the first area.
A4, repeating the step A3 to complete the growth of the first region.
A5, dividing a first area and an area except the first area in the image;
a6, performing scaling processing and graying processing on the image of the first area and the area outside the first area.
A7, calculating a dHash value of the first area; and calculating dHash values of areas except the first area of the current frame.
A8, repeating the steps A1-A7, and calculating a dHash value of the first area in the image at the second time point; calculating dHash values of areas except the first area;
a9, calculating a difference value between dHash values of the first areas of the two time points, and calculating a difference value between dHash values of areas outside the first areas of the two time points;
a10, setting a region with a difference value larger than a threshold value of Yu Hanming distance as a dynamic region; the region of the threshold value where the difference is smaller than the Yu Hanming distance is set as the static region.
The method uses the region growing method to cut the image, so that the segmentation effect of the first region and the non-first region is good; reducing the data amount of the image through scaling and graying; meanwhile, judging whether the image is changed or not by calculating the magnitude between the difference value and the threshold value of the Hamming distance; thereby identifying the still region and the dynamic region by whether the image changes or not so as to achieve separate transmission.
Further, after S5 and S6, S7 is also included; and S7, the client synthesizes the images of different frames into video display. And monitoring the transformer substation by the client through synthesizing the video.
Further, in S1, the alarm signal is a change threshold K of the substation display value.
Further, S4 is specifically: the method comprises the steps that a first processor obtains a substation display value of a dynamic region of a current frame image; if the difference value between the substation display value of the current frame and the substation display value of the previous frame of image is smaller than the change threshold K, S5 is carried out; and if the difference value between the current substation display value and the substation display value of the previous frame of image is larger than the change threshold K, performing S6.
By the method, whether the display value of the transformer substation is normal or not is monitored.
Further, in S1, the substation display value of the alarm signal for the dynamic area is blocked.
Further, S4 is specifically: the method comprises the steps that a first processor obtains a substation display value of a dynamic region of a current frame image; if the display value of the current frame transformer substation is normally displayed, S5 is carried out; and if the current substation display numerical value is blocked, S6 is performed.
According to the method, whether the display numerical value of the transformer substation is shielded or not is monitored.
Further, S5 further includes: in the first interval time limit J timing, entering into step S51, acquiring data of a dynamic region of the current frame image by a first processor, judging whether the data of the dynamic region of the current frame image contains an alarm signal or not, and if not, executing step S52; if yes, go to S53;
s52, if the first interval time limit J is reached, sending data of a dynamic region of an image of each frame in the first interval time limit J to a client; after the timing of the first interval time limit J is finished, the client combines the data of the static area of the first frame image with the data of the dynamic areas of other frame images to form each frame image; then enter S7;
s53, the first processor sends the current frame image and the data of the dynamic areas of the images of different frames between the frame images which are sent last time from the current frame to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form an image of the current frame, and combines the data of the dynamic area of the image of the current frame image and the image of the different frame between the last transmitted frame image and the image of the current frame image with the data of the static area of the first frame image to form images of other frames; and then proceeds to S7.
By the arrangement, in the timing of the first interval time limit J, if the dynamic area data of the current frame image is abnormal, the data can be sent in time to form each frame image, so that the dynamic area data can be displayed in time, and when no abnormality exists, the data can be sent after the completion of the first interval time limit J, so that the data transmission quantity is reduced, and meanwhile, the data transmission reliability is ensured.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Embodiment one.
As shown in fig. 1, a method for transmitting video data for electric power is implemented by a processing system, wherein the processing system comprises a shooting device, a first processor and a client, and the shooting device, the first processor and the client are in signal connection.
The method for transmitting the video data for the electric power comprises the following steps:
s1, presetting a dynamic region and a static region of a shooting target, wherein the region where a transformer substation is located is a dynamic region, and the external environment of the transformer substation is a static region; presetting an alarm signal of a dynamic area; a first interval time limit J is preset. In this embodiment, the alarm signal is a change threshold K of the substation display value.
S2, the front-end equipment shoots a shooting target in real time and transmits shot video data to the first processor in real time.
S3, dividing the dynamic region and the static region of the current frame image, and storing the data of the dynamic region of the current frame image; and transmitting the data of the dynamic region and the data of the static region of the first frame image to the client.
S4, the first processor acquires a substation display value of a dynamic region of the current frame image; if the difference value between the substation display value of the current frame and the substation display value of the previous frame of image is smaller than the change threshold K, S5 is carried out; and if the difference value between the current substation display value and the substation display value of the previous frame of image is larger than the change threshold K, performing S6. And thus, whether the display value of the transformer substation is normal or not is monitored.
S5, repeatedly performing first interval time limit J timing by the first processor, and after finishing the first interval time limit J timing, sending data of a dynamic area of an image of each frame in the first interval time limit J to the client; after the calculation of the first interval time limit J is finished, the client uses the data of the static area of the first frame image and the data of the dynamic areas of other frame images to combine to form each frame image. Then S7 is performed.
S5, further comprising: in the first interval time limit J timing, entering into step S51, acquiring data of a dynamic region of the current frame image by a first processor, judging whether the data of the dynamic region of the current frame image contains an alarm signal or not, and if not, executing step S52; if yes, go to S53;
s52, if the first interval time limit J is reached, sending data of a dynamic region of an image of each frame in the first interval time limit J to a client; after the timing of the first interval time limit J is finished, the client combines the data of the static area of the first frame image with the data of the dynamic areas of other frame images to form each frame image; then enter S7;
s53, the first processor sends the current frame image and the data of the dynamic areas of the images of different frames between the frame images which are sent last time from the current frame to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form an image of the current frame, and combines the data of the dynamic area of the image of the current frame image and the image of the different frame between the last transmitted frame image and the image of the current frame image with the data of the static area of the first frame image to form images of other frames; then enter S7;
s6, the first processor sends the data of the dynamic region of the current frame image to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form the image of the current frame. Then S7 is performed.
S7, the client synthesizes the images of the different frames into video for display.
In this embodiment, the front-end device may collect an image in a preset collection time, for example, 1s, and form a frame of image at each interval by a preset collection time, where a frame of image includes image static area data and image dynamic area data. And then, the first interval time J is the interval time of the first processor and the client for transmitting data, for example, 10S is preset, if the image dynamic area data is found to be abnormal in the 2 nd frame image, the data transmission is carried out in the step S6, then the data is not transmitted firstly until no abnormality is found in the first interval time J when the dynamic area data is found to be abnormal in the next frame image, if the abnormality is found in the 4 th frame image and the time is not yet reached to 10S, the dynamic data of the 3 rd frame and the 4 th frame image between the 2 nd frame and the 4 th frame which are transmitted most recently from the 4 th frame are transmitted to the client for display.
The method comprises the steps that a shot image is divided into a dynamic area and a static area, and the dynamic area is used for displaying numerical data of a transformer substation; the static area is used for displaying external environment data of the transformer substation; because the image of the static area is unchanged and the image of the dynamic area is changed greatly, synthesizing the data of the static area of the first frame with the data of the dynamic area of different frames into each frame of image; the transmission of static images is reduced, and the pressure of data transmission is reduced.
By setting the alarm signal, when the data of the dynamic area does not contain the alarm signal, the data interval of the dynamic area is sent to the client, so that the first processor and the client are not linked within the first interval time limit, unnecessary image transmission is reduced, and the operation load of equipment is lightened; and the dynamic region data of each frame of image between adjacent interval time limits are transmitted at intervals, so that the data of each frame of image can be transmitted to a client, and the integrity of the image data is ensured.
When the data of the dynamic area contains an alarm signal, the data of the dynamic area is immediately sent to the client, so that the current transformer substation condition can be displayed in the client in real time. And monitoring the transformer substation by the client through synthesizing the video.
The step S3 specifically comprises the following steps:
and S3.1, saving the data of the dynamic area and the data of the static area of the image of the first frame, and sending the data of the dynamic area and the data of the static area of the image of the first frame to the client.
And S3.2, the first processor divides the dynamic area and the static area of the images of the rest frames of the video data, and saves the data of the dynamic areas of the images of the rest frames.
The method comprises the steps of firstly, sending data of a dynamic area and data of a static area of an image of a first frame to a client; then the dynamic areas of the images of the rest frames are sent to the client; the client is convenient to merge images of different frames; meanwhile, only the data of the static area of the first frame image is stored, so that the utilization rate of the storage space is improved.
In S1, a dynamic area and a static area of a shooting target are preset, which specifically includes the following steps:
a1, presetting a growth threshold value and a threshold value of a Hamming distance; images of different time points of the shooting target are acquired.
A2, determining a pixel point as a first growth point in the image at the first time point; and growing the first growing point serving as a center to adjacent pixels to generate a first area.
A3, growing to adjacent pixels by taking a pixel point at the edge of the first area as a center, and expanding the first area.
A4, repeating the step A3 to complete the growth of the first region.
A5, dividing a first area and an area except the first area in the image;
a6, performing scaling processing and graying processing on the image of the first area and the area outside the first area.
A7, calculating a dHash value of the first area; and calculating dHash values of areas except the first area of the current frame.
A8, repeating the steps A1-A7, and calculating a dHash value of the first area in the image at the second time point; calculating dHash values of areas except the first area;
a9, calculating a difference value between dHash values of the first areas of the two time points, and calculating a difference value between dHash values of areas outside the first areas of the two time points;
a10, setting a region with a difference value larger than a threshold value of Yu Hanming distance as a dynamic region; the region of the threshold value where the difference is smaller than the Yu Hanming distance is set as the static region.
The method uses the region growing method to cut the image, so that the segmentation effect of the first region and the non-first region is good; reducing the data amount of the image through scaling and graying; meanwhile, judging whether the image is changed or not by calculating the magnitude between the difference value and the threshold value of the Hamming distance; thereby identifying the still region and the dynamic region by whether the image changes or not so as to achieve separate transmission. In this embodiment, the dHash value of the image is calculated, and the hamming distance is calculated by the dHash values of the two images, which are not described in detail herein.
Embodiment two.
In this embodiment, in S1, the substation display value of the alarm signal for the dynamic area is blocked.
S4 specifically comprises the following steps: the method comprises the steps that a first processor obtains a substation display value of a dynamic region of a current frame image; if the display value of the current frame transformer substation is normally displayed, S5 is carried out; and if the current substation display numerical value is blocked, S6 is performed. Thus, whether the display value of the transformer substation is shielded or not is monitored.

Claims (9)

1. A method for transmitting video data for electric power is characterized in that: the processing system is realized by a processing system, and comprises shooting equipment, a first processor and a client, wherein the shooting equipment, the first processor and the client are in signal connection;
the method for transmitting the video data for the electric power comprises the following steps:
s1, presetting a dynamic region and a static region of a shooting target, wherein the region where a transformer substation is located is a dynamic region, and the external environment of the transformer substation is a static region; presetting an alarm signal of a dynamic area; presetting a first interval time limit J;
s2, the front-end equipment shoots a shooting target in real time and transmits shot video data to the first processor in real time;
s3, dividing the dynamic region and the static region of the current frame image, and storing the data of the dynamic region of the current frame image; transmitting the data of the dynamic region and the data of the static region of the first frame image to a client;
s4, the first processor acquires data of a dynamic region of the current frame image, judges whether the data of the dynamic region of the current frame image contains an alarm signal or not, and if not, carries out S5; if yes, S6 is carried out;
s5, repeatedly performing first interval time limit J timing by the first processor, and after finishing the first interval time limit J timing, sending data of a dynamic area of an image of each frame in the first interval time limit J to the client; after the calculation of the first interval time limit J is finished, the client combines the data of the static area of the first frame image with the data of the dynamic areas of other frame images to form each frame image; then enter S7;
s6, the first processor sends the data of the dynamic region of the current frame image to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form the image of the current frame, and then enters S7;
s7, the client synthesizes the images of the different frames into video for display.
2. The method for transmitting video data for electric power according to claim 1, wherein: s3 specifically comprises the following steps:
s3.1, storing the data of the dynamic region and the data of the static region of the image of the first frame, and sending the data of the dynamic region and the data of the static region of the image of the first frame to a client;
and S3.2, the first processor divides the dynamic area and the static area of the images of the rest frames of the video data, and saves the data of the dynamic areas of the images of the rest frames.
3. The method for transmitting video data for electric power according to claim 1, wherein: the method comprises the following steps of:
a1, presetting a growth threshold value and a threshold value of a Hamming distance; acquiring images of different time points of a shooting target;
a2, determining a pixel point as a first growth point in the image at the first time point; growing adjacent pixels by taking the first growing point as a center to generate a first area;
a3, growing adjacent pixels by taking a pixel point at the edge of the first area as a center, and expanding the first area;
a4, repeating the step A3 to complete the growth of the first region;
a5, dividing a first area and an area except the first area in the image;
a6, performing scaling processing and graying processing on the first area and the image of the area outside the first area;
a7, calculating a dHash value of the first area; calculating dHash values of areas except the first area of the current frame;
a8, repeating the steps A1-A7, and calculating a dHash value of the first area in the image at the second time point; calculating dHash values of areas except the first area;
a9, calculating a difference value between dHash values of the first areas of the two time points, and calculating a difference value between dHash values of areas outside the first areas of the two time points;
a10, setting a region with a difference value larger than a threshold value of Yu Hanming distance as a dynamic region; the region of the threshold value where the difference is smaller than the Yu Hanming distance is set as the static region.
4. The method for transmitting video data for electric power according to claim 1, wherein: after S5 and S6, S7 is also included; and S7, the client synthesizes the images of different frames into video display.
5. The method for transmitting video data for electric power according to claim 1, wherein: in S1, an alarm signal is a change threshold K of a display numerical value of a transformer substation.
6. The method for transmitting video data for electric power according to claim 5, wherein: s4 specifically comprises the following steps: the method comprises the steps that a first processor obtains a substation display value of a dynamic region of a current frame image; if the difference value between the substation display value of the current frame and the substation display value of the previous frame of image is smaller than the change threshold K, S5 is carried out; and if the difference value between the current substation display value and the substation display value of the previous frame of image is larger than the change threshold K, performing S6.
7. The method for transmitting video data for electric power according to claim 1, wherein: in S1, the display value of the transformer substation with the alarm signal being a dynamic area is shielded.
8. The method for transmitting video data for electric power according to claim 4, wherein: s4 specifically comprises the following steps: the method comprises the steps that a first processor obtains a substation display value of a dynamic region of a current frame image; if the display value of the current frame transformer substation is normally displayed, S5 is carried out; and if the current substation display numerical value is blocked, S6 is performed.
9. The method for transmitting video data for electric power according to claim 1, wherein: s5, further comprising: in the first interval time limit J timing, entering into step S51, acquiring data of a dynamic region of the current frame image by a first processor, judging whether the data of the dynamic region of the current frame image contains an alarm signal or not, and if not, executing step S52; if yes, go to S53;
s52, if the first interval time limit J is reached, sending data of a dynamic region of an image of each frame in the first interval time limit J to a client; after the timing of the first interval time limit J is finished, the client combines the data of the static area of the first frame image with the data of the dynamic areas of other frame images to form each frame image; then enter S7;
s53, the first processor sends the current frame image and the data of the dynamic areas of the images of different frames between the frame images which are sent last time from the current frame to the client; the client combines the data of the static area of the first frame image with the data of the dynamic area of the current frame image to form an image of the current frame, and combines the data of the dynamic area of the image of the current frame image and the image of the different frame between the last transmitted frame image and the image of the current frame image with the data of the static area of the first frame image to form images of other frames; and then proceeds to S7.
CN202310972535.4A 2023-08-03 2023-08-03 Video data transmission method for electric power Pending CN116962645A (en)

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Application Number Priority Date Filing Date Title
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