CN105208336A - High-power zoom unmanned aerial vehicle aerial high-definition multi-dimension real-time investigation transmitting method - Google Patents
High-power zoom unmanned aerial vehicle aerial high-definition multi-dimension real-time investigation transmitting method Download PDFInfo
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Abstract
The invention discloses a high-power zoom unmanned aerial vehicle aerial high-definition multi-dimension real-time investigation transmitting method. The method comprises the following steps that firstly, a monitoring computer starts a monitoring program, and a satellite navigation unit starts a GPS navigation program; secondly, a high-definition high-power zoom action camera collects video images according to the track of the monitoring program, and a vehicle-side image processing module processes the images; thirdly, a video image wireless transmitting module and a video image receiving module cooperate to complete wireless sending and receiving of image signals; fourthly, a central station image processing module processes the received image signals, and the received image signals are displayed on a terminal. According to the method, visual navigation, image recognition and obstacle avoidance are supported, parameters can be properly changed under the situation that the influence of transmission delay is avoided, and thus the image recognition rate is increased; a satellite communication network mode and a traditional communication mode are fused together, high-capacity image data can be exchanged at a high speed, and high safety is achieved.
Description
Art
The present invention relates to unmanned plane investigation field, be specifically related to the aerial high definition multidimensional of a kind of high power zoom unmanned plane and investigate transmission method in real time.
Background technology
Unmanned vehicle, especially four-axle aircraft obtain suitable development and application, the investigation and take photo by plane exactly in unmanned vehicle extensive use field along with the development of science and technology.This taking photo by plane is investigated in a professional environment, and under professional environment, the time of finding a view is long, photographing request is high, operator's specialty, and what adopt so general is all repeated multiple times shooting, then later stage editing splicing, obtains the investigation style of shooting that the best that user can enjoy presents effect.Also therefore, in a professional environment, the those skilled in the art that are promoted to of shooting effect paid close attention to, such as: stabilization, stable etc.
The passback of existing investigation video image, great majority are based on analog video signal, not fogging clear, also need the equipment being called IOSD, the analog video signal of high-definition camera and flight parameter in fact just carry out superposing and return ground by this equipment, although what therefore aircraft stores is high-definition image, the image passing back to ground is the analog image having superposed flight status parameter, and people often need the high-definition digital image seeing aircraft photographs in real time.
UAS includes unmanned plane body platform, mission payload and data wireless and transmits three parts.The key that UAV Video data transmission applications realizes is wireless transmission link means.Current Radio Transmission Technology mainly contains and comprises following technology: 3G network (CDMA2000, WCDMA, TD-SCDMA), 4G (TD-LTE and FDD-LTE) network, WLAN (wireless local area network) (WIFI), satellite, microwave etc.
Satellite and microwave technology are the traditional means of wireless video transmission, and the great advantage of communication technology of satellite to be service range wide, powerful, use flexibly, by the impact of geographical environment and other external environment condition, especially not by the impact of external electromagnetic environment.But these two kinds of technical costss remain high, and the initial expenditure of construction of its costliness and communication fee often make people hang back, cannot spread.
The technique construction wireless MANs such as WIMAX/WIFI carry out the Video Applications covered on a large scale, need Construction Party to build a large amount of base station, and base station construction cost is huge on the one hand, and non-general user can bear; Even if on the other hand a certain unit has built up wireless MAN, because its initial construction cost is huge and be reluctant to share with other users, thus larger waste is caused to social resources.
Summary of the invention
The invention provides the aerial high definition multidimensional of a kind of high power zoom unmanned plane and investigate transmission method in real time, the method is supported vision guided navigation, image recognition and is kept away barrier, suitably parameter can be changed when not affecting by propagation delay, improve image recognition rate thus, satellite communication network pattern and conventional communication mode are merged, the high speed that can solve large capacity image data exchanges, and has higher fail safe.
To achieve these goals, the invention provides the aerial high definition multidimensional of a kind of high power zoom unmanned plane and investigate transmission method in real time.The method specifically comprises the steps:
S1. supervisory control comuter starts monitoring program, and described satellite navigation unit starts GPS navigation program;
S2. high definition high power zoom motion video camera gathers video image according to the track of monitoring program, and machine end image processing module processes image;
S3. video image wireless transmitter module, and video image receiver module, has coordinated wireless transmission and the reception of picture signal;
S4. central site image processing module processes the picture signal received, and shows on display terminal.
Preferably, in step sl, following navigator fix step is also comprised:
Supervisory control comuter judges the locator data that satellite navigation unit transmission comes:
If locator data is in normal range (NR):, supervisory control comuter by the locator data that receives stored in memory;
The described locator data in normal range (NR) refers to: the longitude of two sampled points adjacent in locator data, latitude value, height value are compared between two, if the difference of the longitude of adjacent two sampled points is no more than 0.0002 degree, and the difference of the latitude of adjacent two sampled points is no more than 0.00018 degree, and the difference of the height of adjacent two sampled points is no more than 20 meters, judge that locator data is as normal range (NR);
If locator data occurs abnormal:, the locator data stored in memory recalls by supervisory control comuter, turns back to homeposition according to historical track;
There is abnormal referring in described locator data: the longitude of two sampled points adjacent in locator data, latitude value, height value is compared between two, if the difference of longitude is more than 0.0002 degree, or the difference of latitude is more than 0.00018 degree, or the difference of height is more than 20 meters, then judge that locator data occurs abnormal.
Preferably, described locator data is longitude information x, the latitude information y of unmanned plane at each time point, the set of elevation information z, is designated as { xtytzt}; Wherein,
(x1y1z1) for unmanned plane is at longitude, latitude, the elevation information of the 1st time point;
(x2y2z2) for unmanned plane is at longitude, latitude, the elevation information of the 2nd time point;
By that analogy, (xt-1yt-1zt-1) for unmanned plane t-1 time point longitude, latitude, elevation information; (xtytzt) for unmanned plane is at longitude, latitude, the elevation information of t time point;
The interval of adjacent two time points gets 0.5 to 5.0 second; Each historical location data is all stored in the memory of supervisory control comuter 11;
The locator data of t time point and the locator data of t-1 time point are compared:
If xt-xt-1 < 0.0002, and yt-yt-1 < 0.00018, and zt-zt-1 < 20 meters,
Namely the difference of longitude is no more than 0.0002 degree, and the difference of latitude is no more than 0.00018 degree, when the difference of height is no more than 20 meters, judge that the locator data of t time point belongs to normal range (NR), and by the memory of the locator data of this t time point stored in supervisory control comuter 11;
If xt-xt-1 >=0.0002, or yt-yt-1 >=0.00018, or zt-zt-1 >=20 meter; Any one in the difference of the i.e. difference of the difference of longitude, latitude, height exceeds normal range (NR), all judges that the locator data of t time point there occurs exception, also namely thinks that the flight of unmanned plane there occurs exception;
By supervisory control comuter by the locator data of t-1 time point in memory, a t-2 time point locator data ... the locator data of the 2nd time point, the locator data of the 1st time point successively read, and control the departure place that unmanned vehicle returns according to original track.
Preferably, in step sl, monitoring program comprises application layer program, real-time task scheduler and external interrupt processor, hardware initialization program, hardware drive program, CAN communication protocol procedure, LAN (TCP/IP) communication protocol program, described application layer program is connected with real-time task scheduler and external interrupt processor, described real-time task scheduler is connected with hardware initialization program with external interrupt processor, and described hardware initialization program is connected with hardware drive program.
Preferably, described application layer program comprise Applied layer interface program, power management and electric quantity monitoring program, the indicator light control program that flies, security control program, visual spatial attention program, flight tracking control program, augmentation control program, remote control decoding program, communication processing program.
Preferably, in step s 2, can to adopt in following steps one or more processes video image:
S21: data receipt unit receives the Image Coding stream comprising image coded data and parameter.
Data receipt unit receives the Image Coding stream comprising image coded data and parameter.Parameter change unit can change the parameter that data receipt unit receives.Decoding unit is decoded by the Image Coding stream of the parameter changed the image coded data and parameter change unit that comprise data receipt unit reception, synthetic image decoded data.Image identification unit is to the identification of image decoding data carries out image.
Thus, parameter can be changed rapidly in a suitable manner when not affecting by propagation delay, improving image recognition rate thus.This is because the parameter comprised in Image Coding stream is transmitted, so this can be appropriately changed the parameter for being suitable for the image recognition in image received device by the encoder in image transfer apparatus.
S22: the index based on indicating image recognition accuracy changes parameter.
Image identification unit calculates the index of indicating image recognition accuracy in image recognition processes.Parameter change unit changes based on the index of the indicating image recognition accuracy calculated in image recognition processes the parameter received by data receipt unit.
This more suitably can change parameter for image recognition.
S23: the environmental information based on image received device changes parameter.
Parameter change unit changes based on the environmental information of image received device the parameter received by data receipt unit.
S24: change parameter according to ruuning situation.
Parameter change unit changes the parameter of data receipt unit reception according to the ruuning situation of unmanned plane.
S25: the parameter changing deblocking filter
Decoding unit comprises deblocking filter.Parameter change unit change as the parameter received by data receipt unit, indicate whether for image coded data utilize in the parameter of deblocking filter and the filter coefficient of deblocking filter at least one.
Thus, when image recognition rate is not high enough, reduce the intensity of deblocking filter to avoid the suppression of the high fdrequency component to image, or reduce suppression degree, improve discrimination thus.
S26: change quantization parameter
Decoding unit comprises inverse quantization unit.Described parameter contains the quantization parameter of the quantification comprised in the coding for synthetic image coded data.Parameter change unit changes the quantization parameter contained in the parameter of data receipt unit reception, then this quantization parameter is supplied to inverse quantization unit.
Thus, when image recognition rate is not high enough, increase quantization parameter, thus amplify and emphasize predicated error component, improve discrimination thus.
S27: change orthogonal transform coefficient
Decoding unit comprises orthogonal inverse transform unit.Described parameter contains the orthogonal transform coefficient for the orthogonal transform in order to comprise in the coding performed by synthetic image coded data.Parameter change unit changes the orthogonal transform coefficient contained in the parameter received by data receipt unit, then described coefficient is supplied to orthogonal inverse transform unit.
Thus, when image recognition rate is not high enough, orthogonal transform coefficient can be changed, to improve discrimination.Such as, delete the high-frequency range of orthogonal transform coefficient, thus allow the frequency component of the decoded picture inputing to image identification unit to mate with the frequency component needed for image recognition.
Preferably, in step s3, multichannel dissemination system detects channel, and select optimum channel, priority is followed successively by: short range wireless transmission, mobile communication transmission, satellite communication transmission.
Preferably, in step s 4 which, following sub-step is comprised:
S41. video file dispenser is split video file;
S42. video compression encoder compresses the file split;
S43. encryption device is encrypted operation to the video file compressed.
Preferably, in step s3, multichannel discharge device selects one or more channel to carry out the transmission of video file, and multichannel distribution module is monitored channel simultaneously, carries out rational channel switching when channel resource changes.
Preferably, when channel switches, video file is transmitted by two channels simultaneously, after treating that transmission is stable, center image treatment system shields original transmitted source, now, multichannel discharge device stops this transmission, ensures that monitored picture is uninterrupted when channel switches.
Preferably, in step s 4 which, after the decryption device of central site image processing module is decrypted for video file, decoding device is decoded to file, and display device carries out video and shows in real time.
The present invention has the following advantages and beneficial effect: (1) supports that high-definition digital image passes ground back in real time, meets high-definition digital transmission requirement, supports that vision guided navigation, obstacle avoidance and images steganalysis are followed the tracks of, meets development of new techniques requirement; (2) suitably can change parameter when not affecting by propagation delay, improving image recognition rate thus; (3) this equipment is by satellite communication network pattern and conventional communication mode being merged, only need a set of Video Image Collecting System Based and multichannel dissemination system equipment, just can by two kinds of communication link bonding transmission tone vision signals, emergency command communication bandwidth cost is reduced, and the scope of application is promoted.
Accompanying drawing explanation
Fig. 1 shows the block diagram that the aerial high definition multidimensional of a kind of high power zoom unmanned plane of the present invention investigates transmission system in real time.
Fig. 2 shows the aerial high definition multidimensional of a kind of high power zoom unmanned plane of the present invention and investigates transmission method in real time.
Embodiment
Fig. 1 shows the aerial high definition multidimensional of a kind of high power zoom unmanned plane of the present invention and investigates transmission system in real time.This system comprises: be arranged on the image monitor 1 in unmanned plane and the video frequency transmitter 2 being arranged on ground central station.
Wherein, image monitor 1 comprises: be arranged on the supervisory control comuter 11 on unmanned plane, satellite navigation unit 13, high definition high power zoom motion video camera 12, machine end image processing module 14 and video image wireless transmitter module 15.
Described supervisory control comuter 11 is also embedded with Ethernet switching chip (LANswitch), and described Ethernet switching chip (LANswitch) is connected by local area network (LAN) (LAN) with supervisory control comuter 11 (ARM),
Described machine end image processing module 14 is connected with described supervisory control comuter with 100 m ethernet mouth, the Ethernet exchanging formula bus expanded by the Ethernet switching chip (LANswitch) of described supervisory control comuter receives the picture that high definition moving camera is passed back, the analysis carrying out image is resolved, and merge with light stream transducer, ultrasonic sensor, Inertial Measurement Unit data, carry out vision guided navigation, obstacle avoidance, images steganalysis tracking.
Data receipt unit receives grouped data, and extracts Image Coding stream from described grouped data.Image Coding stream is called as the coded image data that basic (elementary) flow.Such as, some substantially stream meet the coding standard H.264 of such as MPEG-2 (MPEG: motion picture expert group) and HEVC (high efficiency Video coding), have the double-decker be at least made up of sequence level and picture level, each level comprises header portion and data division.Header portion contains the various various parameters for encoding.Described parameter is utilized to decode as decoding parametric data portion by typical decoder.Parameter change unit changes parameter in Image Coding stream and the Image Coding stream containing the parameter after changing is supplied to decoder.Decoder utilizes the parameter after the change in Image Coding stream to decode to the data division of Image Coding stream as decoding parametric, thus generates decoded picture.Object etc. in image identification unit detection, identification, tracking decoded picture.
Image identification unit calculates the index of indicating image recognition accuracy in image recognition processes, and parameter change unit changes based on the index of the indicating image recognition accuracy calculated in image recognition processes the parameter received by data receipt unit.
The parameter change method will specifically describing parameter change unit and carry out below.By the parameter in the header by containing in Image Coding stream to be generated by cell encoder and the value of adding changes into another value.Assuming that decoded picture is checked for people, cell encoder to be generated and the parameter of adding is optimized to suppress image deterioration.The appropriate value that described parameter is not always set in for the identification in image identification unit.Thus, the parameter change in the header by containing in the Image Coding stream of network reception is the appropriate value for the identification in image identification unit by parameter change unit.This can improve the image recognition rate in image recognition unit.Can change described parameter rapidly according to suitable mode and the impact of propagation delay that is not subject to, these are different from the situation changing the parameter value that encoder generates.
Now, image recognition unit preferably calculates the index that indicator diagram resembles recognition accuracy in image recognition processes, then index is supplied to parameter change unit, and parameter change unit preferably changes described parameter according to the index of indicating image recognition accuracy.This is because the image recognition can implemented for image recognition unit more suitably changes parameter value.
Such as, the index of indicating image recognition accuracy is the index of the accuracy of the result that the image in indicating image recognition unit detects, identifies and follows the tracks of, and is the information about identified region or image recognition area information.Can according to the threshold value of the similarity in each process of instruction or the accuracy determining identification and testing result according to passed through discriminator (discriminator) progression.The following algorithm for identifying and detect and application can be utilized by various method to be determined the accuracy of identification and testing result.
Decoding unit comprises deblocking filter, parameter change unit change as the parameter received by data receipt unit, indicate whether for image coded data utilize in the parameter of deblocking filter and the filter coefficient of deblocking filter at least one.
Decoding unit comprises inverse quantization unit, and described parameter contains the quantization parameter comprised in the coding for synthetic image coded data.Parameter change unit changes the quantization parameter contained in the parameter of data receipt unit reception, then this quantization parameter is supplied to inverse quantization unit.
Decoding unit comprises orthogonal inverse transform unit.Described parameter contains the orthogonal transform coefficient for the orthogonal transform in order to comprise in the coding performed by synthetic image coded data.Parameter change unit changes the orthogonal transform coefficient contained in the parameter received by data receipt unit, then described coefficient is supplied to orthogonal inverse transform unit.
Described supervisory control comuter 11 has image coding unit, the image that high definition high power zoom motion video camera obtains is encoded, then machine end image processing module receives the Image Coding stream generated by described Image Coding by data receipt unit, and parameter change unit changes the parameter of data receipt unit reception according to the ruuning situation of unmanned plane.
The Ethernet exchanging formula bus that described high definition high power zoom motion video camera 12 is directly expanded by Ethernet interface and supervisory control comuter 11 is connected, support the forwarding of multiple video flowing, by Ethernet switching chip (LANswitch), HD video data are passed to machine end image processing module (DSP+ARM) and carry out image calculating.
Described video image wireless transmitter module 15 can compatible multi-signal emission mode, comprises short range wireless transmission, satellite-signal emission mode, 3G/4G movable signal emission mode etc.
Described satellite navigation unit 13 is GPS/ Big Dipper receiving chip, magnetic compass, single-chip microcomputer, go out CAN to be connected with supervisory control comuter (ARM), support GPS and Beidou navigation location, support magnetometer resolving attitude of flight vehicle, and carry out data fusion with Inertial Measurement Unit (IMU), finally resolve attitude of flight vehicle and position of aircraft by supervisory control comuter 11.
Video frequency transmitter 2 comprises: video image receiver module 21, multichannel distribution module 22, central site image processing module 23 and display terminal 24.Described video image receiver module 21, receives through satellite network or mobile communications network the picture signal that described image emissions module launches 14; Described multichannel distribution module 22 is by video compression encoder, multichannel communication discharge device, communication equipment, gateway device forms, and described communication equipment comprises wired transmission equipment, short-range wireless communication apparatus, mobile communication equipment, satellite communication equipment, described center image treatment system is by decoding device, and image display forms.
Multichannel dissemination system is by the detection for existing channel, find optimum channel, the video that video compression encoder collects Video Image Collecting System Based and image carry out compressed encoding, reduce file size, reduce channel pressure, carry out video file transfer by optimum channel, by video file just, transfer to the webserver, center image treatment system access internet public network, carries out real-time decoding to video file, and is presented on image display.
Described multichannel discharge device is provided with encryption device, described central site image processing system is provided with decryption device, after adopting this design, by the encryption for data, thus ensure that the fail safe in data transmission procedure, adopt hardware encipher and hardware decryption equipment, software is made to crack difficulty very large, even if someone has intercepted and captured relevant file, but owing to there is no corresponding hardware, also be difficult to the deciphering carrying out file, farthest ensure that the fail safe of transfer files.
Described mobile communication equipment adopts multiple network standard equipment, compatible 3G and 4G network.After adopting this design, 3G is basicly stable in country, 4G high speed development, present stage, it is the stage that 3G and 4G coexists, two kinds of standards can meet the demand of transmission tone video file, because the difference of its coverage rate and coverage strength, adopt the method for compatible 3G and 4G to be optimal selection, the volume of transmitted data of 4G is larger, but coverage rate is poor, High-Quality Video Transmission is carried out in the place being adapted at having 4G signal, 3G coverage rate is relatively wider, but volume of transmitted data is smaller, is adapted at not having the place of 4G signal to carry out transmission of video.
Described satellite communication equipment comprises satellite antenna, satellite power amplifier, LNB, satellite modem, after adopting this design, by this satellite communication equipment, can realize video data and be transmitted by satellite-signal, improve the equipment scope of application.
Fig. 2 shows the aerial high definition multidimensional of a kind of high power zoom unmanned plane of the present invention and investigates transmission method in real time.The method specifically comprises the steps:
S1. supervisory control comuter starts monitoring program, and described satellite navigation unit starts GPS navigation program;
S2. high definition high power zoom motion video camera gathers video image according to the track of monitoring program, and machine end image processing module processes image;
S3. video image wireless transmitter module, and video image receiver module, has coordinated wireless transmission and the reception of picture signal;
S4. central site image processing module processes the picture signal received, and shows on display terminal.
Preferably, in step sl, following navigator fix step is also comprised:
Supervisory control comuter 11 pairs of satellite navigation unit 13 transmit the locator data come and judge:
If locator data is in normal range (NR):, supervisory control comuter 11 by the locator data that receives stored in memory;
The described locator data in normal range (NR) refers to: the longitude of two sampled points adjacent in locator data, latitude value, height value are compared between two, if the difference of the longitude of adjacent two sampled points is no more than 0.0002 degree, and the difference of the latitude of adjacent two sampled points is no more than 0.00018 degree, and the difference of the height of adjacent two sampled points is no more than 20 meters, judge that locator data is as normal range (NR);
If locator data occurs abnormal:, the locator data stored in memory recalls by supervisory control comuter 11, turns back to homeposition according to historical track;
There is abnormal referring in described locator data: the longitude of two sampled points adjacent in locator data, latitude value, height value is compared between two, if the difference of longitude is more than 0.0002 degree, or the difference of latitude is more than 0.00018 degree, or the difference of height is more than 20 meters, then judge that locator data occurs abnormal.
Preferably, described locator data is longitude information x, the latitude information y of unmanned plane at each time point, the set of elevation information z, is designated as { xtytzt}; Wherein,
(x1y1z1) for unmanned plane is at longitude, latitude, the elevation information of the 1st time point;
(x2y2z2) for unmanned plane is at longitude, latitude, the elevation information of the 2nd time point;
By that analogy, (xt-1yt-1zt-1) for unmanned plane t-1 time point longitude, latitude, elevation information; (xtytzt) for unmanned plane is at longitude, latitude, the elevation information of t time point;
The interval of adjacent two time points gets 0.5 to 5.0 second; Each historical location data is all stored in the memory of supervisory control comuter 11;
The locator data of t time point and the locator data of t-1 time point are compared:
If xt-xt-1 < 0.0002, and yt-yt-1 < 0.00018, and zt-zt-1 < 20 meters,
Namely the difference of longitude is no more than 0.0002 degree, and the difference of latitude is no more than 0.00018 degree, when the difference of height is no more than 20 meters, judge that the locator data of t time point belongs to normal range (NR), and by the memory of the locator data of this t time point stored in supervisory control comuter 11;
If xt-xt-1 >=0.0002, or yt-yt-1 >=0.00018, or zt-zt-1 >=20 meter; Any one in the difference of the i.e. difference of the difference of longitude, latitude, height exceeds normal range (NR), all judges that the locator data of t time point there occurs exception, also namely thinks that the flight of unmanned plane there occurs exception;
By supervisory control comuter 11 by the locator data of t-1 time point in memory, a t-2 time point locator data ... the locator data of the 2nd time point, the locator data of the 1st time point successively read, and control the departure place that unmanned vehicle returns according to original track.
Preferably, in step sl, monitoring program comprises application layer program, real-time task scheduler and external interrupt processor, hardware initialization program, hardware drive program, CAN communication protocol procedure, LAN (TCP/IP) communication protocol program, described application layer program is connected with real-time task scheduler and external interrupt processor, described real-time task scheduler is connected with hardware initialization program with external interrupt processor, and described hardware initialization program is connected with hardware drive program.
Preferably, described application layer program comprise Applied layer interface program, power management and electric quantity monitoring program, the indicator light control program that flies, security control program, visual spatial attention program, flight tracking control program, augmentation control program, remote control decoding program, communication processing program.
Preferably, in step s 2, can to adopt in following steps one or more processes video image:
S21: data receipt unit receives the Image Coding stream comprising image coded data and parameter.
Data receipt unit receives the Image Coding stream comprising image coded data and parameter.Parameter change unit can change the parameter that data receipt unit receives.Decoding unit is decoded by the Image Coding stream of the parameter changed the image coded data and parameter change unit that comprise data receipt unit reception, synthetic image decoded data.Image identification unit is to the identification of image decoding data carries out image.
Thus, parameter can be changed rapidly in a suitable manner when not affecting by propagation delay, improving image recognition rate thus.This is because the parameter comprised in Image Coding stream is transmitted, so this can be appropriately changed the parameter for being suitable for the image recognition in image received device by the encoder in image transfer apparatus.
S22: the index based on indicating image recognition accuracy changes parameter.
Image identification unit calculates the index of indicating image recognition accuracy in image recognition processes.Parameter change unit changes based on the index of the indicating image recognition accuracy calculated in image recognition processes the parameter received by data receipt unit.
This more suitably can change parameter for image recognition.
S23: the environmental information based on image received device changes parameter.
Parameter change unit changes based on the environmental information of image received device the parameter received by data receipt unit.
S24: change parameter according to ruuning situation.
Parameter change unit changes the parameter of data receipt unit reception according to the ruuning situation of unmanned plane.
S25: the parameter changing deblocking filter
Decoding unit comprises deblocking filter.Parameter change unit change as the parameter received by data receipt unit, indicate whether for image coded data utilize in the parameter of deblocking filter and the filter coefficient of deblocking filter at least one.
Thus, when image recognition rate is not high enough, reduce the intensity of deblocking filter to avoid the suppression of the high fdrequency component to image, or reduce suppression degree, improve discrimination thus.
S26: change quantization parameter
Decoding unit comprises inverse quantization unit.Described parameter contains the quantization parameter of the quantification comprised in the coding for synthetic image coded data.Parameter change unit changes the quantization parameter contained in the parameter of data receipt unit reception, then this quantization parameter is supplied to inverse quantization unit.
Thus, when image recognition rate is not high enough, increase quantization parameter, thus amplify and emphasize predicated error component, improve discrimination thus.
S27: change orthogonal transform coefficient
Decoding unit comprises orthogonal inverse transform unit.Described parameter contains the orthogonal transform coefficient for the orthogonal transform in order to comprise in the coding performed by synthetic image coded data.Parameter change unit changes the orthogonal transform coefficient contained in the parameter received by data receipt unit, then described coefficient is supplied to orthogonal inverse transform unit.
Thus, when image recognition rate is not high enough, orthogonal transform coefficient can be changed, to improve discrimination.Such as, delete the high-frequency range of orthogonal transform coefficient, thus allow the frequency component of the decoded picture inputing to image identification unit to mate with the frequency component needed for image recognition.
Preferably, in step s3, multichannel dissemination system detects channel, and select optimum channel, priority is followed successively by: short range wireless transmission, mobile communication transmission, satellite communication transmission.
Preferably, in step s 4 which, following sub-step is comprised:
S41. video file dispenser is split video file;
S42. video compression encoder compresses the file split;
S43. encryption device is encrypted operation to the video file compressed.
Preferably, in step s3, multichannel discharge device selects one or more channel to carry out the transmission of video file, and multichannel distribution module is monitored channel simultaneously, carries out rational channel switching when channel resource changes.
Preferably, when channel switches, video file is transmitted by two channels simultaneously, after treating that transmission is stable, center image treatment system shields original transmitted source, now, multichannel discharge device stops this transmission, ensures that monitored picture is uninterrupted when channel switches.
Preferably, in step s 4 which, after the decryption device of central site image processing module is decrypted for video file, decoding device is decoded to file, and display device carries out video and shows in real time.
As mentioned above, although the embodiment limited according to embodiment and accompanying drawing are illustrated, various amendment and distortion can be carried out from above-mentioned record concerning the technical staff that the art has a general knowledge.Such as, carry out according to the order mutually different from method illustrated in the technology illustrated, and/or carry out combining or combining according to the form mutually different from the method illustrated by the inscape such as system, structure, device, circuit illustrated, or carry out replacing or replacing also can reaching suitable effect according to other inscapes or equipollent.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some equivalent to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the aerial high definition multidimensional of high power zoom unmanned plane investigates transmission method in real time.The method specifically comprises the steps:
S1. supervisory control comuter starts monitoring program, and described satellite navigation unit starts GPS navigation program;
S2. high definition high power zoom motion video camera gathers video image according to the track of monitoring program, and machine end image processing module processes image;
S3. video image wireless transmitter module, and video image receiver module, has coordinated wireless transmission and the reception of picture signal;
S4. central site image processing module processes the picture signal received, and shows on display terminal;
Wherein, in step s 2, can to adopt in following steps one or more processes video image:
S21: data receipt unit receives the Image Coding stream comprising image coded data and parameter;
S22: the index based on indicating image recognition accuracy changes parameter;
S23: the environmental information based on image received device changes parameter;
S24: change parameter according to ruuning situation;
S25: the parameter changing deblocking filter;
S26: change quantization parameter;
S27: change orthogonal transform coefficient.
2. the method for claim 1, is characterized in that, in step sl, also comprises following navigator fix step:
Supervisory control comuter judges the locator data that satellite navigation unit transmission comes:
If locator data is in normal range (NR):, supervisory control comuter by the locator data that receives stored in memory;
The described locator data in normal range (NR) refers to: the longitude of two sampled points adjacent in locator data, latitude value, height value are compared between two, if the difference of the longitude of adjacent two sampled points is no more than 0.0002 degree, and the difference of the latitude of adjacent two sampled points is no more than 0.00018 degree, and the difference of the height of adjacent two sampled points is no more than 20 meters, judge that locator data is as normal range (NR);
If locator data occurs abnormal:, the locator data stored in memory recalls by supervisory control comuter, turns back to homeposition according to historical track;
There is abnormal referring in described locator data: the longitude of two sampled points adjacent in locator data, latitude value, height value is compared between two, if the difference of longitude is more than 0.0002 degree, or the difference of latitude is more than 0.00018 degree, or the difference of height is more than 20 meters, then judge that locator data occurs abnormal.
3. method as claimed in claim 2, it is characterized in that, described locator data is longitude information x, the latitude information y of unmanned plane at each time point, the set of elevation information z, is designated as { xtytzt}; Wherein,
(x1y1z1) for unmanned plane is at longitude, latitude, the elevation information of the 1st time point;
(x2y2z2) for unmanned plane is at longitude, latitude, the elevation information of the 2nd time point;
By that analogy, (xt-1yt-1zt-1) for unmanned plane t-1 time point longitude, latitude, elevation information; (xtytzt) for unmanned plane is at longitude, latitude, the elevation information of t time point;
The interval of adjacent two time points gets 0.5 to 5.0 second; Each historical location data is all stored in the memory of supervisory control comuter 11;
The locator data of t time point and the locator data of t-1 time point are compared:
If xt-xt-1 < 0.0002, and yt-yt-1 < 0.00018, and zt-zt-1 < 20 meters,
Namely the difference of longitude is no more than 0.0002 degree, and the difference of latitude is no more than 0.00018 degree, when the difference of height is no more than 20 meters, judge that the locator data of t time point belongs to normal range (NR), and by the memory of the locator data of this t time point stored in supervisory control comuter 11;
If xt-xt-1 >=0.0002, or yt-yt-1 >=0.00018, or zt-zt-1 >=20 meter; Any one in the difference of the i.e. difference of the difference of longitude, latitude, height exceeds normal range (NR), all judges that the locator data of t time point there occurs exception, also namely thinks that the flight of unmanned plane there occurs exception;
By supervisory control comuter by the locator data of t-1 time point in memory, a t-2 time point locator data ... the locator data of the 2nd time point, the locator data of the 1st time point successively read, and control the departure place that unmanned vehicle returns according to original track.
4. the method for claim 1, it is characterized in that, in step sl, monitoring program comprises application layer program, real-time task scheduler and external interrupt processor, hardware initialization program, hardware drive program, CAN communication protocol procedure, LAN (TCP/IP) communication protocol program, described application layer program is connected with real-time task scheduler and external interrupt processor, described real-time task scheduler is connected with hardware initialization program with external interrupt processor, and described hardware initialization program is connected with hardware drive program.
5. method as claimed in claim 4, it is characterized in that, described application layer program comprises Applied layer interface program, power management and electric quantity monitoring program, the indicator light control program that flies, security control program, visual spatial attention program, flight tracking control program, augmentation control program, remote control decoding program, communication processing program.
6. the method for claim 1, is characterized in that, in step s3, multichannel dissemination system detects channel, and select optimum channel, priority is followed successively by: short range wireless transmission, mobile communication transmission, satellite communication transmission.
7. the method for claim 1, is characterized in that, in step s 4 which, comprises following sub-step:
S41. video file dispenser is split video file;
S42. video compression encoder compresses the file split;
S43. encryption device is encrypted operation to the video file compressed.
8. the method for claim 1, it is characterized in that, in step s3, multichannel discharge device selects one or more channel to carry out the transmission of video file, multichannel distribution module is monitored channel simultaneously, carries out rational channel switching when channel resource changes.
9. method as claimed in claim 8, it is characterized in that, when channel switches, video file is transmitted by two channels simultaneously, and after treating that transmission is stable, center image treatment system shields original transmitted source, now, multichannel discharge device stops this transmission, ensures that monitored picture is uninterrupted when channel switches.
10. method as claimed in claim 9, is characterized in that, in step s 4 which, after the decryption device of central site image processing module is decrypted for video file, decoding device is decoded to file, and display device carries out video and shows in real time.
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