CN105675549A - Portable crop parameter measurement and growth vigor intelligent analysis device and method - Google Patents
Portable crop parameter measurement and growth vigor intelligent analysis device and method Download PDFInfo
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Abstract
The invention discloses a portable crop parameter measurement and growth vigor intelligent analysis device and method. The device comprises a spectral imaging module, a laser structured light scatter emitter, a binocular photography measurement module, an image acquisition control module, a data acquisition module, a data processing module, a data analysis and application module and a battery module. The device and the method provided by the invention realize fast automatic measurement of a crop canopy structure based on a structured light measurement technology of laser triangulation range-finding principle. A laser single-point light source is converted to a specific form to serve as a light source by an optical splitter to generate evenly spaced point-like projection light sources, and the generated light beams can irradiate a measured surface. When a multispectral image is acquired, the three-dimensional coordinate or spatial form of each light spot or light bar by a photogrammetry technology, and three-dimensional reconstruction of a crop canopy structure can be realized by a spatial interpolation technology.
Description
Technical field
The invention belongs to IT application to agriculture technical field, relate to a kind of crops parameter measurement and growing way analytical equipment and scheme, relate in particular to a kind of Portable rural crop parameter measurement of being combined with high spectrum based on laser and growing way intellectual analysis device and method.
Background technology
In China cultivated land resource day by day reduce, under water resource critical shortage, population constantly expands, demand increases fast, environmental problem becomes increasingly conspicuous overall background, how to ensure agricultural sustainable development and grain security, make farm output and quality and agricultural drop into simultaneous growth, realize the coordinated development target of agricultural year, high-quality, efficient, ecological safety, be China from now on quite over a long time in agricultural must in the face of and the significant problem that solves. Precision agriculture was advocated and has been obtained developing rapidly in International Agriculture field in early 1980s. At present, the U.S. in precision agriculture research and application in leading in the world.
In recent years, domestic a lot of scientific research institutions have also started the research of precision agriculture related fields, but in the theory and practice research of precision agriculture also in the stage at the early-stage. Three basic links of precision agriculture are acquisition of information, decision-making and enforcement, therefore, it is the basis that precision agriculture can be able to smooth decision-making and enforcement that crops ecological environment information is quick and precisely obtained, and is the core component of setting up with in real time, be precisely embodied as the modern agricultural production system of feature. But be that current precision agriculture is able to the Main Bottleneck of implementing smoothly at the immature of technology and method aspect crops ecological environment acquisition of information.
This present invention is devoted to the Modern New technology of crops ecological environment acquisition of information and crop growth monitoring, to promoting the development of domestic precision agriculture to have extremely important impetus.
In current agricultural production, rapid extraction and the analysis of crop information have significant application value, and various crops parameter tacheometer devices are used widely. But current main flow crops parameter measurement instrument is mainly the measurement of crop nutrition content, biochemical parameter, wherein taking chlorophyll meter, leaf area index instrument, optical effect instrument, moisture measurement instrument and plant analyzer as representative. And in agricultural production, the measuring instrument that relates to crops three-dimensional geometry form does not still occur with portable instrument form.
Meanwhile, the observation and analysis of the observation and analysis of three-dimensional geometry morphological data and crop nutrition content and biochemical parameter is difficult to carry out simultaneously, has and important effect and obtain for the analysis of crop information when this two classes parameter.
On the other hand, existing agriculture parameter measurement instrument, mainly from specialty analysis, belongs to the field of agricultural science and technology parameter of specialty relatively, lacks the utilization popularization to common peasant household. Owing to there is no enough professional science and technology knowledge, above-mentioned parameter is difficult to form direct agricultural production motive force.
Address the above problem, must be broken through from technical standpoint, need to give comprehensively with spectrum two alanysis monitoring approach how much, Simultaneous Monitoring simultaneously, this technical bottleneck does not break through current. And, want aspect peasant household to use, need to propose in real time the intelligent monitoring result of Grain Growth Situation, this depends on the basic observation data of utilizing typical crop, form expert Decision-making support system, and this to be single crop parameter measurement instrument field cannot complete.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention is according to the needs of crop growth condition monitoring, the comprehensive utilization reflection characteristic of crops to visible ray and the character of laser structure light, proposed a kind of Portable rural crop parameter measurement of being combined with high spectrum based on laser and growing way intellectual analysis device and method.
A kind of Portable rural crop provided by the invention parameter measurement and growing way intellectual analysis device, is characterized in that: comprise light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis and application module and battery module;
Described light spectrum image-forming module has 6 groups, becomes two rows each 3 layouts, and described light spectrum image-forming module is positioned at the bottom surface central authorities of crust of the device, is horizontally disposed with, when work, place carry crops just above; The photogrammetric module of described binocular is two groups, is arranged in respectively the both sides of described light spectrum image-forming module; The loose point of described laser structure light transmitter is arranged at described light spectrum image-forming module below, and the primary optical axis of 6 camera lenses of described light spectrum image-forming module is consistent with 2 lens directions of the photogrammetric module of described binocular, and primary optical axis is forward parallel; The loose point of described laser structure light transmitter transmit direction is consistent with described light spectrum image-forming module lens direction;
Described imaging acquisition control module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, data acquisition module, data processing module and data analysis respectively;
Described battery module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis respectively, and electric power is provided.
As preferably, described light spectrum image-forming module is made up of Varifocal zoom lens, specific band optical filter and COMS imageing sensor three assemblies, and three assemblies are according to order assembling from top to bottom.
As preferably, described Varifocal zoom lens is the camera lens of constant aperture and burnt long ± 30 ° of angles of visual field, make light spectrum image-forming module 2.5 meters of height can earth observation to the rectangular area of 3*3 rice.
As preferably, between described 6 COMS imageing sensors and corresponding camera lens, configure and contain blue wave band respectively, green wave band, red wave band, red side wave section, the appointment bandpass filter of infrared band, 2 COMS imageing sensors of the photogrammetric module of binocular are unworthy of optical filter.
As preferably, described imaging acquisition control module also disposes GPS module, 3G/WIFI module and touch screen module, for installing output and input message.
A kind of Portable rural crop provided by the invention parameter measurement and growing way intelligent analysis method, is characterized in that, comprises the following steps:
Step 1: corps canopy three-dimensional reconstruction, its specific implementation comprises following sub-step:
Step 1.1: the structured light form of the photogrammetric measurement of corps canopy binocular is adjusted; The parameter that described structured light form comprises laser frequency and two aspects of beam shape;
Step 1.2: structured light photogrammetric calibration, comprises that camera calibration and projector demarcate two steps; Described camera calibration adopts photogrammetric bundle adjustment technology to obtain to comprise lens distortion, interior foreign side is that element is at interior high-precision camera parameter; The calibration of described projector be by structured light projection to the demarcation thing of known form, by camera filmed image, the demarcation that the inverse process by principle of triangulation can implementation structure light;
Step 1.3: the quick three-dimensional reconstructing of corps canopy structure; Open the loose point of laser structure light transmitter, then utilize the photogrammetric module of binocular to take pictures to corps canopy, the photogrammetric module of binocular completes cloud data generation automatically according to image and laser structure optical information, and cloud data is 3-D data set;
Step 2: light spectrum image-forming module radiant correction, its specific implementation comprises following sub-step:
Step 2.1: laboratory absolute radiometric calibration, use integrating sphere as calibration radiation source, under indoor design condition, light spectrum image-forming module is done to radiation calibration test;
Step 2.2: the image Rapid radiating based on ground standard reflecting plate is proofreaied and correct, and by place standard white plate in image capturing range, the elevation information obtaining by tape measure, determines blank size, blank position, location, obtains blank spoke brightness value;
Step 3: canopy image geometry and spectrum fusion treatment, its specific implementation comprises following sub-step:
Step 3.1: basic geometric manipulations;
Step 3.2: canopy image processing;
Step 4: Grain Growth Situation parameter information abstraction function, its specific implementation comprises following sub-step:
Step 4.1: biophysical parameters obtains;
Structural light measurement technology based on laser triangulation range measurement principle, obtains three-dimensional coordinate or the spatial shape of each hot spot or striation by photogrammetric technology, can realize the fast automatic measurement of the corps canopy structure under complicated natural conditions;
Step 4.2: biochemical parameters is obtained;
Record and analysis vegetation are at the spectral reflectance signal of characteristic wave bands, and in conjunction with laser structure photo measure data, estimation reflects the biochemical parameters of Grain Growth Situation, and described biochemical parameters comprises crops coverage, leaf area index and chlorophyll content.
As preferably, laboratory absolute radiometric calibration described in step 2.1, it is the uniform and stable radiant light that allows the semi-integral ball that is erected in satellite side export, transfer into camera pendulum mirror and camera lens by 45 ° of test speculums of camera top, be irradiated in the CCD spy unit of focal plane through Amici prism and splicing prism, CCD visits unit and completes output voltage signal value after opto-electronic conversion, passes system reception & disposal through number, then gathers calibration data by digital collection module.
As preferably, the basic geometric manipulations described in step 3.1, first obtains comprising by laser detector and multiple spot range information and the camera parameter of canopy height, background elevation information utilizes relative geometric space relation to carry out the calculating of optical camera engineer's scale; Then gather correction by how much conformation models of collinearity equation, obtain canopy orthography; Multi-channel optical image is carried out to interchannel registration simultaneously, obtain canopy multichannel gray scale sequence data.
As preferably, the canopy image processing described in step 3.2, first carries out image to canopy orthography and cuts apart, and obtains canopy and background characteristics image; Carry out on this basis the calculating of canopy apparent area and obtain canopy leaves area parameters; Multichannel image after registration is sampled taking wavelength as variable simultaneously, from image, extract canopy spectra data.
With respect to prior art, the invention has the beneficial effects as follows: can be with the disposable Hyperspectral imaging of crops to laser reflection information and six sensitive bands that obtain of cordless, directly fast generate crops and there is the multispectral image of three-dimensional stereo model, thereby directly extract the parameter such as plant height, plant degree of compacting, leaf area index, chlorophyll content, plant coverage rate of crops.
Brief description of the drawings
Fig. 1: the work of embodiment of the present invention device and Functional Design schematic diagram;
Fig. 2: embodiment of the present invention device design principle figure;
Fig. 3: in embodiment of the present invention device, cmos sensor is at the quantum efficiency figure of different wave length;
Fig. 4: the photogrammetric artwork of structured light in embodiment of the present invention method;
Fig. 5: the process chart of Laboratory Radiometric Calibration in embodiment of the present invention method;
Fig. 6: the image Rapid radiating correction process flow chart based on ground standard reflecting plate in embodiment of the present invention method;
Fig. 7: embodiment of the present invention method flow diagram.
Detailed description of the invention
Understand and enforcement the present invention for the ease of those of ordinary skill in the art, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
The present invention combines multispectral camera and laser structure light, realizes the parameter measurement of Portable rural crop growing state and intellectual analysis. This instrument volume is little, lightweight, hand-holdable use or be erected on multiple types of floors platform. This instrument comprises hardware integration, data acquisition, data processing and data analysis and application module function, to fast crops being carried out to real-time growing way monitoring.
Ask for an interview Fig. 1 and Fig. 2, a kind of Portable rural crop provided by the invention parameter measurement and growing way intellectual analysis device, comprise light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis and application module and battery module; Imaging acquisition control module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, data acquisition module, data processing module and data analysis respectively; Battery module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis respectively, and electric power is provided.
Light spectrum image-forming module is made up of Varifocal zoom lens, specific band optical filter and COMS imageing sensor three assemblies, and three assemblies are according to order assembling from top to bottom. Light spectrum image-forming module has 6 groups, becomes two rows each 3 layouts, and described light spectrum image-forming module is positioned at the bottom surface central authorities of crust of the device, is horizontally disposed with, when work, place carry crops just above;
Varifocal zoom lens is the camera lens of constant aperture and burnt long ± 30 ° of angles of visual field, make light spectrum image-forming module 2.5 meters of height can earth observation to the rectangular area of 3*3 rice; Between 6 COMS imageing sensors and corresponding camera lens, blue wave band is contained in configuration respectively, green wave band, and red wave band, red side wave section, the appointment bandpass filter of infrared band, 2 COMS imageing sensors of the photogrammetric module of binocular are unworthy of optical filter.
Because CMOS is in the quantum efficiency difference of different-waveband, so need to calibrating the software of rear use signal processing module, the measured value between different-waveband is normalized, ask for an interview Fig. 3, for cmos sensor is at the quantum efficiency figure of different wave length
If comprehensively measuring distance and the focusing of automatic focusing algorithm of laser range finder automatically adjust need to carry out leaf area measurement.
The photogrammetric module of binocular is two groups, for obtaining visible ray digitized video, is arranged in respectively the both sides of described light spectrum image-forming module;
The loose point of laser structure light transmitter module in the present invention will be in the photogrammetric module cooperating of binocular, for assisting implementation structure light photogrammetric. The loose point of laser structure light transmitter is accepted external trigger signal and is radiated on crops with the transmitting two-dimensional laser hot spot that is in due course, and after its imaging, arm processor calculates the outline of crops by method of structured light.
The loose point of laser structure light transmitter is arranged at described light spectrum image-forming module below, and 2 lens directions of the primary optical axis of 6 camera lenses of light spectrum image-forming module and the photogrammetric module of described binocular are consistent, and primary optical axis is forward parallel; The loose point of laser structure light transmitter transmit direction is consistent with described light spectrum image-forming module lens direction;
The present invention, by the structural light measurement technology based on laser triangulation range measurement principle, realizes the corps canopy structure fast automatic measurement under complicated natural conditions. To wait light-splitting device that laser instrument point light source of single is converted to specific form as light source, produce etc. interval point-like projection source, make the light beam irradiates measured surface of its generation. Obtain three-dimensional coordinate or the spatial shape of each hot spot or striation by photogrammetric technology, realize the three-dimensional reconstruction of corps canopy structure by spatial interpolation technology.
Ask for an interview Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of Portable rural crop provided by the invention parameter measurement and growing way intelligent analysis method, comprise the following steps:
Step 1: corps canopy quick three-dimensional reconstructing technical method, its specific implementation comprises following sub-step:
Step 1.1: the structured light form of the photogrammetric measurement of corps canopy binocular is adjusted. This step is not identical for the canopy structure of different crops and same crops different times, and different frequency is swashed to reflection of light to different canopy layers and absorptivity also there are differences. To adjust by experiment, determine under different canopy layers condition corresponding optimum structure light form separately, and further determine the application conditions of several structured light form and corresponding specific vegetation canopy thereof. The parameter that wherein structured light form comprises laser frequency and two aspects of beam shape.
Step 1.2: structured light photogrammetric calibration. Structural light measurement parts comprise laser light projector and corresponding camera thereof, form rigid body and connect between them, jointly realize binocular photogrammetric. Therefore, calibration can be divided into two steps: camera calibration and projector are demarcated. Ask for an interview Fig. 4, camera calibration comprises lens distortion by adopting ripe photogrammetric bundle adjustment technology to obtain, interior foreign side is that element is at interior high-precision camera parameter; Projector calibration be by structured light projection to the demarcation thing of known form, by camera filmed image, the demarcation that the inverse process by principle of triangulation can implementation structure light;
Step 1.3: the quick three-dimensional reconstructing of corps canopy structure. Open the loose point of laser structure light transmitter, then utilize the photogrammetric module of binocular to take pictures to vegetation canopy, the photogrammetric module of binocular completes cloud data generation automatically according to image and laser structure optical information, and cloud data is 3-D data set.
Step 2: light spectrum image-forming module radiant correction. Radiant correction is chamber absolute calibration and two sections of place correction by experiment, and the former sets up DN value and image radiance transformational relation, and the latter is used for generating reflectivity image. Its specific implementation comprises following sub-step:
Step 2.1: laboratory absolute radiometric calibration.
Laboratory Radiometric Calibration experiment is used semi-integral ball as calibration radiation source, under indoor design condition, light spectrum image-forming module is done to radiation calibration test. Fig. 5 is shown in the technological process of Laboratory Radiometric Calibration.
The basic skills of experiment is the uniform and stable radiant light that allows the semi-integral ball that is erected in satellite side export, transfer into camera pendulum mirror and camera lens by 45 ° of test speculums of camera top, be irradiated in the CCD spy unit of focal plane through Amici prism and splicing prism, CCD completes output voltage signal value after opto-electronic conversion, pass system reception & disposal through number, then gather calibration data by digital collection module. The radiant light of semi-integral ball output is regarded as to uniform source of light, and this is the basis of relative radiant correction. In order to ensure the precision of calibration data, the upper error of eliminating largely, semi-integral ball light source comprises 13 spoke intensity levels (comprising one-level dark current), spoke brightness separation between each spoke intensity level is basically identical, low spoke intensity level is the antiradar reflectivity atural object in surface imaging process in analog, and high spoke intensity level is the high reflectance atural object in surface imaging process in analog. By one-level dark current image and spoke brightness image at different levels, calculate calibration coefficient.
Step 2.2: the image Rapid radiating based on ground standard reflecting plate is proofreaied and correct.
Because this instrument is mainly used in ground corps canopy data acquisition and information extraction, reflectivity image capturing mainly by placing standard white plate in image capturing range, and the elevation information obtaining by tape measure, determines blank size. Blank position, location, obtains blank spoke brightness value fast, as shown in Figure 6 whole image is carried out to reflectivity and resolves.
Step 3: canopy image geometry and spectrum fusion treatment, canopy image geometry treatment technology of the present invention mainly comprises two levels, basic geometric manipulations and canopy image are processed two parts. Route as shown in Figure 7.
The basic geometric manipulations of step 3.1. Utilize the photogrammetric module of binocular can realize basic geometric manipulations, solve engineer's scale calculating, geometric correction and Image registration problem by photogrammetric technology. First, multiple spot range information and the camera parameter such as canopy height, background height that obtain by laser detector, utilize relative geometric space relation to carry out the calculating of optical camera engineer's scale; Then gather correction by geometry conformation models such as collinearity equations, obtain canopy orthography; Multi-channel optical image is carried out to interchannel registration simultaneously, obtain canopy multichannel gray scale sequence data.
The image processing of step 3.2 canopy. The basic three dimensional point cloud that system provides multispectral imaging spectrum image that module is obtained and the photogrammetric module of binocular mates, and solves canopy parameter acquiring problem. First canopy orthography is carried out to image and cut apart, obtain canopy and background characteristics image; Carry out on this basis the calculating of canopy apparent area and obtain the geometric parameters such as canopy leaves area; Multichannel image after registration is sampled taking wavelength as variable simultaneously, from image, extract canopy spectra data.
Step 4: Grain Growth Situation parameter information abstraction function
The biochemical physical parameter of crops has determined its optical characteristics, thereby affects corps canopy and electromagnetic interaction, has caused the variation of vegetation reflectance spectrum signal. High-spectrum remote-sensing, by analyzing the spectral signature response curve of vegetation, extracts the spectral reflectance data of the wave band (being characteristic wave bands) to crop growth sensitive, can reach higher inversion accuracy. Specifically comprise two sub-steps:
Step 4.1 biophysical parameters obtains;
Structural light measurement technology based on laser triangulation range measurement principle, obtains three-dimensional coordinate or the spatial shape of each hot spot or striation by photogrammetric technology, can realize the fast automatic measurement of the corps canopy structure under complicated natural conditions.
Step 4.2 biochemical parameters is obtained;
Record and analysis vegetation are at the spectral reflectance signal of characteristic wave bands, and in conjunction with laser structure photo measure data, estimation reflects the biochemical parameters of Grain Growth Situation. This instrument can be erected at the plant top in laboratory or field, by the disposable many kinds of parameters that obtains of single measurement, mainly comprises vegetation coverage, leaf area index and chlorophyll content.
Should be understood that, the part that this description does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; can not therefore think the restriction to scope of patent protection of the present invention; those of ordinary skill in the art is under enlightenment of the present invention; do not departing from the scope situation that the claims in the present invention protect; can also make and replacing or distortion, within all falling into protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (9)
1. the parameter measurement of Portable rural crop and a growing way intellectual analysis device, is characterized in that: comprise light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis and application module and battery module;
Described light spectrum image-forming module has 6 groups, becomes two rows each 3 layouts, and described light spectrum image-forming module is positioned at the bottom surface central authorities of crust of the device, is horizontally disposed with, when work, place carry crops just above; The photogrammetric module of described binocular is two groups, is arranged in respectively the both sides of described light spectrum image-forming module; The loose point of described laser structure light transmitter is arranged at described light spectrum image-forming module below, and the primary optical axis of 6 camera lenses of described light spectrum image-forming module is consistent with 2 lens directions of the photogrammetric module of described binocular, and primary optical axis is forward parallel; The loose point of described laser structure light transmitter transmit direction is consistent with described light spectrum image-forming module lens direction;
Described imaging acquisition control module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, data acquisition module, data processing module and data analysis respectively;
Described battery module is connected with application module with described light spectrum image-forming module, the loose point of laser structure light transmitter, the photogrammetric module of binocular, imaging acquisition control module, data acquisition module, data processing module and data analysis respectively, and electric power is provided.
2. Portable rural crop according to claim 1 parameter measurement and growing way intellectual analysis device, it is characterized in that: described light spectrum image-forming module is made up of Varifocal zoom lens, specific band optical filter and COMS imageing sensor three assemblies, three assemblies are according to order assembling from top to bottom.
3. Portable rural crop according to claim 2 parameter measurement and growing way intellectual analysis device, it is characterized in that: described Varifocal zoom lens is the camera lens of constant aperture and burnt long ± 30 ° of angles of visual field, make light spectrum image-forming module 2.5 meters of height can earth observation to the rectangular area of 3*3 rice.
4. Portable rural crop according to claim 2 parameter measurement and growing way intellectual analysis device, it is characterized in that: between described 6 COMS imageing sensors and corresponding camera lens, configure respectively the appointment bandpass filter of containing blue wave band, green wave band, red wave band, red side wave section, infrared band, 2 COMS imageing sensors of the photogrammetric module of binocular are unworthy of optical filter.
5. Portable rural crop according to claim 1 parameter measurement and growing way intellectual analysis device, is characterized in that: described imaging acquisition control module also disposes GPS module, 3G/WIFI module and touch screen module, for installing output and input message.
6. the parameter measurement of Portable rural crop and a growing way intelligent analysis method, is characterized in that, comprises the following steps:
Step 1: corps canopy three-dimensional reconstruction, its specific implementation comprises following sub-step:
Step 1.1: the structured light form of the photogrammetric measurement of corps canopy binocular is adjusted; The parameter that described structured light form comprises laser frequency and two aspects of beam shape;
Step 1.2: structured light photogrammetric calibration, comprises that camera calibration and projector demarcate two steps; Described camera calibration adopts photogrammetric bundle adjustment technology to obtain to comprise lens distortion, interior foreign side is that element is at interior high-precision camera parameter; The calibration of described projector be by structured light projection to the demarcation thing of known form, by camera filmed image, the demarcation that the inverse process by principle of triangulation can implementation structure light;
Step 1.3: the quick three-dimensional reconstructing of corps canopy structure; Open the loose point of laser structure light transmitter, then utilize the photogrammetric module of binocular to take pictures to corps canopy, the photogrammetric module of binocular completes cloud data generation automatically according to image and laser structure optical information, and cloud data is 3-D data set;
Step 2: light spectrum image-forming module radiant correction, its specific implementation comprises following sub-step:
Step 2.1: laboratory absolute radiometric calibration, use integrating sphere as calibration radiation source, under indoor design condition, light spectrum image-forming module is done to radiation calibration test;
Step 2.2: the image Rapid radiating based on ground standard reflecting plate is proofreaied and correct, and by place standard white plate in image capturing range, the elevation information obtaining by tape measure, determines blank size, blank position, location, obtains blank spoke brightness value;
Step 3: canopy image geometry and spectrum fusion treatment, its specific implementation comprises following sub-step:
Step 3.1: basic geometric manipulations;
Step 3.2: canopy image processing;
Step 4: Grain Growth Situation parameter information abstraction function, its specific implementation comprises following sub-step:
Step 4.1: biophysical parameters obtains;
Structural light measurement technology based on laser triangulation range measurement principle, obtains three-dimensional coordinate or the spatial shape of each hot spot or striation by photogrammetric technology, can realize the fast automatic measurement of the corps canopy structure under complicated natural conditions;
Step 4.2: biochemical parameters is obtained;
Record and analysis vegetation are at the spectral reflectance signal of characteristic wave bands, and in conjunction with laser structure photo measure data, estimation reflects the biochemical parameters of Grain Growth Situation, and described biochemical parameters comprises crops coverage, leaf area index and chlorophyll content.
7. Portable rural crop according to claim 6 parameter measurement and growing way intelligent analysis method, it is characterized in that: the laboratory absolute radiometric calibration described in step 2.1, it is the uniform and stable radiant light that allows the semi-integral ball that is erected in satellite side export, transfer into camera pendulum mirror and camera lens by 45 ° of test speculums of camera top, be irradiated in the CCD spy unit of focal plane through Amici prism and splicing prism, CCD visits unit and completes output voltage signal value after opto-electronic conversion, pass system reception & disposal through number, then gather calibration data by digital collection module.
8. Portable rural crop according to claim 6 parameter measurement and growing way intelligent analysis method, it is characterized in that: the basic geometric manipulations described in step 3.1, first obtain comprising multiple spot range information and the camera parameter of canopy height, background elevation information by laser detector, utilize relative geometric space relation to carry out the calculating of optical camera engineer's scale; Then gather correction by how much conformation models of collinearity equation, obtain canopy orthography; Multi-channel optical image is carried out to interchannel registration simultaneously, obtain canopy multichannel gray scale sequence data.
9. Portable rural crop according to claim 6 parameter measurement and growing way intelligent analysis method, is characterized in that: the canopy image processing described in step 3.2, and first canopy orthography is carried out to image and cut apart, obtain canopy and background characteristics image; Carry out on this basis the calculating of canopy apparent area and obtain canopy leaves area parameters; Multichannel image after registration is sampled taking wavelength as variable simultaneously, from image, extract canopy spectra data.
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| CN110927082A (en) * | 2019-11-25 | 2020-03-27 | 北京大学 | Winter wheat yield prediction method based on unmanned aerial vehicle imaging hyperspectral remote sensing |
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| CN111882621A (en) * | 2020-07-22 | 2020-11-03 | 武汉大学 | Rice thickness parameter automatic measurement method based on binocular image |
| CN112097679A (en) * | 2020-09-10 | 2020-12-18 | 厦门海铂特生物科技有限公司 | Three-dimensional space measuring method based on optical information |
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