CN108052923A - Transmission line forest fire synchronous satellite monitoring image treatment method, system and storage medium based on Thiessen polygon - Google Patents
Transmission line forest fire synchronous satellite monitoring image treatment method, system and storage medium based on Thiessen polygon Download PDFInfo
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- CN108052923A CN108052923A CN201711466280.5A CN201711466280A CN108052923A CN 108052923 A CN108052923 A CN 108052923A CN 201711466280 A CN201711466280 A CN 201711466280A CN 108052923 A CN108052923 A CN 108052923A
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- G—PHYSICS
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- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/10—Terrestrial scenes
- G06V20/13—Satellite images
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/20—Finite element generation, e.g. wire-frame surface description, tesselation
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- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
Abstract
It prevents and reduces natural disasters technical field the present invention relates to power grid, a kind of transmission line forest fire synchronous satellite monitoring image treatment method and system based on Thiessen polygon is disclosed, to improve power grid mountain fire synchronous satellite monitoring image processing efficiency.The method of the present invention includes：It reads and simplifies network simplified positioning grid data in the block in satellite monitoring image file section, obtain latitude and longitude coordinates information of each simplified positioning mesh point in the original spheric coordinate system of satellite monitoring image；By it is adjacent simplify positioning mesh point be sequentially linked to be have it is public while but the triangle that intersects of while not depositing, make the perpendicular bisector on each side of each triangle, obtain the Thiessen polygon surrounded by associated vertical bisector intersection point；Using it is each it is simplified position characteristic point of the mesh point as Thiessen polygon, using Thiessen polygon interpolation calculation each coordinate of the pixel to be asked in the original spheric coordinate system of satellite monitoring image to carry out corresponding synchronous satellite image projecting.
Description
Technical field
It prevents and reduces natural disasters technical field more particularly to a kind of transmission line of electricity mountain based on Thiessen polygon the present invention relates to power grid
Fiery synchronous satellite monitoring image treatment method and system.
Background technology
To realize effective monitoring to transmission line forest fire, various ways have been used at present, including meteorological satellite remote sensing, admittedly
Determine place installation smoke-detecting plant and weather radar monitoring etc..Carrying out mountain fire monitoring using meteorological satellite has monitoring model
The features such as wide, discovery is timely, at low cost is enclosed, has become research hotspot at present.Compared with polar-orbiting satellite, synchronous satellite is located at equator
Overhead, temporal resolution is up to 4 times/hour.Therefore, mountain fire monitoring is carried out using synchronous satellite, power grid mountain fire can be effectively improved
Monitoring time resolution ratio expands monitoring range, has high development prospect.
Satellite image projective iteration is the element task of power grid mountain fire monitoring and warning research.In satellite monitoring image data
In, each infrared picture data section includes segment mark block, infrared picture data block and filler.And in satellite monitoring image file
Duan Zhong comprising status block, constant block, simplifies the data blocks such as network block, spare block.Among these, simplify network simplification in the block to determine
Position grid data is the look-up table of correspondence between image picture elements coordinate and geographical longitude and latitude.By positioning grid number to simplifying
According to interpolation, the geographical longitude and latitude of image picture elements conveniently can be quickly and easily obtained, then realizes the quick throwing of power grid mountain fire monitoring image
Shadow positions.
25 × 25 are provided on observed image using the required positioning grid data that simplifies generally, based on applicant in this case
Image picture elements coordinate line number and row number corresponding to longitude and latitude mesh point, scope are 60 degree of north latitude to 60 degree of south latitude, 45 degree of east longitude
To 165 degree, grid pitch difference is 5 degree.
The content of the invention
Present invention aims at disclose at a kind of transmission line forest fire synchronous satellite monitoring image based on Thiessen polygon
Reason method, system and storage medium, to improve power grid mountain fire synchronous satellite monitoring image processing efficiency.
To achieve the above object, the invention discloses a kind of transmission line forest fire synchronous satellite prisons based on Thiessen polygon
Image treatment method is surveyed, including：
It reads and simplifies network simplified positioning grid data in the block in satellite monitoring image file section, obtain each simplification and determine
Latitude and longitude coordinates information of the position mesh point in the original spheric coordinate system of satellite monitoring image；
By it is adjacent simplify positioning mesh point be sequentially linked to be have it is public while but the triangle that intersects of while not depositing, make each triangle
The perpendicular bisector on each side obtains the Thiessen polygon surrounded by associated vertical bisector intersection point；
It is each using Thiessen polygon interpolation calculation using each simplified positioning mesh point as the characteristic point of Thiessen polygon
Coordinate of the pixel to be asked in the original spheric coordinate system of satellite monitoring image is to carry out corresponding synchronous satellite image projecting；Its
In, when it is the pixel outside the public side of Thiessen polygon and public vertex to seek pixel, calculation formula is：
F (x, y)=μ × f (xo,yo)
In above-mentioned formula, f (xi,yi) for Thiessen polygon characteristic point coordinate value, μ is weight coefficient, f (xo,yo) treated for distance
The nearest Thiessen polygon feature point coordinates of interpolation point, f (x1,y1) it is the Thiessen polygon characteristic point near apart from interpolation point time
Coordinate, d [f (xo,yo), f (x, y)] for interpolation point and the Thiessen polygon characteristic point space spherical distance away from its nearest neighbours, d
[f(x1,y1), f (x, y)] for interpolation point and apart from the secondary near Thiessen polygon characteristic point space spherical distance of interpolation point；
When wait pixel is asked to fall when on the public vertex of Thiessen polygon or public side, the coordinate of pixel to be asked calculates public affairs
Formula is：
In above-mentioned formula, n is the Thiessen polygon quantity comprising public side or public vertex；f(xk,yk) public for k-th
Characteristic point treats the contribution margin of interpolation point in Thiessen polygon；
Wherein, when pixel to be asked and at least two Thiessen polygon characteristic points apart from equal and distance be it is nearest,
Then judge that the pixel to be asked falls on the public side of Thiessen polygon or public vertex；And above-mentioned " nearest ", " secondary near " are near
Like the calculating conducted in the Thiessen polygon of plane.
Optionally, the calculation formula of above-mentioned space spherical distance is：
In above-mentioned formula, R0For earth mean radius；Subscript rad represents degree being converted to arc pattern.
In order to achieve the above object, invention additionally discloses a kind of transmission line forest fire synchronous satellite monitorings based on Thiessen polygon
Image processing system including memory, processor and stores the computer journey that can be run on a memory and on a processor
The step of sequence, the processor realizes the above method when performing the computer program.
In order to achieve the above object, invention additionally discloses a kind of computer readable storage mediums, computer program is stored thereon with,
The step of above method is realized when described program is executed by processor.
The invention has the advantages that：
In view of simplifying grid adjacent and irregular plane quadrilateral at 4 points, the present invention proposes a kind of polygon based on Tyson
The synchronous satellite monitoring image interpolation localization method of shape, several subregions are divided by monitoring image according to the position of characteristic point,
Feature per sub-regions is represented by Thiessen polygon, avoids the projection occurred during the scrambling because simplifying positioning grid regions inclined
Difference greatly improves system treatment effeciency, can be calculated for mountain fire monitoring and warning and provide support.
Below with reference to accompanying drawings, the present invention is described in further detail.
Description of the drawings
The attached drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is Thiessen polygon structure schematic diagram disclosed by the embodiments of the present invention；
Fig. 2 monitors image mountain fire identifying result figure for synchronous satellite.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Embodiment 1
The present embodiment discloses a kind of transmission line forest fire synchronous satellite monitoring image treatment method based on Thiessen polygon,
Including：
Step S1, read in satellite monitoring image file section and simplify network simplified positioning grid data in the block, obtain every
Latitude and longitude coordinates information of a simplified positioning mesh point in the original spheric coordinate system of satellite monitoring image.
In this step, it is as shown in table 1 to simplify positioning grid data：
Step S2, by it is adjacent simplify positioning mesh point be sequentially linked to be have it is public while but the triangle that intersects of while not depositing, work
The perpendicular bisector on each each side of triangle, obtains the Thiessen polygon surrounded by associated vertical bisector intersection point.
In this step, the structure of Thiessen polygon is as shown in phantom in fig. 1.
Step S3, using each simplified mesh point that positions as the characteristic point of Thiessen polygon, Thiessen polygon interpolation is utilized
Each coordinate of the pixel to be asked in the original spheric coordinate system of satellite monitoring image is calculated to carry out corresponding synchronous satellite shadow
As projection.
In this step, when wait ask pixel for pixel outside the public side of Thiessen polygon and public vertex when, meter
Calculating formula is：
F (x, y)=μ × f (xo,yo)
In above-mentioned formula, f (xi,yi) for Thiessen polygon characteristic point coordinate value, μ is weight coefficient, f (xo,yo) treated for distance
The nearest Thiessen polygon feature point coordinates of interpolation point, f (x1,y1) it is the Thiessen polygon characteristic point near apart from interpolation point time
Coordinate, d [f (xo,yo), f (x, y)] for interpolation point and the Thiessen polygon characteristic point space spherical distance away from its nearest neighbours, d
[f(x1,y1), f (x, y)] for interpolation point and apart from the secondary near Thiessen polygon characteristic point space spherical distance of interpolation point.
When wait pixel is asked to fall when on the public vertex of Thiessen polygon or public side, the coordinate of pixel to be asked calculates public affairs
Formula is：
In above-mentioned formula, n is the Thiessen polygon quantity comprising public side or public vertex；f(xk,yk) public for k-th
Characteristic point treats the contribution margin of interpolation point in Thiessen polygon.
In the present embodiment, when pixel to be asked and at least two Thiessen polygon characteristic points apart from equal and distance are most
Near, then judge that the pixel to be asked falls on the public side of Thiessen polygon or public vertex；And above-mentioned " nearest ", " secondary near " are
Calculating conducted in the Thiessen polygon of almost plane.
Optionally, the calculation formula of above-mentioned space spherical distance is：
In above-mentioned formula, R0For earth mean radius；Subscript rad represents degree being converted to arc pattern.
Image processing is monitored based on the above-mentioned transmission line forest fire synchronous satellite based on Thiessen polygon of the present embodiment, with
The blue vigorous top grade angular projection synchronous satellite infrared channel cloud atlas of double normal lines, selects the partial-block striograph in Hunan region to be thrown
Shadow applied analysis, and infrared in extraction accordingly and far infrared passage data, then carry out at enhancing the block plan of each passage
Reason, and different colours are assigned, forest fire and tower spotting are carried out afterwards.Fig. 2 monitors image mountain fire for synchronous satellite and sentences knowledge knot
Fruit is schemed, and early warning shaft tower is 500kV ancient cooking vessel star II lines 69#.It is determined as mountain fire through the verification of live operation maintenance personnel.
Embodiment 2
In order to achieve the above object, invention additionally discloses a kind of transmission line forest fire synchronous satellite monitorings based on Thiessen polygon
Image processing system including memory, processor and stores the computer journey that can be run on a memory and on a processor
The step of sequence, the processor realizes the above method when performing the computer program.
Embodiment 3
In order to achieve the above object, invention additionally discloses a kind of computer readable storage mediums, computer program is stored thereon with,
The step of above method is realized when described program is executed by processor.
To sum up, the disclosed transmission line forest fire synchronous satellite monitoring based on Thiessen polygon of the various embodiments described above of the present invention
Monitoring image is divided into several subregions by image treatment method, system and storage medium according to the position of characteristic point, per height
The feature in region is represented by Thiessen polygon, avoids the distortion occurred during the scrambling because simplifying positioning grid regions, pole
System treatment effeciency is improved greatly, can be calculated for mountain fire monitoring and warning and support is provided.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
- A kind of 1. transmission line forest fire synchronous satellite monitoring image treatment method based on Thiessen polygon, which is characterized in that bag It includes：It reads and simplifies network simplified positioning grid data in the block in satellite monitoring image file section, obtain each simplified positioning net Latitude and longitude coordinates information of the lattice point in the original spheric coordinate system of satellite monitoring image；By it is adjacent simplify positioning mesh point be sequentially linked to be have it is public while but the triangle that intersects of while not depositing, make each side of each triangle Perpendicular bisector, obtain the Thiessen polygon surrounded by associated vertical bisector intersection point；Using each simplified mesh point that positions as the characteristic point of Thiessen polygon, each wait to ask using Thiessen polygon interpolation calculation Coordinate of the pixel in the original spheric coordinate system of satellite monitoring image is to carry out corresponding synchronous satellite image projecting；Wherein, When it is the pixel outside the public side of Thiessen polygon and public vertex to seek pixel, calculation formula is：F (x, y)=μ × f (xo,yo)<mrow> <mi>&mu;</mi> <mo>=</mo> <mn>1</mn> <mo>-</mo> <mfrac> <mrow> <mi>d</mi> <mo>&lsqb;</mo> <mi>f</mi> <mrow> <mo>(</mo> <mrow> <msub> <mi>x</mi> <mi>o</mi> </msub> <mo>,</mo> <msub> <mi>y</mi> <mi>o</mi> </msub> </mrow> <mo>)</mo> </mrow> <mo>,</mo> <mi>f</mi> <mrow> <mo>(</mo> <mrow> <mi>x</mi> <mo>,</mo> <mi>y</mi> </mrow> <mo>)</mo> </mrow> <mo>&rsqb;</mo> </mrow> <mrow> <mi>d</mi> <mo>&lsqb;</mo> <mi>f</mi> <mrow> <mo>(</mo> <mrow> <mi>x</mi> <mo>,</mo> <mi>y</mi> </mrow> <mo>)</mo> </mrow> <mo>,</mo> <mi>f</mi> <mrow> <mo>(</mo> <mrow> <mi>x</mi> <mo>,</mo> <mi>y</mi> </mrow> <mo>)</mo> </mrow> <mo>&rsqb;</mo> </mrow> </mfrac> </mrow>In above-mentioned formula, f (xi,yi) for Thiessen polygon characteristic point coordinate value, μ is weight coefficient, f (xo,yo) it is apart from interpolation The nearest Thiessen polygon feature point coordinates of point, f (x1,y1) it is the Thiessen polygon feature point coordinates near apart from interpolation point time, d[f(xo,yo), f (x, y)] for interpolation point and the Thiessen polygon characteristic point space spherical distance away from its nearest neighbours, d [f (x1, y1), f (x, y)] for interpolation point and apart from the secondary near Thiessen polygon characteristic point space spherical distance of interpolation point；When wait pixel is asked to fall when on the public vertex of Thiessen polygon or public side, the coordinate calculation formula of pixel to be asked For：<mrow> <mi>f</mi> <mrow> <mo>(</mo> <mi>x</mi> <mo>,</mo> <mi>y</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mn>1</mn> <mi>n</mi> </mfrac> <mo>&times;</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>n</mi> </munderover> <mi>f</mi> <mrow> <mo>(</mo> <msub> <mi>x</mi> <mi>k</mi> </msub> <mo>,</mo> <msub> <mi>y</mi> <mi>k</mi> </msub> <mo>)</mo> </mrow> </mrow>In above-mentioned formula, n is the Thiessen polygon quantity comprising public side or public vertex；f(xk,yk) it is k-th of public Tyson Characteristic point treats the contribution margin of interpolation point in polygon；Wherein, when pixel to be asked and at least two Thiessen polygon characteristic points apart from equal and distance are nearest, then sentence The fixed pixel to be asked falls on the public side of Thiessen polygon or public vertex；And above-mentioned " nearest ", " secondary near " are flat in approximation Calculating conducted in the Thiessen polygon in face.
- 2. the transmission line forest fire synchronous satellite monitoring image processing side according to claim 1 based on Thiessen polygon Method, which is characterized in that the calculation formula of space spherical distance is：<mfenced open = "" close = ""> <mtable> <mtr> <mtd> <mrow> <mi>d</mi> <mo>&lsqb;</mo> <mi>f</mi> <mrow> <mo>(</mo> <msub> <mi>x</mi> <mi>o</mi> </msub> <mo>,</mo> <msub> <mi>y</mi> <mi>o</mi> </msub> <mo>)</mo> </mrow> <mo>,</mo> <mi>f</mi> <mo>(</mo> <mrow> <mi>x</mi> <mo>,</mo> <mi>y</mi> </mrow> <mo>)</mo> <mo>&rsqb;</mo> <mo>=</mo> <msub> <mi>R</mi> <mn>0</mn> </msub> <mo>&times;</mo> <mi>arccos</mi> <mo>(</mo> <mi>sin</mi> <mo>(</mo> <msubsup> <mi>x</mi> <mn>0</mn> <mrow> <mi>r</mi> <mi>a</mi> <mi>d</mi> </mrow> </msubsup> <mo>)</mo> <mi>sin</mi> <mo>(</mo> <msup> <mi>x</mi> <mrow> <mi>r</mi> <mi>a</mi> <mi>d</mi> </mrow> </msup> <mo>)</mo> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>+</mo> <mi>cos</mi> <mo>(</mo> <msubsup> <mi>x</mi> <mn>0</mn> <mrow> <mi>r</mi> <mi>a</mi> <mi>d</mi> </mrow> </msubsup> <mo>)</mo> <mi>cos</mi> <mo>(</mo> <msup> <mi>x</mi> <mrow> <mi>r</mi> <mi>a</mi> <mi>d</mi> </mrow> </msup> <mo>)</mo> <mi>cos</mi> <msup> <mrow> <mo>(</mo> <mrow> <msub> <mi>y</mi> <mn>0</mn> </msub> <mo>-</mo> <mi>y</mi> </mrow> <mo>)</mo> </mrow> <mrow> <mi>r</mi> <mi>a</mi> <mi>d</mi> </mrow> </msup> <mo>)</mo> </mrow> </mtd> </mtr> </mtable> </mfenced>In above-mentioned formula, R0For earth mean radius；Subscript rad represents degree being converted to arc pattern.
- A kind of 3. transmission line forest fire synchronous satellite monitoring image processing system based on Thiessen polygon, which is characterized in that bag The computer program that includes memory, processor and storage on a memory and can run on a processor, which is characterized in that institute State the step of realizing the claims 1 or 2 the method when processor performs the computer program.
- 4. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is by processor The step of the claims 1 or 2 the method are realized during execution.
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| CN114092547A (en) * | 2021-11-26 | 2022-02-25 | 国网四川省电力公司达州供电公司 | Fireproof equipment positioning method and device based on satellite picture technology |
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