CN104111485A - Stereo imaging based observation method for raindrop size distribution and other rainfall micro physical characteristics - Google Patents
Stereo imaging based observation method for raindrop size distribution and other rainfall micro physical characteristics Download PDFInfo
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- CN104111485A CN104111485A CN201410345881.0A CN201410345881A CN104111485A CN 104111485 A CN104111485 A CN 104111485A CN 201410345881 A CN201410345881 A CN 201410345881A CN 104111485 A CN104111485 A CN 104111485A
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Abstract
The invention discloses a stereo imaging based observation method for a raindrop size distribution and other rainfall micro physical characteristics. According to the stereo imaging based observation method for the raindrop size distribution and other rainfall micro physical characteristics, naturally falling raindrops in an observation area are imaged through at least two cameras, three-dimensional reconstruction of the raindrop images are achieved through image matching, and information such as raindrop size, shape, direction, inclination angle and size distribution are obtained from the raindrop three-dimensional images. The stereo imaging based observation method for the raindrop size distribution obtains raindrop three-dimensional shape and distribution conditions in fixed space size through the stereo imaging method, meanwhile multiple rainfall micro physical characteristics such as the raindrop size distribution, the raindrop speed and the raindrop direction are obtained meanwhile, the operation is simple, and the measurement is accurate.
Description
Technical field
Field is calculated in the observation that the present invention relates to natural precipitation, relates in particular to the observation procedure of a kind of raindrop size distribution based on three-dimensional imaging and other precipitation Microphysical Characteristics.
Background technology
Raindrop size distribution is that the quantity of all size raindrop in unit volume is with the distribution of its diameter.Precipitation is in close relations as a kind of weather phenomenon and people's productive life.In recent years, the fields such as meteorological observation, artificial image weather, environmental protection are more and more higher to requiring to raindrop size distribution observation, not only the accuracy of observation of raindrop size distribution required further to improve, and the Microscopic Indexes such as raindrop speed, direction, shape have also been proposed to observation requirements.Traditional raindrop size distribution observation procedure, as the methods such as laser method, mottling method, flour ball method, photographic process are difficult to meet high precision, the many index observation of more current fields to raindrop size distribution.
The common observation procedure of raindrop size distribution is to use photodiode, CCD or other lighting apparatus to carry out imaging or acquisition of signal to the raindrop of natural falling state, adopts the laser raindrop spectrograph device of similar approach to be widely used.The drawback of these class methods is to obtain the information such as movement velocity, direction of raindrop, cannot describe the microscopic characteristics such as raindrop comprehensively.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, and the observation procedure of a kind of raindrop size distribution based on three-dimensional imaging and other precipitation Microphysical Characteristics is provided.
The present invention is achieved by the following technical solutions:
The observation procedure of a kind of raindrop size distribution based on three-dimensional imaging and other precipitation Microphysical Characteristics, by two or more area array cameras, under the lighting condition of normal bright or stroboscopic, the raindrop of natural falling state in localized area are carried out to imaging, the some frame two dimensional images that two or more cameras obtained by the method for images match or spatial mappings convert 3-D view to, and the conversion coefficient that is multiplied by image coordinate system and world coordinate system by calculating the pixel dimension of raindrop in 3-D view obtains the yardstick of raindrop; By calculating the shape facility of raindrop based on border and the shape facility based on region in 3-D view, or the combination of two kinds of features draws the shape of raindrop; By continuous multiple frames raindrop image, use image tracking method to be described the track of raindrop, from movement locus, obtain speed, direction and the pitch angle of raindrop; By yardstick and the observation area volume of raindrop calculating, in unit of account volume the quantity of all size raindrop with the distribution of its diameter, thereby obtain raindrop size distribution parameter.
Described two or more cameras are area array cameras, at an angle or have certain space displacement between camera, to be angle or relative displacement be to require concrete setting according to the images match in three-dimensional imaging, the adoptable camera lens of area array cameras comprises telecentric lens, telephoto lens, Zoom lens.
Described normal bright lighting condition refers to that use luminophor throws light on to observation area, and in observation process, luminophor continues luminous; Described stroboscopic illumination condition refers to and uses the luminophor with stroboscopic function to throw light on to observation area, luminophor strobe light emission in observation process.
Described localized area refers to the hemi-closure space that uses the upper end open that water proof material makes, and upper end open is raindrop acquisition window, and raindrop fall into image acquisition region from raindrop acquisition window.
Advantage of the present invention is: the present invention adopts stereoscopic imaging method, obtain raindrop three-dimensional configuration and distribution situation in fixed space volume, can obtain the multiple precipitation Microphysical Characteristics such as raindrop size distribution, raindrop speed, raindrop direction simultaneously, simple to operate, measure accurately.
Brief description of the drawings
Fig. 1 is principle of work block diagram of the present invention.
Fig. 2 is embodiment of the present invention structural drawing.
Embodiment
As shown in Figure 1, the observation procedure of a kind of raindrop size distribution based on three-dimensional imaging and other precipitation Microphysical Characteristics, by two or more area array cameras, under the lighting condition of normal bright or stroboscopic, the raindrop of natural falling state in localized area are carried out to imaging, the some frame two dimensional images that two or more cameras obtained by the method for images match or spatial mappings convert 3-D view to, and the conversion coefficient that is multiplied by image coordinate system and world coordinate system by calculating the pixel dimension of raindrop in 3-D view obtains the yardstick of raindrop; By calculating the shape facility of raindrop based on border and the shape facility based on region in 3-D view, or the combination of two kinds of features draws the shape of raindrop; By continuous multiple frames raindrop image, use image tracking method to be described the track of raindrop, from movement locus, obtain speed, direction and the pitch angle of raindrop; By yardstick and the observation area volume of raindrop calculating, in unit of account volume the quantity of all size raindrop with the distribution of its diameter, thereby obtain raindrop size distribution parameter.
Described two or more cameras are area array cameras, at an angle or have certain space displacement between camera, to be angle or relative displacement be to require concrete setting according to the images match in three-dimensional imaging, the adoptable camera lens of area array cameras comprises telecentric lens, telephoto lens, Zoom lens.
Described normal bright lighting condition refers to that use luminophor throws light on to observation area, and in observation process, luminophor continues luminous; Described stroboscopic illumination condition refers to and uses the luminophor with stroboscopic function to throw light on to observation area, luminophor strobe light emission in observation process.
Described localized area refers to the hemi-closure space that uses the upper end open that water proof material makes, and upper end open is raindrop acquisition window, and raindrop fall into image acquisition region from raindrop acquisition window.
Embodiment: as shown in Figure 2, two area array cameras 1 are in same level, and imaging crossed axis angle is 90 degree, on the opposite of two area array cameras 1, lighting source 4 is set respectively, adopts telecentric lens as imaging optical path.The raindrop 3 that fall into acquisition window 2 fall into imaging viewing field, and two orthogonal cameras synchronously carry out imaging to raindrop from both direction, and image is sent to computing machine, and two dimensional image is converted to 3-D view by computing machine, have realized obtaining of raindrop 3-D views.By image analysis algorithm, the three-dimensional image sequence that continuous shooting is formed is analyzed, in conjunction with space measurement technology and motion tracking technology, yardstick, movement velocity and direction to raindrop are carried out quantitative test, therefrom measure raindrop size distribution information and other precipitation Microphysical Characteristics.
Claims (4)
1. the observation procedure of the raindrop size distribution based on three-dimensional imaging and other precipitation Microphysical Characteristics, it is characterized in that: by two or more area array cameras, under the lighting condition of normal bright or stroboscopic, the raindrop of natural falling state in localized area are carried out to imaging, the some frame two dimensional images that two or more cameras obtained by the method for images match or spatial mappings convert 3-D view to, and the conversion coefficient that is multiplied by image coordinate system and world coordinate system by calculating the pixel dimension of raindrop in 3-D view obtains the yardstick of raindrop; By calculating the shape facility of raindrop based on border and the shape facility based on region in 3-D view, or the combination of two kinds of features draws the shape of raindrop; By continuous multiple frames raindrop image, use image tracking method to be described the track of raindrop, from movement locus, obtain speed, direction and the pitch angle of raindrop; By yardstick and the observation area volume of raindrop calculating, in unit of account volume the quantity of all size raindrop with the distribution of its diameter, thereby obtain raindrop size distribution parameter.
2. the observation procedure of the raindrop size distribution based on three-dimensional imaging according to claim 1 and other precipitation Microphysical Characteristics, it is characterized in that: described two or more cameras are area array cameras, at an angle or have certain space displacement between camera, to be angle or relative displacement be to require concrete setting according to the images match in three-dimensional imaging, the adoptable camera lens of area array cameras comprises telecentric lens, telephoto lens, Zoom lens.
3. the observation procedure of the raindrop size distribution based on three-dimensional imaging according to claim 1 and other precipitation Microphysical Characteristics, it is characterized in that: described normal bright lighting condition refers to that use luminophor throws light on to observation area, and in observation process, luminophor continues luminous; Described stroboscopic illumination condition refers to and uses the luminophor with stroboscopic function to throw light on to observation area, luminophor strobe light emission in observation process.
4. the observation procedure of the raindrop size distribution based on three-dimensional imaging according to claim 1 and other precipitation Microphysical Characteristics, it is characterized in that: described localized area refers to the hemi-closure space that uses the upper end open that water proof material makes, upper end open is raindrop acquisition window, and raindrop fall into image acquisition region from raindrop acquisition window.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091796A (en) * | 2015-08-24 | 2015-11-25 | 西安电子科技大学 | Raindrop spectrograph and method for measuring a raindrop tilt angle |
| CN106767559A (en) * | 2016-11-14 | 2017-05-31 | 中北大学 | It is a kind of to test the Stereo Vision that primary and secondary flying object sheds area |
| CN106770038A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on laser refraction principle |
| CN106772700A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN106770055A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on laser reflection principle |
| CN106872406A (en) * | 2017-02-21 | 2017-06-20 | 中国水利水电科学研究院 | Regional Rainfall uniformity measuring system and method based on digital image processing techniques |
| CN107015293A (en) * | 2017-02-21 | 2017-08-04 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method |
| CN108227044A (en) * | 2018-01-26 | 2018-06-29 | 中国科学院大气物理研究所 | A kind of raindrop measuring device and method based on twin-line array |
| CN108489547A (en) * | 2018-04-09 | 2018-09-04 | 湖南农业大学 | A kind of raindrop parameter test device |
| CN109307645A (en) * | 2017-07-26 | 2019-02-05 | 四川西物激光技术有限公司 | A kind of three-dimensional imaging laser raindrop spectrograph |
| CN110018529A (en) * | 2019-02-22 | 2019-07-16 | 南方科技大学 | Rainfall measurement method, device, computer equipment and storage medium |
| CN111727383A (en) * | 2019-01-18 | 2020-09-29 | 深圳市大疆创新科技有限公司 | Rainfall measurement method, detection device and readable storage medium |
| CN113762122A (en) * | 2021-08-31 | 2021-12-07 | 中船重工鹏力（南京）大气海洋信息系统有限公司 | Raindrop detection algorithm based on stroboscopic photograph |
| US11828905B2 (en) | 2018-01-26 | 2023-11-28 | Institute Of Atmospheric Physics, Chinese Academy Of Sciences | Dual line diode array device and measurement method and measurement device for particle velocity |
| CN117148477A (en) * | 2023-09-05 | 2023-12-01 | 中国人民解放军国防科技大学 | Precipitation particle multi-angle stereoscopic imaging measurement device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070146705A1 (en) * | 2005-12-13 | 2007-06-28 | Sick Maihak Gmbh | Scattered light range of view measurement apparatus |
| CN102183801A (en) * | 2011-03-18 | 2011-09-14 | 中国气象科学研究院 | System for automatically observing precipitation phenomenon based on digital shooting |
| CN103439756A (en) * | 2013-07-31 | 2013-12-11 | 中国人民解放军理工大学 | Natural precipitation particle micro physical characteristic measuring method based on particle forming speed measurement |
| CN203504692U (en) * | 2013-10-25 | 2014-03-26 | 北京尚水信息技术股份有限公司 | Watercourse surface flow velocity measuring device |
-
2014
- 2014-07-18 CN CN201410345881.0A patent/CN104111485A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070146705A1 (en) * | 2005-12-13 | 2007-06-28 | Sick Maihak Gmbh | Scattered light range of view measurement apparatus |
| CN102183801A (en) * | 2011-03-18 | 2011-09-14 | 中国气象科学研究院 | System for automatically observing precipitation phenomenon based on digital shooting |
| CN103439756A (en) * | 2013-07-31 | 2013-12-11 | 中国人民解放军理工大学 | Natural precipitation particle micro physical characteristic measuring method based on particle forming speed measurement |
| CN203504692U (en) * | 2013-10-25 | 2014-03-26 | 北京尚水信息技术股份有限公司 | Watercourse surface flow velocity measuring device |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091796B (en) * | 2015-08-24 | 2017-07-07 | 西安电子科技大学 | Raindrop spectrometer and the measuring method at raindrop inclination angle |
| CN105091796A (en) * | 2015-08-24 | 2015-11-25 | 西安电子科技大学 | Raindrop spectrograph and method for measuring a raindrop tilt angle |
| CN106767559A (en) * | 2016-11-14 | 2017-05-31 | 中北大学 | It is a kind of to test the Stereo Vision that primary and secondary flying object sheds area |
| CN107015293B (en) * | 2017-02-21 | 2019-08-23 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method |
| CN106770055A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on laser reflection principle |
| CN106872406A (en) * | 2017-02-21 | 2017-06-20 | 中国水利水电科学研究院 | Regional Rainfall uniformity measuring system and method based on digital image processing techniques |
| CN106772700A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN107015293A (en) * | 2017-02-21 | 2017-08-04 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method |
| CN106872406B (en) * | 2017-02-21 | 2023-12-19 | 中国水利水电科学研究院 | Regional rainfall uniformity measuring system and method based on digital image processing technology |
| CN106770055B (en) * | 2017-02-21 | 2023-09-08 | 中国水利水电科学研究院 | Regional rainfall uniformity measuring system and method based on laser reflection principle |
| CN106772700B (en) * | 2017-02-21 | 2023-12-19 | 中国水利水电科学研究院 | Regional rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN106770038B (en) * | 2017-02-21 | 2024-02-02 | 中国水利水电科学研究院 | Regional rainfall uniformity measuring system and method based on laser refraction principle |
| CN106770038A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on laser refraction principle |
| CN109307645A (en) * | 2017-07-26 | 2019-02-05 | 四川西物激光技术有限公司 | A kind of three-dimensional imaging laser raindrop spectrograph |
| CN108227044B (en) * | 2018-01-26 | 2020-03-27 | 中国科学院大气物理研究所 | Raindrop measuring device and method based on double-linear array |
| CN108227044A (en) * | 2018-01-26 | 2018-06-29 | 中国科学院大气物理研究所 | A kind of raindrop measuring device and method based on twin-line array |
| US11828905B2 (en) | 2018-01-26 | 2023-11-28 | Institute Of Atmospheric Physics, Chinese Academy Of Sciences | Dual line diode array device and measurement method and measurement device for particle velocity |
| CN108489547B (en) * | 2018-04-09 | 2024-05-07 | 湖南农业大学 | Raindrop parameter testing device |
| CN108489547A (en) * | 2018-04-09 | 2018-09-04 | 湖南农业大学 | A kind of raindrop parameter test device |
| CN111727383A (en) * | 2019-01-18 | 2020-09-29 | 深圳市大疆创新科技有限公司 | Rainfall measurement method, detection device and readable storage medium |
| CN110018529A (en) * | 2019-02-22 | 2019-07-16 | 南方科技大学 | Rainfall measurement method, device, computer equipment and storage medium |
| CN113762122B (en) * | 2021-08-31 | 2023-10-13 | 中船鹏力(南京)大气海洋信息系统有限公司 | Raindrop detection algorithm based on stroboscopic photo |
| CN113762122A (en) * | 2021-08-31 | 2021-12-07 | 中船重工鹏力（南京）大气海洋信息系统有限公司 | Raindrop detection algorithm based on stroboscopic photograph |
| CN117148477A (en) * | 2023-09-05 | 2023-12-01 | 中国人民解放军国防科技大学 | Precipitation particle multi-angle stereoscopic imaging measurement device and method |
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