CN103324523B - The three-dimensional earth of a kind of combination look soon client - Google Patents

The three-dimensional earth of a kind of combination look soon client Download PDF

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CN103324523B
CN103324523B CN201310256157.6A CN201310256157A CN103324523B CN 103324523 B CN103324523 B CN 103324523B CN 201310256157 A CN201310256157 A CN 201310256157A CN 103324523 B CN103324523 B CN 103324523B
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information
data
satellite
buf
thread
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CN103324523A (en
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李运伟
喻文勇
徐建艳
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China Center for Resource Satellite Data and Applications CRESDA
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China Center for Resource Satellite Data and Applications CRESDA
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Abstract

The three-dimensional earth of combination look soon a client, comprise that data receiver and processing threads, window play up thread, placename-querying thread, between each thread, carry out information exchange by QvInfo structure; Configuration module from configuration file reading information for other three threads; Data receiver and processing threads receive preview data, and the view data receiving is carried out to resampling processing, and satellite assistance data information is carried out to dissection process, and data after treatment are stored in QvInfo structure; The longitude and latitude that this sensor optical axis of placename-querying thread computes points to point is sent to WMS service; Receive the GetInfo data structure of WMS service feedback and resolve by network, obtaining sensor optical axis and point to the information of place names corresponding to longitude and latitude of point and leave in QvInfo structure; Window is played up thread rendered image data, satellite assistance data information and information of place names, calculates attitude and the position of three-dimensional earth Satellite threedimensional model, and completes satellite threedimensional model playing up in the three-dimensional earth.

Description

The three-dimensional earth of a kind of combination look soon client
Technical field
What the present invention relates to the three-dimensional earth of a kind of combination looks client soon.
Background technology
The image that earth observation satellite passes is down carrying out radiation, before geometric correction is processed, needs first original to what receiveData are removed form, the splicing record of decompression and image etc., and these are known as the collecting work of satellite image.
In gatherer process, look soon client simultaneously by the satellite image after simple sampling and attitude orbit information at that timeIn terminal, show. Send to the packet of looking soon client to contain three parts:
1, preview data descriptor (fast visual information head): preview data frame length.
2, the satellite assistance data information of accompanying image: satellite name, sensor name, grounded receiving station name, imaging row counting,GPS position and the speed of satellite, the attitude of satellite, and satellite imagery moment, GPS are obtained the moment, attitude is obtained the standard in momentThe really time.
3, through sampling for the first time, the thick registration of wave band, standardization (pixel depth is unified to 8bit) afterwards by band image.
Be that above-mentioned information is passed through to played in order out on terminal machine depending on the object of client soon, showing SatelliteIn the process of lower point, because satellite flight speed is exceedingly fast, latitude and longitude information changes fast on window, and ground staff believes from theseBreath just can be known the imaging region when front sensor.
In existed system, ground system personnel need to possess more rich geographical knowledge or riffle map,The regional location that can understand imaging this moment from longitude and latitude numerical value, is unfavorable for fast satellite image being carried out to interpretation. Particularly existOccur under the state of emergency such as earthquake, if operator on duty can not just connect fast view picture and place, disaster area in acquisition phasePass judgment on imaging effect, just can only wait for this rail image floor treatment through all multi-steps as gather, cataloguing, radiation and geometry schoolsJust, after file, arrive dissemination system and just can know whether this imaging gets the satellite in disaster area effectively after GIS markImage data, may delay the time of several hours.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, looking soon of the three-dimensional earth of a kind of combination is providedClient.
Technical solution of the present invention is: the three-dimensional earth of a kind of combination look soon client, comprise data receiver and locateReason thread, window are played up thread, placename-querying thread, between each thread, carry out information friendship by a self-defining structureChange this structure called after QvInfo;
QvInfo structure comprises buffering area buf, aux structure; Buffering area buf receives and processing threads place for store dataView data after reason, aux structure for store data receive with processing threads satellite assistance data information after treatment andThe information of place names that placename-querying thread obtains;
Configuration module from the configuration file pre-setting reading information for other three threads; Described configurationFile comprises mount message, window configuration information, grounded receiving station configuration information, three-dimensional earth configuration information, the WMS of sensorService configuration information;
Data receiver and processing threads, receive preview data, and described preview data comprises fast visual information head, accompanying imageSatellite assistance data information and view data; And the view data receiving is carried out to resampling processing, and auxiliary to satelliteHelp data message to carry out dissection process, data after treatment are stored in QvInfo structure; Described satellite assistance data letterBreath comprises satellite name, sensor name, and grounded receiving station name, imaging row counting, Satellite Attitude rail information and satellite imagery moment,GPS obtains the moment, attitude is obtained the correct time in moment;
Placename-querying thread reads Satellite Attitude rail information and sensor name from aux structure, according to sensor name from joiningPut the mount message that obtains this sensor in module, and calculate this biography according to the mount message of sensor and Satellite Attitude rail informationSensor optical axis points to the longitude and latitude of point, and this longitude and latitude is sent to WMS service by network; Receive WMS service by network anti-The GetInfo data structure of feedback is also resolved, and obtains sensor optical axis and points to the information of place names corresponding to longitude and latitude of point and leave inIn QvInfo structure;
Window is played up thread and is comprised and look soon display module, auxiliary data display module and three-dimensional earth rendering module; Look soonDisplay module is from buffering area buf reads image data rendered image data; Auxiliary data display module reads in aux structureInformation, play up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads the Satellite Attitude rail in aux structureInformation and sensor name, according to sensor name from obtain the mount message of this sensor from configuration module, according to sensorMount message and Satellite Attitude rail information calculate attitude and the position of three-dimensional earth Satellite threedimensional model, and complete satellite threeDimension model playing up in the three-dimensional earth.
The present invention compared with prior art beneficial effect is: the present invention is by the three-dimensional earth, and the WMS service in GIS service is tiedAltogether, in looking soon the client attitude track digital information in demonstration satellite imagery moment, draw current sensor lightAxle points to the geography information of point, and on the three-dimensional earth, renders satellite threedimensional model. Make anyone can be very rapidEffectively to satellite imagery interpretation, the effect that real performance is looked soon.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated, specific as follows:
What the present invention relates to the three-dimensional earth of a kind of combination looks client soon, comprises three threads, configuration module andIndividual structure; Three threads are respectively data receiver and processing threads, window are played up thread, placename-querying thread, each thread itBetween carry out information exchange by a self-defining structure, in order to introduce conveniently, by this structure called after QvInfo; Distinguish belowEvery part is elaborated:
(1) QvInfo structure
QvInfo structure comprises buffering area buf, aux structure; Buffering area buf receives and processing threads place for store dataView data after reason, aux structure for store data receive with processing threads satellite assistance data information after treatment andThe information of place names that placename-querying thread obtains.
(2) configuration module
Configuration module from the configuration file pre-setting reading information for other three threads; Described configurationFile comprises mount message, window configuration information, three-dimensional earth configuration information, grounded receiving station configuration information, the WMS of sensorService configuration information; Wherein:
Window configuration information: the size of painting canvas, the layout of each viewing area etc.
Three-dimensional earth configuration information: satellite threedimensional model path, scaling, (point of observation is from dimensionally for point of observation scopeThe MINMAXDIST on ball surface) etc.;
The mount message of sensor: the name (unique identification) of various sensors, the network port, ephemeris initial time (is usedAccording to integer timing code computing time), wave band configuration, setting angle, angle of visual field size etc.
Grounded receiving station configuration: the name (unique identification) of various grounded receiving stations, geographical longitude and latitude.
WMS service configuration information: this WMS service is used for providing place name service, and the configuration here comprises WMS address of service,WMS layer name, ground file-name field, the character code of ground file-name field etc.
It should be noted that: must use the different network ports depending on each sensor of client soon, so that distinguishReceive preview data, in addition, multispectral sensor can be set wave band configuration (for example specifying RGB wave band) for the synthesis of vacationColored fast view picture.
(3) data receiver and processing threads
Data receiver and processing threads, receive preview data according to the network port of sensor in configuration module, describedPreview data comprises satellite assistance data information and the view data of fast visual information head, accompanying image; Utilize fast visual information headPreview data is carried out synchronously, distinguishing view data and satellite assistance data information; And the view data receiving is carried out to weightSampling processing, and satellite assistance data information is carried out to dissection process, data after treatment are stored in QvInfo structure;Described satellite assistance data information comprises satellite name, sensor name, grounded receiving station name, imaging row counting, Satellite Attitude rail letterBreath (GPS position and the speed of satellite, the attitude of satellite) and satellite imagery moment, GPS obtain moment, attitude and obtain the momentCorrect time.
The view data of sending due to collection generally comprises multiple wave bands, and the general window that exceeds far away of picture traverse is joinedPut the canvas size in information, therefore, need to be combined into false color according to the setting wave band configuration in configuration module to multiple wave bandsLook wave band, and set again sampling ratio and carry out resampling to adapt to canvas size.
Receive and the fast visual information head of processing threads analysis, draw the wave band number of fast view picture, the pixel number of every wave band, in conjunction withSetting wave band configuration in current sampling ratio again and configuration module, determines the processing method adopting. If wave band tilingPattern, while writing buf
Buf wave band number=actual wave band number,
Buf width=actual wave band is counted * wave band pixel number/sampling ratio again
The OpenGL voxel model of buf is GL_LUMINANCE
If false color mode, while writing buf
Buf wave band number=3,
Buf width=wave band pixel number/sampling ratio again
The OpenGL voxel model of buf is GL_RGB
Processing in fast view picture, receive with processing threads also to soon depending on satellite assistance data resolve,Draw after the gps data (position, speed) under WGS84 coordinate, they are transformed under OpenGL drawing coordinate system. In addition, adoptIt is generally the integer second of starting at from a certain moment that the satellite imagery moment that collection sends and GPS obtain the moment, therefore auxiliaryIn Data Analysis process, need, according to the ephemeris initial time in configuration module, integer is converted to calendar time second.
(4) placename-querying thread
Placename-querying thread reads Satellite Attitude rail information and sensor name from aux structure, according to sensor name from joiningPut the mount message that obtains this sensor in module, and cross to push away according to the mount message of sensor and Satellite Attitude rail information exchange and sweepThe strict imaging model of type remotely sensed image satellite calculates the longitude and latitude of this sensor optical axis sensing point, and this longitude and latitude is passed through to networkBe sent to WMS service; Receive the GetInfo data structure of WMS service feedback and resolve by network, obtaining sensor optical axis and refer toTo the information of place names corresponding to longitude and latitude of point and leave in QvInfo structure.
(5) window is played up thread
Window is played up thread and is comprised and look soon display module, auxiliary data display module and three-dimensional earth rendering module; Look soonDisplay module is from buffering area buf reads image data rendered image data; Auxiliary data display module reads in aux structureInformation, plays up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads the Satellite Attitude rail letter in aux structureCease and sensor name, from configuration module, obtain the mount message of this sensor according to sensor name, according to the peace of sensorDress information and Satellite Attitude rail information are calculated attitude and the position of three-dimensional earth Satellite threedimensional model, and complete the three-dimensional mould of satelliteType playing up in the three-dimensional earth.
In each three-dimensional rendering cycle, window is played up the thread drawing district that first clears all, and enables reduction. The object of reducingThat each object of playing up in region is limited in its border.
Looking soon in display module, set projection pattern for just penetrating. From buf buffered copy pixel to video memory texture, according toDisplay mode (wave band tiling or false colored) difference, need to copy different texture unit to. Observing pattern has 3 kinds, copy sideMethod is also different:
Refresh mode: user sees that fast view picture (falls rail imaging) from top to bottom or (rail lift imaging) covering from the bottom upOn existing image, as plastering wall.
Rolling mode: user sees fast view picture from top to bottom or rolls from the bottom up, as from train window outwardObserve.
Pattern shifts the scenes: user sees that fast view switches and shows as split screen, as lantern slide.
Upgrading after texture, on the viewport that texture mapping is specified to reduction.
Three-dimensional earth rendering module is set projection mode for perspective. First it set viewpoint in each cycle of playing up is basisThe calculated value that user's slide block is selected. Computing formula is:
a=(Vmax-Vmin)/(e-1);
V=a*es+(Vmin-a);
In above formula, VmaxAnd VminPoint of observation scope (point of observation is from the minimax distance of three-dimensional earth surface), e is natureLogarithm, s is the scope that user inputs by slide block, linear change between 0 to 1. This formula shines upon the changing value of slide blockTo exponential transform interval, move point of observation height with a level and smooth reasonable manner.
Three-dimensional earth rendering module, having played up after slice map layer and place name figure layer etc., is played up and is defended according to satellite assistance dataStar model and ground histogram layer.
The changes in coordinates of drawing satellite threedimensional model is:
M Model Rending = M WGS 84 Rendering M J 2000 WGS 84 M Body J 2000 M mode l Body
Wherein, model is determined by threedimensional model itself to satellite body transition matrix, and satellite body coordinate is tied to J2000The conversion of coordinate system (also referred to as J2K coordinate system) is definite by GPS orbit information and the attitude Eulerian angles of satellite assistance data,J2000 coordinate is tied to the Time Calculation gained of the conversion of WGS84 coordinate system and satellite assistance data. WGS84 coordinate is tied to plays up seatThe conversion of mark system is determined by three-dimensional earth engine itself.
According to same Coordinate Conversion, and installation matrix and the angle of visual field of combined sensor, can according to strict imaging modelWith calculate the border of sensor scan band, draw out thus look soon through ground banded zone.
Receiving station and number pass passage figure layer according to the earth station's name in satellite assistance data, from configuration module, obtain thisEarth station's latitude and longitude information, then in conjunction with Current GPS orbital position, on the three-dimensional earth, render earth station, draw out number simultaneouslyPass channel status.
Auxiliary data rendering module need to cooperatively interact with placename-querying thread, and its projection mode is also orthogonal projection.Its Coordinate Conversion during according to similar calculating band, show that by GPS track and attitude sensor points to the longitude and latitude of point, and buildsThe GetFeatureInfo request of WMS service, sends to WebGIS server, obtains information of place names. The configuration information of WMS serviceCan from configuration module, obtain equally.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.

Claims (1)

  1. The three-dimensional earth of combination look soon a client, it is characterized in that: comprise that data receiver and processing threads, window play upThread, placename-querying thread, carry out information exchange by a self-defining structure between each thread, this structure called afterQvInfo；
    QvInfo structure comprises buffering area buf, aux structure; After buffering area buf processes for store data reception and processing threadsView data, aux structure for store data receive with processing threads satellite assistance data information after treatment and place nameThe information of place names that inquiry thread obtains;
    Configuration module from the configuration file pre-setting reading information for other three threads; Described configuration fileComprise mount message, window configuration information, grounded receiving station configuration information, three-dimensional earth configuration information, the WMS service of sensorConfiguration information;
    Data receiver and processing threads, receive preview data, and described preview data comprises defending of fast visual information head, accompanying imageStar auxiliary data information and view data; And the view data receiving is carried out to resampling processing, and to satellite supplementary numberIt is believed that breath carries out dissection process, data after treatment are stored in QvInfo structure; Described satellite assistance data packets of informationDraw together satellite name, sensor name, grounded receiving station name, imaging row counting, Satellite Attitude rail information and satellite imagery moment, GPS obtainGet the moment, attitude is obtained the correct time in moment;
    Placename-querying thread reads Satellite Attitude rail information and sensor name from aux structure, according to sensor name from configuration mouldIn piece, obtain the mount message of this sensor, and calculate this sensor according to the mount message of sensor and Satellite Attitude rail informationOptical axis points to the longitude and latitude of point, and this longitude and latitude is sent to WMS service by network; Receive WMS service feedback by networkGetInfo data structure is also resolved, and obtains sensor optical axis and points to the information of place names corresponding to longitude and latitude of point and leave inIn QvInfo structure;
    Window is played up thread and is comprised and look soon display module, auxiliary data display module and three-dimensional earth rendering module; Look soon demonstrationModule is from buffering area buf reads image data rendered image data; Auxiliary data display module reads the letter in aux structureBreath, plays up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads the Satellite Attitude rail information in aux structureAnd sensor name, according to sensor name from obtain the mount message of this sensor from configuration module, according to the peace of sensorDress information and Satellite Attitude rail information are calculated attitude and the position of three-dimensional earth Satellite threedimensional model, and complete the three-dimensional mould of satelliteType playing up in the three-dimensional earth;
    In above-mentioned data receiver and processing threads, data receiver and processing threads analysis fast visual information head, draws fast view pictureWave band number, the pixel number of every wave band, processes in conjunction with current sampling ratio again and the configuration of setting wave band; When display mode isWave band tiled pattern, while writing buf
    Buf wave band number=actual wave band number,
    Buf width=actual wave band is counted * wave band pixel number/sampling ratio again,
    The OpenGL voxel model of buf is GL_LUMINANCE,
    If false color mode, while writing buf
    Buf wave band number=3,
    Buf width=wave band pixel number/sampling ratio again
    The OpenGL voxel model of buf is GL_RGB.
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CN103631565B (en) * 2013-11-13 2016-09-21 北京像素软件科技股份有限公司 The loading method of scenario resources and charger
CN104821007B (en) * 2015-04-15 2018-08-10 中国资源卫星应用中心 A kind of system for carrying out regarding display soon directly on the three-dimensional earth
CN110096562A (en) * 2019-04-23 2019-08-06 北京睿呈时代信息科技有限公司 3 D model construction method, device and equipment in memory, GIS platform
CN112860834A (en) * 2021-02-05 2021-05-28 深圳力维智联技术有限公司 WeBGIS-based third-party map docking device and method
CN115344397B (en) * 2022-10-20 2023-02-10 中科星图测控技术股份有限公司 Real-time target area rapid screening processing method

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