CN103090823A - Method and device for computing area of irregular figure - Google Patents
Method and device for computing area of irregular figure Download PDFInfo
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- CN103090823A CN103090823A CN2013100135409A CN201310013540A CN103090823A CN 103090823 A CN103090823 A CN 103090823A CN 2013100135409 A CN2013100135409 A CN 2013100135409A CN 201310013540 A CN201310013540 A CN 201310013540A CN 103090823 A CN103090823 A CN 103090823A
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Abstract
The invention provides a method and a device for computing the area of an irregular figure. The method comprises the following steps: an image of the irregular figure is collected to obtain a first image; an image of a reference figure is collected to obtain a second image, the area S of the reference figure is known, and the collecting condition of the first image is the same with the collecting condition of the second image; comparing the first image with the second image, the area of the irregular figure A is computed according to the area S of the reference figure. The method and the device for computing the area of the irregular figure are suitable for any irregular figure, the area is convenient and fast to compute in the process, and the computing result is accurate.
Description
Technical field
The area that the present invention relates to figure calculates the field, relates in particular to method and device that a kind of irregular figure area calculates.
Background technology
Automobile window glass defrosting-defogging area, it is the important indicator in the test method of automobile window glass defrosting-defogging system performance, because the formed figure of automobile window glass defrosting-defogging scope is irregular figure, calculates described irregular graphics area according to the method for routine and have difficulty.
Only provide " and describing or the demist area profile diagram of taking pictures " in GB11555-2009 " performance of automobile window glass defrosting-defogging system and test method ", do not provide concrete method.Existing to describing or the most modes of estimation that adopt of area computation method of the demist area profile diagram of taking pictures are carried out, there is very large error in this estimation algorithm, can not finely reflect the quality of automobile window glass defrosting-defogging system performance, also just can not reflect to a certain extent the quality of automotive performance, thereby make automobile lose the market competitiveness.
Along with the develop rapidly of computing machine and digital technology, according to working experience, adopt a kind of photography with digital camera of utilizing computing machine and digital camera, calculate fast and accurately the area of this class irregular figure of automobile window glass defrosting-defogging profile diagram.
Summary of the invention
Problem to be solved by this invention is to provide a kind of method and apparatus that quick and precisely calculates the area of this class irregular figure of automobile window glass defrosting-defogging profile diagram, the method and apparatus of described area is not only applicable to this irregular figure of automobile window glass defrosting-defogging profile diagram, but also is applicable to all irregular figures that other can collect image.
In order to solve the problems of the technologies described above, the invention provides a kind of method that irregular figure area calculates, it is characterized in that, comprise the following steps:
Gather the image of irregular figure, obtain the first image;
Gather an image with reference to figure, obtain the second image, wherein said area S with reference to figure is known, and described the first image is identical with the acquisition condition of described the second image;
Described the first image and described the second image are compared, according to the described area A of calculating described irregular figure with reference to the area S of figure.
Gathering described image with reference to figure, after obtaining the step of described the second image, further comprising the steps of:
Calculate the pixel N of described the first image
1
Calculate the pixel N of described the second image
2
The concrete mode of calculating the area A of described irregular figure according to described area S with reference to figure is:
Pixel N with described the first image
1Pixel N with described the second image
2Compare, and according to the pixel N of described the first image
1Pixel N with described the second image
2Between proportionate relationship and utilize with formula according to described area S with reference to figure
Calculate the area A of described irregular figure.
Described acquisition condition is identical to be comprised: gather environmental facies with, sampling instrument is identical, gathers the identical and/or described irregular figure of distance and describedly is placed in same plane with reference to figure.
Preferably, described profile with reference to figure is that circle, triangle, rectangle are wherein a kind of.
The device that a kind of irregular figure area calculates is characterized in that, comprising:
The first image capture module for the image that gathers irregular figure, obtains the first image;
The second image capture module is used for gathering an image with reference to figure, obtains the second image, and wherein said area S with reference to figure is known, and described the first image is identical with the acquisition condition of described the second image;
The area computing module is used for described the first image and described the second image are compared, according to the described area A of calculating described irregular figure with reference to the area S of figure.
Also comprise at the second image capture module:
The first pixel computing module is for the pixel N that calculates described the first image
1
The second pixel computing module is for the pixel N that calculates described the second image
2
The embodiment of described area computing module is:
Pixel N with described the first image
1Pixel N with described the second image
2Compare, and according to the pixel N of described the first image
1Pixel N with described the second image
2Between proportionate relationship and utilize with formula according to described area S with reference to figure
Calculate the area A of described irregular figure.
The invention has the beneficial effects as follows:
The method and apparatus that irregular figure area provided by the present invention calculates all is suitable for any irregular figure, and in the process of the area that calculates irregular figure, not only convenient and swift, and comparison of computational results is accurate.
Description of drawings
Fig. 1 is the method flow diagram that calculates the area of Defroster device for vehicle demist profile diagram in the embodiment of the present invention;
Fig. 2 is the formation picture of device that calculates the area of Defroster device for vehicle demist profile diagram in the embodiment of the present invention.
Embodiment
For computing method and the device of clear statement irregular figure area provided by the present invention, the present invention is described in detail below in conjunction with accompanying drawing, and embodiments of the invention are take the area that calculates automobile window glass defrosting-defogging profile diagram as example.
A kind of method that irregular figure area calculates is characterized in that, comprises the following steps:
Gather the image of irregular figure, obtain the first image;
Gather an image with reference to figure, obtain the second image, wherein said area S with reference to figure is known, and described the first image is identical with the acquisition condition of described the second image;
Described the first image and described the second image are compared, according to the described area A of calculating described irregular figure with reference to the area S of figure.
The core concept of the method that above-mentioned irregular figure area calculates be with described irregular figure and an area S known with reference to figure under identical condition simultaneously shape be converted into the bitmap images that can supply computer program to read in, and calculate the both quantity of shared pixel, according to the proportionate relationship of the shared quantity of pixel both and calculate the area A of described irregular figure according to the area S of reference figure.
The below is described described method with concrete embodiment
Take the area that calculates this irregular figure of Defroster device for vehicle demist profile diagram as example, Fig. 1 is the process flow diagram of the method for the area that calculates Defroster device for vehicle demist profile diagram, with reference to Fig. 1, said method comprising the steps of:
Wherein, before the image that gathers described this irregular figure of automobile window glass defrosting-defogging profile diagram, the method for obtaining described automobile window glass defrosting-defogging profile diagram is as follows:
At first be to choose a transparent clean smooth plastic plate;
Next is described plastic plate to be covered the outside surface of automobile window glass, has the defrosting-defogging profile diagram on described automobile window glass.
At last under on described plastic plate, described defrosting-defogging profile diagram being described.
So just obtained this irregular figure of automobile window glass defrosting-defogging profile diagram, described the first image is the image of automobile window glass defrosting-defogging profile diagram, and the area of described this irregular figure of automobile window glass defrosting-defogging profile diagram is designated as A.
In order to calculate the area S of described standard panel with conventional way, the profile of described standard panel can be wherein a kind of for circle, triangle, rectangle.
Wherein, in the process that gathers described the first image and described the second image, acquisition condition is identical, described acquisition condition is identical to be referred to: described plastic plate with automobile window glass defrosting-defogging profile diagram and described standard panel are placed in equivalent environment, use same sampling instrument, sampling instrument equates and/or plastic plate and standard panel is placed on same plane with the distance between the standard panel with sampling instrument with the distance between plastic plate, gathering simultaneously.
Described sampling instrument mainly refers to a digital camera and annex thereof, digital camera requires performance good, the photo of taking is clear, and want to carry out wide-long shot, also this digital camera to be placed on a support in shooting, can vibration-generating in the process of guaranteeing to take, thus can not affect shooting quality;
Formula (1) is as follows:
Wherein, the principle of formula (1) is: in the situation that the image acquisition condition is identical, the shared area of the pixel of equal number equates.
Be exactly specifically: under identical acquisition condition, the pixel of supposing a certain image is 1 unit, shared real area is S, when the pixel of another image is 2 units so, shared area is exactly 2 times of S, when the pixel of another image was 3 units, shared area was exactly 3 times of S, by that analogy.So in formula (1), N
2Compare N
1Be with reference to the multiple relation between the area A of the area S of figure and irregular figure.
Here it is pointed out that the method for calculating irregular figure area in the embodiment of the present invention is not limited to above-mentioned formula (1), other any methods identical with formula (1) principle all should be thought thought category of the present invention.
The above-mentioned method of utilizing this area S with reference to figure of described standard panel to calculate the area A of described this irregular figure of automobile window glass defrosting-defogging profile diagram, not only be applicable to this irregular figure of automobile window glass defrosting-defogging profile diagram, and other any irregular figures all are suitable for, and computation process is convenient and swift, and result of calculation is accurate.
The device that the present invention also provides a kind of irregular figure area to calculate, take this irregular figure of automobile window glass defrosting-defogging profile diagram as example, Fig. 2 is the pie graph of the device of the present embodiment to described irregular figure equally, with reference to Fig. 2, described device comprises:
The first image capture module 1, described the first image capture module 1 is used for gathering the image of described this irregular figure of automobile window glass defrosting-defogging profile diagram, obtains the first image.
Wherein, before the image that gathers described this irregular figure of automobile window glass defrosting-defogging profile diagram, the method for obtaining described automobile window glass defrosting-defogging profile diagram is as follows:
At first be to choose a transparent clean smooth plastic plate;
Next is described plastic plate to be covered the outside surface of automobile window glass, has the defrosting-defogging profile diagram on described automobile window glass.
At last under on described plastic plate, described defrosting-defogging profile diagram being described.
So just obtained this irregular figure of automobile window glass defrosting-defogging profile diagram, described the first image is the image of automobile window glass defrosting-defogging profile diagram, and the area of described this irregular figure of automobile window glass defrosting-defogging profile diagram is designated as A.
The second image capture module 2, described the second image capture module 2 is used for gathering an image with reference to figure, obtains the second image.Wherein, the area of described standard panel is designated as S, and area S is known.
In order to calculate the area S of described standard panel with conventional way, the profile of described standard panel can be wherein a kind of for circle, triangle, rectangle.
Wherein, in the process that gathers described the first image and described the second image, acquisition condition is identical, described acquisition condition is identical to be referred to: described plastic plate with automobile window glass defrosting-defogging profile diagram and described standard panel are placed in equivalent environment, use same sampling instrument, sampling instrument equates and/or plastic plate and standard panel is placed on same plane with the distance between the standard panel with sampling instrument with the distance between plastic plate, gathering simultaneously.
Described sampling instrument mainly refers to a digital camera and annex thereof, digital camera requires performance good, the photo of taking is clear, and want to carry out wide-long shot, also this digital camera to be placed on a support in shooting, can vibration-generating in the process of guaranteeing to take, thus can not affect shooting quality.
The first pixel computing module 3, described the first pixel computing module 4 is used for calculating the pixel of described the first image, obtains the first pixel N
1
The second pixel computing module 4, the second pixel computing modules 5 are used for calculating the pixel of described the second image, obtain the second pixel N
2
Wherein, the principle of formula (1) is identical with the principle in method, repeats no more here.
When adopting said apparatus to calculate area as this irregular figure of automobile window glass defrosting-defogging profile diagram, be not only applicable to automobile window glass defrosting-defogging profile diagram, and other any irregular figures that can collect image all are suitable for, and computation process is convenient and swift, and result of calculation is accurate.
The above is only the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the method that irregular figure area calculates, is characterized in that, comprises the following steps:
Gather the image of irregular figure, obtain the first image;
Gather an image with reference to figure, obtain the second image, wherein said area S with reference to figure is known, and described the first image is identical with the acquisition condition of described the second image;
Described the first image and described the second image are compared, according to the described area A of calculating described irregular figure with reference to the area S of figure.
2. method according to claim 1, is characterized in that, gathering described image with reference to figure, and is after obtaining the step of described the second image, further comprising the steps of:
Calculate the pixel N of described the first image
1
Calculate the pixel N of described the second image
2
3. method according to claim 2, the concrete mode of calculating the area A of described irregular figure according to described area S with reference to figure is:
Pixel N with described the first image
1Pixel N with described the second image
2Compare, and according to the pixel N of described the first image
1Pixel N with described the second image
2Between proportionate relationship and utilize with formula according to described area S with reference to figure
Calculate the area A of described irregular figure.
4. method according to claim 1, is characterized in that, described acquisition condition is identical to be comprised:
The collection environmental facies with, sampling instrument is identical, gathers the identical and/or described irregular figure of distance and describedly is placed in same plane with reference to figure.
5. method according to claim 1 is characterized in that: described profile with reference to figure is wherein a kind of for circle, triangle, rectangle.
6. the device that irregular figure area calculates, is characterized in that, comprising:
The first image capture module for the image that gathers irregular figure, obtains the first image;
The second image capture module is used for gathering an image with reference to figure, obtains the second image, and wherein said area S with reference to figure is known, and described the first image is identical with the acquisition condition of described the second image;
The area computing module is used for described the first image and described the second image are compared, according to the described area A of calculating described irregular figure with reference to the area S of figure.
7. device according to claim 6, is characterized in that, also comprises at the second image capture module:
The first pixel computing module is for the pixel N that calculates described the first image
1
The second pixel computing module is for the pixel N that calculates described the second image
2
8. device according to claim 7, is characterized in that, the embodiment of described area computing module is:
Pixel N with described the first image
1Pixel N with described the second image
2Compare, and according to the pixel N of described the first image
1Pixel N with described the second image
2Between proportionate relationship and utilize with formula according to described area S with reference to figure
Calculate the area A of described irregular figure.
9. device according to claim 6, is characterized in that, described acquisition condition is identical to be comprised: gather environmental facies with, sampling instrument is identical, gathers the identical and/or described irregular figure of distance and describedly is placed in same plane with reference to figure.
10. device according to claim 5 is characterized in that: described profile with reference to figure is wherein a kind of for circle, triangle, rectangle.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630092A (en) * | 2013-12-17 | 2014-03-12 | 吉林大学 | Automobile orthographic projection area measurement device |
| CN103727904A (en) * | 2013-12-20 | 2014-04-16 | 江苏大学 | Irregular geographic area close shot measurement method based on pixels of non-metric digital camera |
| CN103839284A (en) * | 2014-03-14 | 2014-06-04 | 安凯 | Method for computing target plate perforated area |
| CN106127820A (en) * | 2016-06-30 | 2016-11-16 | 北京合众思壮科技股份有限公司 | The area of a kind of irregular terrain profiles determines method and device |
| CN106248388A (en) * | 2015-06-15 | 2016-12-21 | 福特全球技术公司 | Automatic defrosting and fog removal performance pilot system and method |
| CN106530306A (en) * | 2016-09-28 | 2017-03-22 | 西南石油大学 | Rapid area segmentation method of polygon |
| CN106872181A (en) * | 2017-02-10 | 2017-06-20 | 北京汽车研究总院有限公司 | One kind removes condensate method for testing performance and device |
| CN107977465A (en) * | 2017-12-21 | 2018-05-01 | 福建省晨曦信息科技股份有限公司 | A kind of project cost display methods and terminal |
| CN108151679A (en) * | 2017-12-29 | 2018-06-12 | 深圳市智物联网络有限公司 | A kind of method and system of Land area measure |
| CN108168500A (en) * | 2017-12-21 | 2018-06-15 | 王辉 | A kind of method that irregular figure area is surveyed using 3D printing technique |
| CN108204798A (en) * | 2016-12-16 | 2018-06-26 | 比亚迪股份有限公司 | The test method and device of vehicle defroster demisting area ratio |
| CN109101912A (en) * | 2018-08-01 | 2018-12-28 | 魏丽 | Driving behavior intelligence adjustment system |
| CN110111382A (en) * | 2019-03-21 | 2019-08-09 | 北京弘和中科健康科技发展有限公司 | Irregular area area computation method, device, computer equipment and storage medium |
| CN111256596A (en) * | 2020-02-21 | 2020-06-09 | 北京容联易通信息技术有限公司 | Size measuring method and device based on CV technology, computer equipment and medium |
| CN112802087A (en) * | 2021-02-04 | 2021-05-14 | 上海中通吉网络技术有限公司 | Method and device for detecting overall volume of deposit and electronic equipment |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630092A (en) * | 2013-12-17 | 2014-03-12 | 吉林大学 | Automobile orthographic projection area measurement device |
| CN103630092B (en) * | 2013-12-17 | 2016-07-06 | 吉林大学 | A kind of automobile orthographic projection area measurement device |
| CN103727904A (en) * | 2013-12-20 | 2014-04-16 | 江苏大学 | Irregular geographic area close shot measurement method based on pixels of non-metric digital camera |
| CN103727904B (en) * | 2013-12-20 | 2016-08-24 | 江苏大学 | A kind of irregular region based on non-measuring digital camera pixel area Photogrammetry method |
| CN103839284A (en) * | 2014-03-14 | 2014-06-04 | 安凯 | Method for computing target plate perforated area |
| CN106248388A (en) * | 2015-06-15 | 2016-12-21 | 福特全球技术公司 | Automatic defrosting and fog removal performance pilot system and method |
| CN106127820A (en) * | 2016-06-30 | 2016-11-16 | 北京合众思壮科技股份有限公司 | The area of a kind of irregular terrain profiles determines method and device |
| CN106530306A (en) * | 2016-09-28 | 2017-03-22 | 西南石油大学 | Rapid area segmentation method of polygon |
| CN108204798A (en) * | 2016-12-16 | 2018-06-26 | 比亚迪股份有限公司 | The test method and device of vehicle defroster demisting area ratio |
| CN108204798B (en) * | 2016-12-16 | 2019-10-11 | 比亚迪股份有限公司 | The test method and device of vehicle defroster demisting area ratio |
| CN106872181A (en) * | 2017-02-10 | 2017-06-20 | 北京汽车研究总院有限公司 | One kind removes condensate method for testing performance and device |
| CN107977465A (en) * | 2017-12-21 | 2018-05-01 | 福建省晨曦信息科技股份有限公司 | A kind of project cost display methods and terminal |
| CN108168500A (en) * | 2017-12-21 | 2018-06-15 | 王辉 | A kind of method that irregular figure area is surveyed using 3D printing technique |
| CN108151679A (en) * | 2017-12-29 | 2018-06-12 | 深圳市智物联网络有限公司 | A kind of method and system of Land area measure |
| CN109101912A (en) * | 2018-08-01 | 2018-12-28 | 魏丽 | Driving behavior intelligence adjustment system |
| CN109101912B (en) * | 2018-08-01 | 2019-04-16 | 南京旭羽睿材料科技有限公司 | Driving behavior intelligence adjustment system |
| CN110111382A (en) * | 2019-03-21 | 2019-08-09 | 北京弘和中科健康科技发展有限公司 | Irregular area area computation method, device, computer equipment and storage medium |
| CN111256596A (en) * | 2020-02-21 | 2020-06-09 | 北京容联易通信息技术有限公司 | Size measuring method and device based on CV technology, computer equipment and medium |
| CN112802087A (en) * | 2021-02-04 | 2021-05-14 | 上海中通吉网络技术有限公司 | Method and device for detecting overall volume of deposit and electronic equipment |
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