CN108090217A - A kind of method and system that meteorological grating image is converted to WMS figure layers - Google Patents
A kind of method and system that meteorological grating image is converted to WMS figure layers Download PDFInfo
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- CN108090217A CN108090217A CN201711483300.XA CN201711483300A CN108090217A CN 108090217 A CN108090217 A CN 108090217A CN 201711483300 A CN201711483300 A CN 201711483300A CN 108090217 A CN108090217 A CN 108090217A
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- 238000012217 deletion Methods 0.000 claims description 3
- 230000037430 deletion Effects 0.000 claims description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/04—Context-preserving transformations, e.g. by using an importance map
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
- G06F16/56—Information retrieval; Database structures therefor; File system structures therefor of still image data having vectorial format
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Abstract
The present invention relates to a kind of method and system that meteorological grating image is converted to WMS figure layers, wherein method includes:Meteorological grating image is converted into vector image;Vector image is write into database, generates WMS figure layers;Online editing is carried out to WMS figure layers.Meteorological grating image is converted by vector image by the present invention and is then issued as WMS figure layers, realizes the online editing to meteorological image.
Description
Technical field
The present invention relates to technical field of image processing, and in particular to a kind of that meteorological grating image is converted to WMS figure layers
Method and system.
Background technology
Since web occur since, computer picture just plays an important role wherein, it may be said that be exactly by
In the appearance of the multimedia elements such as various images and audio visual, people's note that just bringing up greatly are attracted
The prosperity of internet today.The image used on web can be divided into two kinds of grating image and vector image.At present absolutely mostly
Several web graph pictures is grating image, such as:GIF, JPEG and PNG etc..
Grating image is to describe image with bitmap dot matrix, and this method has some limitations:First, grating image
Must information including each point show the image, therefore image file is all bigger and be unfavorable for network under normal conditions
Transmission.Secondly, grating image does not have " intelligent ", themselves " can not carry " information that can be searched.In addition, grid
Image can not carry out direct editing, and stretching is carried out in the case of can not or else losing data, so as to influence its resolution ratio and
Color.The characteristics of grating image, causes it that can not well be interacted with user, comprising information content it is seldom.For complexity
Expressive ability of the map on web is extremely limited.
And the RELEASE PROBLEM of meteorological image is directed to, since the image of meteorological remote sensing system acquisition is often grating image, by
In the grating image itself the characteristics of, when Weather Forecast Information occur and going wrong with actual remote sensing weather information, for meteorology
The modification of image is very unfavorable with issuing.
The content of the invention
The present invention is provided and a kind of meteorological grating image is converted to WMS figures for technical problem in the prior art
The method of layer, is converted into vector image by meteorological grating image and is then issued as WMS figure layers, realize the online volume to meteorological image
Volume.
The technical solution that the present invention solves above-mentioned technical problem is as follows:It is a kind of that meteorological grating image is converted into WMS figure layers
Method, comprise the following steps:
Step 1, meteorological grating image is converted into vector image;
Step 2, vector image is write into database, generates WMS figure layers;
Step 3, online editing is carried out to WMS figure layers.
Further, the step 1 includes:
Step 101, binary conversion treatment is carried out to meteorological grating image, obtains the corresponding two-value of the meteorological grating image
Figure extracts the border in the different characteristic region of the meteorological grating image;
Step 102, frontier tracing is carried out to the meteorological grating image, it is from node that the meteorological grating image, which is arranged,
The line segment or closure lines to set out, and stored with approach vector;
Step 103, in the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;
Step 104, the spatial relationship between segmental arc and polygon is judged, to form complete topological structure and foundation and attribute
The relation of data.
Further, the step 101, including:
Since raster data is expressed by 0~255 different gray values, in order to simplify track algorithm, it is necessary to by 256
2 grayscale of grayscale boil down to, i.e., 0 and 1 two-stage, it is assumed that the gray value of arbitrary grid is G (i, j), threshold value T, then under
The meteorological grating image is carried out binary conversion treatment and obtains the corresponding binary map of the meteorological grating image by formula, and according to described
The border of the binary map extraction meteorological grating image;Aforesaid operations are repeated, are obtained successively different in the meteorological grating image
The border of characteristic area,
Further, further included after the step 101:" layer stripping " is utilized to different characteristic in the meteorological grating image
The boundary line in region carries out micronization processes.
Further, in the step 102, when carrying out frontier tracing to the meteorological grating image, searched according to default
Since Suo Fangxiang originating grid, scan for eight neighborhoods of Searching point in the case of guarantee trend, chooses ash successively
The identical consecutive points of grade are spent for next Searching point, obtain the segmental arc being made of all Searching points or polygon.
Further, the step 103 includes:
Since search is that grid carries out one by one, so the data point for forming the segmental arc or polygon is very intensive, it is
Reduction amount of storage, partial data point is deleted in the case where ensureing line segment precision, and deletion rule is as follows:
For three consecutive number strong points A, B, C in segmental arc or polygon a direction, the angle of line segment BA, BC are calculated,
If the angle is more than predetermined angle threshold value, and distance is less than pre-determined distance threshold value between AC, then deletes B points, otherwise retain B
Point, and round and smooth processing is carried out according to described search direction to AC line segments.
Further, the step 2 includes:
The vector data is included to the map datum of Vector Message according to the generation of geographical spatial positional information;
The map datum is carried out according to the boundary information of vector data to render processing, generates WMS figure layers.
The present invention also provides a kind of system that meteorological grating image is converted to WMS figure layers, including
Format converting module, for meteorological grating image to be converted into vector image;
Figure layer generation module for vector image to be write database, generates WMS figure layers;
Online editing module, for carrying out online editing to WMS figure layers.
Further, the format converting module is specifically used for:
Binary conversion treatment is carried out to meteorological grating image, the corresponding binary map of the meteorological grating image is obtained, extracts institute
State the border in the different characteristic region of meteorological grating image;
Frontier tracing is carried out to the meteorological grating image, is the line from node by the meteorological grating image arrangement
Section is closed lines, and is stored with approach vector;
In the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;
The spatial relationship between segmental arc and polygon is judged, to form complete topological structure and establish the pass with attribute data
System.
The beneficial effects of the invention are as follows:By the invention it is possible to meteorological grating image is converted into vector image and then is sent out
Cloth is WMS figure layers, realizes the online editing to meteorological image.
Description of the drawings
Fig. 1 is a kind of method flow diagram that meteorological grating image is converted to WMS figure layers provided by the invention;
Fig. 2 is a kind of system construction drawing that meteorological grating image is converted to WMS figure layers provided by the invention.
Specific embodiment
The principle of the present invention and feature are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Fig. 1 is a kind of method flow diagram that meteorological grating image is converted to WMS figure layers provided by the invention, such as Fig. 1 institutes
Show, a kind of method that meteorological grating image is converted to WMS figure layers comprises the following steps:
Step 1, meteorological grating image is converted into vector image;
Step 2, vector image is write into database, generates WMS figure layers;
Step 3, online editing is carried out to WMS figure layers.
Further, the step 1 includes:
Step 101, binary conversion treatment is carried out to meteorological grating image, obtains the corresponding two-value of the meteorological grating image
Figure extracts the border in the different characteristic region of the meteorological grating image;
Step 102, frontier tracing is carried out to the meteorological grating image, it is from node that the meteorological grating image, which is arranged,
The line segment or closure lines to set out, and stored with approach vector;
Step 103, in the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;
Step 104, the spatial relationship between segmental arc and polygon is judged, to form complete topological structure and foundation and attribute
The relation of data.
Further, the step 101, including:
Since raster data is expressed by 0~255 different gray values, in order to simplify track algorithm, it is necessary to by 256
2 grayscale of grayscale boil down to, i.e., 0 and 1 two-stage, it is assumed that the gray value of arbitrary grid is G (i, j), threshold value T, then under
The meteorological grating image is carried out binary conversion treatment and obtains the corresponding binary map of the meteorological grating image by formula, and according to described
The border of the binary map extraction meteorological grating image;Aforesaid operations are repeated, are obtained successively different in the meteorological grating image
The border of characteristic area,
Further, further included after the step 101:" layer stripping " is utilized to different characteristic in the meteorological grating image
The boundary line in region carries out micronization processes.
Further, in the step 102, when carrying out frontier tracing to the meteorological grating image, searched according to default
Since Suo Fangxiang originating grid, scan for eight neighborhoods of Searching point in the case of guarantee trend, chooses ash successively
The identical consecutive points of grade are spent for next Searching point, obtain the segmental arc being made of all Searching points or polygon.
Further, the step 103 includes:
Since search is that grid carries out one by one, so the data point for forming the segmental arc or polygon is very intensive, it is
Reduction amount of storage, partial data point is deleted in the case where ensureing line segment precision, and deletion rule is as follows:
For three consecutive number strong points A, B, C in segmental arc or polygon a direction, the angle of line segment BA, BC are calculated,
If the angle is more than predetermined angle threshold value, and distance is less than pre-determined distance threshold value between AC, then deletes B points, otherwise retain B
Point, and round and smooth processing is carried out according to described search direction to AC line segments.
Further, the step 2 includes:
The vector data is included to the map datum of Vector Message according to the generation of geographical spatial positional information;
The map datum is carried out according to the boundary information of vector data to render processing, generates WMS figure layers.
The present invention also provides a kind of system that meteorological grating image is converted to WMS figure layers, as shown in Fig. 2, including
Format converting module, for meteorological grating image to be converted into vector image;
Figure layer generation module for vector image to be write database, generates WMS figure layers;
Online editing module, for carrying out online editing to WMS figure layers.
Further, the format converting module is specifically used for:
Binary conversion treatment is carried out to meteorological grating image, the corresponding binary map of the meteorological grating image is obtained, extracts institute
State the border in the different characteristic region of meteorological grating image;
Frontier tracing is carried out to the meteorological grating image, is the line from node by the meteorological grating image arrangement
Section is closed lines, and is stored with approach vector;
In the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;
The spatial relationship between segmental arc and polygon is judged, to form complete topological structure and establish the pass with attribute data
System.
By the invention it is possible to then meteorological grating image is converted into vector image is issued as WMS figure layers, realize to gas
As the online editing of image.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (9)
- A kind of 1. method that meteorological grating image is converted to WMS figure layers, which is characterized in that comprise the following steps:Step 1, meteorological grating image is converted into vector image;Step 2, vector image is write into database, generates WMS figure layers;Step 3, online editing is carried out to WMS figure layers.
- 2. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 1, which is characterized in that described Step 1 includes:Step 101, binary conversion treatment is carried out to meteorological grating image, obtains the corresponding binary map of the meteorological grating image, carry Take the border in the different characteristic region of the meteorological grating image;Step 102, frontier tracing is carried out to the meteorological grating image, it is from node that the meteorological grating image, which is arranged, Line segment or be closed lines, and stored with approach vector;Step 103, in the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;Step 104, the spatial relationship between segmental arc and polygon is judged, to form complete topological structure and foundation and attribute data Relation.
- 3. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 2, which is characterized in that described Step 101, including:Since raster data is expressed by 0~255 different gray values, in order to simplify track algorithm, it is necessary to by 256 grayscale 2 grayscale of boil down to, i.e., 0 and 1 two-stage, it is assumed that the gray value of arbitrary grid is G (i, j), threshold value T, then according to the following formula will The meteorology grating image carries out binary conversion treatment and obtains the corresponding binary map of the meteorological grating image, and according to the two-value The border of the figure extraction meteorological grating image;Aforesaid operations are repeated, obtain different characteristic in the meteorological grating image successively The border in region<mrow> <mi>G</mi> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mrow> <mi>G</mi> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>&GreaterEqual;</mo> <mi>T</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mrow> <mi>G</mi> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>&le;</mo> <mi>T</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>.</mo> </mrow>
- 4. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 3, which is characterized in that in institute It is further included after stating step 101:The boundary line in different characteristic region in the meteorological grating image is carried out using " layer stripping " thin Change is handled.
- 5. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 2, which is characterized in that described In step 102, when carrying out frontier tracing to the meteorological grating image, according to the default direction of search, opened from starting grid Begin, eight neighborhoods of Searching point are scanned in the case of guarantee trend, choosing the identical consecutive points of gray level successively is Next Searching point obtains the segmental arc being made of all Searching points or polygon.
- 6. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 5, which is characterized in that described Step 103 includes:Since search is that grid carries out one by one, so the data point for forming the segmental arc or polygon is very intensive, in order to subtract Few amount of storage, partial data point is deleted in the case where ensureing line segment precision, and deletion rule is as follows:For three consecutive number strong points A, B, C in segmental arc or polygon a direction, the angle of line segment BA, BC are calculated, if The angle is more than predetermined angle threshold value, and distance is less than pre-determined distance threshold value between AC, then deletes B points, otherwise retains B points, And round and smooth processing is carried out according to described search direction to AC line segments.
- 7. a kind of method that meteorological grating image is converted to WMS figure layers according to claim 5, which is characterized in that described Step 2 includes:The vector data is included to the map datum of Vector Message according to the generation of geographical spatial positional information;The map datum is carried out according to the boundary information of vector data to render processing, generates WMS figure layers.
- 8. a kind of system that meteorological grating image is converted to WMS figure layers, which is characterized in that includingFormat converting module, for meteorological grating image to be converted into vector image;Figure layer generation module for vector image to be write database, generates WMS figure layers;Online editing module, for carrying out online editing to WMS figure layers.
- 9. a kind of system that meteorological grating image is converted to WMS figure layers according to claim 8, which is characterized in that described Format converting module is specifically used for:Binary conversion treatment is carried out to meteorological grating image, the corresponding binary map of the meteorological grating image is obtained, extracts the gas As the border in the different characteristic region of grating image;Frontier tracing is carried out to the meteorological grating image, the meteorological grating image is arranged be from the line segment of node or Lines are closed, and are stored with approach vector;In the case where ensureing line segment precision, extra data point is deleted, and does the round and smooth processing of curve;The spatial relationship between segmental arc and polygon is judged, to form complete topological structure and establish the relation with attribute data.
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CN112417080A (en) * | 2020-12-11 | 2021-02-26 | 南京信息工程大学 | Elastic design method of meteorological grid |
CN112698666A (en) * | 2021-03-24 | 2021-04-23 | 南京信息工程大学 | Aircraft route optimization method based on meteorological grid |
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