CN110149480A - A kind of video image processing and Transmission system - Google Patents
A kind of video image processing and Transmission system Download PDFInfo
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- CN110149480A CN110149480A CN201910444872.XA CN201910444872A CN110149480A CN 110149480 A CN110149480 A CN 110149480A CN 201910444872 A CN201910444872 A CN 201910444872A CN 110149480 A CN110149480 A CN 110149480A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 53
- 238000012545 processing Methods 0.000 title claims abstract description 48
- 238000003709 image segmentation Methods 0.000 claims abstract description 4
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000012790 confirmation Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003708 edge detection Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64784—Data processing by the network
- H04N21/64792—Controlling the complexity of the content stream, e.g. by dropping packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention discloses a kind of video image processing and Transmission systems, it include camera module, video image processing module and transmission of video images module, camera module and video image processing module communicate to connect, and video image processing module and transmission of video images module communicate to connect；Video image processing module is used to extract the frame image in video, and obtains the target image for containing a large amount of useful information amounts, and video image processing module includes image pre-processing unit and image segmentation unit；Transmission of video images module for realizing video image reliable transmission.The present invention passes through the design of video image processing module, it can be used for extracting the frame image in video, the a large amount of garbages mixed in removal image by external environment, reduce its interference to image, to obtain the target image for containing a large amount of useful information amounts, the quality for improving video is conducive to the identification of important things in video.
Description
Technical field
The invention belongs to image procossing and transmission technique fields, and in particular to a kind of video image processing and Transmission system.
Background technique
Video refer to a series of static images are captured in a manner of electric signal, are noted down, are handled, are stored, transmit with
The various technologies reappeared.Continuous image change it is per second more than more than 24 frames (frame) picture when, according to persistence of vision principle,
Human eye can not distinguish the tableaux of single width, it appears that be smooth continuous visual effect, picture continuous in this way is called video.
But many useless and interference information is usually contained in the video of camera shooting, the quality of video is reduced,
It is unfavorable for the identification of important things in video, such as the face variation or gesture motion of personage.Also, transmission of video is also not enough pacified
It is complete reliable.
Summary of the invention
The purpose of the present invention is to provide a kind of video image processing and Transmission systems, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of video image processing and Transmission system, including
There are camera module, video image processing module and transmission of video images module, the camera module and video image processing
Module communication connection, the video image processing module and transmission of video images module communicate to connect；
The camera module is for capturing video data；
The video image processing module is used to extract the frame image in video, and obtains containing a large amount of useful information amounts
Target image, the video image processing module includes image pre-processing unit and image segmentation unit；
Reliable transmission of the transmission of video images module for realizing video image, the transmission of video images module packet
Buffer location, frame structure unit, flow controlling unit, confirmation technical unit and timeout treatment unit are included.
Preferably, described image pretreatment unit is used to carry out frame image denoising acoustic jamming processing；
Described image pretreatment unit includes median filter unit and background separation unit.
Preferably, the median filter unit is for removing a large amount of useless letters mixed in frame image by external environment
Breath, reduces its interference to frame image, facilitates subsequent image procossing.
Preferably, the background separation unit is carried out by the present frame in image sequence and the background frames image chosen
Calculating is made the difference, can be detected out the motion profile of target object in complicated background image.
Preferably, described image cutting unit efficiently extracts out pixel in digital picture by the way of edge detection
The pixel that point mutates, these variations generally comprise the most important information in whole image, pass through interception image
Main contact position information, the situation of change of its relative position is calculated according to the geometric center of contact edges.
Preferably, the buffer location is broken down into several data frames simultaneously for disposably receiving JPG image data
For the sequence being incremented by according to serial number from 1 number consecutively, receiving end receives after a complete width JPG image data property write-in figure again
In picture file, to improve read-write data.
Preferably, the frame structure unit adds frame head structure to every frame, and frame head structure defines sequence number, video compress
Format and time stamp；
Sequence number is the sequence notation that data packet is sent, and whether has loss of data in detection transmission, and come used in receiving end
Rearrangement；
Video compression format label uses corresponding decoding process for receiving end；
The time of timestamp control video playback.
Preferably, the flow controlling unit guarantees that network flow will not increase suddenly, allows some leeway for other connections.
Preferably, the confirmation technical unit maximally utilises Internet resources, can for preferably controlling flow
Guarantee data reliable delivery in data-transfer protocols.
Preferably, the timeout treatment unit retransmits data when receiving failure, directly for guaranteeing data reliability
Until sending successfully.
The utility model has the advantages that
(1) of the invention a kind of video image processing and Transmission system can be used by the design of video image processing module
In extracting the frame image in video, a large amount of garbages mixed in image by external environment are removed, reduce it to image
Interference improves the quality of video, is conducive to important thing in video to obtain the target image for containing a large amount of useful information amounts
The identification of object.
(2) of the invention a kind of video image processing and Transmission system, pass through the design of transmission of video images module, realize
The safe and reliable transmission of video image, and rationally control network flow.
Detailed description of the invention
Fig. 1 is present system structural block diagram.
Specific embodiment
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
As shown in Figure 1, a kind of video image processing and Transmission system, it is characterised in that:
Include camera module, video image processing module and transmission of video images module, the camera module with
The communication connection of video image processing module, the video image processing module and transmission of video images module communicate to connect；
The camera module is for capturing video data；
The video image processing module is used to extract the frame image in video, and obtains containing a large amount of useful information amounts
Target image, the video image processing module includes image pre-processing unit and image segmentation unit；
Reliable transmission of the transmission of video images module for realizing video image, the transmission of video images module packet
Buffer location, frame structure unit, flow controlling unit, confirmation technical unit and timeout treatment unit are included.
The driving method of camera module, since the flexibility of DirectShow driving camera is preferable, which is used
DirectShow drives camera.
Described image pretreatment unit is used to carry out frame image denoising acoustic jamming processing；
Described image pretreatment unit includes median filter unit and background separation unit.
The median filter unit reduces it for removing a large amount of garbages mixed in frame image by external environment
Interference to frame image facilitates subsequent image procossing.
The background separation unit carries out making the difference meter by the present frame in image sequence and the background frames image chosen
It calculates, can be detected out the motion profile of target object in complicated background image；
Background subtraction basic thought is done by the present frame in image sequence and the background frames image chosen
Difference calculates, and obtained frame difference is exactly moving target object, can be detected out the fortune of target object in complicated background image
Dynamic rail mark.The key technology of background difference is the modeling quality of background, and the precision of background model knows entire algorithm
Effect.The method for the background modeling taken according to systematic difference environment difference is also different, mainly there is median method, averaging method, card
Thalmann filter model, single Gaussian distribution model, more Gaussian distribution models and advanced background model.
Described image cutting unit is efficiently extracted out pixel in digital picture and is occurred to dash forward by the way of edge detection
The pixel of change, these variations generally comprise the most important information in whole image, pass through the main contact of interception image
Location information calculates the situation of change of its relative position according to the geometric center of contact edges.
The buffer location is broken down into several data frames and according to sequence for disposably receiving JPG image data
From 1 number consecutively, receiving end receives after a complete width JPG image data property write-in image file again for number incremental sequence
In, to improve read-write data；
Due to the limitation of wireless transmission bandwidth and software and hardware resources of microcontroller, compressed JPG image (320 × 240) is still
It must so be recombinated when transmitting terminal is divided into several frames, reaches receiving terminal.Since transmitting terminal is there are the possibility of retransmission data frame, connect
Receiving end is possible to receive out-of-order data frame, therefore transmitting terminal and receiving end determine a transmission of video buffer area, size 65536
(can be according to the image size appropriate adjustment to be transmitted) byte.Transmitting terminal first delays a width jpg image data one-time write
Area is rushed, is broken down into several data frames, the sequence that each frame is incremented by according to serial number is from 1 number consecutively, so that the size of each frame
No more than 2048 bytes, referred to as a data frame.Receiving end receives after a complete width JPG image data property write-in figure again
As in file.Frame sign should be dynamically determined according to specific network, to reach optimal laser propagation effect.Experiments have shown that this
Positioned every time than not opening buffer area merely with file pointer it is much better to read and write effect data, the reason is that reading and writing data from memory
It is more faster than reading and writing data from hard disk.
The frame structure unit to every frame add frame head structure, frame head structure define sequence number, video compression format and
Time stamp；
Sequence number is the sequence notation that data packet is sent, and whether has loss of data in detection transmission, and come used in receiving end
Rearrangement；
Video compression format label uses corresponding decoding process for receiving end；
The time of timestamp control video playback.
The flow controlling unit guarantees that network flow will not increase suddenly, allows some leeway for other connections；
Use for reference Transmission Control Protocol flow control mechanism: slow turn-on and linear increase reduce process at double.After a connection setup slow
In start-up course, sender's window is first set to minimum value, after successfully having transmitted the data in window, is just exponentially increased
Window, until some threshold value.This guarantees network flows to increase suddenly, allows some leeway for other connections.When transmission window
After mouth reaches threshold value, window will only be linearly increased by being often successfully transmitted a data.And in case of packet loss, the threshold value of window
Half can be reduced, and the slow turn-on process by minimum value again.
The confirmation technical unit maximally utilises Internet resources, in authentic data for preferably controlling flow
Guarantee data reliable delivery in delivery protocol；
Guarantee being sought to substantially using confirmation technology for data reliable delivery in authentic data delivery protocol.In order to more preferable
Ground controls flow, achievees the purpose that maximally utilise Internet resources, and piggybacking, accumulative confirmation and time-out confirmation can be used
And extension confirms that these types of mode confirms in conjunction with to realize.Wherein preceding 3 kinds of validation testings are consistent with the usage in TCP, connecing
It is not simply to be abandoned, but store it in reduce re-transmission to the maximum extent when debit receives out-of-sequence data packet
In local out-of-sequence buffering queue, and out-of-sequence package counting facility is set, recipient is more than threshold value or confirmation timer in counter
Send extension confirmation data packet to sender after time-out, carry in the data packet maximum sequentially packet serial number that local terminal has received and
The serial number information of all out-of-sequence packets received will be according to most after transmitting terminal receives the extension confirmation data packet transmitted by receiving end
The serial number for the out-of-sequence packet that big acknowledged sequence number and opposite end receive calculates the data packet serial number that retransmit, and takes from retransmission queue
Corresponding data packet carries out Fast retransmission out.For example, transmitting terminal has sent the 1st, 2,3,4,5,6,7 frame, receiving end is only had received
1,2,5,7 frames.At this point, receiving end is not simply to abandon 5,7 frames, but 5,7 frames are placed on rx-side buffering area, send out simultaneously
An acknowledgement frame is sent, wherein the domain Data includes all out-of-sequence serial numbers of data frame of the present image that has received of receiving end.
The timeout treatment unit retransmits data when receiving failure for guaranteeing data reliability, until sending
Until success；
One of processing time-out and the method retransmitted are exactly to send the waiting n second after a request, if not receiving response,
It retransmits and waits again N seconds other.This is a kind of timer linearly retransmitted, and just abandons retransmitting after retransmitting certain number.
Of the invention a kind of video image processing and Transmission system can be used for by the design of video image processing module
The frame image in video is extracted, a large amount of garbages mixed in image by external environment is removed, reduces it and image is done
It disturbs, to obtain the target image for containing a large amount of useful information amounts, improves the quality of video, be conducive to important things in video
Identification.
Of the invention a kind of video image processing and Transmission system are realized by the design of transmission of video images module
The safe and reliable transmission of video image, and rationally control network flow.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on above description specific embodiment.To those skilled in the art, the equivalent modifications and replace that any couple of present invention carries out
In generation, is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and repair
Change, all covers within the scope of the present invention.
Claims (10)
1. a kind of video image processing and Transmission system, it is characterised in that:
It include camera module, video image processing module and transmission of video images module, the camera module and video
Image processing module communication connection, the video image processing module and transmission of video images module communicate to connect；
The camera module is for capturing video data；
The video image processing module is used to extract the frame image in video, and obtains the target for containing a large amount of useful information amounts
Image, the video image processing module includes image pre-processing unit and image segmentation unit；
For realizing the reliable transmission of video image, the transmission of video images module includes the transmission of video images module
Buffer location, frame structure unit, flow controlling unit, confirmation technical unit and timeout treatment unit.
2. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
Described image pretreatment unit is used to carry out frame image denoising acoustic jamming processing；
Described image pretreatment unit includes median filter unit and background separation unit.
3. a kind of video image processing according to claim 2 and Transmission system, it is characterised in that:
The median filter unit reduces it to frame for removing a large amount of garbages mixed in frame image by external environment
The interference of image facilitates subsequent image procossing.
4. a kind of video image processing according to claim 2 and Transmission system, it is characterised in that:
The background separation unit carries out making the difference calculating by the present frame in image sequence and the background frames image chosen,
It can be detected out the motion profile of target object in complicated background image.
5. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
Described image cutting unit efficiently extracts out what pixel in digital picture mutated by the way of edge detection
Pixel, these variations generally comprise the most important information in whole image, pass through the main contact position of interception image
Information calculates the situation of change of its relative position according to the geometric center of contact edges.
6. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
The buffer location is broken down into several data frames and passs according to serial number for disposably receiving JPG image data
From 1 number consecutively, receiving end receives after complete width JPG image data in property write-in image file again the sequence of increasing,
To improve read-write data.
7. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
The frame structure unit adds frame head structure to every frame, and frame head structure defines sequence number, video compression format and time stamp；
Sequence number is the sequence notation that data packet is sent, and whether has loss of data in detection transmission, and is used in receiving end and comes again
Sequence；
Video compression format label uses corresponding decoding process for receiving end；
The time of timestamp control video playback.
8. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
The flow controlling unit guarantees that network flow will not increase suddenly, allows some leeway for other connections.
9. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
The confirmation technical unit maximally utilises Internet resources, transmits in authentic data for preferably controlling flow
Guarantee data reliable delivery in agreement.
10. a kind of video image processing according to claim 1 and Transmission system, it is characterised in that:
The timeout treatment unit retransmits data when receiving failure, until sending successfully for guaranteeing data reliability
Until.
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| CN201910444872.XA CN110149480A (en) | 2019-05-27 | 2019-05-27 | A kind of video image processing and Transmission system |
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