CN103324523A - Quick-look client combined with three-dimensional earth - Google Patents
Quick-look client combined with three-dimensional earth Download PDFInfo
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Abstract
A quick-look client combined with the three-dimensional earth comprises a data receiving and processing thread, a window rendering thread and a geographical name inquiring thread. The threads performs information exchange with one another through a QvInfo structure. A configuration module reads information from a configuration file and provide the information to the three threads. The data receiving and processing thread receives quick-look data, performs resampling to the received images, analyzes satellite auxiliary data, and stores the processed data in the QvInfo structure. The geographical name inquiring thread calculates longitude and latitude of a point pointed by an optical axis of a sensor, transmits the longitude and latitude to a WMS (web mapping service), receives a GetInfo data structure fed back by the WMS, analyzes the GetInfo data structure to obtain the geographical name information corresponding to the longitude and latitude, and stores the geographical name information in the QvInfo structure. The window rendering thread renders the image data, the satellite auxiliary data information and the geographical name information, calculates poses and positions of a satellite three-dimensional model in the three-dimensional earth, and completes rendering of the satellite three-dimensional model in the three-dimensional earth.
Description
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 geometry correction is processed, needs first the raw data that receives to be removed form, and the splicing record of decompression and image etc., these are known as the collecting work of satellite image.
In gatherer process, look soon client and simultaneously the satellite image after the simple sampling and attitude orbit information are at that time shown in terminal.Send to the data of looking soon client and comprise three parts:
1, preview data descriptor (fast visual information head): preview data frame length.
2, the satellite assistance data information of accompanying image: the satellite name, the sensor name, the ground receiving station name, imaging row counting, GPS position and the speed of satellite, the attitude of satellite, and satellite imagery constantly, GPS obtains constantly, attitude is obtained correct time constantly.
3, through for the first time sampling, the thick registration of wave band, standardization (pixel depth is unified to 8bit) afterwards by band image.
The purpose of looking soon client is with above-mentioned information at the terminal machine by played in order out, in the process that shows sub-satellite point, because satellite flight speed is exceedingly fast, latitude and longitude information changes on window fast, and the ground staff just can know the imaging region of working as front sensor from these information.
In existed system, the ground system personnel need to possess more rich geographical knowledge or riffle map, could understand the regional location of this moment imaging from longitude and latitude numerical value, are unfavorable for fast satellite image being carried out interpretation.Particularly under the emergency circumstance such as generation earthquake, if the operator on duty can not just connect the judge imaging effect to fast view picture and place, disaster area in acquisition phase, just can only wait for that this rail image passes through all multi-steps as gathering in floor treatment, cataloguing, radiation and geometry correction, behind the file, arrive and to know that just whether this time imaging gets access to the satellite image data in disaster area effectively, may delay several hours time after dissemination system marks through GIS.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, what the three-dimensional earth of a kind of combination was provided looks client soon.
Technical solution of the present invention is: the three-dimensional earth of a kind of combination look soon client, comprise that data receiver and processing threads, window play up thread, placename-querying thread, carry out message exchange by a self-defining structure between each thread, this structure called after QvInfo;
The QvInfo structure comprises buffer zone buf, aux structure; Buffer zone buf is used for store data and receives view data after processing with processing threads, and the aux structure is used for store data and receives the information of place names that satellite assistance data information after processing with processing threads and placename-querying thread obtain;
Configuration module is altogether other three threads uses of reading information from the configuration file that pre-sets; Described configuration file comprises mount message, window configuration information, ground receiving station configuration information, three-dimensional earth configuration information, the WMS service configuration information of sensor;
Data receiver and processing threads receive preview data, and described preview data comprises satellite assistance data information and the view data of fast visual information head, accompanying image; And to the view data that receives processings that resample, and satellite assistance data information carried out dissection process, the data after the processing are stored in the QvInfo structure; Described satellite assistance data information comprises the satellite name, the sensor name, and the ground receiving station name, imaging row counting, Satellite Attitude rail information and the satellite imagery moment, GPS obtain constantly, attitude is obtained correct time constantly;
The placename-querying thread reads Satellite Attitude rail information and sensor name from the aux structure, from configuration module, obtain the mount message of this sensor according to the sensor name, and according to the mount message of sensor and the longitude and latitude of this sensor optical axis sensing point of Satellite Attitude rail information calculations, this longitude and latitude is sent to the WMS service by network; Receive the GetInfo data structure of WMS service feedback and resolve by network, obtain the sensor optical axis and point to information of place names corresponding to the longitude and latitude of point and leave in the 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 display module from buffer zone buf reads image data and rendered image data; The auxiliary data display module reads the information in the aux structure, plays up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads Satellite Attitude rail information and the sensor name in the aux structure, according to the sensor name from from configuration module, obtaining the mount message of this sensor, according to attitude and the position of the mount message of sensor and the three-dimensional earth Satellite of Satellite Attitude rail information calculations three-dimensional model, and finish satellite three-dimensional model playing up in the three-dimensional earth.
The present invention compared with prior art beneficial effect is: the present invention is with the three-dimensional earth, WMS service in the GIS service combines, when looking soon client demonstration satellite imagery attitude track digital information constantly, draw the geography information that current sensor optical axis points to point, and render the satellite three-dimensional model at the three-dimensional earth.Make anyone can be very quickly and effectively to the satellite imagery interpretation, the effect that real performance is looked soon.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
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, a configuration module and a structure; Three threads are respectively data receiver and processing threads, window are played up thread, placename-querying thread, carry out message exchange by a self-defining structure between each thread, in order to introduce conveniently, with this structure called after QvInfo; The below is elaborated to every part respectively:
(1) QvInfo structure
The QvInfo structure comprises buffer zone buf, aux structure; Buffer zone buf is used for store data and receives view data after processing with processing threads, and the aux structure is used for store data and receives the information of place names that satellite assistance data information after processing with processing threads and placename-querying thread obtain.
(2) configuration module
Configuration module is altogether other three threads uses of reading information from the configuration file that pre-sets; Described configuration file comprises mount message, window configuration information, three-dimensional earth configuration information, ground receiving station configuration information, the WMS service configuration information of sensor; Wherein:
Window configuration information: the size of painting canvas, the layout of each viewing area etc.
Three-dimensional earth configuration information: satellite three-dimensional model path, scaling, observation point scope (observation point is from the MINMAXDIST of three-dimensional earth surface) etc.;
The mount message of sensor: the name of various sensors (unique identification), the network port, ephemeris zero-time (be used for according to integer timing code computing time), wave band configuration, setting angle, field angle size etc.
Ground receiving station configuration: the name of various ground receiving stations (unique identification), geographical longitude and latitude.
WMS service configuration information: this WMS service is used for providing the place name service, and the configuration here comprises the 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: each sensor of looking soon client must use the different network ports, receive preview data so that distinguish, in addition, multispectral sensor can be set wave band configuration (for example specifying the RGB wave band) for the synthesis of false colored fast view picture.
(3) data receiver and processing threads
Data receiver and processing threads, according to the network port reception preview data of sensor in the configuration module, described preview data comprises satellite assistance data information and the view data of fast visual information head, accompanying image; Utilize fast visual information head that preview data is carried out distinguishing view data and satellite assistance data information synchronously; And to the view data that receives processings that resample, and satellite assistance data information carried out dissection process, the data after the processing are stored in the QvInfo structure; Described satellite assistance data information comprises the satellite name, the sensor name, ground receiving station name, imaging row counting, Satellite Attitude rail information (GPS position and the speed of satellite, the attitude of satellite) and the satellite imagery moment, GPS obtain constantly, attitude is obtained correct time constantly;
Generally comprise a plurality of wave bands owing to gathering the view data of sending, and the general canvas size that exceeds in the window configuration information far away of picture traverse, therefore, need to be combined into false colored wave band according to the setting wave band in configuration module configuration to a plurality of wave bands, and set again sampling ratio and resample 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 with current again sampling ratio and the configuration of the setting wave band in the configuration module, determines the disposal route that adopts.If the wave band tiled pattern, when then writing buf
Buf wave band number=actual wave band number,
Buf width=actual wave band is counted the sampling ratio of * wave band pixel number/again
The OpenGL voxel model of buf is GL_LUMINANCE
If false color mode, when then writing buf
Buf wave band number=3,
The sampling ratio of buf width=wave band pixel number/again
The OpenGL voxel model of buf is GL_RGB
When processing fast view picture, receive with processing threads and also the satellite assistance data of looking is soon resolved, behind the gps data (position, speed) that draws under the WGS84 coordinate, they are transformed into OpenGL drawing coordinate system lower.In addition, gather the satellite imagery send constantly and GPS to obtain constantly generally be the integer second of starting at from a certain moment, therefore in auxiliary data resolving, need according to the ephemeris zero-time in the configuration module integer to be converted to calendar time second.
(4) placename-querying thread
The placename-querying thread reads Satellite Attitude rail information and sensor name from the aux structure, from configuration module, obtain the mount message of this sensor according to the sensor name, and cross according to the mount message of sensor and Satellite Attitude rail information exchange and to push away the strict imaging model of sweeping type remotely sensed image satellite and calculate the longitude and latitude that this sensor optical axis points to point, this longitude and latitude is sent to the WMS service by network; Receive the GetInfo data structure of WMS service feedback and resolve by network, obtain the sensor optical axis and point to information of place names corresponding to the longitude and latitude of point and leave in the 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 soon display module from buffer zone buf reads image data and rendered image data; The auxiliary data display module reads the information in the aux structure, plays up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads Satellite Attitude rail information and the sensor name in the aux structure, from configuration module, obtain the mount message of this sensor according to the sensor name, according to attitude and the position of the mount message of sensor and the three-dimensional earth Satellite of Satellite Attitude rail information calculations three-dimensional model, and finish satellite three-dimensional model playing up in the three-dimensional earth.
In each three-dimensional rendering cycle, window is played up the thread district that draws that at first clears all, and enables reduction.The purpose of reducing is that each object of playing up in the zone is limited in its border.
Looking soon in the display module, setting projection pattern for just penetrating.From buf buffered copy pixel to the video memory texture, according to display mode (wave band tiling or false colored) difference, need to copy the different texture unit to.Observing pattern has 3 kinds, and copy method is also different:
Refresh mode: the user see that fast view picture (falls the rail imaging) from top to bottom or from the bottom up (rail lift imaging) cover on the existing image, as plastering wall.
Rolling mode: the user sees fast view picture from top to bottom or rolls from the bottom up, as observing outward from train window.
Pattern shifts the scenes: the user sees that fast view switches demonstration as split screen, as lantern slide.
After upgrading texture, texture is got final product to the viewport of reducing appointment.
Three-dimensional earth rendering module is set projection mode and is perspective.It at first sets the calculated value of viewpoint for selecting according to user's slide block in each cycle of playing up.Computing formula is:
a=(V
max-V
min)/(e-1);
V=a*e
s+(V
min-a);
In the following formula, V
MaxAnd V
MinObservation point scope (observation point is from the minimax distance of three-dimensional earth surface), e is natural logarithm, s is that the user is by the scope of slide block input, linear change between 0 to 1.This formula is mapped to the exponential transform interval to the changing value of slide block, moves the observation point height with a level and smooth reasonable manner.
Three-dimensional earth rendering module is played up dummy satellite and ground histogram layer according to satellite assistance data after having played up slice map layer and place name figure layer etc.
The changes in coordinates of drawing the satellite three-dimensional model is:
Wherein, model is determined by three-dimensional model itself to the satellite body transition matrix, the satellite body coordinate is tied to the conversion of J2000 coordinate system (being also referred to as the J2K coordinate system) then to be determined by GPS orbit information and the attitude Eulerian angle of satellite assistance data, and the J2000 coordinate is tied to the Time Calculation gained of the conversion of WGS84 coordinate system and satellite assistance data.The WGS84 coordinate is tied to the conversion of playing up coordinate system and is determined by three-dimensional earth engine itself.
According to same coordinate conversion, and installation matrix and the field angle of combined sensor, can calculate the border of sensor scan band according to strict imaging model, draw out thus look soon through the ground banded zone.
Receiving station and number pass passage figure layer according to the land station's name in the satellite assistance data, obtain this land station's latitude and longitude information from configuration module, again in conjunction with the Current GPS orbital position, render land station at the three-dimensional earth, draw out simultaneously number and pass channel status.
The auxiliary data rendering module need to cooperatively interact with the placename-querying thread, and its projection mode also is orthogonal projection.Its coordinate conversion during according to similar calculating band draws the longitude and latitude that sensor points to point by GPS track and attitude, and makes up the GetFeatureInfo request of WMS service, sends to the WebGIS server, obtains information of place names.The configuration information of WMS service can obtain from configuration module equally.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (1)
- The three-dimensional earth of combination look soon client, it is characterized in that: comprise that data receiver and processing threads, window play up thread, placename-querying thread, carry out message exchange by a self-defining structure between each thread, this structure called after QvInfo;The QvInfo structure comprises buffer zone buf, aux structure; Buffer zone buf is used for store data and receives view data after processing with processing threads, and the aux structure is used for store data and receives the information of place names that satellite assistance data information after processing with processing threads and placename-querying thread obtain;Configuration module from the configuration file that pre-sets reading information for other three threads; Described configuration file comprises mount message, window configuration information, ground receiving station configuration information, three-dimensional earth configuration information, the WMS service configuration information of sensor;Data receiver and processing threads receive preview data, and described preview data comprises satellite assistance data information and the view data of fast visual information head, accompanying image; And to the view data that receives processings that resample, and satellite assistance data information carried out dissection process, the data after the processing are stored in the QvInfo structure; Described satellite assistance data information comprises the satellite name, the sensor name, and the ground receiving station name, imaging row counting, Satellite Attitude rail information and the satellite imagery moment, GPS obtain constantly, attitude is obtained correct time constantly;The placename-querying thread reads Satellite Attitude rail information and sensor name from the aux structure, from configuration module, obtain the mount message of this sensor according to the sensor name, and according to the mount message of sensor and the longitude and latitude of this sensor optical axis sensing point of Satellite Attitude rail information calculations, this longitude and latitude is sent to the WMS service by network; Receive the GetInfo data structure of WMS service feedback and resolve by network, obtain the sensor optical axis and point to information of place names corresponding to the longitude and latitude of point and leave in the 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 display module from buffer zone buf reads image data and rendered image data; The auxiliary data display module reads the information in the aux structure, plays up satellite assistance data information and information of place names; Three-dimensional earth rendering module reads Satellite Attitude rail information and the sensor name in the aux structure, according to the sensor name from from configuration module, obtaining the mount message of this sensor, according to attitude and the position of the mount message of sensor and the three-dimensional earth Satellite of Satellite Attitude rail information calculations three-dimensional model, and finish satellite three-dimensional model playing up in the three-dimensional earth.
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| CN104821007A (en) * | 2015-04-15 | 2015-08-05 | 中国资源卫星应用中心 | System for directly performing quick-look display on 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 |
| CN115344397A (en) * | 2022-10-20 | 2022-11-15 | 中科星图测控技术(合肥)有限公司 | Real-time target area rapid screening processing method |
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