CN104157014A - Method and system for correcting contour lines - Google Patents
Method and system for correcting contour lines Download PDFInfo
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- CN104157014A CN104157014A CN201410378283.3A CN201410378283A CN104157014A CN 104157014 A CN104157014 A CN 104157014A CN 201410378283 A CN201410378283 A CN 201410378283A CN 104157014 A CN104157014 A CN 104157014A
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Abstract
The invention provides a method for correcting contour lines. The contour lines are selected in a batch and systematic manner for correction; compared with manual selection and correction of contour lines one by one, the efficiency and accuracy are improved greatly, the operation steps are simple, the application is convenient and fast and the time for three-dimensional acquisition and graphics edition is greatly saved.
Description
Technical field
The present invention relates to digital image processing field, particularly a kind of system of revising isocontour method and using the method.
Background technology
When photogrammetric office work gathers level line, often the misoperation due to instrument or software causes height value wrong, as it is inaccurate to generate isocontour height value, or height value assignment mistake etc.The method of existing conventional modification height value has: (1) utilizes looking into that acquisition software carries to change function, only has at present the three-dimensional acquisition software of minority main flow to carry level line and looks into and change function, as the MapMatrix of space flight distant view.On current mapping market, the most frequently used version is MapMatrix4.0, and its level line looks into that to change function more single, and without 3-D view, level line comparatively dense or wrongly process when more slowly, mostly need to look into and change manually, and efficiency is lower.MapMatrix latest edition is 4.1, and its level line function of quality control strengthens to some extent, and as increased 3-D view function, but each functional module does not become system, is difficult to smoothness and completes efficiently level line and look into and change.Virtuozo and JX4 are not all with level line to look into change function.(2), by other business softwares, as southern Cass and GeoWay, but this class software needs softdog conventionally, expensive, because these business softwares are not for processing level line specialized designs, therefore operation is comparatively loaded down with trivial details when this mode is revised level line, efficiency is not high.(3), by additive method, as spatial analysis etc., these are that to look into figure easy mostly, change inconvenience.
Summary of the invention
The present invention is intended at least solve one of technical matters existing in prior art.For this reason, the present invention proposes a kind of isocontour method of correction, and system in bulk level line picked out and modified is selected level line and the mode of modifying has improved efficiency and accuracy rate greatly compared with an artificial rule; And operation steps is simple, be easy to use quick, greatly saved the time of three-dimensional collection and graphics edition.
In order to realize above-mentioned technique effect, concrete technical scheme is:
Revise an isocontour method, comprise the steps: level line horizontalization, each level line is as the criterion with its first node elevation value, give the height value that other nodes are identical, make the height value of all nodes on each level line consistent; Mistake level line is searched, and standard contour interval H is set, and according to the numerical relation of isocontour height value S and described standard contour interval H, wrong level line is picked out and described wrong level line is indicated; The level line that corrects mistakes, is revised as correct height value by the isocontour first node elevation value of described mistake, to having revised the wrong level line of first node elevation value, carries out horizontalization again, makes all nodes on it have correct height value.
As such scheme preferably, before level line horizontalization step, also comprise line style conversion, level line is converted to 3D multi-section-line.
As such scheme preferably, in wrong level line finding step, described numerical relation is specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When described isocontour height value becomes other numerical relation with described standard contour interval, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4.
As such scheme preferably, to described error curve, adopt the color that is different from described intermediate contour, index contour, half interval contour to indicate.
As such scheme preferably, described error curve be yellow, described intermediate contour be white, described index contour is redness, described half interval contour is brown.
The present invention also provides a kind of correction isocontour system, comprising: horizontalization module, for each level line is as the criterion with its first node elevation value, give the height value that other nodes are identical, and make the height value of all nodes on each level line consistent; Search module, for standard contour interval H is set, according to the numerical relation of the isocontour height value S of reality and described standard contour interval, wrong level line is picked out and described wrong level line is indicated; Correcting module, for the isocontour first node elevation value of described mistake is revised as to correct height value, carries out horizontalization again to having revised the wrong level line of first node elevation value, makes all nodes on it have correct height value.This system can realize and isocontourly search and revise by the isocontour method of above-mentioned correction.
As such scheme preferably, also comprise line style modular converter, for level line being converted to discernible line style.
As such scheme preferably, described in search module and comprise taxon and indicate unit, described taxon is sorted out level line according to described numerical relation, is specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When described isocontour height value becomes other numerical relation with described standard contour interval, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4; Described sign unit is for adopting different colors that described error curve and described intermediate contour, index contour, half interval contour are distinguished.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of the embodiment mono-of the isocontour method of correction provided by the invention;
Fig. 2 is the flow chart of steps of the embodiment bis-of the isocontour method of correction provided by the invention;
Fig. 3 selects wrong isocontour idiographic flow in wrong level line finding step;
Fig. 4 is the block diagram of the embodiment mono-of the isocontour system of correction provided by the invention;
Fig. 5 is the block diagram of the embodiment bis-of the isocontour system of correction provided by the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, orientation or the position relationship of the indications such as term " " center ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, so can not be interpreted as limitation of the present invention.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
As shown in Figure 1, the invention provides a kind of isocontour method of correction, comprise the steps:
(1) level line horizontalization, is as the criterion each level line with its first node elevation value, give the height value that other nodes are identical, makes the height value of all nodes on each level line consistent;
(2) mistake level line is searched, and standard contour interval H is set, and according to the numerical relation of isocontour height value S and described standard contour interval H, wrong level line is picked out and described wrong level line is indicated; Described numerical relation is specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When isocontour height value equidistantly becomes other numerical relations with described standard, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4, described error curve is denoted as to yellow simultaneously, and described intermediate contour is denoted as to white, described index contour is denoted as to redness, described half interval contour is denoted as brown; This step has realized by level line automatic clustering and by wrong level line and having indicated, easy-to-look-up, has greatly shortened wrong isocontour searching the time;
(3) level line that corrects mistakes, by being denoted as the isocontour first node elevation value of yellow mistake, be revised as correct height value, now level line is sorted out again, check and whether also have yellow wrong level line, if also there is yellow wrong level line, the yellow mistake level line still existing is carried out to horizontalization again, make all nodes on it there is correct height value; In this step, adjust after wrong isocontour first node elevation value, by again level line being sorted out, check and whether also have yellow wrong level line, if also exist yellow wrong level line only need to carry out again horizontalization to wrong level line, whole level line horizontalizations, this step has also been saved the time of revising isocontour height value.
According to the isocontour method of a kind of correction provided by the invention, first all level lines are carried out to horizontalization, then all level lines classified and indicate wrong level line, again the isocontour first node elevation value of mistake is modified, amended level line is checked, if inerrancy level line completes whole isocontour modifications; If also exist wrong level line to carry out again horizontalization to revising the level line of first node elevation value, systematically complete and isocontourly search and revise, effectively improved to look into and changed isocontour efficiency.
As shown in Figure 3, show and in wrong level line finding step, specifically select wrong isocontour process flow diagram, first by isocontour height value divided by standard contour interval, the level line of aliquot standard contour interval is divided into first kind level line, and the level line of aliquant standard contour interval is divided into Equations of The Second Kind level line; First kind level line, again divided by 5, if first kind level line can be divided exactly by 5, is classified as to index contour, if first kind level line can not be divided exactly by 5, classify as intermediate contour; Standard contour interval by Equations of The Second Kind level line divided by 0.5 times, if Equations of The Second Kind level line can be divided exactly by 0.5 times of standard contour interval, classifies as half interval contour, if Equations of The Second Kind level line can not be divided exactly by 0.5 times of standard contour interval, classifies as error curve.
The one group of level line of take is example, shown in key diagram 3, selects wrong isocontour flow process, is provided with one group of level line, and height value is respectively 2,4,6,8,9,10,12,14,16,18,20,21,21.5, standard contour interval is 2, and the select flow process of wrong level line in this group is as follows:
1, by all level line height value divided by standard contour interval 2, this group level line can be divided into two groups, be respectively first kind level line and Equations of The Second Kind level line.The isocontour height value of the first kind comprises 2,4,6,8,10,12,14,16,18,20, the isocontour height value of the first kind all can be divided exactly by standard contour interval 2, the isocontour height value of Equations of The Second Kind comprises 9,21,21.5, and the isocontour height value of Equations of The Second Kind all can not be divided exactly by 2;
2, by the isocontour height value of the first kind respectively divided by 5, equal 0 divided by 5 as 2, remainder is 2, and for example 18 equal 3 divided by 5, remainder is 3, and 2 and 18 all can not be divided exactly by 5, can not be divided exactly and remainder is that 1 or 2 or 3 or 4 first kind level line is classified as intermediate contour by 5; And for example 10 equal 2 divided by 5, can be classified as index contour by 5 first kind level lines of dividing exactly.By the isocontour height value of the first kind, divided by after 5, the isocontour height value that classifies as intermediate contour comprises 2,4,6,8,12,14,16,18, and the isocontour height value that classifies as index contour comprises 10,20;
3, the standard contour interval divided by 0.5 times by the isocontour height value of Equations of The Second Kind, 1, Equations of The Second Kind level line is divided into again two groups: can be classified as half interval contour by the 1 Equations of The Second Kind level line of dividing exactly, the isocontour height value that classifies as half interval contour comprises 9,21, can not be classified as error curve by the 1 Equations of The Second Kind level line of dividing exactly, the isocontour height value that classifies as error curve comprises 21.5.
Further, as shown in Figure 2, if original level line is not 3D multi-section-line, before level line horizontalization step, also comprise line style conversion, level line is converted to 3D multi-section-line.When being 3D multi-section-line, level line could carry out horizontalization to it.
As shown in Figure 3, the present invention also provides a kind of correction isocontour system, comprising:
Horizontalization module, for each level line is as the criterion with its first node elevation value, gives the height value that other nodes are identical, makes the height value of all nodes on each level line consistent;
Search module, for standard contour interval H is set, according to the numerical relation of isocontour height value S and described standard contour interval H, wrong level line is picked out and described wrong level line is indicated; The described module of searching comprises taxon and sign unit, and described taxon is sorted out level line according to described numerical relation, is specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When described isocontour height value equidistantly becomes other numerical relations with described standard, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4; Described sign unit is for adopting different colors that described error curve and described intermediate contour, index contour, half interval contour are distinguished, in the present embodiment, described error curve can be denoted as to yellow, described intermediate contour is denoted as to white, described index contour is denoted as to redness, described half interval contour is denoted as brown;
Correcting module, for the isocontour first node elevation value of described mistake is revised as to correct height value, to carry out checking and whether also having error curve after layering to level line again, if do not exist, complete isocontour correction, if also there is error curve, to having revised the wrong level line of first node elevation value, carry out again horizontalization, make all nodes on it there is correct height value.
System shown in Fig. 3 can be with the correction of Fig. 1 isocontour method realize and isocontourly search and revise.
As shown in Figure 4, the method that the system that the present embodiment provides provides with Fig. 2 is corresponding, also comprises line style modular converter, for level line being converted to discernible line style.When original level line is not 3D multi-line section, before level line horizontalization, first converts original level line to 3D multi-section-line, then carry out transposition and put down.After completing isocontour correction, can also convert the level line of 3D multi-section-line formula to other needed line style, such as straight line, 2D multi-line section etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (8)
1. revise an isocontour method, it is characterized in that, comprise the steps:
Level line horizontalization, is as the criterion each level line with its first node elevation value, give the height value that other nodes are identical, makes the height value of all nodes on each level line consistent;
Mistake level line is searched, and standard contour interval H is set, and according to the numerical relation of isocontour height value S and described standard contour interval H, wrong level line is picked out and described wrong level line is indicated;
The level line that corrects mistakes, is revised as correct height value by the isocontour first node elevation value of described mistake, to having revised the wrong level line of first node elevation value, carries out horizontalization again, makes all nodes on it have correct height value.
2. the isocontour method of correction according to claim 1, is characterized in that, also comprises line style conversion before level line horizontalization step, and level line is converted to 3D multi-section-line.
3. the isocontour method of correction according to claim 1 and 2, is characterized in that, in wrong level line finding step, described numerical relation is specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When described isocontour height value becomes other numerical relation with described standard contour interval, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4.
4. the isocontour method of correction according to claim 3, is characterized in that, to described error curve, adopts the color that is different from described intermediate contour, index contour, half interval contour to indicate.
5. the isocontour method of correction according to claim 4, is characterized in that, described error curve is yellow, and described intermediate contour is white, and described index contour is red, and described half interval contour is brown.
6. revise an isocontour system, it is characterized in that, comprising:
Horizontalization module, for each level line is as the criterion with its first node elevation value, gives the height value that other nodes are identical, makes the height value of all nodes on each level line consistent;
Search module, for standard contour interval H is set, according to the numerical relation of isocontour height value S and described standard contour interval, wrong level line is picked out and described wrong level line is indicated;
Correcting module, for the isocontour first node elevation value of described mistake is revised as to correct height value, carries out horizontalization again to having revised the wrong level line of first node elevation value, makes all nodes on it have correct height value.
7. the isocontour system of correction according to claim 6, is characterized in that, also comprises line style modular converter, for level line being converted to discernible line style.
8. according to the isocontour system of the correction described in claim 6 or 7, it is characterized in that, the described module of searching comprises taxon and indicates unit, described taxon is sorted out level line according to described numerical relation, be specially: when S=(5N+M) * H, described level line is classified as to intermediate contour; When S=5N*H, described level line is classified as to index contour; When S=N*0.5H and S ≠ N*H, described level line is classified as to half interval contour; When described isocontour height value becomes other numerical relation with described standard contour interval, described level line is classified as to error curve, wherein, N is natural number, M is any integer in 1,2,3,4; Described sign unit is for adopting different colors that described error curve and described intermediate contour, index contour, half interval contour are distinguished.
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Cited By (3)
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| CN110489511A (en) * | 2019-08-23 | 2019-11-22 | 西南大学 | Contour edge fit elevation error correcting method, system and electronic equipment and medium |
| CN111813885A (en) * | 2020-07-09 | 2020-10-23 | 四川五维地理信息技术有限公司 | Method and device for detecting contour line elevation value of topographic map with basic scale |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109377854A (en) * | 2018-09-14 | 2019-02-22 | 北京金双狐油气技术有限公司 | The isopleth title operation method and device of geologic structure diagram |
| CN110489511A (en) * | 2019-08-23 | 2019-11-22 | 西南大学 | Contour edge fit elevation error correcting method, system and electronic equipment and medium |
| CN110489511B (en) * | 2019-08-23 | 2021-07-30 | 西南大学 | Contour line edge-contact elevation error correction method and system, electronic device and medium |
| CN111813885A (en) * | 2020-07-09 | 2020-10-23 | 四川五维地理信息技术有限公司 | Method and device for detecting contour line elevation value of topographic map with basic scale |
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