CN104796620A - Rapid and precise camera monitoring method based on GIS (geographic information system) - Google Patents
Rapid and precise camera monitoring method based on GIS (geographic information system) Download PDFInfo
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- CN104796620A CN104796620A CN201510258632.2A CN201510258632A CN104796620A CN 104796620 A CN104796620 A CN 104796620A CN 201510258632 A CN201510258632 A CN 201510258632A CN 104796620 A CN104796620 A CN 104796620A
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Abstract
The invention discloses a rapid and precise camera monitoring method based on a GIS (geographic information system). The rapid and precise monitoring method is characterized by comprising the following steps: demarcating camera information; demarcating a reference line; plotting camera view fields on the GIS; setting target elevation; obtaining target coordinates from GIS; scanning and searching the camera; judging whether console control exists or not, executing the next process, otherwise, scheduling videos, and ending operation; calculating a horizontal rotary angle; calculating a horizontal rotation step value; calculating a pitching rotation angle; generating a control instruction; and completing precise positioning control, scheduling videos and ending operation. The rapid and precise monitoring method disclosed by the invention can be used for realizing quick calling and precise positioning for the camera in a large-scale and superlarge-scale video intensive monitoring process, so that a user can accurately complete tracking and monitoring of movement targets in real time during large-scale and superlarge-scale video intensive monitoring, and the monitored target is difficult to escape from the monitored videos.
Description
Technical field
The present invention relates to the fields such as camera pan-tilt control, GIS geographic information processing, the demarcation of camera field of view scope, in particular to a kind of video camera fast accurate method for supervising based on GIS technology.
Background technology
More and more extensive along with the extensive video surveillance applications of City-level, each Surveillance center concentrated needs the video camera controlled to get more and more.In order to can initiatively in good time accurately monitoring the site of the accident, people have employed a large amount of video cameras and monitor; The rotation of The Cloud Terrace is also utilized to carry out approaching accurate monitoring to control camera alignment monitoring objective.Due to video camera Numerous, monitor staff is difficult to determine that video camera is the best CCTV camera of current goal, if monopod video camera is more difficult to judge that current camera needs thataway to rotate how many degree and accurately could monitor target in time.Due to above reason, the video camera not with The Cloud Terrace often can only be used in actual monitored to carry out directed monitoring and the video of video cameras all around target is all shown or used the video camera of band The Cloud Terrace to move at a slow speed or the target of not movement is cruised supervisions, corresponding camera views can not be retrieved for examination for target and more be difficult to make full use of the rotating characteristic of monopod video camera and realize moving target real-time and precise, dynamically tracing and monitoring.
Current extensive video monitoring generally can only utilize the video camera being in the same localities and disposing towards all directions for the target in motion, rely on the geography between camera field of view scope to cover and covered location possible for target comprehensively.During monitoring, monitor staff needs camera number and their the monitoring visual field of clearly knowing each position.Target needs the video camera of retrieving for examination next control point fast after moving out this camera supervised scope.Need operator on duty very familiar to the landform of whole guarded region like this when ultra-large video monitoring is implemented in place with a varied topography, also want the monitoring range can accurately remembering each video camera, increase the weight of the burden of video monitoring personnel, if simultaneously target speed reaches certain degree or monitoring scale reaches certain quantity; The phenomenon that BREAK TRACK occurs will be easy to.What this made video monitoring in most of the cases can only control instrument or static object as the situation of large area scene approaches watch-dog, is difficult to carry out the individual target in motion dynamic in real time with control accurately.
Summary of the invention
The object of the invention is to the above problem overcoming prior art existence, a kind of video camera fast accurate method for supervising based on GIS technology is provided, realize under complex-terrain environment, tracing and monitoring accurately can be carried out in real time to operating target fast and accurately when not needing monitor staff to be familiar with landform and video camera deployment scenario and camera field of view, target is allowed to be difficult to monitoring range of escaping out, thus promote the large-scale application of video monitoring and expand its applied business scope, reduce the working strength of video monitoring personnel, promote its monitoring efficiency.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
Based on a video camera fast accurate method for supervising for GIS technology, it is characterized in that, comprise the following steps:
Step 1) calibrating camera information;
Step 2) demarcate reference line;
Step 3) GIS marks and draws camera field of view;
Step 4) Offered target elevation;
Step 5) obtains coordinates of targets from GIS;
Step 6) traversal searches video camera;
Step 7) determines whether cradle head control, is, enters next step, otherwise schedule video, terminate to run;
Step 8) calculated level rotational angle;
Step 9) calculated level rotates step value;
Step 10) calculates pitch rotation angle;
Step 11) generates control command;
Step 12) completes precise positioning and controls, schedule video, terminates to run.
Further, described step 6 traversal is searched video camera and is comprised: in GIS map, click target location, the operation function utilizing GIS to carry travels through all camera field of view scopes, find out the management object that visual field covers all video cameras of this point, relevant video camera attribute is obtained by reading these object's property values, according to the category attribute in video camera attribute, these video cameras are divided into fixed cameras and monopod video camera, trigonometric function relation is utilized to calculate and rotate deflection angle between initial position co-ordinates line more further to monopod video camera wherein, utilize GIS map amount to calculate function and calculate space clear distance between target and video camera, trigonometric function relation is utilized to calculate luffing angle by video camera and target depth displacement with net level length between the two, then use the computing formula of video camera rotational angle and actuating quantity to calculate the actuating quantity accurately of each video camera, obtain the accurate control information of each video camera.
Preferably, described computing formula comprises:
1) The Cloud Terrace horizontally rotates between step number linear relative to the rotational angle of initial rotation datum level and The Cloud Terrace
DeflectionAngle * ScalingFactor=StepNumber (formula 1)
Wherein: DeflectionAngle: the deflection angle of the relative initial rotation position line in target location,
ScalingFactor: the scale factor between rotational angle and The Cloud Terrace step value,
StepNumber: The Cloud Terrace step value;
2) linear between the rotational angle of The Cloud Terrace Relative vertical head-down position and The Cloud Terrace pitch rotation step number
PitchAngle * ScalingFactor=StepNumber (formula 2)
Wherein: PitchAngle: the camera supervised deflection angle to relative vertical position line during target utilizing trigonometric function relation to calculate,
ScalingFactor: the scale factor between pitch rotation angle and The Cloud Terrace step value,
StepNumber: The Cloud Terrace step value;
3) video camera quick position monitoring principle is according to the difference on video camera index point on GIS coordinate between video camera Installation Elevation and goal-setting elevation, and the net level length of target range video camera utilizes trigonometric function relation to calculate luffing angle
(formula 3)
Wherein: h: video camera elevation,
H1: goal-setting elevation,
R1: the net level length between target and video camera,
Cot a: the cotangent value of the The Cloud Terrace angle of pitch.
The invention has the beneficial effects as follows:
1, the present invention mainly for retrieve for examination video camera fast under current extensive video monitoring scene and the The Cloud Terrace controlling monopod video camera is precisely monitored time positioning time long, positioning precision is not high, moving target is easily with the technical barrier lost, propose and the solution monitored of a kind of video camera fast accurate based on GIS technology realized, realize extensive, video camera in ultra-large video set in monitor procedure is retrieved for examination fast, accurate location, make user on a large scale, the tracing and monitoring of moving target can be completed in real time accurately during ultra-large video centralized monitor, monitoring objective is allowed to be difficult to escape from monitor video.
2, computer is utilized can be covered the information of all video cameras of current monitor position by GIS technology automatic acquisition field range.And carry out differentiated process according to camera type.For the video camera possessing cradle head control condition, computer is by GIS technology automatic acquisition coordinates of targets, camera coordinates, initial reference line (face), and the location dependent information such as target elevation and video camera elevation.Utilize trigonometric function relation to calculate video camera and accurately will monitor the level and pitch rotation angle that target needs to carry out.Recycling the operational formula be stored in GIS video camera management point calculate cradle head control amount, according to related protocol automatically generate control command be sent to The Cloud Terrace complete video camera fast accurate location.User is without the need to being familiar with the deployment scenario of whole video camera more without the need to understanding the actual landform landforms of guarded region.Be conducive to carrying out large-scale video monitoring deployment, reduce the efficiency of operating personnel's technical threshold and lifting video monitoring.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is video camera fast accurate method for supervising flow chart of the present invention;
Fig. 2 is that cradle head control information calculates schematic diagram.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
With reference to shown in Fig. 1, a kind of video camera fast accurate method for supervising based on GIS technology, is characterized in that, comprise the following steps:
Step 1) calibrating camera information;
Step 2) demarcate reference line;
Step 3) GIS marks and draws camera field of view;
Step 4) Offered target elevation;
Step 5) obtains coordinates of targets from GIS;
Step 6) traversal searches video camera;
Step 7) determines whether cradle head control, is, enters next step, otherwise schedule video, terminate to run;
Step 8) calculated level rotational angle;
Step 9) calculated level rotates step value;
Step 10) calculates pitch rotation angle;
Step 11) generates control command;
Step 12) completes precise positioning and controls, schedule video, terminates to run.
One, the principle of the accurate control information of video camera is obtained by GIS
1, the demarcation of camera icon in GIS layer
Each coordinate points in GIS map layer can be managed independently by as an object.People can compose for this object with different property values, and carry out assignment and reading to these attributes, can also be these object pinup pictures.Utilize this characteristic, we can will need the video camera demarcated to mate with its actual geographical coordinate and whole attribute in GIS map, thus on GIS, complete the video camera layer consistent with actual scene and information demarcation Back ground Informations such as () camera number, IP address, geographical coordinate, elevations.
2, camera field of view scope is demarcated
On GIS, according to the actual monitored scope of each video camera, (video camera of band The Cloud Terrace needs the physical location that each angular field of view in cloud platform rotation process can supervise to do UNICOM's process to mark out corresponding polygon, and form true comprehensively field range figure), as the actual monitored visual field figure of each video camera.
3, cloud platform rotation initial reference face is demarcated
On GIS, for each monopod video camera marks and draws an initial rotation position line, this line is utilized to generate an initial reference face.Field control camera pan-tilt turns to initial rotation position line indicated direction, starts The Cloud Terrace and arranges function, is remembered and demarcates for the origin of coordinates or presetting bit 0. complete cloud platform rotation initial position co-ordinates line.
4, typing cloud platform rotation deflection angle computing formula
On GIS, the computing formula that the management object typing for each monopod video camera generates according to the cloud platform rotation angle of reality and the relation of actuating quantity, realizes the differential management of cradle head control.
5, the accurate control information of target monitoring video camera is obtained
With reference to shown in Fig. 2, GIS map clicks target location, and the operation function utilizing GIS to carry travels through all camera field of view scopes, finds out the management object that visual field covers all video cameras of this point.Relevant video camera attribute is obtained by reading these object's property values.According to the category attribute in video camera attribute, these video cameras are divided into fixed cameras and monopod video camera.Trigonometric function relation is utilized to calculate and rotate deflection angle between initial position co-ordinates line more further to monopod video camera wherein; Utilize GIS map amount to calculate function and calculate space clear distance between target and video camera.Trigonometric function relation is utilized to calculate luffing angle by the net level length between video camera and target depth displacement and 2.Then use the computing formula of video camera rotational angle and actuating quantity to calculate the actuating quantity accurately of each video camera, obtain the accurate control information of each video camera.
1) according to cradle head control principle, The Cloud Terrace horizontally rotates linear between step number (as formula 1) relative to the rotational angle (b) of initial rotation datum level and The Cloud Terrace.
Video camera quick position monitoring principle calculates target location according to GIS coordinate position, angle between camera position and the initial rotation plane of reference (line), utilizing angle and the relation derivation rotated between step number to go out and control step number accurately, is that control command accurately drives The Cloud Terrace to realize precise positioning monitoring by this convert information.
DeflectionAngle * ScalingFactor=StepNumber (formula 1)
Wherein: DeflectionAngle: the deflection angle of the relative initial rotation position line in target location;
ScalingFactor: the scale factor between rotational angle and The Cloud Terrace step value;
StepNumber: The Cloud Terrace step value;
2) according to cradle head control principle, between the rotational angle (a) of The Cloud Terrace Relative vertical head-down position and The Cloud Terrace pitch rotation step number linear (as formula 2).
Video camera quick position monitoring principle is according to video camera Installation Elevation (h) on video camera index point on GIS coordinate and the difference between goal-setting elevation (h1), and the net level length of target range video camera utilizes trigonometric function relation to calculate luffing angle (as formula 3).Then utilizing the functional relation between luffing angle and The Cloud Terrace pitch rotation step number to calculate The Cloud Terrace pitch rotation and control step number, is that control command accurately drives The Cloud Terrace to realize precise positioning monitoring by this convert information.
PitchAngle * ScalingFactor=StepNumber (formula 2)
Wherein: PitchAngle: the camera supervised deflection angle to relative vertical position line during target utilizing trigonometric function relation to calculate;
ScalingFactor: the scale factor between pitch rotation angle and The Cloud Terrace step value;
StepNumber: The Cloud Terrace step value;
(formula 3)
Wherein: h: video camera elevation;
H1: goal-setting elevation;
R1: the net level length between target and video camera;
Cot a: the cotangent value of the The Cloud Terrace angle of pitch.
Two, video camera quick position monitoring
Travel through the video camera of all band The Cloud Terraces, utilize the accurate control information obtained, according to the corresponding control command of cradle head control protocol generation, send these control commands to The Cloud Terrace, drive cloud platform rotation to monitoring position accurately.
Send video dispatching instruction, all camera videos that can monitor this point are dispatched out, realize the monitoring of video camera quick position.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1., based on a video camera fast accurate method for supervising for GIS technology, it is characterized in that, comprise the following steps:
Step 1) calibrating camera information;
Step 2) demarcate reference line;
Step 3) GIS marks and draws camera field of view;
Step 4) Offered target elevation;
Step 5) obtains coordinates of targets from GIS;
Step 6) traversal searches video camera;
Step 7) determines whether cradle head control, is, enters next step, otherwise schedule video, terminate to run;
Step 8) calculated level rotational angle;
Step 9) calculated level rotates step value;
Step 10) calculates pitch rotation angle;
Step 11) generates control command;
Step 12) completes precise positioning and controls, schedule video, terminates to run.
2. video camera fast accurate method for supervising according to claim 1, it is characterized in that, described step 6 traversal is searched video camera and is comprised: in GIS map, click target location, the operation function utilizing GIS to carry travels through all camera field of view scopes, find out the management object that visual field covers all video cameras of this point, relevant video camera attribute is obtained by reading these object's property values, according to the category attribute in video camera attribute, these video cameras are divided into fixed cameras and monopod video camera, trigonometric function relation is utilized to calculate and rotate deflection angle between initial position co-ordinates line more further to monopod video camera wherein, utilize GIS map amount to calculate function and calculate space clear distance between target and video camera, trigonometric function relation is utilized to calculate luffing angle by video camera and target depth displacement with net level length between the two, then use the computing formula of video camera rotational angle and actuating quantity to calculate the actuating quantity accurately of each video camera, obtain the accurate control information of each video camera.
3. video camera fast accurate method for supervising according to claim 2, it is characterized in that, described computing formula comprises:
1) The Cloud Terrace horizontally rotates between step number linear relative to the rotational angle of initial rotation datum level and The Cloud Terrace
DeflectionAngle * ScalingFactor=StepNumber (formula 1)
Wherein: DeflectionAngle: the deflection angle of the relative initial rotation position line in target location,
ScalingFactor: the scale factor between rotational angle and The Cloud Terrace step value,
StepNumber: The Cloud Terrace step value;
2) linear between the rotational angle of The Cloud Terrace Relative vertical head-down position and The Cloud Terrace pitch rotation step number
PitchAngle * ScalingFactor=StepNumber (formula 2)
Wherein: PitchAngle: the camera supervised deflection angle to relative vertical position line during target utilizing trigonometric function relation to calculate,
ScalingFactor: the scale factor between pitch rotation angle and The Cloud Terrace step value,
StepNumber: The Cloud Terrace step value;
3) video camera quick position monitoring principle is according to the difference on video camera index point on GIS coordinate between video camera Installation Elevation and goal-setting elevation, and the net level length of target range video camera utilizes trigonometric function relation to calculate luffing angle
(formula 3)
Wherein: h: video camera elevation,
H1: goal-setting elevation,
R1: the net level length between target and video camera,
Cot a: the cotangent value of the The Cloud Terrace angle of pitch.
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| CN106210643A (en) * | 2016-07-29 | 2016-12-07 | 林玉峰 | A kind of video camera viewing area call method |
| CN106682596A (en) * | 2016-12-14 | 2017-05-17 | 苏州航天系统工程有限公司 | Violation fishing monitoring method based on video image analysis |
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| CN110274612A (en) * | 2019-06-21 | 2019-09-24 | 大庆安瑞达科技开发有限公司 | A kind of pitching of remote optical turntable and orientation calibration method based on ground remote sensing photomap |
| CN110285829A (en) * | 2019-06-21 | 2019-09-27 | 大庆安瑞达科技开发有限公司 | A kind of geographical calibration distance measuring method of single station optical servo monitoring |
| CN110536102A (en) * | 2019-10-12 | 2019-12-03 | 甘肃省测绘工程院 | A kind of emergency command network system |
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| CN113115002A (en) * | 2021-04-13 | 2021-07-13 | 大庆安瑞达科技开发有限公司 | Oil and gas field personnel and vehicle positioning associated video monitoring method |
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| CN110536102A (en) * | 2019-10-12 | 2019-12-03 | 甘肃省测绘工程院 | A kind of emergency command network system |
| CN113115002A (en) * | 2021-04-13 | 2021-07-13 | 大庆安瑞达科技开发有限公司 | Oil and gas field personnel and vehicle positioning associated video monitoring method |
| CN115540876A (en) * | 2022-11-28 | 2022-12-30 | 济南和普威视光电技术有限公司 | Target positioning method combining offline DEM and photoelectric video data |
| CN115540876B (en) * | 2022-11-28 | 2023-04-07 | 济南和普威视光电技术有限公司 | Target positioning method combining offline DEM and photoelectric video data |
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